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arm64 and cross-arch updates for 5.9:

Browse Source 
- Removal of the tremendously unpopular read_barrier_depends() barrier,
   which is a NOP on all architectures apart from Alpha, in favour of
   allowing architectures to override READ_ONCE() and do whatever dance
   they need to do to ensure address dependencies provide LOAD ->
   LOAD/STORE ordering. This work also offers a potential solution if
   compilers are shown to convert LOAD -> LOAD address dependencies into
   control dependencies (e.g. under LTO), as weakly ordered architectures
   will effectively be able to upgrade READ_ONCE() to smp_load_acquire().
   The latter case is not used yet, but will be discussed further at LPC.
 
 - Make the MSI/IOMMU input/output ID translation PCI agnostic, augment
   the MSI/IOMMU ACPI/OF ID mapping APIs to accept an input ID
   bus-specific parameter and apply the resulting changes to the device
   ID space provided by the Freescale FSL bus.
 
 - arm64 support for TLBI range operations and translation table level
   hints (part of the ARMv8.4 architecture version).
 
 - Time namespace support for arm64.
 
 - Export the virtual and physical address sizes in vmcoreinfo for
   makedumpfile and crash utilities.
 
 - CPU feature handling cleanups and checks for programmer errors
   (overlapping bit-fields).
 
 - ACPI updates for arm64: disallow AML accesses to EFI code regions and
   kernel memory.
 
 - perf updates for arm64.
 
 - Miscellaneous fixes and cleanups, most notably PLT counting
   optimisation for module loading, recordmcount fix to ignore
   relocations other than R_AARCH64_CALL26, CMA areas reserved for
   gigantic pages on 16K and 64K configurations.
 
 - Trivial typos, duplicate words.
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 and cross-arch updates from Catalin Marinas:
 "Here's a slightly wider-spread set of updates for 5.9.

  Going outside the usual arch/arm64/ area is the removal of
  read_barrier_depends() series from Will and the MSI/IOMMU ID
  translation series from Lorenzo.

  The notable arm64 updates include ARMv8.4 TLBI range operations and
  translation level hint, time namespace support, and perf.

  Summary:

   - Removal of the tremendously unpopular read_barrier_depends()
     barrier, which is a NOP on all architectures apart from Alpha, in
     favour of allowing architectures to override READ_ONCE() and do
     whatever dance they need to do to ensure address dependencies
     provide LOAD -> LOAD/STORE ordering.

     This work also offers a potential solution if compilers are shown
     to convert LOAD -> LOAD address dependencies into control
     dependencies (e.g. under LTO), as weakly ordered architectures will
     effectively be able to upgrade READ_ONCE() to smp_load_acquire().
     The latter case is not used yet, but will be discussed further at
     LPC.

   - Make the MSI/IOMMU input/output ID translation PCI agnostic,
     augment the MSI/IOMMU ACPI/OF ID mapping APIs to accept an input ID
     bus-specific parameter and apply the resulting changes to the
     device ID space provided by the Freescale FSL bus.

   - arm64 support for TLBI range operations and translation table level
     hints (part of the ARMv8.4 architecture version).

   - Time namespace support for arm64.

   - Export the virtual and physical address sizes in vmcoreinfo for
     makedumpfile and crash utilities.

   - CPU feature handling cleanups and checks for programmer errors
     (overlapping bit-fields).

   - ACPI updates for arm64: disallow AML accesses to EFI code regions
     and kernel memory.

   - perf updates for arm64.

   - Miscellaneous fixes and cleanups, most notably PLT counting
     optimisation for module loading, recordmcount fix to ignore
     relocations other than R_AARCH64_CALL26, CMA areas reserved for
     gigantic pages on 16K and 64K configurations.

   - Trivial typos, duplicate words"

Link: http://lkml.kernel.org/r/20200710165203.31284-1-will@kernel.org
Link: http://lkml.kernel.org/r/20200619082013.13661-1-lorenzo.pieralisi@arm.com

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (82 commits)
  arm64: use IRQ_STACK_SIZE instead of THREAD_SIZE for irq stack
  arm64/mm: save memory access in check_and_switch_context() fast switch path
  arm64: sigcontext.h: delete duplicated word
  arm64: ptrace.h: delete duplicated word
  arm64: pgtable-hwdef.h: delete duplicated words
  bus: fsl-mc: Add ACPI support for fsl-mc
  bus/fsl-mc: Refactor the MSI domain creation in the DPRC driver
  of/irq: Make of_msi_map_rid() PCI bus agnostic
  of/irq: make of_msi_map_get_device_domain() bus agnostic
  dt-bindings: arm: fsl: Add msi-map device-tree binding for fsl-mc bus
  of/device: Add input id to of_dma_configure()
  of/iommu: Make of_map_rid() PCI agnostic
  ACPI/IORT: Add an input ID to acpi_dma_configure()
  ACPI/IORT: Remove useless PCI bus walk
  ACPI/IORT: Make iort_msi_map_rid() PCI agnostic
  ACPI/IORT: Make iort_get_device_domain IRQ domain agnostic
  ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC
  arm64: enable time namespace support
  arm64/vdso: Restrict splitting VVAR VMA
  arm64/vdso: Handle faults on timens page
  ...
This commit is contained in:
Linus Torvalds 2020-08-03 14:11:08 -07:00
commit 145ff1ec09
98 changed files with 1895 additions and 1094 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/RCU/Design/Requirements/Requirements.rst
View File

@ -463,7 +463,7 @@ again without disrupting RCU readers.
This guarantee was only partially premeditated. DYNIX/ptx used an
explicit memory barrier for publication, but had nothing resembling
``rcu_dereference()`` for subscription, nor did it have anything
resembling the ``smp_read_barrier_depends()`` that was later subsumed
resembling the dependency-ordering barrier that was later subsumed
into ``rcu_dereference()`` and later still into ``READ_ONCE()``. The
need for these operations made itself known quite suddenly at a
late-1990s meeting with the DEC Alpha architects, back in the days when

16
Documentation/admin-guide/kdump/vmcoreinfo.rst
View File

@ -93,6 +93,11 @@ It exists in the sparse memory mapping model, and it is also somewhat
similar to the mem_map variable, both of them are used to translate an
address.
MAX_PHYSMEM_BITS
----------------
Defines the maximum supported physical address space memory.
page
----
@ -399,6 +404,17 @@ KERNELPACMASK
The mask to extract the Pointer Authentication Code from a kernel virtual
address.
TCR_EL1.T1SZ
------------
Indicates the size offset of the memory region addressed by TTBR1_EL1.
The region size is 2^(64-T1SZ) bytes.
TTBR1_EL1 is the table base address register specified by ARMv8-A
architecture which is used to lookup the page-tables for the Virtual
addresses in the higher VA range (refer to ARMv8 ARM document for
more details).
arm
===

50
Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
View File

@ -28,6 +28,16 @@ Documentation/devicetree/bindings/iommu/iommu.txt.
For arm-smmu binding, see:
Documentation/devicetree/bindings/iommu/arm,smmu.yaml.
The MSI writes are accompanied by sideband data which is derived from the ICID.
The msi-map property is used to associate the devices with both the ITS
controller and the sideband data which accompanies the writes.
For generic MSI bindings, see
Documentation/devicetree/bindings/interrupt-controller/msi.txt.
For GICv3 and GIC ITS bindings, see:
Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml.
Required properties:
- compatible
@ -49,11 +59,6 @@ Required properties:
region may not be present in some scenarios, such
as in the device tree presented to a virtual machine.
- msi-parent
Value type: <phandle>
Definition: Must be present and point to the MSI controller node
handling message interrupts for the MC.
- ranges
Value type: <prop-encoded-array>
Definition: A standard property. Defines the mapping between the child
@ -119,6 +124,28 @@ Optional properties:
associated with the listed IOMMU, with the iommu-specifier
(i - icid-base + iommu-base).
- msi-map: Maps an ICID to a GIC ITS and associated msi-specifier
data.
The property is an arbitrary number of tuples of
(icid-base,gic-its,msi-base,length).
Any ICID in the interval [icid-base, icid-base + length) is
associated with the listed GIC ITS, with the msi-specifier
(i - icid-base + msi-base).
Deprecated properties:
- msi-parent
Value type: <phandle>
Definition: Describes the MSI controller node handling message
interrupts for the MC. When there is no translation
between the ICID and deviceID this property can be used
to describe the MSI controller used by the devices on the
mc-bus.
The use of this property for mc-bus is deprecated. Please
use msi-map.
Example:
smmu: iommu@5000000 {
@ -128,13 +155,24 @@ Example:
...
};
gic: interrupt-controller@6000000 {
compatible = "arm,gic-v3";
...
}
its: gic-its@6020000 {
compatible = "arm,gic-v3-its";
msi-controller;
...
};
fsl_mc: fsl-mc@80c000000 {
compatible = "fsl,qoriq-mc";
reg = <0x00000008 0x0c000000 0 0x40>, /* MC portal base */
<0x00000000 0x08340000 0 0x40000>; /* MC control reg */
msi-parent = <&its>;
/* define map for ICIDs 23-64 */
iommu-map = <23 &smmu 23 41>;
/* define msi map for ICIDs 23-64 */
msi-map = <23 &its 23 41>;
#address-cells = <3>;
#size-cells = <1>;

156
Documentation/memory-barriers.txt
View File

@ -553,12 +553,12 @@ There are certain things that the Linux kernel memory barriers do not guarantee:
DATA DEPENDENCY BARRIERS (HISTORICAL)
-------------------------------------
As of v4.15 of the Linux kernel, an smp_read_barrier_depends() was
added to READ_ONCE(), which means that about the only people who
need to pay attention to this section are those working on DEC Alpha
architecture-specific code and those working on READ_ONCE() itself.
For those who need it, and for those who are interested in the history,
here is the story of data-dependency barriers.
As of v4.15 of the Linux kernel, an smp_mb() was added to READ_ONCE() for
DEC Alpha, which means that about the only people who need to pay attention
to this section are those working on DEC Alpha architecture-specific code
and those working on READ_ONCE() itself. For those who need it, and for
those who are interested in the history, here is the story of
data-dependency barriers.
The usage requirements of data dependency barriers are a little subtle, and
it's not always obvious that they're needed. To illustrate, consider the
@ -2708,144 +2708,6 @@ the properties of the memory window through which devices are accessed and/or
the use of any special device communication instructions the CPU may have.
CACHE COHERENCY
---------------
Life isn't quite as simple as it may appear above, however: for while the
caches are expected to be coherent, there's no guarantee that that coherency
will be ordered. This means that while changes made on one CPU will
eventually become visible on all CPUs, there's no guarantee that they will
become apparent in the same order on those other CPUs.
Consider dealing with a system that has a pair of CPUs (1 & 2), each of which
has a pair of parallel data caches (CPU 1 has A/B, and CPU 2 has C/D):
:
: +--------+
: +---------+ | |
+--------+ : +--->| Cache A |<------->| |
| | : | +---------+ | |
| CPU 1 |<---+ | |
| | : | +---------+ | |
+--------+ : +--->| Cache B |<------->| |
: +---------+ | |
: | Memory |
: +---------+ | System |
+--------+ : +--->| Cache C |<------->| |
| | : | +---------+ | |
| CPU 2 |<---+ | |
| | : | +---------+ | |
+--------+ : +--->| Cache D |<------->| |
: +---------+ | |
: +--------+
:
Imagine the system has the following properties:
(*) an odd-numbered cache line may be in cache A, cache C or it may still be
resident in memory;
(*) an even-numbered cache line may be in cache B, cache D or it may still be
resident in memory;
(*) while the CPU core is interrogating one cache, the other cache may be
making use of the bus to access the rest of the system - perhaps to
displace a dirty cacheline or to do a speculative load;
(*) each cache has a queue of operations that need to be applied to that cache
to maintain coherency with the rest of the system;
(*) the coherency queue is not flushed by normal loads to lines already
present in the cache, even though the contents of the queue may
potentially affect those loads.
Imagine, then, that two writes are made on the first CPU, with a write barrier
between them to guarantee that they will appear to reach that CPU's caches in
the requisite order:
CPU 1 CPU 2 COMMENT
=============== =============== =======================================
u == 0, v == 1 and p == &u, q == &u
v = 2;
smp_wmb(); Make sure change to v is visible before
change to p
<A:modify v=2> v is now in cache A exclusively
p = &v;
<B:modify p=&v> p is now in cache B exclusively
The write memory barrier forces the other CPUs in the system to perceive that
the local CPU's caches have apparently been updated in the correct order. But
now imagine that the second CPU wants to read those values:
CPU 1 CPU 2 COMMENT
=============== =============== =======================================
...
q = p;
x = *q;
The above pair of reads may then fail to happen in the expected order, as the
cacheline holding p may get updated in one of the second CPU's caches while
the update to the cacheline holding v is delayed in the other of the second
CPU's caches by some other cache event:
CPU 1 CPU 2 COMMENT
=============== =============== =======================================
u == 0, v == 1 and p == &u, q == &u
v = 2;
smp_wmb();
<A:modify v=2> <C:busy>
<C:queue v=2>
p = &v; q = p;
<D:request p>
<B:modify p=&v> <D:commit p=&v>
<D:read p>
x = *q;
<C:read *q> Reads from v before v updated in cache
<C:unbusy>
<C:commit v=2>
Basically, while both cachelines will be updated on CPU 2 eventually, there's
no guarantee that, without intervention, the order of update will be the same
as that committed on CPU 1.
To intervene, we need to interpolate a data dependency barrier or a read
barrier between the loads (which as of v4.15 is supplied unconditionally
by the READ_ONCE() macro). This will force the cache to commit its
coherency queue before processing any further requests:
CPU 1 CPU 2 COMMENT
=============== =============== =======================================
u == 0, v == 1 and p == &u, q == &u
v = 2;
smp_wmb();
<A:modify v=2> <C:busy>
<C:queue v=2>
p = &v; q = p;
<D:request p>
<B:modify p=&v> <D:commit p=&v>
<D:read p>
smp_read_barrier_depends()
<C:unbusy>
<C:commit v=2>
x = *q;
<C:read *q> Reads from v after v updated in cache
This sort of problem can be encountered on DEC Alpha processors as they have a
split cache that improves performance by making better use of the data bus.
While most CPUs do imply a data dependency barrier on the read when a memory
access depends on a read, not all do, so it may not be relied on.
Other CPUs may also have split caches, but must coordinate between the various
cachelets for normal memory accesses. The semantics of the Alpha removes the
need for hardware coordination in the absence of memory barriers, which
permitted Alpha to sport higher CPU clock rates back in the day. However,
please note that (again, as of v4.15) smp_read_barrier_depends() should not
be used except in Alpha arch-specific code and within the READ_ONCE() macro.
CACHE COHERENCY VS DMA
----------------------
@ -3009,10 +2871,8 @@ caches with the memory coherence system, thus making it seem like pointer
changes vs new data occur in the right order.
The Alpha defines the Linux kernel's memory model, although as of v4.15
the Linux kernel's addition of smp_read_barrier_depends() to READ_ONCE()
greatly reduced Alpha's impact on the memory model.
See the subsection on "Cache Coherency" above.
the Linux kernel's addition of smp_mb() to READ_ONCE() on Alpha greatly
reduced its impact on the memory model.
VIRTUAL MACHINE GUESTS

146
Documentation/translations/ko_KR/memory-barriers.txt
View File

@ -577,7 +577,7 @@ ACQUIRE 는 해당 오퍼레이션의 로드 부분에만 적용되고 RELEASE
데이터 의존성 배리어 (역사적)
-----------------------------
리눅스 커널 v4.15 기준으로, smp_read_barrier_depends() 가 READ_ONCE() 에
리눅스 커널 v4.15 기준으로, smp_mb() 가 DEC Alpha 용 READ_ONCE() 코드에
추가되었는데, 이는 이 섹션에 주의를 기울여야 하는 사람들은 DEC Alpha 아키텍쳐
전용 코드를 만드는 사람들과 READ_ONCE() 자체를 만드는 사람들 뿐임을 의미합니다.
그런 분들을 위해, 그리고 역사에 관심 있는 분들을 위해, 여기 데이터 의존성
@ -2664,144 +2664,6 @@ CPU 코어는 프로그램의 인과성이 유지된다고만 여겨진다면
수도 있습니다.
캐시 일관성
-----------
하지만 삶은 앞에서 이야기한 것처럼 단순하지 않습니다: 캐시들은 일관적일 것으로
기대되지만, 그 일관성이 순서에도 적용될 거라는 보장은 없습니다. 한 CPU 에서
만들어진 변경 사항은 최종적으로는 시스템의 모든 CPU 에게 보여지게 되지만, 다른
CPU 들에게도 같은 순서로 보이게 될 거라는 보장은 없다는 뜻입니다.
두개의 CPU (1 & 2) 가 달려 있고, 각 CPU 에 두개의 데이터 캐시(CPU 1 은 A/B 를,
CPU 2 는 C/D 를 갖습니다)가 병렬로 연결되어 있는 시스템을 다룬다고 생각해
봅시다:
:
: +--------+
: +---------+ | |
+--------+ : +--->| Cache A |<------->| |
| | : | +---------+ | |
| CPU 1 |<---+ | |
| | : | +---------+ | |
+--------+ : +--->| Cache B |<------->| |
: +---------+ | |
: | Memory |
: +---------+ | System |
+--------+ : +--->| Cache C |<------->| |
| | : | +---------+ | |
| CPU 2 |<---+ | |
| | : | +---------+ | |
+--------+ : +--->| Cache D |<------->| |
: +---------+ | |
: +--------+
:
이 시스템이 다음과 같은 특성을 갖는다 생각해 봅시다:
(*) 홀수번 캐시라인은 캐시 A, 캐시 C 또는 메모리에 위치할 수 있음;
(*) 짝수번 캐시라인은 캐시 B, 캐시 D 또는 메모리에 위치할 수 있음;
(*) CPU 코어가 한개의 캐시에 접근하는 동안, 다른 캐시는 - 더티 캐시라인을
메모리에 내리거나 추측성 로드를 하거나 하기 위해 - 시스템의 다른 부분에
액세스 하기 위해 버스를 사용할 수 있음;
(*) 각 캐시는 시스템의 나머지 부분들과 일관성을 맞추기 위해 해당 캐시에
적용되어야 할 오퍼레이션들의 큐를 가짐;
(*) 이 일관성 큐는 캐시에 이미 존재하는 라인에 가해지는 평범한 로드에 의해서는
비워지지 않는데, 큐의 오퍼레이션들이 이 로드의 결과에 영향을 끼칠 수 있다
할지라도 그러함.
이제, 첫번째 CPU 에서 두개의 쓰기 오퍼레이션을 만드는데, 해당 CPU 의 캐시에
요청된 순서로 오퍼레이션이 도달됨을 보장하기 위해 두 오퍼레이션 사이에 쓰기
배리어를 사용하는 상황을 상상해 봅시다:
CPU 1 CPU 2 COMMENT
=============== =============== =======================================
u == 0, v == 1 and p == &u, q == &u
v = 2;
smp_wmb(); v 의 변경이 p 의 변경 전에 보일 것을
분명히 함
<A:modify v=2> v 는 이제 캐시 A 에 독점적으로 존재함
p = &v;
<B:modify p=&v> p 는 이제 캐시 B 에 독점적으로 존재함
여기서의 쓰기 메모리 배리어는 CPU 1 의 캐시가 올바른 순서로 업데이트 된 것으로
시스템의 다른 CPU 들이 인지하게 만듭니다. 하지만, 이제 두번째 CPU 가 그 값들을
읽으려 하는 상황을 생각해 봅시다:
CPU 1 CPU 2 COMMENT
=============== =============== =======================================
...
q = p;
x = *q;
위의 두개의 읽기 오퍼레이션은 예상된 순서로 일어나지 못할 수 있는데, 두번째 CPU
의 한 캐시에 다른 캐시 이벤트가 발생해 v 를 담고 있는 캐시라인의 해당 캐시에의
업데이트가 지연되는 사이, p 를 담고 있는 캐시라인은 두번째 CPU 의 다른 캐시에
업데이트 되어버렸을 수 있기 때문입니다.
CPU 1 CPU 2 COMMENT
=============== =============== =======================================
u == 0, v == 1 and p == &u, q == &u
v = 2;
smp_wmb();
<A:modify v=2> <C:busy>
<C:queue v=2>
p = &v; q = p;
<D:request p>
<B:modify p=&v> <D:commit p=&v>
<D:read p>
x = *q;
<C:read *q> 캐시에 업데이트 되기 전의 v 를 읽음
<C:unbusy>
<C:commit v=2>
기본적으로, 두개의 캐시라인 모두 CPU 2 에 최종적으로는 업데이트 될 것이지만,
별도의 개입 없이는, 업데이트의 순서가 CPU 1 에서 만들어진 순서와 동일할
것이라는 보장이 없습니다.
여기에 개입하기 위해선, 데이터 의존성 배리어나 읽기 배리어를 로드 오퍼레이션들
사이에 넣어야 합니다 (v4.15 부터는 READ_ONCE() 매크로에 의해 무조건적으로
그렇게 됩니다). 이렇게 함으로써 캐시가 다음 요청을 처리하기 전에 일관성 큐를
처리하도록 강제하게 됩니다.
CPU 1 CPU 2 COMMENT
=============== =============== =======================================
u == 0, v == 1 and p == &u, q == &u
v = 2;
smp_wmb();
<A:modify v=2> <C:busy>
<C:queue v=2>
p = &v; q = p;
<D:request p>
<B:modify p=&v> <D:commit p=&v>
<D:read p>
smp_read_barrier_depends()
<C:unbusy>
<C:commit v=2>
x = *q;
<C:read *q> 캐시에 업데이트 된 v 를 읽음
이런 부류의 문제는 DEC Alpha 계열 프로세서들에서 발견될 수 있는데, 이들은
데이터 버스를 좀 더 잘 사용해 성능을 개선할 수 있는, 분할된 캐시를 가지고 있기
때문입니다. 대부분의 CPU 는 하나의 읽기 오퍼레이션의 메모리 액세스가 다른 읽기
오퍼레이션에 의존적이라면 데이터 의존성 배리어를 내포시킵니다만, 모두가 그런건
아니기 때문에 이점에 의존해선 안됩니다.
다른 CPU 들도 분할된 캐시를 가지고 있을 수 있지만, 그런 CPU 들은 평범한 메모리
액세스를 위해서도 이 분할된 캐시들 사이의 조정을 해야만 합니다. Alpha 는 가장
약한 메모리 순서 시맨틱 (semantic) 을 선택함으로써 메모리 배리어가 명시적으로
사용되지 않았을 때에는 그런 조정이 필요하지 않게 했으며, 이는 Alpha 가 당시에
더 높은 CPU 클락 속도를 가질 수 있게 했습니다. 하지만, (다시 말하건대, v4.15
이후부터는) Alpha 아키텍쳐 전용 코드와 READ_ONCE() 매크로 내부에서를 제외하고는
smp_read_barrier_depends() 가 사용되지 않아야 함을 알아두시기 바랍니다.
캐시 일관성 VS DMA
------------------
@ -2962,10 +2824,8 @@ Alpha CPU 의 일부 버전은 분할된 데이터 캐시를 가지고 있어서
데이터의 발견을 올바른 순서로 일어나게 하기 때문입니다.
리눅스 커널의 메모리 배리어 모델은 Alpha 에 기초해서 정의되었습니다만, v4.15
부터는 리눅스 커널이 READ_ONCE() 내에 smp_read_barrier_depends() 를 추가해서
Alpha 의 메모리 모델로의 영향력이 크게 줄어들긴 했습니다.
위의 "캐시 일관성" 서브섹션을 참고하세요.
부터는 Alpha 용 READ_ONCE() 코드 내에 smp_mb() 가 추가되어서 메모리 모델로의
Alpha 의 영향력이 크게 줄어들었습니다.
가상 머신 게스트

