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Merge branch 'for-joerg/arm-smmu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into iommu/fixes

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This commit is contained in:
Joerg Roedel 2014-09-03 17:58:50 +02:00
commit 61bf5ff07a
340 changed files with 2782 additions and 1789 deletions
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107
Documentation/devicetree/bindings/mfd/tc3589x.txt Normal file
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@ -0,0 +1,107 @@
* Toshiba TC3589x multi-purpose expander
The Toshiba TC3589x series are I2C-based MFD devices which may expose the
following built-in devices: gpio, keypad, rotator (vibrator), PWM (for
e.g. LEDs or vibrators) The included models are:
- TC35890
- TC35892
- TC35893
- TC35894
- TC35895
- TC35896
Required properties:
- compatible : must be "toshiba,tc35890", "toshiba,tc35892", "toshiba,tc35893",
"toshiba,tc35894", "toshiba,tc35895" or "toshiba,tc35896"
- reg : I2C address of the device
- interrupt-parent : specifies which IRQ controller we're connected to
- interrupts : the interrupt on the parent the controller is connected to
- interrupt-controller : marks the device node as an interrupt controller
- #interrupt-cells : should be <1>, the first cell is the IRQ offset on this
TC3589x interrupt controller.
Optional nodes:
- GPIO
This GPIO module inside the TC3589x has 24 (TC35890, TC35892) or 20
(other models) GPIO lines.
- compatible : must be "toshiba,tc3589x-gpio"
- interrupts : interrupt on the parent, which must be the tc3589x MFD device
- interrupt-controller : marks the device node as an interrupt controller
- #interrupt-cells : should be <2>, the first cell is the IRQ offset on this
TC3589x GPIO interrupt controller, the second cell is the interrupt flags
in accordance with <dt-bindings/interrupt-controller/irq.h>. The following
flags are valid:
- IRQ_TYPE_LEVEL_LOW
- IRQ_TYPE_LEVEL_HIGH
- IRQ_TYPE_EDGE_RISING
- IRQ_TYPE_EDGE_FALLING
- IRQ_TYPE_EDGE_BOTH
- gpio-controller : marks the device node as a GPIO controller
- #gpio-cells : should be <2>, the first cell is the GPIO offset on this
GPIO controller, the second cell is the flags.
- Keypad
This keypad is the same on all variants, supporting up to 96 different
keys. The linux-specific properties are modeled on those already existing
in other input drivers.
- compatible : must be "toshiba,tc3589x-keypad"
- debounce-delay-ms : debounce interval in milliseconds
- keypad,num-rows : number of rows in the matrix, see
bindings/input/matrix-keymap.txt
- keypad,num-columns : number of columns in the matrix, see
bindings/input/matrix-keymap.txt
- linux,keymap: the definition can be found in
bindings/input/matrix-keymap.txt
- linux,no-autorepeat: do no enable autorepeat feature.
- linux,wakeup: use any event on keypad as wakeup event.
Example:
tc35893@44 {
compatible = "toshiba,tc35893";
reg = <0x44>;
interrupt-parent = <&gpio6>;
interrupts = <26 IRQ_TYPE_EDGE_RISING>;
interrupt-controller;
#interrupt-cells = <1>;
tc3589x_gpio {
compatible = "toshiba,tc3589x-gpio";
interrupts = <0>;
interrupt-controller;
#interrupt-cells = <2>;
gpio-controller;
#gpio-cells = <2>;
};
tc3589x_keypad {
compatible = "toshiba,tc3589x-keypad";
interrupts = <6>;
debounce-delay-ms = <4>;
keypad,num-columns = <8>;
keypad,num-rows = <8>;
linux,no-autorepeat;
linux,wakeup;
linux,keymap = <0x0301006b
0x04010066
0x06040072
0x040200d7
0x0303006a
0x0205000e
0x0607008b
0x0500001c
0x0403000b
0x03040034
0x05020067
0x0305006c
0x040500e7
0x0005009e
0x06020073
0x01030039
0x07060069
0x050500d9>;
};
};