16
arch/alpha/include/asm/atomic.h
View File

@ -16,10 +16,10 @@
/*
* To ensure dependency ordering is preserved for the _relaxed and
* _release atomics, an smp_read_barrier_depends() is unconditionally
* inserted into the _relaxed variants, which are used to build the
* barriered versions. Avoid redundant back-to-back fences in the
* _acquire and _fence versions.
* _release atomics, an smp_mb() is unconditionally inserted into the
* _relaxed variants, which are used to build the barriered versions.
* Avoid redundant back-to-back fences in the _acquire and _fence
* versions.
*/
#define __atomic_acquire_fence()
#define __atomic_post_full_fence()
@ -70,7 +70,7 @@ static inline int atomic_##op##_return_relaxed(int i, atomic_t *v) \
".previous" \
:"=&r" (temp), "=m" (v->counter), "=&r" (result) \
:"Ir" (i), "m" (v->counter) : "memory"); \
smp_read_barrier_depends(); \
smp_mb(); \
return result; \
}
@ -88,7 +88,7 @@ static inline int atomic_fetch_##op##_relaxed(int i, atomic_t *v) \
".previous" \
:"=&r" (temp), "=m" (v->counter), "=&r" (result) \
:"Ir" (i), "m" (v->counter) : "memory"); \
smp_read_barrier_depends(); \
smp_mb(); \
return result; \
}
@ -123,7 +123,7 @@ static __inline__ s64 atomic64_##op##_return_relaxed(s64 i, atomic64_t * v) \
".previous" \
:"=&r" (temp), "=m" (v->counter), "=&r" (result) \
:"Ir" (i), "m" (v->counter) : "memory"); \
smp_read_barrier_depends(); \
smp_mb(); \
return result; \
}
@ -141,7 +141,7 @@ static __inline__ s64 atomic64_fetch_##op##_relaxed(s64 i, atomic64_t * v) \
".previous" \
:"=&r" (temp), "=m" (v->counter), "=&r" (result) \
:"Ir" (i), "m" (v->counter) : "memory"); \
smp_read_barrier_depends(); \
smp_mb(); \
return result; \
}

59
arch/alpha/include/asm/barrier.h
View File

@ -2,64 +2,15 @@
#ifndef __BARRIER_H
#define __BARRIER_H
#include <asm/compiler.h>
#define mb() __asm__ __volatile__("mb": : :"memory")
#define rmb() __asm__ __volatile__("mb": : :"memory")
#define wmb() __asm__ __volatile__("wmb": : :"memory")
/**
* read_barrier_depends - Flush all pending reads that subsequents reads
* depend on.
*
* No data-dependent reads from memory-like regions are ever reordered
* over this barrier. All reads preceding this primitive are guaranteed
* to access memory (but not necessarily other CPUs' caches) before any
* reads following this primitive that depend on the data return by
* any of the preceding reads. This primitive is much lighter weight than
* rmb() on most CPUs, and is never heavier weight than is
* rmb().
*
* These ordering constraints are respected by both the local CPU
* and the compiler.
*
* Ordering is not guaranteed by anything other than these primitives,
* not even by data dependencies. See the documentation for
* memory_barrier() for examples and URLs to more information.
*
* For example, the following code would force ordering (the initial
* value of "a" is zero, "b" is one, and "p" is "&a"):
*
* <programlisting>
* CPU 0 CPU 1
*
* b = 2;
* memory_barrier();
* p = &b; q = p;
* read_barrier_depends();
* d = *q;
* </programlisting>
*
* because the read of "*q" depends on the read of "p" and these
* two reads are separated by a read_barrier_depends(). However,
* the following code, with the same initial values for "a" and "b":
*
* <programlisting>
* CPU 0 CPU 1
*
* a = 2;
* memory_barrier();
* b = 3; y = b;
* read_barrier_depends();
* x = a;
* </programlisting>
*
* does not enforce ordering, since there is no data dependency between
* the read of "a" and the read of "b". Therefore, on some CPUs, such
* as Alpha, "y" could be set to 3 and "x" to 0. Use rmb()
* in cases like this where there are no data dependencies.
*/
#define read_barrier_depends() __asm__ __volatile__("mb": : :"memory")
#define __smp_load_acquire(p) \
({ \
compiletime_assert_atomic_type(*p); \
__READ_ONCE(*p); \
})
#ifdef CONFIG_SMP
#define __ASM_SMP_MB "\tmb\n"

10
arch/alpha/include/asm/pgtable.h
View File

@ -277,9 +277,9 @@ extern inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= __DIRTY_BITS; retur
extern inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= __ACCESS_BITS; return pte; }
/*
* The smp_read_barrier_depends() in the following functions are required to
* order the load of *dir (the pointer in the top level page table) with any
* subsequent load of the returned pmd_t *ret (ret is data dependent on *dir).
* The smp_rmb() in the following functions are required to order the load of
* *dir (the pointer in the top level page table) with any subsequent load of
* the returned pmd_t *ret (ret is data dependent on *dir).
*
* If this ordering is not enforced, the CPU might load an older value of
* *ret, which may be uninitialized data. See mm/memory.c:__pte_alloc for
@ -293,7 +293,7 @@ extern inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= __ACCESS_BITS; retu
extern inline pmd_t * pmd_offset(pud_t * dir, unsigned long address)
{
pmd_t *ret = (pmd_t *) pud_page_vaddr(*dir) + ((address >> PMD_SHIFT) & (PTRS_PER_PAGE - 1));
smp_read_barrier_depends(); /* see above */
smp_rmb(); /* see above */
return ret;
}
#define pmd_offset pmd_offset
@ -303,7 +303,7 @@ extern inline pte_t * pte_offset_kernel(pmd_t * dir, unsigned long address)
{
pte_t *ret = (pte_t *) pmd_page_vaddr(*dir)
+ ((address >> PAGE_SHIFT) & (PTRS_PER_PAGE - 1));
smp_read_barrier_depends(); /* see above */
smp_rmb(); /* see above */
return ret;
}
#define pte_offset_kernel pte_offset_kernel

35
arch/alpha/include/asm/rwonce.h Normal file
View File

@ -0,0 +1,35 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019 Google LLC.
*/
#ifndef __ASM_RWONCE_H
#define __ASM_RWONCE_H
#ifdef CONFIG_SMP
#include <asm/barrier.h>
/*
* Alpha is apparently daft enough to reorder address-dependent loads
* on some CPU implementations. Knock some common sense into it with
* a memory barrier in READ_ONCE().
*
* For the curious, more information about this unusual reordering is
* available in chapter 15 of the "perfbook":
*
* https://kernel.org/pub/linux/kernel/people/paulmck/perfbook/perfbook.html
*
*/
#define __READ_ONCE(x) \
({ \
__unqual_scalar_typeof(x) __x = \
(*(volatile typeof(__x) *)(&(x))); \
mb(); \
(typeof(x))__x; \
})
#endif /* CONFIG_SMP */
#include <asm-generic/rwonce.h>
#endif /* __ASM_RWONCE_H */

1
arch/arm/include/asm/vdso/gettimeofday.h
View File

@ -7,6 +7,7 @@
#ifndef __ASSEMBLY__
#include <asm/barrier.h>
#include <asm/errno.h>
#include <asm/unistd.h>
#include <asm/vdso/cp15.h>

23
arch/arm64/Kconfig
View File

@ -118,6 +118,7 @@ config ARM64
select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL
select GENERIC_GETTIMEOFDAY
select GENERIC_VDSO_TIME_NS
select HANDLE_DOMAIN_IRQ
select HARDIRQS_SW_RESEND
select HAVE_PCI
@ -1327,6 +1328,8 @@ config SWP_EMULATION
ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that
they are always undefined. Say Y here to enable software
emulation of these instructions for userspace using LDXR/STXR.
This feature can be controlled at runtime with the abi.swp
sysctl which is disabled by default.
In some older versions of glibc [<=2.8] SWP is used during futex
trylock() operations with the assumption that the code will not
@ -1353,7 +1356,8 @@ config CP15_BARRIER_EMULATION
Say Y here to enable software emulation of these
instructions for AArch32 userspace code. When this option is
enabled, CP15 barrier usage is traced which can help
identify software that needs updating.
identify software that needs updating. This feature can be
controlled at runtime with the abi.cp15_barrier sysctl.
If unsure, say Y
@ -1364,7 +1368,8 @@ config SETEND_EMULATION
AArch32 EL0, and is deprecated in ARMv8.
Say Y here to enable software emulation of the instruction
for AArch32 userspace code.
for AArch32 userspace code. This feature can be controlled
at runtime with the abi.setend sysctl.
Note: All the cpus on the system must have mixed endian support at EL0
for this feature to be enabled. If a new CPU - which doesn't support mixed
@ -1596,6 +1601,20 @@ config ARM64_AMU_EXTN
correctly reflect reality. Most commonly, the value read will be 0,
indicating that the counter is not enabled.
config AS_HAS_ARMV8_4
def_bool $(cc-option,-Wa$(comma)-march=armv8.4-a)
config ARM64_TLB_RANGE
bool "Enable support for tlbi range feature"
default y
depends on AS_HAS_ARMV8_4
help
ARMv8.4-TLBI provides TLBI invalidation instruction that apply to a
range of input addresses.
The feature introduces new assembly instructions, and they were
support when binutils >= 2.30.
endmenu
menu "ARMv8.5 architectural features"

7
arch/arm64/Makefile
View File

@ -82,11 +82,18 @@ endif
# compiler to generate them and consequently to break the single image contract
# we pass it only to the assembler. This option is utilized only in case of non
# integrated assemblers.
ifneq ($(CONFIG_AS_HAS_ARMV8_4), y)
branch-prot-flags-$(CONFIG_AS_HAS_PAC) += -Wa,-march=armv8.3-a
endif
endif
KBUILD_CFLAGS += $(branch-prot-flags-y)
ifeq ($(CONFIG_AS_HAS_ARMV8_4), y)
# make sure to pass the newest target architecture to -march.
KBUILD_CFLAGS += -Wa,-march=armv8.4-a
endif
ifeq ($(CONFIG_SHADOW_CALL_STACK), y)
KBUILD_CFLAGS += -ffixed-x18
endif

1
arch/arm64/configs/defconfig
View File

@ -66,6 +66,7 @@ CONFIG_SCHED_SMT=y
CONFIG_NUMA=y
CONFIG_SECCOMP=y
CONFIG_KEXEC=y
CONFIG_KEXEC_FILE=y
CONFIG_CRASH_DUMP=y
CONFIG_XEN=y
CONFIG_COMPAT=y

15
arch/arm64/include/asm/acpi.h
View File

@ -47,20 +47,7 @@
pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
/* ACPI table mapping after acpi_permanent_mmap is set */
static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
acpi_size size)
{
/* For normal memory we already have a cacheable mapping. */
if (memblock_is_map_memory(phys))
return (void __iomem *)__phys_to_virt(phys);
/*
* We should still honor the memory's attribute here because
* crash dump kernel possibly excludes some ACPI (reclaim)
* regions from memblock list.
*/
return __ioremap(phys, size, __acpi_get_mem_attribute(phys));
}
void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
#define acpi_os_ioremap acpi_os_ioremap
typedef u64 phys_cpuid_t;

4
arch/arm64/include/asm/cpucaps.h
View File

@ -62,7 +62,9 @@
#define ARM64_HAS_GENERIC_AUTH 52
#define ARM64_HAS_32BIT_EL1 53
#define ARM64_BTI 54
#define ARM64_HAS_ARMv8_4_TTL 55
#define ARM64_HAS_TLB_RANGE 56
#define ARM64_NCAPS 55
#define ARM64_NCAPS 57
#endif /* __ASM_CPUCAPS_H */

7
arch/arm64/include/asm/cpufeature.h
View File

@ -692,6 +692,12 @@ static inline bool system_supports_bti(void)
return IS_ENABLED(CONFIG_ARM64_BTI) && cpus_have_const_cap(ARM64_BTI);
}
static inline bool system_supports_tlb_range(void)
{
return IS_ENABLED(CONFIG_ARM64_TLB_RANGE) &&
cpus_have_const_cap(ARM64_HAS_TLB_RANGE);
}
#define ARM64_BP_HARDEN_UNKNOWN -1
#define ARM64_BP_HARDEN_WA_NEEDED 0
#define ARM64_BP_HARDEN_NOT_REQUIRED 1
@ -774,6 +780,7 @@ static inline unsigned int get_vmid_bits(u64 mmfr1)
}
u32 get_kvm_ipa_limit(void);
void dump_cpu_features(void);
#endif /* __ASSEMBLY__ */

2
arch/arm64/include/asm/hugetlb.h
View File

@ -49,6 +49,8 @@ extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, unsigned long sz);
#define set_huge_swap_pte_at set_huge_swap_pte_at
void __init arm64_hugetlb_cma_reserve(void);
#include <asm-generic/hugetlb.h>
#endif /* __ASM_HUGETLB_H */

1
arch/arm64/include/asm/hwcap.h
View File

@ -95,6 +95,7 @@
#define KERNEL_HWCAP_DGH __khwcap2_feature(DGH)
#define KERNEL_HWCAP_RNG __khwcap2_feature(RNG)
#define KERNEL_HWCAP_BTI __khwcap2_feature(BTI)
/* reserved for KERNEL_HWCAP_MTE __khwcap2_feature(MTE) */
/*
* This yields a mask that user programs can use to figure out what

2
arch/arm64/include/asm/kernel-pgtable.h
View File

@ -8,7 +8,7 @@
#ifndef __ASM_KERNEL_PGTABLE_H
#define __ASM_KERNEL_PGTABLE_H
#include <linux/pgtable.h>
#include <asm/pgtable-hwdef.h>
#include <asm/sparsemem.h>
/*

12
arch/arm64/include/asm/memory.h
View File

@ -10,11 +10,8 @@
#ifndef __ASM_MEMORY_H
#define __ASM_MEMORY_H
#include <linux/compiler.h>
#include <linux/const.h>
#include <linux/sizes.h>
#include <linux/types.h>
#include <asm/bug.h>
#include <asm/page-def.h>
/*
@ -157,11 +154,15 @@
#endif
#ifndef __ASSEMBLY__
extern u64 vabits_actual;
#define PAGE_END (_PAGE_END(vabits_actual))
#include <linux/bitops.h>
#include <linux/compiler.h>
#include <linux/mmdebug.h>
#include <linux/types.h>
#include <asm/bug.h>
extern u64 vabits_actual;
#define PAGE_END (_PAGE_END(vabits_actual))
extern s64 physvirt_offset;
extern s64 memstart_addr;
@ -322,6 +323,7 @@ static inline void *phys_to_virt(phys_addr_t x)
__is_lm_address(__addr) && pfn_valid(virt_to_pfn(__addr)); \
})
void dump_mem_limit(void);
#endif /* !ASSEMBLY */
/*

6
arch/arm64/include/asm/mmu_context.h
View File

@ -175,7 +175,7 @@ static inline void cpu_replace_ttbr1(pgd_t *pgdp)
* take CPU migration into account.
*/
#define destroy_context(mm) do { } while(0)
void check_and_switch_context(struct mm_struct *mm, unsigned int cpu);
void check_and_switch_context(struct mm_struct *mm);
#define init_new_context(tsk,mm) ({ atomic64_set(&(mm)->context.id, 0); 0; })
@ -214,8 +214,6 @@ enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
static inline void __switch_mm(struct mm_struct *next)
{
unsigned int cpu = smp_processor_id();
/*
* init_mm.pgd does not contain any user mappings and it is always
* active for kernel addresses in TTBR1. Just set the reserved TTBR0.
@ -225,7 +223,7 @@ static inline void __switch_mm(struct mm_struct *next)
return;
}
check_and_switch_context(next, cpu);
check_and_switch_context(next);
}
static inline void

27
arch/arm64/include/asm/perf_event.h
View File

@ -72,6 +72,13 @@
#define ARMV8_PMUV3_PERFCTR_LL_CACHE_RD 0x36
#define ARMV8_PMUV3_PERFCTR_LL_CACHE_MISS_RD 0x37
#define ARMV8_PMUV3_PERFCTR_REMOTE_ACCESS_RD 0x38
#define ARMV8_PMUV3_PERFCTR_L1D_CACHE_LMISS_RD 0x39
#define ARMV8_PMUV3_PERFCTR_OP_RETIRED 0x3A
#define ARMV8_PMUV3_PERFCTR_OP_SPEC 0x3B
#define ARMV8_PMUV3_PERFCTR_STALL 0x3C
#define ARMV8_PMUV3_PERFCTR_STALL_SLOT_BACKEND 0x3D
#define ARMV8_PMUV3_PERFCTR_STALL_SLOT_FRONTEND 0x3E
#define ARMV8_PMUV3_PERFCTR_STALL_SLOT 0x3F
/* Statistical profiling extension microarchitectural events */
#define ARMV8_SPE_PERFCTR_SAMPLE_POP 0x4000
@ -79,6 +86,26 @@
#define ARMV8_SPE_PERFCTR_SAMPLE_FILTRATE 0x4002
#define ARMV8_SPE_PERFCTR_SAMPLE_COLLISION 0x4003
/* AMUv1 architecture events */
#define ARMV8_AMU_PERFCTR_CNT_CYCLES 0x4004
#define ARMV8_AMU_PERFCTR_STALL_BACKEND_MEM 0x4005
/* long-latency read miss events */
#define ARMV8_PMUV3_PERFCTR_L1I_CACHE_LMISS 0x4006
#define ARMV8_PMUV3_PERFCTR_L2D_CACHE_LMISS_RD 0x4009
#define ARMV8_PMUV3_PERFCTR_L2I_CACHE_LMISS 0x400A
#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_LMISS_RD 0x400B
/* additional latency from alignment events */
#define ARMV8_PMUV3_PERFCTR_LDST_ALIGN_LAT 0x4020
#define ARMV8_PMUV3_PERFCTR_LD_ALIGN_LAT 0x4021
#define ARMV8_PMUV3_PERFCTR_ST_ALIGN_LAT 0x4022
/* Armv8.5 Memory Tagging Extension events */
#define ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED 0x4024
#define ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED_RD 0x4025
#define ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED_WR 0x4026
/* ARMv8 recommended implementation defined event types */
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD 0x40
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR 0x41

23
arch/arm64/include/asm/pgtable-hwdef.h
View File

@ -29,7 +29,7 @@
* Size mapped by an entry at level n ( 0 <= n <= 3)
* We map (PAGE_SHIFT - 3) at all translation levels and PAGE_SHIFT bits
* in the final page. The maximum number of translation levels supported by
* the architecture is 4. Hence, starting at at level n, we have further
* the architecture is 4. Hence, starting at level n, we have further
* ((4 - n) - 1) levels of translation excluding the offset within the page.
* So, the total number of bits mapped by an entry at level n is :
*
@ -82,23 +82,23 @@
* Contiguous page definitions.
*/
#ifdef CONFIG_ARM64_64K_PAGES
#define CONT_PTE_SHIFT 5
#define CONT_PMD_SHIFT 5
#define CONT_PTE_SHIFT (5 + PAGE_SHIFT)
#define CONT_PMD_SHIFT (5 + PMD_SHIFT)
#elif defined(CONFIG_ARM64_16K_PAGES)
#define CONT_PTE_SHIFT 7
#define CONT_PMD_SHIFT 5
#define CONT_PTE_SHIFT (7 + PAGE_SHIFT)
#define CONT_PMD_SHIFT (5 + PMD_SHIFT)
#else
#define CONT_PTE_SHIFT 4
#define CONT_PMD_SHIFT 4
#define CONT_PTE_SHIFT (4 + PAGE_SHIFT)
#define CONT_PMD_SHIFT (4 + PMD_SHIFT)
#endif
#define CONT_PTES (1 << CONT_PTE_SHIFT)
#define CONT_PTES (1 << (CONT_PTE_SHIFT - PAGE_SHIFT))
#define CONT_PTE_SIZE (CONT_PTES * PAGE_SIZE)
#define CONT_PTE_MASK (~(CONT_PTE_SIZE - 1))
#define CONT_PMDS (1 << CONT_PMD_SHIFT)
#define CONT_PMDS (1 << (CONT_PMD_SHIFT - PMD_SHIFT))
#define CONT_PMD_SIZE (CONT_PMDS * PMD_SIZE)
#define CONT_PMD_MASK (~(CONT_PMD_SIZE - 1))
/* the the numerical offset of the PTE within a range of CONT_PTES */
/* the numerical offset of the PTE within a range of CONT_PTES */
#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_PTES-1))
/*
@ -178,10 +178,12 @@
#define PTE_S2_RDONLY (_AT(pteval_t, 1) << 6) /* HAP[2:1] */
#define PTE_S2_RDWR (_AT(pteval_t, 3) << 6) /* HAP[2:1] */
#define PTE_S2_XN (_AT(pteval_t, 2) << 53) /* XN[1:0] */
#define PTE_S2_SW_RESVD (_AT(pteval_t, 15) << 55) /* Reserved for SW */
#define PMD_S2_RDONLY (_AT(pmdval_t, 1) << 6) /* HAP[2:1] */
#define PMD_S2_RDWR (_AT(pmdval_t, 3) << 6) /* HAP[2:1] */
#define PMD_S2_XN (_AT(pmdval_t, 2) << 53) /* XN[1:0] */
#define PMD_S2_SW_RESVD (_AT(pmdval_t, 15) << 55) /* Reserved for SW */
#define PUD_S2_RDONLY (_AT(pudval_t, 1) << 6) /* HAP[2:1] */
#define PUD_S2_RDWR (_AT(pudval_t, 3) << 6) /* HAP[2:1] */
@ -216,6 +218,7 @@
#define TCR_TxSZ(x) (TCR_T0SZ(x) | TCR_T1SZ(x))
#define TCR_TxSZ_WIDTH 6
#define TCR_T0SZ_MASK (((UL(1) << TCR_TxSZ_WIDTH) - 1) << TCR_T0SZ_OFFSET)
#define TCR_T1SZ_MASK (((UL(1) << TCR_TxSZ_WIDTH) - 1) << TCR_T1SZ_OFFSET)
#define TCR_EPD0_SHIFT 7
#define TCR_EPD0_MASK (UL(1) << TCR_EPD0_SHIFT)

10
arch/arm64/include/asm/pgtable.h
View File

@ -40,6 +40,16 @@ extern void __pmd_error(const char *file, int line, unsigned long val);
extern void __pud_error(const char *file, int line, unsigned long val);
extern void __pgd_error(const char *file, int line, unsigned long val);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
/* Set stride and tlb_level in flush_*_tlb_range */
#define flush_pmd_tlb_range(vma, addr, end) \
__flush_tlb_range(vma, addr, end, PMD_SIZE, false, 2)
#define flush_pud_tlb_range(vma, addr, end) \
__flush_tlb_range(vma, addr, end, PUD_SIZE, false, 1)
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
/*
* ZERO_PAGE is a global shared page that is always zero: used
* for zero-mapped memory areas etc..

2
arch/arm64/include/asm/ptrace.h
View File

@ -27,7 +27,7 @@
*
* Some code sections either automatically switch back to PSR.I or explicitly
* require to not use priority masking. If bit GIC_PRIO_PSR_I_SET is included
* in the the priority mask, it indicates that PSR.I should be set and
* in the priority mask, it indicates that PSR.I should be set and
* interrupt disabling temporarily does not rely on IRQ priorities.
*/
#define GIC_PRIO_IRQON 0xe0

9
arch/arm64/include/asm/stage2_pgtable.h
View File

@ -256,4 +256,13 @@ stage2_pgd_addr_end(struct kvm *kvm, phys_addr_t addr, phys_addr_t end)
return (boundary - 1 < end - 1) ? boundary : end;
}
/*
* Level values for the ARMv8.4-TTL extension, mapping PUD/PMD/PTE and
* the architectural page-table level.
*/
#define S2_NO_LEVEL_HINT 0
#define S2_PUD_LEVEL 1
#define S2_PMD_LEVEL 2
#define S2_PTE_LEVEL 3
#endif /* __ARM64_S2_PGTABLE_H_ */

49
arch/arm64/include/asm/sysreg.h
View File

@ -421,9 +421,9 @@
*/
#define SYS_AMEVCNTR0_EL0(n) SYS_AM_EL0(4 + ((n) >> 3), (n) & 7)
#define SYS_AMEVTYPE0_EL0(n) SYS_AM_EL0(6 + ((n) >> 3), (n) & 7)
#define SYS_AMEVTYPER0_EL0(n) SYS_AM_EL0(6 + ((n) >> 3), (n) & 7)
#define SYS_AMEVCNTR1_EL0(n) SYS_AM_EL0(12 + ((n) >> 3), (n) & 7)
#define SYS_AMEVTYPE1_EL0(n) SYS_AM_EL0(14 + ((n) >> 3), (n) & 7)
#define SYS_AMEVTYPER1_EL0(n) SYS_AM_EL0(14 + ((n) >> 3), (n) & 7)
/* AMU v1: Fixed (architecturally defined) activity monitors */
#define SYS_AMEVCNTR0_CORE_EL0 SYS_AMEVCNTR0_EL0(0)
@ -617,6 +617,9 @@
#define ID_AA64ISAR0_SHA1_SHIFT 8
#define ID_AA64ISAR0_AES_SHIFT 4
#define ID_AA64ISAR0_TLB_RANGE_NI 0x0
#define ID_AA64ISAR0_TLB_RANGE 0x2
/* id_aa64isar1 */
#define ID_AA64ISAR1_I8MM_SHIFT 52
#define ID_AA64ISAR1_DGH_SHIFT 48
@ -706,6 +709,9 @@
#define ID_AA64ZFR0_SVEVER_SVE2 0x1
/* id_aa64mmfr0 */
#define ID_AA64MMFR0_ECV_SHIFT 60
#define ID_AA64MMFR0_FGT_SHIFT 56
#define ID_AA64MMFR0_EXS_SHIFT 44
#define ID_AA64MMFR0_TGRAN4_2_SHIFT 40
#define ID_AA64MMFR0_TGRAN64_2_SHIFT 36
#define ID_AA64MMFR0_TGRAN16_2_SHIFT 32
@ -734,6 +740,10 @@
#endif
/* id_aa64mmfr1 */
#define ID_AA64MMFR1_ETS_SHIFT 36
#define ID_AA64MMFR1_TWED_SHIFT 32
#define ID_AA64MMFR1_XNX_SHIFT 28
#define ID_AA64MMFR1_SPECSEI_SHIFT 24
#define ID_AA64MMFR1_PAN_SHIFT 20
#define ID_AA64MMFR1_LOR_SHIFT 16
#define ID_AA64MMFR1_HPD_SHIFT 12
@ -746,8 +756,15 @@
/* id_aa64mmfr2 */
#define ID_AA64MMFR2_E0PD_SHIFT 60
#define ID_AA64MMFR2_EVT_SHIFT 56
#define ID_AA64MMFR2_BBM_SHIFT 52
#define ID_AA64MMFR2_TTL_SHIFT 48
#define ID_AA64MMFR2_FWB_SHIFT 40
#define ID_AA64MMFR2_IDS_SHIFT 36
#define ID_AA64MMFR2_AT_SHIFT 32
#define ID_AA64MMFR2_ST_SHIFT 28
#define ID_AA64MMFR2_NV_SHIFT 24
#define ID_AA64MMFR2_CCIDX_SHIFT 20
#define ID_AA64MMFR2_LVA_SHIFT 16
#define ID_AA64MMFR2_IESB_SHIFT 12
#define ID_AA64MMFR2_LSM_SHIFT 8
@ -755,6 +772,7 @@
#define ID_AA64MMFR2_CNP_SHIFT 0
/* id_aa64dfr0 */
#define ID_AA64DFR0_DOUBLELOCK_SHIFT 36
#define ID_AA64DFR0_PMSVER_SHIFT 32
#define ID_AA64DFR0_CTX_CMPS_SHIFT 28
#define ID_AA64DFR0_WRPS_SHIFT 20
@ -807,18 +825,40 @@
#define ID_ISAR6_DP_SHIFT 4
#define ID_ISAR6_JSCVT_SHIFT 0
#define ID_MMFR0_INNERSHR_SHIFT 28
#define ID_MMFR0_FCSE_SHIFT 24
#define ID_MMFR0_AUXREG_SHIFT 20
#define ID_MMFR0_TCM_SHIFT 16
#define ID_MMFR0_SHARELVL_SHIFT 12
#define ID_MMFR0_OUTERSHR_SHIFT 8
#define ID_MMFR0_PMSA_SHIFT 4
#define ID_MMFR0_VMSA_SHIFT 0
#define ID_MMFR4_EVT_SHIFT 28
#define ID_MMFR4_CCIDX_SHIFT 24
#define ID_MMFR4_LSM_SHIFT 20
#define ID_MMFR4_HPDS_SHIFT 16
#define ID_MMFR4_CNP_SHIFT 12
#define ID_MMFR4_XNX_SHIFT 8
#define ID_MMFR4_AC2_SHIFT 4
#define ID_MMFR4_SPECSEI_SHIFT 0
#define ID_MMFR5_ETS_SHIFT 0
#define ID_PFR0_DIT_SHIFT 24
#define ID_PFR0_CSV2_SHIFT 16
#define ID_PFR0_STATE3_SHIFT 12
#define ID_PFR0_STATE2_SHIFT 8
#define ID_PFR0_STATE1_SHIFT 4
#define ID_PFR0_STATE0_SHIFT 0
#define ID_DFR0_PERFMON_SHIFT 24
#define ID_DFR0_MPROFDBG_SHIFT 20
#define ID_DFR0_MMAPTRC_SHIFT 16
#define ID_DFR0_COPTRC_SHIFT 12
#define ID_DFR0_MMAPDBG_SHIFT 8
#define ID_DFR0_COPSDBG_SHIFT 4
#define ID_DFR0_COPDBG_SHIFT 0
#define ID_PFR2_SSBS_SHIFT 4
#define ID_PFR2_CSV3_SHIFT 0
@ -861,6 +901,11 @@
#define ID_AA64MMFR0_TGRAN_SUPPORTED ID_AA64MMFR0_TGRAN64_SUPPORTED
#endif
#define MVFR2_FPMISC_SHIFT 4
#define MVFR2_SIMDMISC_SHIFT 0
#define DCZID_DZP_SHIFT 4
#define DCZID_BS_SHIFT 0
/*
* The ZCR_ELx_LEN_* definitions intentionally include bits [8:4] which

29
arch/arm64/include/asm/tlb.h
View File

@ -21,11 +21,37 @@ static void tlb_flush(struct mmu_gather *tlb);
#include <asm-generic/tlb.h>
/*
* get the tlbi levels in arm64. Default value is 0 if more than one
* of cleared_* is set or neither is set.
* Arm64 doesn't support p4ds now.
*/
static inline int tlb_get_level(struct mmu_gather *tlb)
{
if (tlb->cleared_ptes && !(tlb->cleared_pmds ||
tlb->cleared_puds ||
tlb->cleared_p4ds))
return 3;
if (tlb->cleared_pmds && !(tlb->cleared_ptes ||
tlb->cleared_puds ||
tlb->cleared_p4ds))
return 2;
if (tlb->cleared_puds && !(tlb->cleared_ptes ||
tlb->cleared_pmds ||
tlb->cleared_p4ds))
return 1;
return 0;
}
static inline void tlb_flush(struct mmu_gather *tlb)
{
struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0);
bool last_level = !tlb->freed_tables;
unsigned long stride = tlb_get_unmap_size(tlb);
int tlb_level = tlb_get_level(tlb);
/*
* If we're tearing down the address space then we only care about
@ -38,7 +64,8 @@ static inline void tlb_flush(struct mmu_gather *tlb)
return;
}
__flush_tlb_range(&vma, tlb->start, tlb->end, stride, last_level);
__flush_tlb_range(&vma, tlb->start, tlb->end, stride,
last_level, tlb_level);
}
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,

179
arch/arm64/include/asm/tlbflush.h
View File

@ -10,6 +10,7 @@
#ifndef __ASSEMBLY__
#include <linux/bitfield.h>
#include <linux/mm_types.h>
#include <linux/sched.h>
#include <asm/cputype.h>
@ -59,6 +60,102 @@
__ta; \
})
/*
* Get translation granule of the system, which is decided by
* PAGE_SIZE. Used by TTL.
* - 4KB : 1
* - 16KB : 2
* - 64KB : 3
*/
#define TLBI_TTL_TG_4K 1
#define TLBI_TTL_TG_16K 2
#define TLBI_TTL_TG_64K 3
static inline unsigned long get_trans_granule(void)
{
switch (PAGE_SIZE) {
case SZ_4K:
return TLBI_TTL_TG_4K;
case SZ_16K:
return TLBI_TTL_TG_16K;
case SZ_64K:
return TLBI_TTL_TG_64K;
default:
return 0;
}
}
/*
* Level-based TLBI operations.
*
* When ARMv8.4-TTL exists, TLBI operations take an additional hint for
* the level at which the invalidation must take place. If the level is
* wrong, no invalidation may take place. In the case where the level
* cannot be easily determined, a 0 value for the level parameter will
* perform a non-hinted invalidation.
*
* For Stage-2 invalidation, use the level values provided to that effect
* in asm/stage2_pgtable.h.
*/
#define TLBI_TTL_MASK GENMASK_ULL(47, 44)
#define __tlbi_level(op, addr, level) do { \
u64 arg = addr; \
\
if (cpus_have_const_cap(ARM64_HAS_ARMv8_4_TTL) && \
level) { \
u64 ttl = level & 3; \
ttl |= get_trans_granule() << 2; \
arg &= ~TLBI_TTL_MASK; \
arg |= FIELD_PREP(TLBI_TTL_MASK, ttl); \
} \
\
__tlbi(op, arg); \
} while(0)
#define __tlbi_user_level(op, arg, level) do { \
if (arm64_kernel_unmapped_at_el0()) \
__tlbi_level(op, (arg | USER_ASID_FLAG), level); \
} while (0)
/*
* This macro creates a properly formatted VA operand for the TLB RANGE.
* The value bit assignments are:
*
* +----------+------+-------+-------+-------+----------------------+
* | ASID | TG | SCALE | NUM | TTL | BADDR |
* +-----------------+-------+-------+-------+----------------------+
* |63 48|47 46|45 44|43 39|38 37|36 0|
*
* The address range is determined by below formula:
* [BADDR, BADDR + (NUM + 1) * 2^(5*SCALE + 1) * PAGESIZE)
*
*/
#define __TLBI_VADDR_RANGE(addr, asid, scale, num, ttl) \
({ \
unsigned long __ta = (addr) >> PAGE_SHIFT; \
__ta &= GENMASK_ULL(36, 0); \
__ta |= (unsigned long)(ttl) << 37; \
__ta |= (unsigned long)(num) << 39; \
__ta |= (unsigned long)(scale) << 44; \
__ta |= get_trans_granule() << 46; \
__ta |= (unsigned long)(asid) << 48; \
__ta; \
})
/* These macros are used by the TLBI RANGE feature. */
#define __TLBI_RANGE_PAGES(num, scale) \
((unsigned long)((num) + 1) << (5 * (scale) + 1))
#define MAX_TLBI_RANGE_PAGES __TLBI_RANGE_PAGES(31, 3)
/*
* Generate 'num' values from -1 to 30 with -1 rejected by the
* __flush_tlb_range() loop below.
*/
#define TLBI_RANGE_MASK GENMASK_ULL(4, 0)
#define __TLBI_RANGE_NUM(pages, scale) \
((((pages) >> (5 * (scale) + 1)) & TLBI_RANGE_MASK) - 1)
/*
* TLB Invalidation
* ================
@ -179,34 +276,83 @@ static inline void flush_tlb_page(struct vm_area_struct *vma,
static inline void __flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end,
unsigned long stride, bool last_level)
unsigned long stride, bool last_level,
int tlb_level)
{
int num = 0;
int scale = 0;
unsigned long asid = ASID(vma->vm_mm);
unsigned long addr;
unsigned long pages;
start = round_down(start, stride);
end = round_up(end, stride);
pages = (end - start) >> PAGE_SHIFT;
if ((end - start) >= (MAX_TLBI_OPS * stride)) {
/*
* When not uses TLB range ops, we can handle up to
* (MAX_TLBI_OPS - 1) pages;
* When uses TLB range ops, we can handle up to
* (MAX_TLBI_RANGE_PAGES - 1) pages.
*/
if ((!system_supports_tlb_range() &&
(end - start) >= (MAX_TLBI_OPS * stride)) ||
pages >= MAX_TLBI_RANGE_PAGES) {
flush_tlb_mm(vma->vm_mm);
return;
}
/* Convert the stride into units of 4k */
stride >>= 12;
start = __TLBI_VADDR(start, asid);
end = __TLBI_VADDR(end, asid);
dsb(ishst);
for (addr = start; addr < end; addr += stride) {
if (last_level) {
__tlbi(vale1is, addr);
__tlbi_user(vale1is, addr);
} else {
__tlbi(vae1is, addr);
__tlbi_user(vae1is, addr);
/*
* When the CPU does not support TLB range operations, flush the TLB
* entries one by one at the granularity of 'stride'. If the the TLB
* range ops are supported, then:
*
* 1. If 'pages' is odd, flush the first page through non-range
* operations;
*
* 2. For remaining pages: the minimum range granularity is decided
* by 'scale', so multiple range TLBI operations may be required.
* Start from scale = 0, flush the corresponding number of pages
* ((num+1)*2^(5*scale+1) starting from 'addr'), then increase it
* until no pages left.
*
* Note that certain ranges can be represented by either num = 31 and
* scale or num = 0 and scale + 1. The loop below favours the latter
* since num is limited to 30 by the __TLBI_RANGE_NUM() macro.
*/
while (pages > 0) {
if (!system_supports_tlb_range() ||
pages % 2 == 1) {
addr = __TLBI_VADDR(start, asid);
if (last_level) {
__tlbi_level(vale1is, addr, tlb_level);
__tlbi_user_level(vale1is, addr, tlb_level);
} else {
__tlbi_level(vae1is, addr, tlb_level);
__tlbi_user_level(vae1is, addr, tlb_level);
}
start += stride;
pages -= stride >> PAGE_SHIFT;
continue;
}
num = __TLBI_RANGE_NUM(pages, scale);
if (num >= 0) {
addr = __TLBI_VADDR_RANGE(start, asid, scale,
num, tlb_level);
if (last_level) {
__tlbi(rvale1is, addr);
__tlbi_user(rvale1is, addr);
} else {
__tlbi(rvae1is, addr);
__tlbi_user(rvae1is, addr);
}
start += __TLBI_RANGE_PAGES(num, scale) << PAGE_SHIFT;
pages -= __TLBI_RANGE_PAGES(num, scale);
}
scale++;
}
dsb(ish);
}
@ -217,8 +363,9 @@ static inline void flush_tlb_range(struct vm_area_struct *vma,
/*
* We cannot use leaf-only invalidation here, since we may be invalidating
* table entries as part of collapsing hugepages or moving page tables.
* Set the tlb_level to 0 because we can not get enough information here.
*/
__flush_tlb_range(vma, start, end, PAGE_SIZE, false);
__flush_tlb_range(vma, start, end, PAGE_SIZE, false, 0);
}
static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)

1
arch/arm64/include/asm/uaccess.h
View File

@ -19,6 +19,7 @@
#include <linux/string.h>
#include <asm/cpufeature.h>
#include <asm/mmu.h>
#include <asm/ptrace.h>
#include <asm/memory.h>
#include <asm/extable.h>

2
arch/arm64/include/asm/vdso.h
View File

@ -12,6 +12,8 @@
*/
#define VDSO_LBASE 0x0
#define __VVAR_PAGES 2
#ifndef __ASSEMBLY__
#include <generated/vdso-offsets.h>

13
arch/arm64/include/asm/vdso/compat_gettimeofday.h
View File

@ -7,6 +7,7 @@
#ifndef __ASSEMBLY__
#include <asm/barrier.h>
#include <asm/unistd.h>
#include <asm/errno.h>
@ -152,6 +153,18 @@ static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
return ret;
}
#ifdef CONFIG_TIME_NS
static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
{
const struct vdso_data *ret;
/* See __arch_get_vdso_data(). */
asm volatile("mov %0, %1" : "=r"(ret) : "r"(_timens_data));
return ret;
}
#endif
static inline bool vdso_clocksource_ok(const struct vdso_data *vd)
{
return vd->clock_mode == VDSO_CLOCKMODE_ARCHTIMER;

9
arch/arm64/include/asm/vdso/gettimeofday.h
View File

@ -7,6 +7,7 @@
#ifndef __ASSEMBLY__
#include <asm/barrier.h>
#include <asm/unistd.h>
#define VDSO_HAS_CLOCK_GETRES 1
@ -96,6 +97,14 @@ const struct vdso_data *__arch_get_vdso_data(void)
return _vdso_data;
}
#ifdef CONFIG_TIME_NS
static __always_inline
const struct vdso_data *__arch_get_timens_vdso_data(void)
{
return _timens_data;
}
#endif
#endif /* !__ASSEMBLY__ */
#endif /* __ASM_VDSO_GETTIMEOFDAY_H */

1
arch/arm64/include/uapi/asm/hwcap.h
View File

@ -74,5 +74,6 @@
#define HWCAP2_DGH (1 << 15)
#define HWCAP2_RNG (1 << 16)
#define HWCAP2_BTI (1 << 17)
/* reserved for HWCAP2_MTE (1 << 18) */
#endif /* _UAPI__ASM_HWCAP_H */

2
arch/arm64/include/uapi/asm/sigcontext.h
View File

@ -179,7 +179,7 @@ struct sve_context {
* The same convention applies when returning from a signal: a caller
* will need to remove or resize the sve_context block if it wants to
* make the SVE registers live when they were previously non-live or
* vice-versa. This may require the the caller to allocate fresh
* vice-versa. This may require the caller to allocate fresh
* memory and/or move other context blocks in the signal frame.
*
* Changing the vector length during signal return is not permitted:

75
arch/arm64/kernel/acpi.c
View File

@ -261,6 +261,81 @@ pgprot_t __acpi_get_mem_attribute(phys_addr_t addr)
return __pgprot(PROT_DEVICE_nGnRnE);
}
void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
{
efi_memory_desc_t *md, *region = NULL;
pgprot_t prot;
if (WARN_ON_ONCE(!efi_enabled(EFI_MEMMAP)))
return NULL;
for_each_efi_memory_desc(md) {
u64 end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
if (phys < md->phys_addr || phys >= end)
continue;
if (phys + size > end) {
pr_warn(FW_BUG "requested region covers multiple EFI memory regions\n");
return NULL;
}
region = md;
break;
}
/*
* It is fine for AML to remap regions that are not represented in the
* EFI memory map at all, as it only describes normal memory, and MMIO
* regions that require a virtual mapping to make them accessible to
* the EFI runtime services.
*/
prot = __pgprot(PROT_DEVICE_nGnRnE);
if (region) {
switch (region->type) {
case EFI_LOADER_CODE:
case EFI_LOADER_DATA:
case EFI_BOOT_SERVICES_CODE:
case EFI_BOOT_SERVICES_DATA:
case EFI_CONVENTIONAL_MEMORY:
case EFI_PERSISTENT_MEMORY:
pr_warn(FW_BUG "requested region covers kernel memory @ %pa\n", &phys);
return NULL;
case EFI_RUNTIME_SERVICES_CODE:
/*
* This would be unusual, but not problematic per se,
* as long as we take care not to create a writable
* mapping for executable code.
*/
prot = PAGE_KERNEL_RO;
break;
case EFI_ACPI_RECLAIM_MEMORY:
/*
* ACPI reclaim memory is used to pass firmware tables
* and other data that is intended for consumption by
* the OS only, which may decide it wants to reclaim
* that memory and use it for something else. We never
* do that, but we usually add it to the linear map
* anyway, in which case we should use the existing
* mapping.
*/
if (memblock_is_map_memory(phys))
return (void __iomem *)__phys_to_virt(phys);
/* fall through */
default:
if (region->attribute & EFI_MEMORY_WB)
prot = PAGE_KERNEL;
else if (region->attribute & EFI_MEMORY_WT)
prot = __pgprot(PROT_NORMAL_WT);
else if (region->attribute & EFI_MEMORY_WC)
prot = __pgprot(PROT_NORMAL_NC);
}
}
return __ioremap(phys, size, prot);
}
/*
* Claim Synchronous External Aborts as a firmware first notification.
*