2
Documentation/devicetree/bindings/mtd/gpmc-nand.txt
View File

@ -22,7 +22,7 @@ Optional properties:
width of 8 is assumed.
- ti,nand-ecc-opt: A string setting the ECC layout to use. One of:
"sw" <deprecated> use "ham1" instead
"sw" 1-bit Hamming ecc code via software
"hw" <deprecated> use "ham1" instead
"hw-romcode" <deprecated> use "ham1" instead
"ham1" 1-bit Hamming ecc code

2
Documentation/devicetree/bindings/pinctrl/qcom,apq8064-pinctrl.txt
View File

@ -62,7 +62,7 @@ Example:
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
interrupts = <0 32 0x4>;
interrupts = <0 16 0x4>;
pinctrl-names = "default";
pinctrl-0 = <&gsbi5_uart_default>;

14
Documentation/dma-buf-sharing.txt
View File

@ -56,10 +56,10 @@ The dma_buf buffer sharing API usage contains the following steps:
size_t size, int flags,
const char *exp_name)
If this succeeds, dma_buf_export allocates a dma_buf structure, and returns a
pointer to the same. It also associates an anonymous file with this buffer,
so it can be exported. On failure to allocate the dma_buf object, it returns
NULL.
If this succeeds, dma_buf_export_named allocates a dma_buf structure, and
returns a pointer to the same. It also associates an anonymous file with this
buffer, so it can be exported. On failure to allocate the dma_buf object,
it returns NULL.
'exp_name' is the name of exporter - to facilitate information while
debugging.
@ -76,7 +76,7 @@ The dma_buf buffer sharing API usage contains the following steps:
drivers and/or processes.
Interface:
int dma_buf_fd(struct dma_buf *dmabuf)
int dma_buf_fd(struct dma_buf *dmabuf, int flags)
This API installs an fd for the anonymous file associated with this buffer;
returns either 'fd', or error.
@ -157,7 +157,9 @@ to request use of buffer for allocation.
"dma_buf->ops->" indirection from the users of this interface.
In struct dma_buf_ops, unmap_dma_buf is defined as
void (*unmap_dma_buf)(struct dma_buf_attachment *, struct sg_table *);
void (*unmap_dma_buf)(struct dma_buf_attachment *,
struct sg_table *,
enum dma_data_direction);
unmap_dma_buf signifies the end-of-DMA for the attachment provided. Like
map_dma_buf, this API also must be implemented by the exporter.

36
Documentation/kdump/kdump.txt
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@ -18,7 +18,7 @@ memory image to a dump file on the local disk, or across the network to
a remote system.
Kdump and kexec are currently supported on the x86, x86_64, ppc64, ia64,
and s390x architectures.
s390x and arm architectures.
When the system kernel boots, it reserves a small section of memory for
the dump-capture kernel. This ensures that ongoing Direct Memory Access
@ -112,7 +112,7 @@ There are two possible methods of using Kdump.
2) Or use the system kernel binary itself as dump-capture kernel and there is
no need to build a separate dump-capture kernel. This is possible
only with the architectures which support a relocatable kernel. As
of today, i386, x86_64, ppc64 and ia64 architectures support relocatable
of today, i386, x86_64, ppc64, ia64 and arm architectures support relocatable
kernel.
Building a relocatable kernel is advantageous from the point of view that
@ -241,6 +241,13 @@ Dump-capture kernel config options (Arch Dependent, ia64)
kernel will be aligned to 64Mb, so if the start address is not then
any space below the alignment point will be wasted.
Dump-capture kernel config options (Arch Dependent, arm)
----------------------------------------------------------
- To use a relocatable kernel,
Enable "AUTO_ZRELADDR" support under "Boot" options:
AUTO_ZRELADDR=y
Extended crashkernel syntax
===========================
@ -256,6 +263,10 @@ The syntax is:
crashkernel=<range1>:<size1>[,<range2>:<size2>,...][@offset]
range=start-[end]
Please note, on arm, the offset is required.
crashkernel=<range1>:<size1>[,<range2>:<size2>,...]@offset
range=start-[end]
'start' is inclusive and 'end' is exclusive.
For example:
@ -296,6 +307,12 @@ Boot into System Kernel
on the memory consumption of the kdump system. In general this is not
dependent on the memory size of the production system.
On arm, use "crashkernel=Y@X". Note that the start address of the kernel
will be aligned to 128MiB (0x08000000), so if the start address is not then
any space below the alignment point may be overwritten by the dump-capture kernel,
which means it is possible that the vmcore is not that precise as expected.
Load the Dump-capture Kernel
============================
@ -315,7 +332,8 @@ For ia64:
- Use vmlinux or vmlinuz.gz
For s390x:
- Use image or bzImage
For arm:
- Use zImage
If you are using a uncompressed vmlinux image then use following command
to load dump-capture kernel.
@ -331,6 +349,15 @@ to load dump-capture kernel.
--initrd=<initrd-for-dump-capture-kernel> \
--append="root=<root-dev> <arch-specific-options>"
If you are using a compressed zImage, then use following command
to load dump-capture kernel.
kexec --type zImage -p <dump-capture-kernel-bzImage> \
--initrd=<initrd-for-dump-capture-kernel> \
--dtb=<dtb-for-dump-capture-kernel> \
--append="root=<root-dev> <arch-specific-options>"
Please note, that --args-linux does not need to be specified for ia64.
It is planned to make this a no-op on that architecture, but for now
it should be omitted
@ -347,6 +374,9 @@ For ppc64:
For s390x:
"1 maxcpus=1 cgroup_disable=memory"
For arm:
"1 maxcpus=1 reset_devices"
Notes on loading the dump-capture kernel:
* By default, the ELF headers are stored in ELF64 format to support