149
arch/arm64/kernel/cpufeature.c
View File

@ -119,25 +119,12 @@ static inline void finalize_system_capabilities(void)
static_branch_enable(&arm64_const_caps_ready);
}
static int dump_cpu_hwcaps(struct notifier_block *self, unsigned long v, void *p)
void dump_cpu_features(void)
{
/* file-wide pr_fmt adds "CPU features: " prefix */
pr_emerg("0x%*pb\n", ARM64_NCAPS, &cpu_hwcaps);
return 0;
}
static struct notifier_block cpu_hwcaps_notifier = {
.notifier_call = dump_cpu_hwcaps
};
static int __init register_cpu_hwcaps_dumper(void)
{
atomic_notifier_chain_register(&panic_notifier_list,
&cpu_hwcaps_notifier);
return 0;
}
__initcall(register_cpu_hwcaps_dumper);
DEFINE_STATIC_KEY_ARRAY_FALSE(cpu_hwcap_keys, ARM64_NCAPS);
EXPORT_SYMBOL(cpu_hwcap_keys);
@ -269,6 +256,9 @@ static const struct arm64_ftr_bits ftr_id_aa64zfr0[] = {
};
static const struct arm64_ftr_bits ftr_id_aa64mmfr0[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR0_ECV_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR0_FGT_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR0_EXS_SHIFT, 4, 0),
/*
* Page size not being supported at Stage-2 is not fatal. You
* just give up KVM if PAGE_SIZE isn't supported there. Go fix
@ -312,6 +302,10 @@ static const struct arm64_ftr_bits ftr_id_aa64mmfr0[] = {
};
static const struct arm64_ftr_bits ftr_id_aa64mmfr1[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR1_ETS_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR1_TWED_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR1_XNX_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_HIGHER_SAFE, ID_AA64MMFR1_SPECSEI_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR1_PAN_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR1_LOR_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR1_HPD_SHIFT, 4, 0),
@ -323,8 +317,15 @@ static const struct arm64_ftr_bits ftr_id_aa64mmfr1[] = {
static const struct arm64_ftr_bits ftr_id_aa64mmfr2[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_E0PD_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_EVT_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_BBM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_TTL_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_FWB_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_IDS_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_AT_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_ST_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_NV_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_CCIDX_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_LVA_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_IESB_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_LSM_SHIFT, 4, 0),
@ -345,7 +346,7 @@ static const struct arm64_ftr_bits ftr_ctr[] = {
* make use of *minLine.
* If we have differing I-cache policies, report it as the weakest - VIPT.
*/
ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_EXACT, 14, 2, ICACHE_POLICY_VIPT), /* L1Ip */
ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_EXACT, CTR_L1IP_SHIFT, 2, ICACHE_POLICY_VIPT), /* L1Ip */
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_IMINLINE_SHIFT, 4, 0),
ARM64_FTR_END,
};
@ -356,19 +357,19 @@ struct arm64_ftr_reg arm64_ftr_reg_ctrel0 = {
};
static const struct arm64_ftr_bits ftr_id_mmfr0[] = {
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0xf), /* InnerShr */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0), /* FCSE */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, 20, 4, 0), /* AuxReg */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 16, 4, 0), /* TCM */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 12, 4, 0), /* ShareLvl */
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 8, 4, 0xf), /* OuterShr */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 4, 4, 0), /* PMSA */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0), /* VMSA */
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR0_INNERSHR_SHIFT, 4, 0xf),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR0_FCSE_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_MMFR0_AUXREG_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR0_TCM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR0_SHARELVL_SHIFT, 4, 0),
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR0_OUTERSHR_SHIFT, 4, 0xf),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR0_PMSA_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR0_VMSA_SHIFT, 4, 0),
ARM64_FTR_END,
};
static const struct arm64_ftr_bits ftr_id_aa64dfr0[] = {
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 36, 4, 0),
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64DFR0_DOUBLELOCK_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64DFR0_PMSVER_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64DFR0_CTX_CMPS_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64DFR0_WRPS_SHIFT, 4, 0),
@ -384,14 +385,14 @@ static const struct arm64_ftr_bits ftr_id_aa64dfr0[] = {
};
static const struct arm64_ftr_bits ftr_mvfr2[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 4, 4, 0), /* FPMisc */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0), /* SIMDMisc */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, MVFR2_FPMISC_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, MVFR2_SIMDMISC_SHIFT, 4, 0),
ARM64_FTR_END,
};
static const struct arm64_ftr_bits ftr_dczid[] = {
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_EXACT, 4, 1, 1), /* DZP */
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0), /* BS */
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_EXACT, DCZID_DZP_SHIFT, 1, 1),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, DCZID_BS_SHIFT, 4, 0),
ARM64_FTR_END,
};
@ -423,7 +424,8 @@ static const struct arm64_ftr_bits ftr_id_mmfr4[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_HPDS_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_CNP_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_XNX_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 4, 4, 0), /* ac2 */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_AC2_SHIFT, 4, 0),
/*
* SpecSEI = 1 indicates that the PE might generate an SError on an
* external abort on speculative read. It is safe to assume that an
@ -465,10 +467,10 @@ static const struct arm64_ftr_bits ftr_id_isar6[] = {
static const struct arm64_ftr_bits ftr_id_pfr0[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_PFR0_DIT_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_PFR0_CSV2_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 12, 4, 0), /* State3 */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 8, 4, 0), /* State2 */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 4, 4, 0), /* State1 */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0), /* State0 */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_PFR0_STATE3_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_PFR0_STATE2_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_PFR0_STATE1_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_PFR0_STATE0_SHIFT, 4, 0),
ARM64_FTR_END,
};
@ -492,13 +494,13 @@ static const struct arm64_ftr_bits ftr_id_pfr2[] = {
static const struct arm64_ftr_bits ftr_id_dfr0[] = {
/* [31:28] TraceFilt */
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0xf), /* PerfMon */
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 20, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 16, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 12, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 8, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 4, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0),
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_DFR0_PERFMON_SHIFT, 4, 0xf),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_DFR0_MPROFDBG_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_DFR0_MMAPTRC_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_DFR0_COPTRC_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_DFR0_MMAPDBG_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_DFR0_COPSDBG_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_DFR0_COPDBG_SHIFT, 4, 0),
ARM64_FTR_END,
};
@ -697,11 +699,52 @@ static s64 arm64_ftr_safe_value(const struct arm64_ftr_bits *ftrp, s64 new,
static void __init sort_ftr_regs(void)
{
int i;
unsigned int i;
/* Check that the array is sorted so that we can do the binary search */
for (i = 1; i < ARRAY_SIZE(arm64_ftr_regs); i++)
for (i = 0; i < ARRAY_SIZE(arm64_ftr_regs); i++) {
const struct arm64_ftr_reg *ftr_reg = arm64_ftr_regs[i].reg;
const struct arm64_ftr_bits *ftr_bits = ftr_reg->ftr_bits;
unsigned int j = 0;
/*
* Features here must be sorted in descending order with respect
* to their shift values and should not overlap with each other.
*/
for (; ftr_bits->width != 0; ftr_bits++, j++) {
unsigned int width = ftr_reg->ftr_bits[j].width;
unsigned int shift = ftr_reg->ftr_bits[j].shift;
unsigned int prev_shift;
WARN((shift + width) > 64,
"%s has invalid feature at shift %d\n",
ftr_reg->name, shift);
/*
* Skip the first feature. There is nothing to
* compare against for now.
*/
if (j == 0)
continue;
prev_shift = ftr_reg->ftr_bits[j - 1].shift;
WARN((shift + width) > prev_shift,
"%s has feature overlap at shift %d\n",
ftr_reg->name, shift);
}
/*
* Skip the first register. There is nothing to
* compare against for now.
*/
if (i == 0)
continue;
/*
* Registers here must be sorted in ascending order with respect
* to sys_id for subsequent binary search in get_arm64_ftr_reg()
* to work correctly.
*/
BUG_ON(arm64_ftr_regs[i].sys_id < arm64_ftr_regs[i - 1].sys_id);
}
}
/*
@ -1884,6 +1927,26 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.matches = has_cpuid_feature,
.cpu_enable = cpu_has_fwb,
},
{
.desc = "ARMv8.4 Translation Table Level",
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.capability = ARM64_HAS_ARMv8_4_TTL,
.sys_reg = SYS_ID_AA64MMFR2_EL1,
.sign = FTR_UNSIGNED,
.field_pos = ID_AA64MMFR2_TTL_SHIFT,
.min_field_value = 1,
.matches = has_cpuid_feature,
},
{
.desc = "TLB range maintenance instructions",
.capability = ARM64_HAS_TLB_RANGE,
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.matches = has_cpuid_feature,
.sys_reg = SYS_ID_AA64ISAR0_EL1,
.field_pos = ID_AA64ISAR0_TLB_SHIFT,
.sign = FTR_UNSIGNED,
.min_field_value = ID_AA64ISAR0_TLB_RANGE,
},
#ifdef CONFIG_ARM64_HW_AFDBM
{
/*

1
arch/arm64/kernel/cpuinfo.c
View File

@ -93,6 +93,7 @@ static const char *const hwcap_str[] = {
"dgh",
"rng",
"bti",
/* reserved for "mte" */
NULL
};

10
arch/arm64/kernel/crash_core.c
View File

@ -7,6 +7,14 @@
#include <linux/crash_core.h>
#include <asm/cpufeature.h>
#include <asm/memory.h>
#include <asm/pgtable-hwdef.h>
static inline u64 get_tcr_el1_t1sz(void);
static inline u64 get_tcr_el1_t1sz(void)
{
return (read_sysreg(tcr_el1) & TCR_T1SZ_MASK) >> TCR_T1SZ_OFFSET;
}
void arch_crash_save_vmcoreinfo(void)
{
@ -16,6 +24,8 @@ void arch_crash_save_vmcoreinfo(void)
kimage_voffset);
vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n",
PHYS_OFFSET);
vmcoreinfo_append_str("NUMBER(TCR_EL1_T1SZ)=0x%llx\n",
get_tcr_el1_t1sz());
vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset());
vmcoreinfo_append_str("NUMBER(KERNELPACMASK)=0x%llx\n",
system_supports_address_auth() ?

96
arch/arm64/kernel/entry.S
View File

@ -15,6 +15,7 @@
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/asm_pointer_auth.h>
#include <asm/bug.h>
#include <asm/cpufeature.h>
#include <asm/errno.h>
#include <asm/esr.h>
@ -226,28 +227,9 @@ alternative_else_nop_endif
add x29, sp, #S_STACKFRAME
#ifdef CONFIG_ARM64_SW_TTBR0_PAN
/*
* Set the TTBR0 PAN bit in SPSR. When the exception is taken from
* EL0, there is no need to check the state of TTBR0_EL1 since
* accesses are always enabled.
* Note that the meaning of this bit differs from the ARMv8.1 PAN
* feature as all TTBR0_EL1 accesses are disabled, not just those to
* user mappings.
*/
alternative_if ARM64_HAS_PAN
b 1f // skip TTBR0 PAN
alternative_if_not ARM64_HAS_PAN
bl __swpan_entry_el\el
alternative_else_nop_endif
.if \el != 0
mrs x21, ttbr0_el1
tst x21, #TTBR_ASID_MASK // Check for the reserved ASID
orr x23, x23, #PSR_PAN_BIT // Set the emulated PAN in the saved SPSR
b.eq 1f // TTBR0 access already disabled
and x23, x23, #~PSR_PAN_BIT // Clear the emulated PAN in the saved SPSR
.endif
__uaccess_ttbr0_disable x21
1:
#endif
stp x22, x23, [sp, #S_PC]
@ -301,34 +283,9 @@ alternative_else_nop_endif
.endif
#ifdef CONFIG_ARM64_SW_TTBR0_PAN
/*
* Restore access to TTBR0_EL1. If returning to EL0, no need for SPSR
* PAN bit checking.
*/
alternative_if ARM64_HAS_PAN
b 2f // skip TTBR0 PAN
alternative_if_not ARM64_HAS_PAN
bl __swpan_exit_el\el
alternative_else_nop_endif
.if \el != 0
tbnz x22, #22, 1f // Skip re-enabling TTBR0 access if the PSR_PAN_BIT is set
.endif
__uaccess_ttbr0_enable x0, x1
.if \el == 0
/*
* Enable errata workarounds only if returning to user. The only
* workaround currently required for TTBR0_EL1 changes are for the
* Cavium erratum 27456 (broadcast TLBI instructions may cause I-cache
* corruption).
*/
bl post_ttbr_update_workaround
.endif
1:
.if \el != 0
and x22, x22, #~PSR_PAN_BIT // ARMv8.0 CPUs do not understand this bit
.endif
2:
#endif
.if \el == 0
@ -401,6 +358,49 @@ alternative_insn eret, nop, ARM64_UNMAP_KERNEL_AT_EL0
sb
.endm
#ifdef CONFIG_ARM64_SW_TTBR0_PAN
/*
* Set the TTBR0 PAN bit in SPSR. When the exception is taken from
* EL0, there is no need to check the state of TTBR0_EL1 since
* accesses are always enabled.
* Note that the meaning of this bit differs from the ARMv8.1 PAN
* feature as all TTBR0_EL1 accesses are disabled, not just those to
* user mappings.
*/
SYM_CODE_START_LOCAL(__swpan_entry_el1)
mrs x21, ttbr0_el1
tst x21, #TTBR_ASID_MASK // Check for the reserved ASID
orr x23, x23, #PSR_PAN_BIT // Set the emulated PAN in the saved SPSR
b.eq 1f // TTBR0 access already disabled
and x23, x23, #~PSR_PAN_BIT // Clear the emulated PAN in the saved SPSR
SYM_INNER_LABEL(__swpan_entry_el0, SYM_L_LOCAL)
__uaccess_ttbr0_disable x21
1: ret
SYM_CODE_END(__swpan_entry_el1)
/*
* Restore access to TTBR0_EL1. If returning to EL0, no need for SPSR
* PAN bit checking.
*/
SYM_CODE_START_LOCAL(__swpan_exit_el1)
tbnz x22, #22, 1f // Skip re-enabling TTBR0 access if the PSR_PAN_BIT is set
__uaccess_ttbr0_enable x0, x1
1: and x22, x22, #~PSR_PAN_BIT // ARMv8.0 CPUs do not understand this bit
ret
SYM_CODE_END(__swpan_exit_el1)
SYM_CODE_START_LOCAL(__swpan_exit_el0)
__uaccess_ttbr0_enable x0, x1
/*
* Enable errata workarounds only if returning to user. The only
* workaround currently required for TTBR0_EL1 changes are for the
* Cavium erratum 27456 (broadcast TLBI instructions may cause I-cache
* corruption).
*/
b post_ttbr_update_workaround
SYM_CODE_END(__swpan_exit_el0)
#endif
.macro irq_stack_entry
mov x19, sp // preserve the original sp
#ifdef CONFIG_SHADOW_CALL_STACK

46
arch/arm64/kernel/module-plts.c
View File

@ -253,6 +253,40 @@ static unsigned int count_plts(Elf64_Sym *syms, Elf64_Rela *rela, int num,
return ret;
}
static bool branch_rela_needs_plt(Elf64_Sym *syms, Elf64_Rela *rela,
Elf64_Word dstidx)
{
Elf64_Sym *s = syms + ELF64_R_SYM(rela->r_info);
if (s->st_shndx == dstidx)
return false;
return ELF64_R_TYPE(rela->r_info) == R_AARCH64_JUMP26 ||
ELF64_R_TYPE(rela->r_info) == R_AARCH64_CALL26;
}
/* Group branch PLT relas at the front end of the array. */
static int partition_branch_plt_relas(Elf64_Sym *syms, Elf64_Rela *rela,
int numrels, Elf64_Word dstidx)
{
int i = 0, j = numrels - 1;
if (!IS_ENABLED(CONFIG_RANDOMIZE_BASE))
return 0;
while (i < j) {
if (branch_rela_needs_plt(syms, &rela[i], dstidx))
i++;
else if (branch_rela_needs_plt(syms, &rela[j], dstidx))
swap(rela[i], rela[j]);
else
j--;
}
return i;
}
int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
char *secstrings, struct module *mod)
{
@ -290,7 +324,7 @@ int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
for (i = 0; i < ehdr->e_shnum; i++) {
Elf64_Rela *rels = (void *)ehdr + sechdrs[i].sh_offset;
int numrels = sechdrs[i].sh_size / sizeof(Elf64_Rela);
int nents, numrels = sechdrs[i].sh_size / sizeof(Elf64_Rela);
Elf64_Shdr *dstsec = sechdrs + sechdrs[i].sh_info;
if (sechdrs[i].sh_type != SHT_RELA)
@ -300,8 +334,14 @@ int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
if (!(dstsec->sh_flags & SHF_EXECINSTR))
continue;
/* sort by type, symbol index and addend */
sort(rels, numrels, sizeof(Elf64_Rela), cmp_rela, NULL);
/*
* sort branch relocations requiring a PLT by type, symbol index
* and addend
*/
nents = partition_branch_plt_relas(syms, rels, numrels,
sechdrs[i].sh_info);
if (nents)
sort(rels, nents, sizeof(Elf64_Rela), cmp_rela, NULL);
if (!str_has_prefix(secstrings + dstsec->sh_name, ".init"))
core_plts += count_plts(syms, rels, numrels,

89
arch/arm64/kernel/perf_event.c
View File

@ -13,12 +13,15 @@
#include <asm/sysreg.h>
#include <asm/virt.h>
#include <clocksource/arm_arch_timer.h>
#include <linux/acpi.h>
#include <linux/clocksource.h>
#include <linux/kvm_host.h>
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
#include <linux/sched_clock.h>
#include <linux/smp.h>
/* ARMv8 Cortex-A53 specific event types. */
@ -155,7 +158,7 @@ armv8pmu_events_sysfs_show(struct device *dev,
pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);
return sprintf(page, "event=0x%03llx\n", pmu_attr->id);
return sprintf(page, "event=0x%04llx\n", pmu_attr->id);
}
#define ARMV8_EVENT_ATTR(name, config) \
@ -222,10 +225,29 @@ static struct attribute *armv8_pmuv3_event_attrs[] = {
ARMV8_EVENT_ATTR(ll_cache_rd, ARMV8_PMUV3_PERFCTR_LL_CACHE_RD),
ARMV8_EVENT_ATTR(ll_cache_miss_rd, ARMV8_PMUV3_PERFCTR_LL_CACHE_MISS_RD),
ARMV8_EVENT_ATTR(remote_access_rd, ARMV8_PMUV3_PERFCTR_REMOTE_ACCESS_RD),
ARMV8_EVENT_ATTR(l1d_cache_lmiss_rd, ARMV8_PMUV3_PERFCTR_L1D_CACHE_LMISS_RD),
ARMV8_EVENT_ATTR(op_retired, ARMV8_PMUV3_PERFCTR_OP_RETIRED),
ARMV8_EVENT_ATTR(op_spec, ARMV8_PMUV3_PERFCTR_OP_SPEC),
ARMV8_EVENT_ATTR(stall, ARMV8_PMUV3_PERFCTR_STALL),
ARMV8_EVENT_ATTR(stall_slot_backend, ARMV8_PMUV3_PERFCTR_STALL_SLOT_BACKEND),
ARMV8_EVENT_ATTR(stall_slot_frontend, ARMV8_PMUV3_PERFCTR_STALL_SLOT_FRONTEND),
ARMV8_EVENT_ATTR(stall_slot, ARMV8_PMUV3_PERFCTR_STALL_SLOT),
ARMV8_EVENT_ATTR(sample_pop, ARMV8_SPE_PERFCTR_SAMPLE_POP),
ARMV8_EVENT_ATTR(sample_feed, ARMV8_SPE_PERFCTR_SAMPLE_FEED),
ARMV8_EVENT_ATTR(sample_filtrate, ARMV8_SPE_PERFCTR_SAMPLE_FILTRATE),
ARMV8_EVENT_ATTR(sample_collision, ARMV8_SPE_PERFCTR_SAMPLE_COLLISION),
ARMV8_EVENT_ATTR(cnt_cycles, ARMV8_AMU_PERFCTR_CNT_CYCLES),
ARMV8_EVENT_ATTR(stall_backend_mem, ARMV8_AMU_PERFCTR_STALL_BACKEND_MEM),
ARMV8_EVENT_ATTR(l1i_cache_lmiss, ARMV8_PMUV3_PERFCTR_L1I_CACHE_LMISS),
ARMV8_EVENT_ATTR(l2d_cache_lmiss_rd, ARMV8_PMUV3_PERFCTR_L2D_CACHE_LMISS_RD),
ARMV8_EVENT_ATTR(l2i_cache_lmiss, ARMV8_PMUV3_PERFCTR_L2I_CACHE_LMISS),
ARMV8_EVENT_ATTR(l3d_cache_lmiss_rd, ARMV8_PMUV3_PERFCTR_L3D_CACHE_LMISS_RD),
ARMV8_EVENT_ATTR(ldst_align_lat, ARMV8_PMUV3_PERFCTR_LDST_ALIGN_LAT),
ARMV8_EVENT_ATTR(ld_align_lat, ARMV8_PMUV3_PERFCTR_LD_ALIGN_LAT),
ARMV8_EVENT_ATTR(st_align_lat, ARMV8_PMUV3_PERFCTR_ST_ALIGN_LAT),
ARMV8_EVENT_ATTR(mem_access_checked, ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED),
ARMV8_EVENT_ATTR(mem_access_checked_rd, ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED_RD),
ARMV8_EVENT_ATTR(mem_access_checked_wr, ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED_WR),
NULL,
};
@ -244,10 +266,13 @@ armv8pmu_event_attr_is_visible(struct kobject *kobj,
test_bit(pmu_attr->id, cpu_pmu->pmceid_bitmap))
return attr->mode;
pmu_attr->id -= ARMV8_PMUV3_EXT_COMMON_EVENT_BASE;
if (pmu_attr->id < ARMV8_PMUV3_MAX_COMMON_EVENTS &&
test_bit(pmu_attr->id, cpu_pmu->pmceid_ext_bitmap))
return attr->mode;
if (pmu_attr->id >= ARMV8_PMUV3_EXT_COMMON_EVENT_BASE) {
u64 id = pmu_attr->id - ARMV8_PMUV3_EXT_COMMON_EVENT_BASE;
if (id < ARMV8_PMUV3_MAX_COMMON_EVENTS &&
test_bit(id, cpu_pmu->pmceid_ext_bitmap))
return attr->mode;
}
return 0;
}
@ -1165,28 +1190,54 @@ device_initcall(armv8_pmu_driver_init)
void arch_perf_update_userpage(struct perf_event *event,
struct perf_event_mmap_page *userpg, u64 now)
{
u32 freq;
u32 shift;
struct clock_read_data *rd;
unsigned int seq;
u64 ns;
/*
* Internal timekeeping for enabled/running/stopped times
* is always computed with the sched_clock.
*/
freq = arch_timer_get_rate();
userpg->cap_user_time = 1;
userpg->cap_user_time = 0;
userpg->cap_user_time_zero = 0;
userpg->cap_user_time_short = 0;
do {
rd = sched_clock_read_begin(&seq);
if (rd->read_sched_clock != arch_timer_read_counter)
return;
userpg->time_mult = rd->mult;
userpg->time_shift = rd->shift;
userpg->time_zero = rd->epoch_ns;
userpg->time_cycles = rd->epoch_cyc;
userpg->time_mask = rd->sched_clock_mask;
/*
* Subtract the cycle base, such that software that
* doesn't know about cap_user_time_short still 'works'
* assuming no wraps.
*/
ns = mul_u64_u32_shr(rd->epoch_cyc, rd->mult, rd->shift);
userpg->time_zero -= ns;
} while (sched_clock_read_retry(seq));
userpg->time_offset = userpg->time_zero - now;
clocks_calc_mult_shift(&userpg->time_mult, &shift, freq,
NSEC_PER_SEC, 0);
/*
* time_shift is not expected to be greater than 31 due to
* the original published conversion algorithm shifting a
* 32-bit value (now specifies a 64-bit value) - refer
* perf_event_mmap_page documentation in perf_event.h.
*/
if (shift == 32) {
shift = 31;
if (userpg->time_shift == 32) {
userpg->time_shift = 31;
userpg->time_mult >>= 1;
}
userpg->time_shift = (u16)shift;
userpg->time_offset = -now;
/*
* Internal timekeeping for enabled/running/stopped times
* is always computed with the sched_clock.
*/
userpg->cap_user_time = 1;
userpg->cap_user_time_zero = 1;
userpg->cap_user_time_short = 1;
}

24
arch/arm64/kernel/setup.c
View File

@ -400,11 +400,7 @@ static int __init topology_init(void)
}
subsys_initcall(topology_init);
/*
* Dump out kernel offset information on panic.
*/
static int dump_kernel_offset(struct notifier_block *self, unsigned long v,
void *p)
static void dump_kernel_offset(void)
{
const unsigned long offset = kaslr_offset();
@ -415,17 +411,25 @@ static int dump_kernel_offset(struct notifier_block *self, unsigned long v,
} else {
pr_emerg("Kernel Offset: disabled\n");
}
}
static int arm64_panic_block_dump(struct notifier_block *self,
unsigned long v, void *p)
{
dump_kernel_offset();
dump_cpu_features();
dump_mem_limit();
return 0;
}
static struct notifier_block kernel_offset_notifier = {
.notifier_call = dump_kernel_offset
static struct notifier_block arm64_panic_block = {
.notifier_call = arm64_panic_block_dump
};
static int __init register_kernel_offset_dumper(void)
static int __init register_arm64_panic_block(void)
{
atomic_notifier_chain_register(&panic_notifier_list,
&kernel_offset_notifier);
&arm64_panic_block);
return 0;
}
__initcall(register_kernel_offset_dumper);
device_initcall(register_arm64_panic_block);

2
arch/arm64/kernel/stacktrace.c
View File

@ -199,12 +199,12 @@ static noinline void __save_stack_trace(struct task_struct *tsk,
put_task_stack(tsk);
}
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
__save_stack_trace(tsk, trace, 1);
}
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
void save_stack_trace(struct stack_trace *trace)
{

2
arch/arm64/kernel/traps.c
View File

@ -855,7 +855,7 @@ asmlinkage void handle_bad_stack(struct pt_regs *regs)
pr_emerg("Task stack: [0x%016lx..0x%016lx]\n",
tsk_stk, tsk_stk + THREAD_SIZE);
pr_emerg("IRQ stack: [0x%016lx..0x%016lx]\n",
irq_stk, irq_stk + THREAD_SIZE);
irq_stk, irq_stk + IRQ_STACK_SIZE);
pr_emerg("Overflow stack: [0x%016lx..0x%016lx]\n",
ovf_stk, ovf_stk + OVERFLOW_STACK_SIZE);

136
arch/arm64/kernel/vdso.c
View File

@ -18,6 +18,7 @@
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/slab.h>
#include <linux/time_namespace.h>
#include <linux/timekeeper_internal.h>
#include <linux/vmalloc.h>
#include <vdso/datapage.h>
@ -40,6 +41,12 @@ enum vdso_abi {
#endif /* CONFIG_COMPAT_VDSO */
};
enum vvar_pages {
VVAR_DATA_PAGE_OFFSET,
VVAR_TIMENS_PAGE_OFFSET,
VVAR_NR_PAGES,
};
struct vdso_abi_info {
const char *name;
const char *vdso_code_start;
@ -107,25 +114,122 @@ static int __vdso_init(enum vdso_abi abi)
vdso_info[abi].vdso_code_start) >>
PAGE_SHIFT;
/* Allocate the vDSO pagelist, plus a page for the data. */
vdso_pagelist = kcalloc(vdso_info[abi].vdso_pages + 1,
vdso_pagelist = kcalloc(vdso_info[abi].vdso_pages,
sizeof(struct page *),
GFP_KERNEL);
if (vdso_pagelist == NULL)
return -ENOMEM;
/* Grab the vDSO data page. */
vdso_pagelist[0] = phys_to_page(__pa_symbol(vdso_data));
/* Grab the vDSO code pages. */
pfn = sym_to_pfn(vdso_info[abi].vdso_code_start);
for (i = 0; i < vdso_info[abi].vdso_pages; i++)
vdso_pagelist[i + 1] = pfn_to_page(pfn + i);
vdso_pagelist[i] = pfn_to_page(pfn + i);
vdso_info[abi].dm->pages = &vdso_pagelist[0];
vdso_info[abi].cm->pages = &vdso_pagelist[1];
vdso_info[abi].cm->pages = vdso_pagelist;
return 0;
}
#ifdef CONFIG_TIME_NS
struct vdso_data *arch_get_vdso_data(void *vvar_page)
{
return (struct vdso_data *)(vvar_page);
}
/*
* The vvar mapping contains data for a specific time namespace, so when a task
* changes namespace we must unmap its vvar data for the old namespace.
* Subsequent faults will map in data for the new namespace.
*
* For more details see timens_setup_vdso_data().
*/
int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
{
struct mm_struct *mm = task->mm;
struct vm_area_struct *vma;
mmap_read_lock(mm);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
unsigned long size = vma->vm_end - vma->vm_start;
if (vma_is_special_mapping(vma, vdso_info[VDSO_ABI_AA64].dm))
zap_page_range(vma, vma->vm_start, size);
#ifdef CONFIG_COMPAT_VDSO
if (vma_is_special_mapping(vma, vdso_info[VDSO_ABI_AA32].dm))
zap_page_range(vma, vma->vm_start, size);
#endif
}
mmap_read_unlock(mm);
return 0;
}
static struct page *find_timens_vvar_page(struct vm_area_struct *vma)
{
if (likely(vma->vm_mm == current->mm))
return current->nsproxy->time_ns->vvar_page;
/*
* VM_PFNMAP | VM_IO protect .fault() handler from being called
* through interfaces like /proc/$pid/mem or
* process_vm_{readv,writev}() as long as there's no .access()
* in special_mapping_vmops.
* For more details check_vma_flags() and __access_remote_vm()
*/
WARN(1, "vvar_page accessed remotely");
return NULL;
}
#else
static struct page *find_timens_vvar_page(struct vm_area_struct *vma)
{
return NULL;
}
#endif
static vm_fault_t vvar_fault(const struct vm_special_mapping *sm,
struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct page *timens_page = find_timens_vvar_page(vma);
unsigned long pfn;
switch (vmf->pgoff) {
case VVAR_DATA_PAGE_OFFSET:
if (timens_page)
pfn = page_to_pfn(timens_page);
else
pfn = sym_to_pfn(vdso_data);
break;
#ifdef CONFIG_TIME_NS
case VVAR_TIMENS_PAGE_OFFSET:
/*
* If a task belongs to a time namespace then a namespace
* specific VVAR is mapped with the VVAR_DATA_PAGE_OFFSET and
* the real VVAR page is mapped with the VVAR_TIMENS_PAGE_OFFSET
* offset.
* See also the comment near timens_setup_vdso_data().
*/
if (!timens_page)
return VM_FAULT_SIGBUS;
pfn = sym_to_pfn(vdso_data);
break;
#endif /* CONFIG_TIME_NS */
default:
return VM_FAULT_SIGBUS;
}
return vmf_insert_pfn(vma, vmf->address, pfn);
}
static int vvar_mremap(const struct vm_special_mapping *sm,
struct vm_area_struct *new_vma)
{
unsigned long new_size = new_vma->vm_end - new_vma->vm_start;
if (new_size != VVAR_NR_PAGES * PAGE_SIZE)
return -EINVAL;
return 0;
}
@ -139,9 +243,11 @@ static int __setup_additional_pages(enum vdso_abi abi,
unsigned long gp_flags = 0;
void *ret;
BUILD_BUG_ON(VVAR_NR_PAGES != __VVAR_PAGES);
vdso_text_len = vdso_info[abi].vdso_pages << PAGE_SHIFT;
/* Be sure to map the data page */
vdso_mapping_len = vdso_text_len + PAGE_SIZE;
vdso_mapping_len = vdso_text_len + VVAR_NR_PAGES * PAGE_SIZE;
vdso_base = get_unmapped_area(NULL, 0, vdso_mapping_len, 0, 0);
if (IS_ERR_VALUE(vdso_base)) {
@ -149,8 +255,8 @@ static int __setup_additional_pages(enum vdso_abi abi,
goto up_fail;
}
ret = _install_special_mapping(mm, vdso_base, PAGE_SIZE,
VM_READ|VM_MAYREAD,
ret = _install_special_mapping(mm, vdso_base, VVAR_NR_PAGES * PAGE_SIZE,
VM_READ|VM_MAYREAD|VM_PFNMAP,
vdso_info[abi].dm);
if (IS_ERR(ret))
goto up_fail;
@ -158,7 +264,7 @@ static int __setup_additional_pages(enum vdso_abi abi,
if (IS_ENABLED(CONFIG_ARM64_BTI_KERNEL) && system_supports_bti())
gp_flags = VM_ARM64_BTI;
vdso_base += PAGE_SIZE;
vdso_base += VVAR_NR_PAGES * PAGE_SIZE;
mm->context.vdso = (void *)vdso_base;
ret = _install_special_mapping(mm, vdso_base, vdso_text_len,
VM_READ|VM_EXEC|gp_flags|
@ -206,6 +312,8 @@ static struct vm_special_mapping aarch32_vdso_maps[] = {
#ifdef CONFIG_COMPAT_VDSO
[AA32_MAP_VVAR] = {
.name = "[vvar]",
.fault = vvar_fault,
.mremap = vvar_mremap,
},
[AA32_MAP_VDSO] = {
.name = "[vdso]",
@ -371,6 +479,8 @@ enum aarch64_map {
static struct vm_special_mapping aarch64_vdso_maps[] __ro_after_init = {
[AA64_MAP_VVAR] = {
.name = "[vvar]",
.fault = vvar_fault,
.mremap = vvar_mremap,
},
[AA64_MAP_VDSO] = {
.name = "[vdso]",

5
arch/arm64/kernel/vdso/vdso.lds.S
View File

@ -17,7 +17,10 @@ OUTPUT_ARCH(aarch64)
SECTIONS
{
PROVIDE(_vdso_data = . - PAGE_SIZE);
PROVIDE(_vdso_data = . - __VVAR_PAGES * PAGE_SIZE);
#ifdef CONFIG_TIME_NS
PROVIDE(_timens_data = _vdso_data + PAGE_SIZE);
#endif
. = VDSO_LBASE + SIZEOF_HEADERS;
.hash : { *(.hash) } :text

5
arch/arm64/kernel/vdso32/vdso.lds.S
View File

@ -17,7 +17,10 @@ OUTPUT_ARCH(arm)
SECTIONS
{
PROVIDE_HIDDEN(_vdso_data = . - PAGE_SIZE);
PROVIDE_HIDDEN(_vdso_data = . - __VVAR_PAGES * PAGE_SIZE);
#ifdef CONFIG_TIME_NS
PROVIDE_HIDDEN(_timens_data = _vdso_data + PAGE_SIZE);
#endif
. = VDSO_LBASE + SIZEOF_HEADERS;
.hash : { *(.hash) } :text

1
arch/arm64/kernel/vmlinux.lds.S
View File

@ -10,7 +10,6 @@
#include <asm-generic/vmlinux.lds.h>
#include <asm/cache.h>
#include <asm/kernel-pgtable.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/page.h>

1
arch/arm64/kvm/hyp-init.S
View File

@ -6,6 +6,7 @@
#include <linux/linkage.h>
#include <asm/alternative.h>
#include <asm/assembler.h>
#include <asm/kvm_arm.h>
#include <asm/kvm_mmu.h>

68
arch/arm64/kvm/sys_regs.c
View File

@ -1024,9 +1024,9 @@ static bool access_amu(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
/* Macro to expand the AMU counter and type registers*/
#define AMU_AMEVCNTR0_EL0(n) { SYS_DESC(SYS_AMEVCNTR0_EL0(n)), access_amu }
#define AMU_AMEVTYPE0_EL0(n) { SYS_DESC(SYS_AMEVTYPE0_EL0(n)), access_amu }
#define AMU_AMEVTYPER0_EL0(n) { SYS_DESC(SYS_AMEVTYPER0_EL0(n)), access_amu }
#define AMU_AMEVCNTR1_EL0(n) { SYS_DESC(SYS_AMEVCNTR1_EL0(n)), access_amu }
#define AMU_AMEVTYPE1_EL0(n) { SYS_DESC(SYS_AMEVTYPE1_EL0(n)), access_amu }
#define AMU_AMEVTYPER1_EL0(n) { SYS_DESC(SYS_AMEVTYPER1_EL0(n)), access_amu }
static bool trap_ptrauth(struct kvm_vcpu *vcpu,
struct sys_reg_params *p,
@ -1629,22 +1629,22 @@ static const struct sys_reg_desc sys_reg_descs[] = {
AMU_AMEVCNTR0_EL0(13),
AMU_AMEVCNTR0_EL0(14),
AMU_AMEVCNTR0_EL0(15),
AMU_AMEVTYPE0_EL0(0),
AMU_AMEVTYPE0_EL0(1),
AMU_AMEVTYPE0_EL0(2),
AMU_AMEVTYPE0_EL0(3),
AMU_AMEVTYPE0_EL0(4),
AMU_AMEVTYPE0_EL0(5),
AMU_AMEVTYPE0_EL0(6),
AMU_AMEVTYPE0_EL0(7),
AMU_AMEVTYPE0_EL0(8),
AMU_AMEVTYPE0_EL0(9),
AMU_AMEVTYPE0_EL0(10),
AMU_AMEVTYPE0_EL0(11),
AMU_AMEVTYPE0_EL0(12),
AMU_AMEVTYPE0_EL0(13),
AMU_AMEVTYPE0_EL0(14),
AMU_AMEVTYPE0_EL0(15),
AMU_AMEVTYPER0_EL0(0),
AMU_AMEVTYPER0_EL0(1),
AMU_AMEVTYPER0_EL0(2),
AMU_AMEVTYPER0_EL0(3),
AMU_AMEVTYPER0_EL0(4),
AMU_AMEVTYPER0_EL0(5),
AMU_AMEVTYPER0_EL0(6),
AMU_AMEVTYPER0_EL0(7),
AMU_AMEVTYPER0_EL0(8),
AMU_AMEVTYPER0_EL0(9),
AMU_AMEVTYPER0_EL0(10),
AMU_AMEVTYPER0_EL0(11),
AMU_AMEVTYPER0_EL0(12),
AMU_AMEVTYPER0_EL0(13),
AMU_AMEVTYPER0_EL0(14),
AMU_AMEVTYPER0_EL0(15),
AMU_AMEVCNTR1_EL0(0),
AMU_AMEVCNTR1_EL0(1),
AMU_AMEVCNTR1_EL0(2),
@ -1661,22 +1661,22 @@ static const struct sys_reg_desc sys_reg_descs[] = {
AMU_AMEVCNTR1_EL0(13),
AMU_AMEVCNTR1_EL0(14),
AMU_AMEVCNTR1_EL0(15),
AMU_AMEVTYPE1_EL0(0),
AMU_AMEVTYPE1_EL0(1),
AMU_AMEVTYPE1_EL0(2),
AMU_AMEVTYPE1_EL0(3),
AMU_AMEVTYPE1_EL0(4),
AMU_AMEVTYPE1_EL0(5),
AMU_AMEVTYPE1_EL0(6),
AMU_AMEVTYPE1_EL0(7),
AMU_AMEVTYPE1_EL0(8),
AMU_AMEVTYPE1_EL0(9),
AMU_AMEVTYPE1_EL0(10),
AMU_AMEVTYPE1_EL0(11),
AMU_AMEVTYPE1_EL0(12),
AMU_AMEVTYPE1_EL0(13),
AMU_AMEVTYPE1_EL0(14),
AMU_AMEVTYPE1_EL0(15),
AMU_AMEVTYPER1_EL0(0),
AMU_AMEVTYPER1_EL0(1),
AMU_AMEVTYPER1_EL0(2),
AMU_AMEVTYPER1_EL0(3),
AMU_AMEVTYPER1_EL0(4),
AMU_AMEVTYPER1_EL0(5),
AMU_AMEVTYPER1_EL0(6),
AMU_AMEVTYPER1_EL0(7),
AMU_AMEVTYPER1_EL0(8),
AMU_AMEVTYPER1_EL0(9),
AMU_AMEVTYPER1_EL0(10),
AMU_AMEVTYPER1_EL0(11),
AMU_AMEVTYPER1_EL0(12),
AMU_AMEVTYPER1_EL0(13),
AMU_AMEVTYPER1_EL0(14),
AMU_AMEVTYPER1_EL0(15),
{ SYS_DESC(SYS_CNTP_TVAL_EL0), access_arch_timer },
{ SYS_DESC(SYS_CNTP_CTL_EL0), access_arch_timer },

10
arch/arm64/mm/context.c
View File

@ -198,9 +198,10 @@ set_asid:
return idx2asid(asid) | generation;
}
void check_and_switch_context(struct mm_struct *mm, unsigned int cpu)
void check_and_switch_context(struct mm_struct *mm)
{
unsigned long flags;
unsigned int cpu;
u64 asid, old_active_asid;
if (system_supports_cnp())
@ -222,9 +223,9 @@ void check_and_switch_context(struct mm_struct *mm, unsigned int cpu)
* relaxed xchg in flush_context will treat us as reserved
* because atomic RmWs are totally ordered for a given location.
*/
old_active_asid = atomic64_read(&per_cpu(active_asids, cpu));
old_active_asid = atomic64_read(this_cpu_ptr(&active_asids));
if (old_active_asid && asid_gen_match(asid) &&
atomic64_cmpxchg_relaxed(&per_cpu(active_asids, cpu),
atomic64_cmpxchg_relaxed(this_cpu_ptr(&active_asids),
old_active_asid, asid))
goto switch_mm_fastpath;
@ -236,10 +237,11 @@ void check_and_switch_context(struct mm_struct *mm, unsigned int cpu)
atomic64_set(&mm->context.id, asid);
}
cpu = smp_processor_id();
if (cpumask_test_and_clear_cpu(cpu, &tlb_flush_pending))
local_flush_tlb_all();
atomic64_set(&per_cpu(active_asids, cpu), asid);
atomic64_set(this_cpu_ptr(&active_asids), asid);
raw_spin_unlock_irqrestore(&cpu_asid_lock, flags);
switch_mm_fastpath:

42
arch/arm64/mm/hugetlbpage.c
View File

@ -19,6 +19,44 @@
#include <asm/tlbflush.h>
#include <asm/pgalloc.h>
/*
* HugeTLB Support Matrix
*
* ---------------------------------------------------
* | Page Size | CONT PTE | PMD | CONT PMD | PUD |
* ---------------------------------------------------
* | 4K | 64K | 2M | 32M | 1G |
* | 16K | 2M | 32M | 1G | |
* | 64K | 2M | 512M | 16G | |
* ---------------------------------------------------
*/
/*
* Reserve CMA areas for the largest supported gigantic
* huge page when requested. Any other smaller gigantic
* huge pages could still be served from those areas.
*/
#ifdef CONFIG_CMA
void __init arm64_hugetlb_cma_reserve(void)
{
int order;
#ifdef CONFIG_ARM64_4K_PAGES
order = PUD_SHIFT - PAGE_SHIFT;
#else
order = CONT_PMD_SHIFT + PMD_SHIFT - PAGE_SHIFT;
#endif
/*
* HugeTLB CMA reservation is required for gigantic
* huge pages which could not be allocated via the
* page allocator. Just warn if there is any change
* breaking this assumption.
*/
WARN_ON(order <= MAX_ORDER);
hugetlb_cma_reserve(order);
}
#endif /* CONFIG_CMA */
#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
bool arch_hugetlb_migration_supported(struct hstate *h)
{
@ -457,9 +495,9 @@ static int __init hugetlbpage_init(void)
#ifdef CONFIG_ARM64_4K_PAGES
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
#endif
hugetlb_add_hstate((CONT_PMD_SHIFT + PMD_SHIFT) - PAGE_SHIFT);
hugetlb_add_hstate(CONT_PMD_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate((CONT_PTE_SHIFT + PAGE_SHIFT) - PAGE_SHIFT);
hugetlb_add_hstate(CONT_PTE_SHIFT - PAGE_SHIFT);
return 0;
}

22
arch/arm64/mm/init.c
View File

@ -425,8 +425,8 @@ void __init bootmem_init(void)
* initialize node_online_map that gets used in hugetlb_cma_reserve()
* while allocating required CMA size across online nodes.
*/
#ifdef CONFIG_ARM64_4K_PAGES
hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
#if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA)
arm64_hugetlb_cma_reserve();
#endif
/*
@ -563,27 +563,11 @@ void free_initmem(void)
unmap_kernel_range((u64)__init_begin, (u64)(__init_end - __init_begin));
}
/*
* Dump out memory limit information on panic.
*/
static int dump_mem_limit(struct notifier_block *self, unsigned long v, void *p)
void dump_mem_limit(void)
{
if (memory_limit != PHYS_ADDR_MAX) {
pr_emerg("Memory Limit: %llu MB\n", memory_limit >> 20);
} else {
pr_emerg("Memory Limit: none\n");
}
return 0;
}
static struct notifier_block mem_limit_notifier = {
.notifier_call = dump_mem_limit,
};
static int __init register_mem_limit_dumper(void)
{
atomic_notifier_chain_register(&panic_notifier_list,
&mem_limit_notifier);
return 0;
}
__initcall(register_mem_limit_dumper);

1
arch/riscv/include/asm/vdso/gettimeofday.h
View File

@ -4,6 +4,7 @@
#ifndef __ASSEMBLY__
#include <asm/barrier.h>
#include <asm/unistd.h>
#include <asm/csr.h>
#include <uapi/linux/time.h>