209
Documentation/this_cpu_ops.txt
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@ -2,26 +2,26 @@ this_cpu operations
-------------------
this_cpu operations are a way of optimizing access to per cpu
variables associated with the *currently* executing processor through
the use of segment registers (or a dedicated register where the cpu
permanently stored the beginning of the per cpu area for a specific
processor).
variables associated with the *currently* executing processor. This is
done through the use of segment registers (or a dedicated register where
the cpu permanently stored the beginning of the per cpu area for a
specific processor).
The this_cpu operations add a per cpu variable offset to the processor
specific percpu base and encode that operation in the instruction
this_cpu operations add a per cpu variable offset to the processor
specific per cpu base and encode that operation in the instruction
operating on the per cpu variable.
This means there are no atomicity issues between the calculation of
This means that there are no atomicity issues between the calculation of
the offset and the operation on the data. Therefore it is not
necessary to disable preempt or interrupts to ensure that the
necessary to disable preemption or interrupts to ensure that the
processor is not changed between the calculation of the address and
the operation on the data.
Read-modify-write operations are of particular interest. Frequently
processors have special lower latency instructions that can operate
without the typical synchronization overhead but still provide some
sort of relaxed atomicity guarantee. The x86 for example can execute
RMV (Read Modify Write) instructions like inc/dec/cmpxchg without the
without the typical synchronization overhead, but still provide some
sort of relaxed atomicity guarantees. The x86, for example, can execute
RMW (Read Modify Write) instructions like inc/dec/cmpxchg without the
lock prefix and the associated latency penalty.
Access to the variable without the lock prefix is not synchronized but
@ -30,6 +30,38 @@ data specific to the currently executing processor. Only the current
processor should be accessing that variable and therefore there are no
concurrency issues with other processors in the system.
Please note that accesses by remote processors to a per cpu area are
exceptional situations and may impact performance and/or correctness
(remote write operations) of local RMW operations via this_cpu_*.
The main use of the this_cpu operations has been to optimize counter
operations.
The following this_cpu() operations with implied preemption protection
are defined. These operations can be used without worrying about
preemption and interrupts.
this_cpu_add()
this_cpu_read(pcp)
this_cpu_write(pcp, val)
this_cpu_add(pcp, val)
this_cpu_and(pcp, val)
this_cpu_or(pcp, val)
this_cpu_add_return(pcp, val)
this_cpu_xchg(pcp, nval)
this_cpu_cmpxchg(pcp, oval, nval)
this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
this_cpu_sub(pcp, val)
this_cpu_inc(pcp)
this_cpu_dec(pcp)
this_cpu_sub_return(pcp, val)
this_cpu_inc_return(pcp)
this_cpu_dec_return(pcp)
Inner working of this_cpu operations
------------------------------------
On x86 the fs: or the gs: segment registers contain the base of the
per cpu area. It is then possible to simply use the segment override
to relocate a per cpu relative address to the proper per cpu area for
@ -48,22 +80,21 @@ results in a single instruction
mov ax, gs:[x]
instead of a sequence of calculation of the address and then a fetch
from that address which occurs with the percpu operations. Before
from that address which occurs with the per cpu operations. Before
this_cpu_ops such sequence also required preempt disable/enable to
prevent the kernel from moving the thread to a different processor
while the calculation is performed.
The main use of the this_cpu operations has been to optimize counter