108
drivers/acpi/arm64/iort.c
View File

@ -264,15 +264,31 @@ static acpi_status iort_match_node_callback(struct acpi_iort_node *node,
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT) {
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_device *adev = to_acpi_device_node(dev->fwnode);
struct acpi_device *adev;
struct acpi_iort_named_component *ncomp;
struct device *nc_dev = dev;
/*
* Walk the device tree to find a device with an
* ACPI companion; there is no point in scanning
* IORT for a device matching a named component if
* the device does not have an ACPI companion to
* start with.
*/
do {
adev = ACPI_COMPANION(nc_dev);
if (adev)
break;
nc_dev = nc_dev->parent;
} while (nc_dev);
if (!adev)
goto out;
status = acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &buf);
if (ACPI_FAILURE(status)) {
dev_warn(dev, "Can't get device full path name\n");
dev_warn(nc_dev, "Can't get device full path name\n");
goto out;
}
@ -534,7 +550,6 @@ static struct acpi_iort_node *iort_find_dev_node(struct device *dev)
node = iort_get_iort_node(dev->fwnode);
if (node)
return node;
/*
* if not, then it should be a platform device defined in
* DSDT/SSDT (with Named Component node in IORT)
@ -543,32 +558,29 @@ static struct acpi_iort_node *iort_find_dev_node(struct device *dev)
iort_match_node_callback, dev);
}
/* Find a PCI root bus */
pbus = to_pci_dev(dev)->bus;
while (!pci_is_root_bus(pbus))
pbus = pbus->parent;
return iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX,
iort_match_node_callback, &pbus->dev);
}
/**
* iort_msi_map_rid() - Map a MSI requester ID for a device
* iort_msi_map_id() - Map a MSI input ID for a device
* @dev: The device for which the mapping is to be done.
* @req_id: The device requester ID.
* @input_id: The device input ID.
*
* Returns: mapped MSI RID on success, input requester ID otherwise
* Returns: mapped MSI ID on success, input ID otherwise
*/
u32 iort_msi_map_rid(struct device *dev, u32 req_id)
u32 iort_msi_map_id(struct device *dev, u32 input_id)
{
struct acpi_iort_node *node;
u32 dev_id;
node = iort_find_dev_node(dev);
if (!node)
return req_id;
return input_id;
iort_node_map_id(node, req_id, &dev_id, IORT_MSI_TYPE);
iort_node_map_id(node, input_id, &dev_id, IORT_MSI_TYPE);
return dev_id;
}
@ -625,13 +637,13 @@ static int __maybe_unused iort_find_its_base(u32 its_id, phys_addr_t *base)
/**
* iort_dev_find_its_id() - Find the ITS identifier for a device
* @dev: The device.
* @req_id: Device's requester ID
* @id: Device's ID
* @idx: Index of the ITS identifier list.
* @its_id: ITS identifier.
*
* Returns: 0 on success, appropriate error value otherwise
*/
static int iort_dev_find_its_id(struct device *dev, u32 req_id,
static int iort_dev_find_its_id(struct device *dev, u32 id,
unsigned int idx, int *its_id)
{
struct acpi_iort_its_group *its;
@ -641,7 +653,7 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id,
if (!node)
return -ENXIO;
node = iort_node_map_id(node, req_id, NULL, IORT_MSI_TYPE);
node = iort_node_map_id(node, id, NULL, IORT_MSI_TYPE);
if (!node)
return -ENXIO;
@ -664,19 +676,20 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id,
*
* Returns: the MSI domain for this device, NULL otherwise
*/
struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id)
struct irq_domain *iort_get_device_domain(struct device *dev, u32 id,
enum irq_domain_bus_token bus_token)
{
struct fwnode_handle *handle;
int its_id;
if (iort_dev_find_its_id(dev, req_id, 0, &its_id))
if (iort_dev_find_its_id(dev, id, 0, &its_id))
return NULL;
handle = iort_find_domain_token(its_id);
if (!handle)
return NULL;
return irq_find_matching_fwnode(handle, DOMAIN_BUS_PCI_MSI);
return irq_find_matching_fwnode(handle, bus_token);
}
static void iort_set_device_domain(struct device *dev,
@ -965,19 +978,54 @@ static void iort_named_component_init(struct device *dev,
nc->node_flags);
}
static int iort_nc_iommu_map(struct device *dev, struct acpi_iort_node *node)
{
struct acpi_iort_node *parent;
int err = -ENODEV, i = 0;
u32 streamid = 0;
do {
parent = iort_node_map_platform_id(node, &streamid,
IORT_IOMMU_TYPE,
i++);
if (parent)
err = iort_iommu_xlate(dev, parent, streamid);
} while (parent && !err);
return err;
}
static int iort_nc_iommu_map_id(struct device *dev,
struct acpi_iort_node *node,
const u32 *in_id)
{
struct acpi_iort_node *parent;
u32 streamid;
parent = iort_node_map_id(node, *in_id, &streamid, IORT_IOMMU_TYPE);
if (parent)
return iort_iommu_xlate(dev, parent, streamid);
return -ENODEV;
}
/**
* iort_iommu_configure - Set-up IOMMU configuration for a device.
* iort_iommu_configure_id - Set-up IOMMU configuration for a device.
*
* @dev: device to configure
* @id_in: optional input id const value pointer
*
* Returns: iommu_ops pointer on configuration success
* NULL on configuration failure
*/
const struct iommu_ops *iort_iommu_configure(struct device *dev)
const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
const u32 *id_in)
{
struct acpi_iort_node *node, *parent;
struct acpi_iort_node *node;
const struct iommu_ops *ops;
u32 streamid = 0;
int err = -ENODEV;
/*
@ -1006,21 +1054,13 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
if (fwspec && iort_pci_rc_supports_ats(node))
fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS;
} else {
int i = 0;
node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
iort_match_node_callback, dev);
if (!node)
return NULL;
do {
parent = iort_node_map_platform_id(node, &streamid,
IORT_IOMMU_TYPE,
i++);
if (parent)
err = iort_iommu_xlate(dev, parent, streamid);
} while (parent && !err);
err = id_in ? iort_nc_iommu_map_id(dev, node, id_in) :
iort_nc_iommu_map(dev, node);
if (!err)
iort_named_component_init(dev, node);
@ -1045,6 +1085,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
return ops;
}
#else
static inline const struct iommu_ops *iort_fwspec_iommu_ops(struct device *dev)
{ return NULL; }
@ -1053,7 +1094,8 @@ static inline int iort_add_device_replay(const struct iommu_ops *ops,
{ return 0; }
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
{ return 0; }
const struct iommu_ops *iort_iommu_configure(struct device *dev)
const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
const u32 *input_id)
{ return NULL; }
#endif

8
drivers/acpi/scan.c
View File

@ -1457,8 +1457,10 @@ int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
* acpi_dma_configure - Set-up DMA configuration for the device.
* @dev: The pointer to the device
* @attr: device dma attributes
* @input_id: input device id const value pointer
*/
int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr)
int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
const u32 *input_id)
{
const struct iommu_ops *iommu;
u64 dma_addr = 0, size = 0;
@ -1470,7 +1472,7 @@ int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr)
iort_dma_setup(dev, &dma_addr, &size);
iommu = iort_iommu_configure(dev);
iommu = iort_iommu_configure_id(dev, input_id);
if (PTR_ERR(iommu) == -EPROBE_DEFER)
return -EPROBE_DEFER;
@ -1479,7 +1481,7 @@ int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr)
return 0;
}
EXPORT_SYMBOL_GPL(acpi_dma_configure);
EXPORT_SYMBOL_GPL(acpi_dma_configure_id);
static void acpi_init_coherency(struct acpi_device *adev)
{

31
drivers/bus/fsl-mc/dprc-driver.c
View File

@ -592,6 +592,7 @@ static int dprc_probe(struct fsl_mc_device *mc_dev)
bool mc_io_created = false;
bool msi_domain_set = false;
u16 major_ver, minor_ver;
struct irq_domain *mc_msi_domain;
if (!is_fsl_mc_bus_dprc(mc_dev))
return -EINVAL;
@ -621,31 +622,15 @@ static int dprc_probe(struct fsl_mc_device *mc_dev)
return error;
mc_io_created = true;
}
/*
* Inherit parent MSI domain:
*/
dev_set_msi_domain(&mc_dev->dev,
dev_get_msi_domain(parent_dev));
msi_domain_set = true;
mc_msi_domain = fsl_mc_find_msi_domain(&mc_dev->dev);
if (!mc_msi_domain) {
dev_warn(&mc_dev->dev,
"WARNING: MC bus without interrupt support\n");
} else {
/*
* This is a root DPRC
*/
struct irq_domain *mc_msi_domain;
if (dev_is_fsl_mc(parent_dev))
return -EINVAL;
error = fsl_mc_find_msi_domain(parent_dev,
&mc_msi_domain);
if (error < 0) {
dev_warn(&mc_dev->dev,
"WARNING: MC bus without interrupt support\n");
} else {
dev_set_msi_domain(&mc_dev->dev, mc_msi_domain);
msi_domain_set = true;
}
dev_set_msi_domain(&mc_dev->dev, mc_msi_domain);
msi_domain_set = true;
}
error = dprc_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,

79
drivers/bus/fsl-mc/fsl-mc-bus.c
View File

@ -18,6 +18,8 @@
#include <linux/bitops.h>
#include <linux/msi.h>
#include <linux/dma-mapping.h>
#include <linux/acpi.h>
#include <linux/iommu.h>
#include "fsl-mc-private.h"
@ -38,6 +40,7 @@ struct fsl_mc {
struct fsl_mc_device *root_mc_bus_dev;
u8 num_translation_ranges;
struct fsl_mc_addr_translation_range *translation_ranges;
void *fsl_mc_regs;
};
/**
@ -56,6 +59,10 @@ struct fsl_mc_addr_translation_range {
phys_addr_t start_phys_addr;
};
#define FSL_MC_FAPR 0x28
#define MC_FAPR_PL BIT(18)
#define MC_FAPR_BMT BIT(17)
/**
* fsl_mc_bus_match - device to driver matching callback
* @dev: the fsl-mc device to match against
@ -118,11 +125,16 @@ static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
static int fsl_mc_dma_configure(struct device *dev)
{
struct device *dma_dev = dev;
struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
u32 input_id = mc_dev->icid;
while (dev_is_fsl_mc(dma_dev))
dma_dev = dma_dev->parent;
return of_dma_configure(dev, dma_dev->of_node, 0);
if (dev_of_node(dma_dev))
return of_dma_configure_id(dev, dma_dev->of_node, 0, &input_id);
return acpi_dma_configure_id(dev, DEV_DMA_COHERENT, &input_id);
}
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
@ -368,8 +380,8 @@ EXPORT_SYMBOL_GPL(fsl_mc_get_version);
/**
* fsl_mc_get_root_dprc - function to traverse to the root dprc
*/
static void fsl_mc_get_root_dprc(struct device *dev,
struct device **root_dprc_dev)
void fsl_mc_get_root_dprc(struct device *dev,
struct device **root_dprc_dev)
{
if (!dev) {
*root_dprc_dev = NULL;
@ -863,8 +875,11 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
struct fsl_mc_io *mc_io = NULL;
int container_id;
phys_addr_t mc_portal_phys_addr;
u32 mc_portal_size;
struct resource res;
u32 mc_portal_size, mc_stream_id;
struct resource *plat_res;
if (!iommu_present(&fsl_mc_bus_type))
return -EPROBE_DEFER;
mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
if (!mc)
@ -872,19 +887,33 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mc);
plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
mc->fsl_mc_regs = devm_ioremap_resource(&pdev->dev, plat_res);
if (IS_ERR(mc->fsl_mc_regs))
return PTR_ERR(mc->fsl_mc_regs);
if (IS_ENABLED(CONFIG_ACPI) && !dev_of_node(&pdev->dev)) {
mc_stream_id = readl(mc->fsl_mc_regs + FSL_MC_FAPR);
/*
* HW ORs the PL and BMT bit, places the result in bit 15 of
* the StreamID and ORs in the ICID. Calculate it accordingly.
*/
mc_stream_id = (mc_stream_id & 0xffff) |
((mc_stream_id & (MC_FAPR_PL | MC_FAPR_BMT)) ?
0x4000 : 0);
error = acpi_dma_configure_id(&pdev->dev, DEV_DMA_COHERENT,
&mc_stream_id);
if (error)
dev_warn(&pdev->dev, "failed to configure dma: %d.\n",
error);
}
/*
* Get physical address of MC portal for the root DPRC:
*/
error = of_address_to_resource(pdev->dev.of_node, 0, &res);
if (error < 0) {
dev_err(&pdev->dev,
"of_address_to_resource() failed for %pOF\n",
pdev->dev.of_node);
return error;
}
mc_portal_phys_addr = res.start;
mc_portal_size = resource_size(&res);
plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mc_portal_phys_addr = plat_res->start;
mc_portal_size = resource_size(plat_res);
error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr,
mc_portal_size, NULL,
FSL_MC_IO_ATOMIC_CONTEXT_PORTAL, &mc_io);
@ -901,11 +930,13 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
dev_info(&pdev->dev, "MC firmware version: %u.%u.%u\n",
mc_version.major, mc_version.minor, mc_version.revision);
error = get_mc_addr_translation_ranges(&pdev->dev,
&mc->translation_ranges,
&mc->num_translation_ranges);
if (error < 0)
goto error_cleanup_mc_io;
if (dev_of_node(&pdev->dev)) {
error = get_mc_addr_translation_ranges(&pdev->dev,
&mc->translation_ranges,
&mc->num_translation_ranges);
if (error < 0)
goto error_cleanup_mc_io;
}
error = dprc_get_container_id(mc_io, 0, &container_id);
if (error < 0) {
@ -932,6 +963,7 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
goto error_cleanup_mc_io;
mc->root_mc_bus_dev = mc_bus_dev;
mc_bus_dev->dev.fwnode = pdev->dev.fwnode;
return 0;
error_cleanup_mc_io:
@ -965,11 +997,18 @@ static const struct of_device_id fsl_mc_bus_match_table[] = {
MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table);
static const struct acpi_device_id fsl_mc_bus_acpi_match_table[] = {
{"NXP0008", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, fsl_mc_bus_acpi_match_table);
static struct platform_driver fsl_mc_bus_driver = {
.driver = {
.name = "fsl_mc_bus",
.pm = NULL,
.of_match_table = fsl_mc_bus_match_table,
.acpi_match_table = fsl_mc_bus_acpi_match_table,
},
.probe = fsl_mc_bus_probe,
.remove = fsl_mc_bus_remove,

36
drivers/bus/fsl-mc/fsl-mc-msi.c
View File

@ -13,6 +13,7 @@
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/msi.h>
#include <linux/acpi_iort.h>
#include "fsl-mc-private.h"
@ -177,23 +178,36 @@ struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
return domain;
}
int fsl_mc_find_msi_domain(struct device *mc_platform_dev,
struct irq_domain **mc_msi_domain)
struct irq_domain *fsl_mc_find_msi_domain(struct device *dev)
{
struct device *root_dprc_dev;
struct device *bus_dev;
struct irq_domain *msi_domain;
struct device_node *mc_of_node = mc_platform_dev->of_node;
struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
msi_domain = of_msi_get_domain(mc_platform_dev, mc_of_node,
DOMAIN_BUS_FSL_MC_MSI);
if (!msi_domain) {
pr_err("Unable to find fsl-mc MSI domain for %pOF\n",
mc_of_node);
fsl_mc_get_root_dprc(dev, &root_dprc_dev);
bus_dev = root_dprc_dev->parent;
return -ENOENT;
if (bus_dev->of_node) {
msi_domain = of_msi_map_get_device_domain(dev,
mc_dev->icid,
DOMAIN_BUS_FSL_MC_MSI);
/*
* if the msi-map property is missing assume that all the
* child containers inherit the domain from the parent
*/
if (!msi_domain)
msi_domain = of_msi_get_domain(bus_dev,
bus_dev->of_node,
DOMAIN_BUS_FSL_MC_MSI);
} else {
msi_domain = iort_get_device_domain(dev, mc_dev->icid,
DOMAIN_BUS_FSL_MC_MSI);
}
*mc_msi_domain = msi_domain;
return 0;
return msi_domain;
}
static void fsl_mc_msi_free_descs(struct device *dev)

6
drivers/bus/fsl-mc/fsl-mc-private.h
View File

@ -595,8 +595,7 @@ int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
void fsl_mc_msi_domain_free_irqs(struct device *dev);
int fsl_mc_find_msi_domain(struct device *mc_platform_dev,
struct irq_domain **mc_msi_domain);
struct irq_domain *fsl_mc_find_msi_domain(struct device *dev);
int fsl_mc_populate_irq_pool(struct fsl_mc_bus *mc_bus,
unsigned int irq_count);
@ -613,6 +612,9 @@ void fsl_destroy_mc_io(struct fsl_mc_io *mc_io);
bool fsl_mc_is_root_dprc(struct device *dev);
void fsl_mc_get_root_dprc(struct device *dev,
struct device **root_dprc_dev);
struct fsl_mc_device *fsl_mc_device_lookup(struct fsl_mc_obj_desc *obj_desc,
struct fsl_mc_device *mc_bus_dev);

85
drivers/iommu/of_iommu.c
View File

@ -118,6 +118,43 @@ static int of_iommu_xlate(struct device *dev,
return ret;
}
static int of_iommu_configure_dev_id(struct device_node *master_np,
struct device *dev,
const u32 *id)
{
struct of_phandle_args iommu_spec = { .args_count = 1 };
int err;
err = of_map_id(master_np, *id, "iommu-map",
"iommu-map-mask", &iommu_spec.np,
iommu_spec.args);
if (err)
return err == -ENODEV ? NO_IOMMU : err;
err = of_iommu_xlate(dev, &iommu_spec);
of_node_put(iommu_spec.np);
return err;
}
static int of_iommu_configure_dev(struct device_node *master_np,
struct device *dev)
{
struct of_phandle_args iommu_spec;
int err = NO_IOMMU, idx = 0;
while (!of_parse_phandle_with_args(master_np, "iommus",
"#iommu-cells",
idx, &iommu_spec)) {
err = of_iommu_xlate(dev, &iommu_spec);
of_node_put(iommu_spec.np);
idx++;
if (err)
break;
}
return err;
}
struct of_pci_iommu_alias_info {
struct device *dev;
struct device_node *np;
@ -126,38 +163,21 @@ struct of_pci_iommu_alias_info {
static int of_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
{
struct of_pci_iommu_alias_info *info = data;
struct of_phandle_args iommu_spec = { .args_count = 1 };
int err;
u32 input_id = alias;
err = of_map_rid(info->np, alias, "iommu-map", "iommu-map-mask",
&iommu_spec.np, iommu_spec.args);
if (err)
return err == -ENODEV ? NO_IOMMU : err;
err = of_iommu_xlate(info->dev, &iommu_spec);
of_node_put(iommu_spec.np);
return err;
return of_iommu_configure_dev_id(info->np, info->dev, &input_id);
}
static int of_fsl_mc_iommu_init(struct fsl_mc_device *mc_dev,
struct device_node *master_np)
static int of_iommu_configure_device(struct device_node *master_np,
struct device *dev, const u32 *id)
{
struct of_phandle_args iommu_spec = { .args_count = 1 };
int err;
err = of_map_rid(master_np, mc_dev->icid, "iommu-map",
"iommu-map-mask", &iommu_spec.np,
iommu_spec.args);
if (err)
return err == -ENODEV ? NO_IOMMU : err;
err = of_iommu_xlate(&mc_dev->dev, &iommu_spec);
of_node_put(iommu_spec.np);
return err;
return (id) ? of_iommu_configure_dev_id(master_np, dev, id) :
of_iommu_configure_dev(master_np, dev);
}
const struct iommu_ops *of_iommu_configure(struct device *dev,
struct device_node *master_np)
struct device_node *master_np,
const u32 *id)
{
const struct iommu_ops *ops = NULL;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
@ -188,21 +208,8 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
pci_request_acs();
err = pci_for_each_dma_alias(to_pci_dev(dev),
of_pci_iommu_init, &info);
} else if (dev_is_fsl_mc(dev)) {
err = of_fsl_mc_iommu_init(to_fsl_mc_device(dev), master_np);
} else {
struct of_phandle_args iommu_spec;
int idx = 0;
while (!of_parse_phandle_with_args(master_np, "iommus",
"#iommu-cells",
idx, &iommu_spec)) {
err = of_iommu_xlate(dev, &iommu_spec);
of_node_put(iommu_spec.np);
idx++;
if (err)
break;
}
err = of_iommu_configure_device(master_np, dev, id);
fwspec = dev_iommu_fwspec_get(dev);
if (!err && fwspec)

105
drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
View File

@ -7,6 +7,8 @@
*
*/
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/irq.h>
@ -23,6 +25,19 @@ static struct irq_chip its_msi_irq_chip = {
.irq_set_affinity = msi_domain_set_affinity
};
static u32 fsl_mc_msi_domain_get_msi_id(struct irq_domain *domain,
struct fsl_mc_device *mc_dev)
{
struct device_node *of_node;
u32 out_id;
of_node = irq_domain_get_of_node(domain);
out_id = of_node ? of_msi_map_id(&mc_dev->dev, of_node, mc_dev->icid) :
iort_msi_map_id(&mc_dev->dev, mc_dev->icid);
return out_id;
}
static int its_fsl_mc_msi_prepare(struct irq_domain *msi_domain,
struct device *dev,
int nvec, msi_alloc_info_t *info)
@ -43,7 +58,8 @@ static int its_fsl_mc_msi_prepare(struct irq_domain *msi_domain,
* NOTE: This device id corresponds to the IOMMU stream ID
* associated with the DPRC object (ICID).
*/
info->scratchpad[0].ul = mc_bus_dev->icid;
info->scratchpad[0].ul = fsl_mc_msi_domain_get_msi_id(msi_domain,
mc_bus_dev);
msi_info = msi_get_domain_info(msi_domain->parent);
/* Allocate at least 32 MSIs, and always as a power of 2 */
@ -66,12 +82,71 @@ static const struct of_device_id its_device_id[] = {
{},
};
static int __init its_fsl_mc_msi_init(void)
static void __init its_fsl_mc_msi_init_one(struct fwnode_handle *handle,
const char *name)
{
struct device_node *np;
struct irq_domain *parent;
struct irq_domain *mc_msi_domain;
parent = irq_find_matching_fwnode(handle, DOMAIN_BUS_NEXUS);
if (!parent || !msi_get_domain_info(parent)) {
pr_err("%s: unable to locate ITS domain\n", name);
return;
}
mc_msi_domain = fsl_mc_msi_create_irq_domain(handle,
&its_fsl_mc_msi_domain_info,
parent);
if (!mc_msi_domain) {
pr_err("%s: unable to create fsl-mc domain\n", name);
return;
}
pr_info("fsl-mc MSI: %s domain created\n", name);
}
#ifdef CONFIG_ACPI
static int __init
its_fsl_mc_msi_parse_madt(union acpi_subtable_headers *header,
const unsigned long end)
{
struct acpi_madt_generic_translator *its_entry;
struct fwnode_handle *dom_handle;
const char *node_name;
int err = 0;
its_entry = (struct acpi_madt_generic_translator *)header;
node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx",
(long)its_entry->base_address);
dom_handle = iort_find_domain_token(its_entry->translation_id);
if (!dom_handle) {
pr_err("%s: Unable to locate ITS domain handle\n", node_name);
err = -ENXIO;
goto out;
}
its_fsl_mc_msi_init_one(dom_handle, node_name);
out:
kfree(node_name);
return err;
}
static void __init its_fsl_mc_acpi_msi_init(void)
{
acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR,
its_fsl_mc_msi_parse_madt, 0);
}
#else
static inline void its_fsl_mc_acpi_msi_init(void) { }
#endif
static void __init its_fsl_mc_of_msi_init(void)
{
struct device_node *np;
for (np = of_find_matching_node(NULL, its_device_id); np;
np = of_find_matching_node(np, its_device_id)) {
if (!of_device_is_available(np))
@ -79,23 +154,15 @@ static int __init its_fsl_mc_msi_init(void)
if (!of_property_read_bool(np, "msi-controller"))
continue;
parent = irq_find_matching_host(np, DOMAIN_BUS_NEXUS);
if (!parent || !msi_get_domain_info(parent)) {
pr_err("%pOF: unable to locate ITS domain\n", np);
continue;
}
mc_msi_domain = fsl_mc_msi_create_irq_domain(
of_node_to_fwnode(np),
&its_fsl_mc_msi_domain_info,
parent);
if (!mc_msi_domain) {
pr_err("%pOF: unable to create fsl-mc domain\n", np);
continue;
}
pr_info("fsl-mc MSI: %pOF domain created\n", np);
its_fsl_mc_msi_init_one(of_node_to_fwnode(np),
np->full_name);
}
}
static int __init its_fsl_mc_msi_init(void)
{
its_fsl_mc_of_msi_init();
its_fsl_mc_acpi_msi_init();
return 0;
}

42
drivers/of/base.c
View File

@ -2201,15 +2201,15 @@ int of_find_last_cache_level(unsigned int cpu)
}
/**
* of_map_rid - Translate a requester ID through a downstream mapping.
* of_map_id - Translate an ID through a downstream mapping.
* @np: root complex device node.
* @rid: device requester ID to map.
* @id: device ID to map.
* @map_name: property name of the map to use.
* @map_mask_name: optional property name of the mask to use.
* @target: optional pointer to a target device node.
* @id_out: optional pointer to receive the translated ID.
*
* Given a device requester ID, look up the appropriate implementation-defined
* Given a device ID, look up the appropriate implementation-defined
* platform ID and/or the target device which receives transactions on that
* ID, as per the "iommu-map" and "msi-map" bindings. Either of @target or
* @id_out may be NULL if only the other is required. If @target points to
@ -2219,11 +2219,11 @@ int of_find_last_cache_level(unsigned int cpu)
*
* Return: 0 on success or a standard error code on failure.
*/
int of_map_rid(struct device_node *np, u32 rid,
int of_map_id(struct device_node *np, u32 id,
const char *map_name, const char *map_mask_name,
struct device_node **target, u32 *id_out)
{
u32 map_mask, masked_rid;
u32 map_mask, masked_id;
int map_len;
const __be32 *map = NULL;
@ -2235,7 +2235,7 @@ int of_map_rid(struct device_node *np, u32 rid,
if (target)
return -ENODEV;
/* Otherwise, no map implies no translation */
*id_out = rid;
*id_out = id;
return 0;
}
@ -2255,22 +2255,22 @@ int of_map_rid(struct device_node *np, u32 rid,
if (map_mask_name)
of_property_read_u32(np, map_mask_name, &map_mask);
masked_rid = map_mask & rid;
masked_id = map_mask & id;
for ( ; map_len > 0; map_len -= 4 * sizeof(*map), map += 4) {
struct device_node *phandle_node;
u32 rid_base = be32_to_cpup(map + 0);
u32 id_base = be32_to_cpup(map + 0);
u32 phandle = be32_to_cpup(map + 1);
u32 out_base = be32_to_cpup(map + 2);
u32 rid_len = be32_to_cpup(map + 3);
u32 id_len = be32_to_cpup(map + 3);
if (rid_base & ~map_mask) {
pr_err("%pOF: Invalid %s translation - %s-mask (0x%x) ignores rid-base (0x%x)\n",
if (id_base & ~map_mask) {
pr_err("%pOF: Invalid %s translation - %s-mask (0x%x) ignores id-base (0x%x)\n",
np, map_name, map_name,
map_mask, rid_base);
map_mask, id_base);
return -EFAULT;
}
if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
if (masked_id < id_base || masked_id >= id_base + id_len)
continue;
phandle_node = of_find_node_by_phandle(phandle);
@ -2288,20 +2288,20 @@ int of_map_rid(struct device_node *np, u32 rid,
}
if (id_out)
*id_out = masked_rid - rid_base + out_base;
*id_out = masked_id - id_base + out_base;
pr_debug("%pOF: %s, using mask %08x, rid-base: %08x, out-base: %08x, length: %08x, rid: %08x -> %08x\n",
np, map_name, map_mask, rid_base, out_base,
rid_len, rid, masked_rid - rid_base + out_base);
pr_debug("%pOF: %s, using mask %08x, id-base: %08x, out-base: %08x, length: %08x, id: %08x -> %08x\n",
np, map_name, map_mask, id_base, out_base,
id_len, id, masked_id - id_base + out_base);
return 0;
}
pr_info("%pOF: no %s translation for rid 0x%x on %pOF\n", np, map_name,
rid, target && *target ? *target : NULL);
pr_info("%pOF: no %s translation for id 0x%x on %pOF\n", np, map_name,
id, target && *target ? *target : NULL);
/* Bypasses translation */
if (id_out)
*id_out = rid;
*id_out = id;
return 0;
}
EXPORT_SYMBOL_GPL(of_map_rid);
EXPORT_SYMBOL_GPL(of_map_id);

8
drivers/of/device.c
View File

@ -78,6 +78,7 @@ int of_device_add(struct platform_device *ofdev)
* @np: Pointer to OF node having DMA configuration
* @force_dma: Whether device is to be set up by of_dma_configure() even if
* DMA capability is not explicitly described by firmware.
* @id: Optional const pointer value input id
*
* Try to get devices's DMA configuration from DT and update it
* accordingly.
@ -86,7 +87,8 @@ int of_device_add(struct platform_device *ofdev)
* can use a platform bus notifier and handle BUS_NOTIFY_ADD_DEVICE events
* to fix up DMA configuration.
*/
int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
int of_dma_configure_id(struct device *dev, struct device_node *np,
bool force_dma, const u32 *id)
{
u64 dma_addr, paddr, size = 0;
int ret;
@ -160,7 +162,7 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
dev_dbg(dev, "device is%sdma coherent\n",
coherent ? " " : " not ");
iommu = of_iommu_configure(dev, np);
iommu = of_iommu_configure(dev, np, id);
if (PTR_ERR(iommu) == -EPROBE_DEFER)
return -EPROBE_DEFER;
@ -171,7 +173,7 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
return 0;
}
EXPORT_SYMBOL_GPL(of_dma_configure);
EXPORT_SYMBOL_GPL(of_dma_configure_id);
int of_device_register(struct platform_device *pdev)
{

34
drivers/of/irq.c
View File

@ -576,55 +576,57 @@ err:
}
}
static u32 __of_msi_map_rid(struct device *dev, struct device_node **np,
u32 rid_in)
static u32 __of_msi_map_id(struct device *dev, struct device_node **np,
u32 id_in)
{
struct device *parent_dev;
u32 rid_out = rid_in;
u32 id_out = id_in;
/*
* Walk up the device parent links looking for one with a
* "msi-map" property.
*/
for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent)
if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map",
"msi-map-mask", np, &rid_out))
if (!of_map_id(parent_dev->of_node, id_in, "msi-map",
"msi-map-mask", np, &id_out))
break;
return rid_out;
return id_out;
}
/**
* of_msi_map_rid - Map a MSI requester ID for a device.
* of_msi_map_id - Map a MSI ID for a device.
* @dev: device for which the mapping is to be done.
* @msi_np: device node of the expected msi controller.
* @rid_in: unmapped MSI requester ID for the device.
* @id_in: unmapped MSI ID for the device.
*
* Walk up the device hierarchy looking for devices with a "msi-map"
* property. If found, apply the mapping to @rid_in.
* property. If found, apply the mapping to @id_in.
*
* Returns the mapped MSI requester ID.
* Returns the mapped MSI ID.
*/
u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in)
u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in)
{
return __of_msi_map_rid(dev, &msi_np, rid_in);
return __of_msi_map_id(dev, &msi_np, id_in);
}
/**
* of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain
* @dev: device for which the mapping is to be done.
* @rid: Requester ID for the device.
* @id: Device ID.
* @bus_token: Bus token
*
* Walk up the device hierarchy looking for devices with a "msi-map"
* property.
*
* Returns: the MSI domain for this device (or NULL on failure)
*/
struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 rid)
struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 id,
u32 bus_token)
{
struct device_node *np = NULL;
__of_msi_map_rid(dev, &np, rid);
return irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI);
__of_msi_map_id(dev, &np, id);
return irq_find_matching_host(np, bus_token);
}
/**

9
drivers/pci/msi.c
View File

@ -1535,8 +1535,8 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev)
pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid);
of_node = irq_domain_get_of_node(domain);
rid = of_node ? of_msi_map_rid(&pdev->dev, of_node, rid) :
iort_msi_map_rid(&pdev->dev, rid);
rid = of_node ? of_msi_map_id(&pdev->dev, of_node, rid) :
iort_msi_map_id(&pdev->dev, rid);
return rid;
}
@ -1556,9 +1556,10 @@ struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev)
u32 rid = pci_dev_id(pdev);
pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid);
dom = of_msi_map_get_device_domain(&pdev->dev, rid);
dom = of_msi_map_get_device_domain(&pdev->dev, rid, DOMAIN_BUS_PCI_MSI);
if (!dom)
dom = iort_get_device_domain(&pdev->dev, rid);
dom = iort_get_device_domain(&pdev->dev, rid,
DOMAIN_BUS_PCI_MSI);
return dom;
}
#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */

3
drivers/perf/arm_smmuv3_pmu.c
View File

@ -756,8 +756,7 @@ static int smmu_pmu_probe(struct platform_device *pdev)
.capabilities = PERF_PMU_CAP_NO_EXCLUDE,
};
res_0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
smmu_pmu->reg_base = devm_ioremap_resource(dev, res_0);
smmu_pmu->reg_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res_0);
if (IS_ERR(smmu_pmu->reg_base))
return PTR_ERR(smmu_pmu->reg_base);

5
drivers/vhost/vhost.c
View File

@ -2092,11 +2092,6 @@ static int get_indirect(struct vhost_virtqueue *vq,
return ret;
}
iov_iter_init(&from, READ, vq->indirect, ret, len);
/* We will use the result as an address to read from, so most
* architectures only need a compiler barrier here. */
read_barrier_depends();
count = len / sizeof desc;
/* Buffers are chained via a 16 bit next field, so
* we can have at most 2^16 of these. */

9
include/acpi/acpi_bus.h
View File

@ -588,8 +588,13 @@ bool acpi_dma_supported(struct acpi_device *adev);
enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
u64 *size);
int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr);
int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
const u32 *input_id);
static inline int acpi_dma_configure(struct device *dev,
enum dev_dma_attr attr)
{
return acpi_dma_configure_id(dev, attr, NULL);
}
struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
u64 address, bool check_children);
int acpi_is_root_bridge(acpi_handle);

1
include/asm-generic/Kbuild
View File

@ -45,6 +45,7 @@ mandatory-y += pci.h
mandatory-y += percpu.h
mandatory-y += pgalloc.h
mandatory-y += preempt.h
mandatory-y += rwonce.h
mandatory-y += sections.h
mandatory-y += serial.h
mandatory-y += shmparam.h

19
include/asm-generic/barrier.h
View File

@ -13,7 +13,7 @@
#ifndef __ASSEMBLY__
#include <linux/compiler.h>
#include <asm/rwonce.h>
#ifndef nop
#define nop() asm volatile ("nop")
@ -46,10 +46,6 @@
#define dma_wmb() wmb()
#endif
#ifndef read_barrier_depends
#define read_barrier_depends() do { } while (0)
#endif
#ifndef __smp_mb
#define __smp_mb() mb()
#endif
@ -62,10 +58,6 @@
#define __smp_wmb() wmb()
#endif
#ifndef __smp_read_barrier_depends
#define __smp_read_barrier_depends() read_barrier_depends()
#endif
#ifdef CONFIG_SMP
#ifndef smp_mb
@ -80,10 +72,6 @@
#define smp_wmb() __smp_wmb()
#endif
#ifndef smp_read_barrier_depends
#define smp_read_barrier_depends() __smp_read_barrier_depends()
#endif
#else /* !CONFIG_SMP */
#ifndef smp_mb
@ -98,10 +86,6 @@
#define smp_wmb() barrier()
#endif
#ifndef smp_read_barrier_depends
#define smp_read_barrier_depends() do { } while (0)
#endif
#endif /* CONFIG_SMP */
#ifndef __smp_store_mb
@ -196,7 +180,6 @@ do { \
#define virt_mb() __smp_mb()
#define virt_rmb() __smp_rmb()
#define virt_wmb() __smp_wmb()
#define virt_read_barrier_depends() __smp_read_barrier_depends()
#define virt_store_mb(var, value) __smp_store_mb(var, value)
#define virt_mb__before_atomic() __smp_mb__before_atomic()
#define virt_mb__after_atomic() __smp_mb__after_atomic()

90
include/asm-generic/rwonce.h Normal file
View File

@ -0,0 +1,90 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Prevent the compiler from merging or refetching reads or writes. The
* compiler is also forbidden from reordering successive instances of
* READ_ONCE and WRITE_ONCE, but only when the compiler is aware of some
* particular ordering. One way to make the compiler aware of ordering is to
* put the two invocations of READ_ONCE or WRITE_ONCE in different C
* statements.
*
* These two macros will also work on aggregate data types like structs or
* unions.
*
* Their two major use cases are: (1) Mediating communication between
* process-level code and irq/NMI handlers, all running on the same CPU,
* and (2) Ensuring that the compiler does not fold, spindle, or otherwise
* mutilate accesses that either do not require ordering or that interact
* with an explicit memory barrier or atomic instruction that provides the
* required ordering.
*/
#ifndef __ASM_GENERIC_RWONCE_H
#define __ASM_GENERIC_RWONCE_H
#ifndef __ASSEMBLY__
#include <linux/compiler_types.h>
#include <linux/kasan-checks.h>
#include <linux/kcsan-checks.h>
/*
* Yes, this permits 64-bit accesses on 32-bit architectures. These will
* actually be atomic in some cases (namely Armv7 + LPAE), but for others we
* rely on the access being split into 2x32-bit accesses for a 32-bit quantity
* (e.g. a virtual address) and a strong prevailing wind.
*/
#define compiletime_assert_rwonce_type(t) \
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
"Unsupported access size for {READ,WRITE}_ONCE().")
/*
* Use __READ_ONCE() instead of READ_ONCE() if you do not require any
* atomicity. Note that this may result in tears!
*/
#ifndef __READ_ONCE
#define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x))
#endif
#define READ_ONCE(x) \
({ \
compiletime_assert_rwonce_type(x); \
__READ_ONCE(x); \
})
#define __WRITE_ONCE(x, val) \
do { \
*(volatile typeof(x) *)&(x) = (val); \
} while (0)
#define WRITE_ONCE(x, val) \
do { \
compiletime_assert_rwonce_type(x); \
__WRITE_ONCE(x, val); \
} while (0)
static __no_sanitize_or_inline
unsigned long __read_once_word_nocheck(const void *addr)
{
return __READ_ONCE(*(unsigned long *)addr);
}
/*
* Use READ_ONCE_NOCHECK() instead of READ_ONCE() if you need to load a
* word from memory atomically but without telling KASAN/KCSAN. This is
* usually used by unwinding code when walking the stack of a running process.
*/
#define READ_ONCE_NOCHECK(x) \
({ \
compiletime_assert(sizeof(x) == sizeof(unsigned long), \
"Unsupported access size for READ_ONCE_NOCHECK()."); \
(typeof(x))__read_once_word_nocheck(&(x)); \
})
static __no_kasan_or_inline
unsigned long read_word_at_a_time(const void *addr)
{
kasan_check_read(addr, 1);
return *(unsigned long *)addr;
}
#endif /* __ASSEMBLY__ */
#endif /* __ASM_GENERIC_RWONCE_H */

55
include/asm-generic/tlb.h
View File

@ -512,6 +512,38 @@ static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vm
}
#endif
/*
* tlb_flush_{pte|pmd|pud|p4d}_range() adjust the tlb->start and tlb->end,
* and set corresponding cleared_*.
*/
static inline void tlb_flush_pte_range(struct mmu_gather *tlb,
unsigned long address, unsigned long size)
{
__tlb_adjust_range(tlb, address, size);
tlb->cleared_ptes = 1;
}
static inline void tlb_flush_pmd_range(struct mmu_gather *tlb,
unsigned long address, unsigned long size)
{
__tlb_adjust_range(tlb, address, size);
tlb->cleared_pmds = 1;
}
static inline void tlb_flush_pud_range(struct mmu_gather *tlb,
unsigned long address, unsigned long size)
{
__tlb_adjust_range(tlb, address, size);
tlb->cleared_puds = 1;
}
static inline void tlb_flush_p4d_range(struct mmu_gather *tlb,
unsigned long address, unsigned long size)
{
__tlb_adjust_range(tlb, address, size);
tlb->cleared_p4ds = 1;
}
#ifndef __tlb_remove_tlb_entry
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
#endif
@ -525,19 +557,17 @@ static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vm
*/
#define tlb_remove_tlb_entry(tlb, ptep, address) \
do { \
__tlb_adjust_range(tlb, address, PAGE_SIZE); \
tlb->cleared_ptes = 1; \
tlb_flush_pte_range(tlb, address, PAGE_SIZE); \
__tlb_remove_tlb_entry(tlb, ptep, address); \
} while (0)
#define tlb_remove_huge_tlb_entry(h, tlb, ptep, address) \
do { \
unsigned long _sz = huge_page_size(h); \
__tlb_adjust_range(tlb, address, _sz); \
if (_sz == PMD_SIZE) \
tlb->cleared_pmds = 1; \
tlb_flush_pmd_range(tlb, address, _sz); \
else if (_sz == PUD_SIZE) \
tlb->cleared_puds = 1; \
tlb_flush_pud_range(tlb, address, _sz); \
__tlb_remove_tlb_entry(tlb, ptep, address); \
} while (0)
@ -551,8 +581,7 @@ static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vm
#define tlb_remove_pmd_tlb_entry(tlb, pmdp, address) \
do { \
__tlb_adjust_range(tlb, address, HPAGE_PMD_SIZE); \
tlb->cleared_pmds = 1; \
tlb_flush_pmd_range(tlb, address, HPAGE_PMD_SIZE); \
__tlb_remove_pmd_tlb_entry(tlb, pmdp, address); \
} while (0)
@ -566,8 +595,7 @@ static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vm
#define tlb_remove_pud_tlb_entry(tlb, pudp, address) \
do { \
__tlb_adjust_range(tlb, address, HPAGE_PUD_SIZE); \
tlb->cleared_puds = 1; \
tlb_flush_pud_range(tlb, address, HPAGE_PUD_SIZE); \
__tlb_remove_pud_tlb_entry(tlb, pudp, address); \
} while (0)
@ -592,9 +620,8 @@ static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vm
#ifndef pte_free_tlb
#define pte_free_tlb(tlb, ptep, address) \
do { \
__tlb_adjust_range(tlb, address, PAGE_SIZE); \
tlb_flush_pmd_range(tlb, address, PAGE_SIZE); \
tlb->freed_tables = 1; \
tlb->cleared_pmds = 1; \
__pte_free_tlb(tlb, ptep, address); \
} while (0)
#endif
@ -602,9 +629,8 @@ static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vm
#ifndef pmd_free_tlb
#define pmd_free_tlb(tlb, pmdp, address) \
do { \
__tlb_adjust_range(tlb, address, PAGE_SIZE); \
tlb_flush_pud_range(tlb, address, PAGE_SIZE); \
tlb->freed_tables = 1; \
tlb->cleared_puds = 1; \
__pmd_free_tlb(tlb, pmdp, address); \
} while (0)
#endif
@ -612,9 +638,8 @@ static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vm
#ifndef pud_free_tlb
#define pud_free_tlb(tlb, pudp, address) \
do { \
__tlb_adjust_range(tlb, address, PAGE_SIZE); \
tlb_flush_p4d_range(tlb, address, PAGE_SIZE); \
tlb->freed_tables = 1; \
tlb->cleared_p4ds = 1; \
__pud_free_tlb(tlb, pudp, address); \
} while (0)
#endif

7
include/linux/acpi.h
View File

@ -905,6 +905,13 @@ static inline int acpi_dma_configure(struct device *dev,
return 0;
}
static inline int acpi_dma_configure_id(struct device *dev,
enum dev_dma_attr attr,
const u32 *input_id)
{
return 0;
}
#define ACPI_PTR(_ptr) (NULL)
static inline void acpi_device_set_enumerated(struct acpi_device *adev)

20
include/linux/acpi_iort.h
View File

@ -28,27 +28,29 @@ void iort_deregister_domain_token(int trans_id);
struct fwnode_handle *iort_find_domain_token(int trans_id);
#ifdef CONFIG_ACPI_IORT
void acpi_iort_init(void);
u32 iort_msi_map_rid(struct device *dev, u32 req_id);
struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id);
u32 iort_msi_map_id(struct device *dev, u32 id);
struct irq_domain *iort_get_device_domain(struct device *dev, u32 id,
enum irq_domain_bus_token bus_token);
void acpi_configure_pmsi_domain(struct device *dev);
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
/* IOMMU interface */
void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *size);
const struct iommu_ops *iort_iommu_configure(struct device *dev);
const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
const u32 *id_in);
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head);
#else
static inline void acpi_iort_init(void) { }
static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id)
{ return req_id; }
static inline struct irq_domain *iort_get_device_domain(struct device *dev,
u32 req_id)
static inline u32 iort_msi_map_id(struct device *dev, u32 id)
{ return id; }
static inline struct irq_domain *iort_get_device_domain(
struct device *dev, u32 id, enum irq_domain_bus_token bus_token)
{ return NULL; }
static inline void acpi_configure_pmsi_domain(struct device *dev) { }
/* IOMMU interface */
static inline void iort_dma_setup(struct device *dev, u64 *dma_addr,
u64 *size) { }
static inline const struct iommu_ops *iort_iommu_configure(
struct device *dev)
static inline const struct iommu_ops *iort_iommu_configure_id(
struct device *dev, const u32 *id_in)
{ return NULL; }
static inline
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)

44
include/linux/arm-smccc.h
View File

@ -81,6 +81,28 @@
ARM_SMCCC_SMC_32, \
0, 0x7fff)
/* Paravirtualised time calls (defined by ARM DEN0057A) */
#define ARM_SMCCC_HV_PV_TIME_FEATURES \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_STANDARD_HYP, \
0x20)
#define ARM_SMCCC_HV_PV_TIME_ST \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_STANDARD_HYP, \
0x21)
/*
* Return codes defined in ARM DEN 0070A
* ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C
*/
#define SMCCC_RET_SUCCESS 0
#define SMCCC_RET_NOT_SUPPORTED -1
#define SMCCC_RET_NOT_REQUIRED -2
#define SMCCC_RET_INVALID_PARAMETER -3
#ifndef __ASSEMBLY__
#include <linux/linkage.h>
@ -331,15 +353,6 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
*/
#define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
/*
* Return codes defined in ARM DEN 0070A
* ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C
*/
#define SMCCC_RET_SUCCESS 0
#define SMCCC_RET_NOT_SUPPORTED -1
#define SMCCC_RET_NOT_REQUIRED -2
#define SMCCC_RET_INVALID_PARAMETER -3
/*
* Like arm_smccc_1_1* but always returns SMCCC_RET_NOT_SUPPORTED.
* Used when the SMCCC conduit is not defined. The empty asm statement
@ -385,18 +398,5 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
method; \
})
/* Paravirtualised time calls (defined by ARM DEN0057A) */
#define ARM_SMCCC_HV_PV_TIME_FEATURES \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_STANDARD_HYP, \
0x20)
#define ARM_SMCCC_HV_PV_TIME_ST \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_STANDARD_HYP, \
0x21)
#endif /*__ASSEMBLY__*/
#endif /*__LINUX_ARM_SMCCC_H*/

134
include/linux/compiler.h
View File

@ -230,28 +230,6 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
# define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __LINE__)
#endif
/*
* Prevent the compiler from merging or refetching reads or writes. The
* compiler is also forbidden from reordering successive instances of
* READ_ONCE and WRITE_ONCE, but only when the compiler is aware of some
* particular ordering. One way to make the compiler aware of ordering is to
* put the two invocations of READ_ONCE or WRITE_ONCE in different C
* statements.
*
* These two macros will also work on aggregate data types like structs or
* unions.
*
* Their two major use cases are: (1) Mediating communication between
* process-level code and irq/NMI handlers, all running on the same CPU,
* and (2) Ensuring that the compiler does not fold, spindle, or otherwise
* mutilate accesses that either do not require ordering or that interact
* with an explicit memory barrier or atomic instruction that provides the
* required ordering.
*/
#include <asm/barrier.h>
#include <linux/kasan-checks.h>
#include <linux/kcsan-checks.h>
/**
* data_race - mark an expression as containing intentional data races
*
@ -272,65 +250,6 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
__v; \
})
/*
* Use __READ_ONCE() instead of READ_ONCE() if you do not require any
* atomicity or dependency ordering guarantees. Note that this may result
* in tears!
*/
#define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x))
#define __READ_ONCE_SCALAR(x) \
({ \
__unqual_scalar_typeof(x) __x = __READ_ONCE(x); \
smp_read_barrier_depends(); \
(typeof(x))__x; \
})
#define READ_ONCE(x) \
({ \
compiletime_assert_rwonce_type(x); \
__READ_ONCE_SCALAR(x); \
})
#define __WRITE_ONCE(x, val) \
do { \
*(volatile typeof(x) *)&(x) = (val); \
} while (0)
#define WRITE_ONCE(x, val) \
do { \
compiletime_assert_rwonce_type(x); \
__WRITE_ONCE(x, val); \
} while (0)
static __no_sanitize_or_inline
unsigned long __read_once_word_nocheck(const void *addr)
{
return __READ_ONCE(*(unsigned long *)addr);
}
/*
* Use READ_ONCE_NOCHECK() instead of READ_ONCE() if you need to load a
* word from memory atomically but without telling KASAN/KCSAN. This is
* usually used by unwinding code when walking the stack of a running process.
*/
#define READ_ONCE_NOCHECK(x) \
({ \
unsigned long __x; \
compiletime_assert(sizeof(x) == sizeof(__x), \
"Unsupported access size for READ_ONCE_NOCHECK()."); \
__x = __read_once_word_nocheck(&(x)); \
smp_read_barrier_depends(); \
(typeof(x))__x; \
})
static __no_kasan_or_inline
unsigned long read_word_at_a_time(const void *addr)
{
kasan_check_read(addr, 1);
return *(unsigned long *)addr;
}
#endif /* __KERNEL__ */
/*
@ -354,57 +273,6 @@ static inline void *offset_to_ptr(const int *off)
#endif /* __ASSEMBLY__ */
/* Compile time object size, -1 for unknown */
#ifndef __compiletime_object_size
# define __compiletime_object_size(obj) -1
#endif
#ifndef __compiletime_warning
# define __compiletime_warning(message)
#endif
#ifndef __compiletime_error
# define __compiletime_error(message)
#endif
#ifdef __OPTIMIZE__
# define __compiletime_assert(condition, msg, prefix, suffix) \
do { \
extern void prefix ## suffix(void) __compiletime_error(msg); \
if (!(condition)) \
prefix ## suffix(); \
} while (0)
#else
# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)
#endif
#define _compiletime_assert(condition, msg, prefix, suffix) \
__compiletime_assert(condition, msg, prefix, suffix)
/**
* compiletime_assert - break build and emit msg if condition is false
* @condition: a compile-time constant condition to check
* @msg: a message to emit if condition is false
*
* In tradition of POSIX assert, this macro will break the build if the
* supplied condition is *false*, emitting the supplied error message if the
* compiler has support to do so.
*/
#define compiletime_assert(condition, msg) \
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
#define compiletime_assert_atomic_type(t) \
compiletime_assert(__native_word(t), \
"Need native word sized stores/loads for atomicity.")
/*
* Yes, this permits 64-bit accesses on 32-bit architectures. These will
* actually be atomic in some cases (namely Armv7 + LPAE), but for others we
* rely on the access being split into 2x32-bit accesses for a 32-bit quantity
* (e.g. a virtual address) and a strong prevailing wind.
*/
#define compiletime_assert_rwonce_type(t) \
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
"Unsupported access size for {READ,WRITE}_ONCE().")
/* &a[0] degrades to a pointer: a different type from an array */
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
@ -414,4 +282,6 @@ static inline void *offset_to_ptr(const int *off)
*/
#define prevent_tail_call_optimization() mb()
#include <asm/rwonce.h>
#endif /* __LINUX_COMPILER_H */

41
include/linux/compiler_types.h
View File

@ -275,6 +275,47 @@ struct ftrace_likely_data {
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
/* Compile time object size, -1 for unknown */
#ifndef __compiletime_object_size
# define __compiletime_object_size(obj) -1
#endif
#ifndef __compiletime_warning
# define __compiletime_warning(message)
#endif
#ifndef __compiletime_error
# define __compiletime_error(message)
#endif
#ifdef __OPTIMIZE__
# define __compiletime_assert(condition, msg, prefix, suffix) \
do { \
extern void prefix ## suffix(void) __compiletime_error(msg); \
if (!(condition)) \
prefix ## suffix(); \
} while (0)
#else
# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)
#endif
#define _compiletime_assert(condition, msg, prefix, suffix) \
__compiletime_assert(condition, msg, prefix, suffix)
/**
* compiletime_assert - break build and emit msg if condition is false
* @condition: a compile-time constant condition to check
* @msg: a message to emit if condition is false
*
* In tradition of POSIX assert, this macro will break the build if the
* supplied condition is *false*, emitting the supplied error message if the
* compiler has support to do so.
*/
#define compiletime_assert(condition, msg) \
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
#define compiletime_assert_atomic_type(t) \
compiletime_assert(__native_word(t), \
"Need native word sized stores/loads for atomicity.")
/* Helpers for emitting diagnostics in pragmas. */
#ifndef __diag
#define __diag(string)

2
include/linux/nospec.h
View File

@ -5,6 +5,8 @@
#ifndef _LINUX_NOSPEC_H
#define _LINUX_NOSPEC_H
#include <linux/compiler.h>
#include <asm/barrier.h>
struct task_struct;

4
include/linux/of.h
View File

@ -554,7 +554,7 @@ bool of_console_check(struct device_node *dn, char *name, int index);
extern int of_cpu_node_to_id(struct device_node *np);
int of_map_rid(struct device_node *np, u32 rid,
int of_map_id(struct device_node *np, u32 id,
const char *map_name, const char *map_mask_name,
struct device_node **target, u32 *id_out);
@ -978,7 +978,7 @@ static inline int of_cpu_node_to_id(struct device_node *np)
return -ENODEV;
}
static inline int of_map_rid(struct device_node *np, u32 rid,
static inline int of_map_id(struct device_node *np, u32 id,
const char *map_name, const char *map_mask_name,
struct device_node **target, u32 *id_out)
{

16
include/linux/of_device.h
View File

@ -55,9 +55,15 @@ static inline struct device_node *of_cpu_device_node_get(int cpu)
return of_node_get(cpu_dev->of_node);
}
int of_dma_configure(struct device *dev,
int of_dma_configure_id(struct device *dev,
struct device_node *np,
bool force_dma);
bool force_dma, const u32 *id);
static inline int of_dma_configure(struct device *dev,
struct device_node *np,
bool force_dma)
{
return of_dma_configure_id(dev, np, force_dma, NULL);
}
#else /* CONFIG_OF */
static inline int of_driver_match_device(struct device *dev,
@ -106,6 +112,12 @@ static inline struct device_node *of_cpu_device_node_get(int cpu)
return NULL;
}
static inline int of_dma_configure_id(struct device *dev,
struct device_node *np,
bool force_dma)
{
return 0;
}
static inline int of_dma_configure(struct device *dev,
struct device_node *np,
bool force_dma)

6
include/linux/of_iommu.h
View File

@ -13,7 +13,8 @@ extern int of_get_dma_window(struct device_node *dn, const char *prefix,
size_t *size);
extern const struct iommu_ops *of_iommu_configure(struct device *dev,
struct device_node *master_np);
struct device_node *master_np,
const u32 *id);
#else
@ -25,7 +26,8 @@ static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
}
static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
struct device_node *master_np)
struct device_node *master_np,
const u32 *id)
{
return NULL;
}

13
include/linux/of_irq.h
View File

@ -52,9 +52,10 @@ extern struct irq_domain *of_msi_get_domain(struct device *dev,
struct device_node *np,
enum irq_domain_bus_token token);
extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
u32 rid);
u32 id,
u32 bus_token);
extern void of_msi_configure(struct device *dev, struct device_node *np);
u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in);
u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
#else
static inline int of_irq_count(struct device_node *dev)
{
@ -85,17 +86,17 @@ static inline struct irq_domain *of_msi_get_domain(struct device *dev,
return NULL;
}
static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
u32 rid)
u32 id, u32 bus_token)
{
return NULL;
}
static inline void of_msi_configure(struct device *dev, struct device_node *np)
{
}
static inline u32 of_msi_map_rid(struct device *dev,
struct device_node *msi_np, u32 rid_in)
static inline u32 of_msi_map_id(struct device *dev,
struct device_node *msi_np, u32 id_in)
{
return rid_in;
return id_in;
}
#endif

2
include/linux/percpu-refcount.h
View File

@ -155,7 +155,7 @@ static inline bool __ref_is_percpu(struct percpu_ref *ref,
* between contaminating the pointer value, meaning that
* READ_ONCE() is required when fetching it.
*
* The smp_read_barrier_depends() implied by READ_ONCE() pairs
* The dependency ordering from the READ_ONCE() pairs
* with smp_store_release() in __percpu_ref_switch_to_percpu().
*/
percpu_ptr = READ_ONCE(ref->percpu_count_ptr);

2
include/linux/ptr_ring.h
View File

@ -107,7 +107,7 @@ static inline int __ptr_ring_produce(struct ptr_ring *r, void *ptr)
return -ENOSPC;
/* Make sure the pointer we are storing points to a valid data. */
/* Pairs with smp_read_barrier_depends in __ptr_ring_consume. */
/* Pairs with the dependency ordering in __ptr_ring_consume. */
smp_wmb();
WRITE_ONCE(r->queue[r->producer++], ptr);

28
include/linux/sched_clock.h
View File

@ -6,6 +6,34 @@
#define LINUX_SCHED_CLOCK
#ifdef CONFIG_GENERIC_SCHED_CLOCK
/**
* struct clock_read_data - data required to read from sched_clock()
*
* @epoch_ns: sched_clock() value at last update
* @epoch_cyc: Clock cycle value at last update.
* @sched_clock_mask: Bitmask for two's complement subtraction of non 64bit
* clocks.
* @read_sched_clock: Current clock source (or dummy source when suspended).
* @mult: Multipler for scaled math conversion.
* @shift: Shift value for scaled math conversion.
*
* Care must be taken when updating this structure; it is read by
* some very hot code paths. It occupies <=40 bytes and, when combined
* with the seqcount used to synchronize access, comfortably fits into
* a 64 byte cache line.
*/
struct clock_read_data {
u64 epoch_ns;
u64 epoch_cyc;
u64 sched_clock_mask;
u64 (*read_sched_clock)(void);
u32 mult;
u32 shift;
};
extern struct clock_read_data *sched_clock_read_begin(unsigned int *seq);
extern int sched_clock_read_retry(unsigned int seq);
extern void generic_sched_clock_init(void);
extern void sched_clock_register(u64 (*read)(void), int bits,

23
include/uapi/linux/perf_event.h
View File

@ -532,9 +532,10 @@ struct perf_event_mmap_page {
cap_bit0_is_deprecated : 1, /* Always 1, signals that bit 0 is zero */
cap_user_rdpmc : 1, /* The RDPMC instruction can be used to read counts */
cap_user_time : 1, /* The time_* fields are used */
cap_user_time : 1, /* The time_{shift,mult,offset} fields are used */
cap_user_time_zero : 1, /* The time_zero field is used */
cap_____res : 59;
cap_user_time_short : 1, /* the time_{cycle,mask} fields are used */
cap_____res : 58;
};
};
@ -593,13 +594,29 @@ struct perf_event_mmap_page {
* ((rem * time_mult) >> time_shift);
*/
__u64 time_zero;
__u32 size; /* Header size up to __reserved[] fields. */
__u32 __reserved_1;
/*
* If cap_usr_time_short, the hardware clock is less than 64bit wide
* and we must compute the 'cyc' value, as used by cap_usr_time, as:
*
* cyc = time_cycles + ((cyc - time_cycles) & time_mask)
*
* NOTE: this form is explicitly chosen such that cap_usr_time_short
* is a correction on top of cap_usr_time, and code that doesn't
* know about cap_usr_time_short still works under the assumption
* the counter doesn't wrap.
*/
__u64 time_cycles;
__u64 time_mask;
/*
* Hole for extension of the self monitor capabilities
*/
__u8 __reserved[118*8+4]; /* align to 1k. */
__u8 __reserved[116*8]; /* align to 1k. */
/*
* Control data for the mmap() data buffer.

1
include/vdso/datapage.h
View File

@ -109,6 +109,7 @@ struct vdso_data {
* relocation, and this is what we need.
*/
extern struct vdso_data _vdso_data[CS_BASES] __attribute__((visibility("hidden")));
extern struct vdso_data _timens_data[CS_BASES] __attribute__((visibility("hidden")));
/*
* The generic vDSO implementation requires that gettimeofday.h

1
kernel/crash_core.c
View File

@ -413,6 +413,7 @@ static int __init crash_save_vmcoreinfo_init(void)
VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
VMCOREINFO_STRUCT_SIZE(mem_section);
VMCOREINFO_OFFSET(mem_section, section_mem_map);
VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
#endif
VMCOREINFO_STRUCT_SIZE(page);
VMCOREINFO_STRUCT_SIZE(pglist_data);

41
kernel/time/sched_clock.c
View File

@ -19,31 +19,6 @@
#include "timekeeping.h"
/**
* struct clock_read_data - data required to read from sched_clock()
*
* @epoch_ns: sched_clock() value at last update
* @epoch_cyc: Clock cycle value at last update.
* @sched_clock_mask: Bitmask for two's complement subtraction of non 64bit
* clocks.
* @read_sched_clock: Current clock source (or dummy source when suspended).
* @mult: Multipler for scaled math conversion.
* @shift: Shift value for scaled math conversion.
*
* Care must be taken when updating this structure; it is read by
* some very hot code paths. It occupies <=40 bytes and, when combined
* with the seqcount used to synchronize access, comfortably fits into
* a 64 byte cache line.
*/
struct clock_read_data {
u64 epoch_ns;
u64 epoch_cyc;
u64 sched_clock_mask;
u64 (*read_sched_clock)(void);
u32 mult;
u32 shift;
};
/**
* struct clock_data - all data needed for sched_clock() (including
* registration of a new clock source)
@ -93,6 +68,17 @@ static inline u64 notrace cyc_to_ns(u64 cyc, u32 mult, u32 shift)
return (cyc * mult) >> shift;
}
struct clock_read_data *sched_clock_read_begin(unsigned int *seq)
{
*seq = raw_read_seqcount_latch(&cd.seq);
return cd.read_data + (*seq & 1);
}
int sched_clock_read_retry(unsigned int seq)
{
return read_seqcount_retry(&cd.seq, seq);
}
unsigned long long notrace sched_clock(void)
{
u64 cyc, res;
@ -100,13 +86,12 @@ unsigned long long notrace sched_clock(void)
struct clock_read_data *rd;
do {
seq = raw_read_seqcount(&cd.seq);
rd = cd.read_data + (seq & 1);
rd = sched_clock_read_begin(&seq);
cyc = (rd->read_sched_clock() - rd->epoch_cyc) &
rd->sched_clock_mask;
res = rd->epoch_ns + cyc_to_ns(cyc, rd->mult, rd->shift);
} while (read_seqcount_retry(&cd.seq, seq));
} while (sched_clock_read_retry(seq));
return res;
}

2
mm/memory.c
View File

@ -437,7 +437,7 @@ int __pte_alloc(struct mm_struct *mm, pmd_t *pmd)
* of a chain of data-dependent loads, meaning most CPUs (alpha
* being the notable exception) will already guarantee loads are
* seen in-order. See the alpha page table accessors for the
* smp_read_barrier_depends() barriers in page table walking code.
* smp_rmb() barriers in page table walking code.
*/
smp_wmb(); /* Could be smp_wmb__xxx(before|after)_spin_lock */

9
scripts/checkpatch.pl
View File

@ -5903,8 +5903,7 @@ sub process {
my $barriers = qr{
mb|
rmb|
wmb|
read_barrier_depends
wmb
}x;
my $barrier_stems = qr{
mb__before_atomic|
@ -5953,12 +5952,6 @@ sub process {
}
}
# check for smp_read_barrier_depends and read_barrier_depends
if (!$file && $line =~ /\b(smp_|)read_barrier_depends\s*\(/) {
WARN("READ_BARRIER_DEPENDS",
"$1read_barrier_depends should only be used in READ_ONCE or DEC Alpha code\n" . $herecurr);
}
# check of hardware specific defines
if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
CHK("ARCH_DEFINES",

6
scripts/recordmcount.c
View File

@ -434,6 +434,11 @@ static int arm_is_fake_mcount(Elf32_Rel const *rp)
return 1;
}
static int arm64_is_fake_mcount(Elf64_Rel const *rp)
{
return ELF64_R_TYPE(w(rp->r_info)) != R_AARCH64_CALL26;
}
/* 64-bit EM_MIPS has weird ELF64_Rela.r_info.
* http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf
* We interpret Table 29 Relocation Operation (Elf64_Rel, Elf64_Rela) [p.40]
@ -547,6 +552,7 @@ static int do_file(char const *const fname)
make_nop = make_nop_arm64;
rel_type_nop = R_AARCH64_NONE;
ideal_nop = ideal_nop4_arm64;
is_fake_mcount64 = arm64_is_fake_mcount;
break;
case EM_IA_64: reltype = R_IA64_IMM64; break;
case EM_MIPS: /* reltype: e_class */ break;

3
tools/bpf/Makefile
View File

@ -9,7 +9,8 @@ MAKE = make
INSTALL ?= install
CFLAGS += -Wall -O2
CFLAGS += -D__EXPORTED_HEADERS__ -I$(srctree)/include/uapi -I$(srctree)/include
CFLAGS += -D__EXPORTED_HEADERS__ -I$(srctree)/tools/include/uapi \
-I$(srctree)/tools/include
# This will work when bpf is built in tools env. where srctree
# isn't set and when invoked from selftests build, where srctree

90
tools/include/uapi/linux/filter.h Normal file
View File

@ -0,0 +1,90 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Linux Socket Filter Data Structures
*/
#ifndef __LINUX_FILTER_H__
#define __LINUX_FILTER_H__
#include <linux/types.h>
#include <linux/bpf_common.h>
/*
* Current version of the filter code architecture.
*/
#define BPF_MAJOR_VERSION 1
#define BPF_MINOR_VERSION 1
/*
* Try and keep these values and structures similar to BSD, especially
* the BPF code definitions which need to match so you can share filters
*/
struct sock_filter { /* Filter block */
__u16 code; /* Actual filter code */
__u8 jt; /* Jump true */
__u8 jf; /* Jump false */
__u32 k; /* Generic multiuse field */
};
struct sock_fprog { /* Required for SO_ATTACH_FILTER. */
unsigned short len; /* Number of filter blocks */
struct sock_filter *filter;
};
/* ret - BPF_K and BPF_X also apply */
#define BPF_RVAL(code) ((code) & 0x18)
#define BPF_A 0x10
/* misc */
#define BPF_MISCOP(code) ((code) & 0xf8)
#define BPF_TAX 0x00
#define BPF_TXA 0x80
/*
* Macros for filter block array initializers.
*/
#ifndef BPF_STMT
#define BPF_STMT(code, k) { (unsigned short)(code), 0, 0, k }
#endif
#ifndef BPF_JUMP
#define BPF_JUMP(code, k, jt, jf) { (unsigned short)(code), jt, jf, k }
#endif
/*
* Number of scratch memory words for: BPF_ST and BPF_STX
*/
#define BPF_MEMWORDS 16
/* RATIONALE. Negative offsets are invalid in BPF.
We use them to reference ancillary data.
Unlike introduction new instructions, it does not break
existing compilers/optimizers.
*/
#define SKF_AD_OFF (-0x1000)
#define SKF_AD_PROTOCOL 0
#define SKF_AD_PKTTYPE 4
#define SKF_AD_IFINDEX 8
#define SKF_AD_NLATTR 12
#define SKF_AD_NLATTR_NEST 16
#define SKF_AD_MARK 20
#define SKF_AD_QUEUE 24
#define SKF_AD_HATYPE 28
#define SKF_AD_RXHASH 32
#define SKF_AD_CPU 36
#define SKF_AD_ALU_XOR_X 40
#define SKF_AD_VLAN_TAG 44
#define SKF_AD_VLAN_TAG_PRESENT 48
#define SKF_AD_PAY_OFFSET 52
#define SKF_AD_RANDOM 56
#define SKF_AD_VLAN_TPID 60
#define SKF_AD_MAX 64
#define SKF_NET_OFF (-0x100000)
#define SKF_LL_OFF (-0x200000)
#define BPF_NET_OFF SKF_NET_OFF
#define BPF_LL_OFF SKF_LL_OFF
#endif /* __LINUX_FILTER_H__ */

23
tools/include/uapi/linux/perf_event.h
View File

@ -532,9 +532,10 @@ struct perf_event_mmap_page {
cap_bit0_is_deprecated : 1, /* Always 1, signals that bit 0 is zero */
cap_user_rdpmc : 1, /* The RDPMC instruction can be used to read counts */
cap_user_time : 1, /* The time_* fields are used */
cap_user_time : 1, /* The time_{shift,mult,offset} fields are used */
cap_user_time_zero : 1, /* The time_zero field is used */
cap_____res : 59;
cap_user_time_short : 1, /* the time_{cycle,mask} fields are used */
cap_____res : 58;
};
};
@ -593,13 +594,29 @@ struct perf_event_mmap_page {
* ((rem * time_mult) >> time_shift);
*/
__u64 time_zero;
__u32 size; /* Header size up to __reserved[] fields. */
__u32 __reserved_1;
/*
* If cap_usr_time_short, the hardware clock is less than 64bit wide
* and we must compute the 'cyc' value, as used by cap_usr_time, as:
*
* cyc = time_cycles + ((cyc - time_cycles) & time_mask)
*
* NOTE: this form is explicitly chosen such that cap_usr_time_short
* is a correction on top of cap_usr_time, and code that doesn't
* know about cap_usr_time_short still works under the assumption
* the counter doesn't wrap.
*/
__u64 time_cycles;
__u64 time_mask;
/*
* Hole for extension of the self monitor capabilities
*/
__u8 __reserved[118*8+4]; /* align to 1k. */
__u8 __reserved[116*8]; /* align to 1k. */
/*
* Control data for the mmap() data buffer.

26
tools/memory-model/Documentation/explanation.txt
View File

@ -1122,12 +1122,10 @@ maintain at least the appearance of FIFO order.
In practice, this difficulty is solved by inserting a special fence
between P1's two loads when the kernel is compiled for the Alpha
architecture. In fact, as of version 4.15, the kernel automatically
adds this fence (called smp_read_barrier_depends() and defined as
nothing at all on non-Alpha builds) after every READ_ONCE() and atomic
load. The effect of the fence is to cause the CPU not to execute any
po-later instructions until after the local cache has finished
processing all the stores it has already received. Thus, if the code
was changed to:
adds this fence after every READ_ONCE() and atomic load on Alpha. The
effect of the fence is to cause the CPU not to execute any po-later
instructions until after the local cache has finished processing all
the stores it has already received. Thus, if the code was changed to:
P1()
{
@ -1146,14 +1144,14 @@ READ_ONCE() or another synchronization primitive rather than accessed
directly.
The LKMM requires that smp_rmb(), acquire fences, and strong fences
share this property with smp_read_barrier_depends(): They do not allow
the CPU to execute any po-later instructions (or po-later loads in the
case of smp_rmb()) until all outstanding stores have been processed by
the local cache. In the case of a strong fence, the CPU first has to
wait for all of its po-earlier stores to propagate to every other CPU
in the system; then it has to wait for the local cache to process all
the stores received as of that time -- not just the stores received
when the strong fence began.
share this property: They do not allow the CPU to execute any po-later
instructions (or po-later loads in the case of smp_rmb()) until all
outstanding stores have been processed by the local cache. In the
case of a strong fence, the CPU first has to wait for all of its
po-earlier stores to propagate to every other CPU in the system; then
it has to wait for the local cache to process all the stores received
as of that time -- not just the stores received when the strong fence
began.
And of course, none of this matters for any architecture other than
Alpha.