operations.
Consider the following this_cpu operation:
this_cpu_inc(x)
results in the following single instruction (no lock prefix!)
The above results in the following single instruction (no lock prefix!)
inc gs:[x]
instead of the following operations required if there is no segment
register.
register:
int *y;
int cpu;
@ -73,10 +104,10 @@ register.
(*y)++;
put_cpu();
Note that these operations can only be used on percpu data that is
Note that these operations can only be used on per cpu data that is
reserved for a specific processor. Without disabling preemption in the
surrounding code this_cpu_inc() will only guarantee that one of the
percpu counters is correctly incremented. However, there is no
per cpu counters is correctly incremented. However, there is no
guarantee that the OS will not move the process directly before or
after the this_cpu instruction is executed. In general this means that
the value of the individual counters for each processor are
@ -86,9 +117,9 @@ that is of interest.
Per cpu variables are used for performance reasons. Bouncing cache
lines can be avoided if multiple processors concurrently go through
the same code paths. Since each processor has its own per cpu
variables no concurrent cacheline updates take place. The price that
variables no concurrent cache line updates take place. The price that
has to be paid for this optimization is the need to add up the per cpu
counters when the value of the counter is needed.
counters when the value of a counter is needed.
Special operations:
@ -100,33 +131,39 @@ Takes the offset of a per cpu variable (&x !) and returns the address
of the per cpu variable that belongs to the currently executing
processor. this_cpu_ptr avoids multiple steps that the common
get_cpu/put_cpu sequence requires. No processor number is
available. Instead the offset of the local per cpu area is simply
added to the percpu offset.
available. Instead, the offset of the local per cpu area is simply
added to the per cpu offset.
Note that this operation is usually used in a code segment when
preemption has been disabled. The pointer is then used to
access local per cpu data in a critical section. When preemption
is re-enabled this pointer is usually no longer useful since it may
no longer point to per cpu data of the current processor.
Per cpu variables and offsets
-----------------------------
Per cpu variables have *offsets* to the beginning of the percpu
Per cpu variables have *offsets* to the beginning of the per cpu
area. They do not have addresses although they look like that in the
code. Offsets cannot be directly dereferenced. The offset must be
added to a base pointer of a percpu area of a processor in order to
added to a base pointer of a per cpu area of a processor in order to
form a valid address.
Therefore the use of x or &x outside of the context of per cpu
operations is invalid and will generally be treated like a NULL
pointer dereference.
In the context of per cpu operations
DEFINE_PER_CPU(int, x);
x is a per cpu variable. Most this_cpu operations take a cpu
variable.
In the context of per cpu operations the above implies that x is a per
cpu variable. Most this_cpu operations take a cpu variable.
&x is the *offset* a per cpu variable. this_cpu_ptr() takes
the offset of a per cpu variable which makes this look a bit
strange.
int __percpu *p = &x;
&x and hence p is the *offset* of a per cpu variable. this_cpu_ptr()
takes the offset of a per cpu variable which makes this look a bit
strange.
Operations on a field of a per cpu structure
@ -152,7 +189,7 @@ If we have an offset to struct s:
struct s __percpu *ps = &p;
z = this_cpu_dec(ps->m);
this_cpu_dec(ps->m);
z = this_cpu_inc_return(ps->n);
@ -172,29 +209,52 @@ if we do not make use of this_cpu ops later to manipulate fields:
Variants of this_cpu ops
-------------------------
this_cpu ops are interrupt safe. Some architecture do not support
this_cpu ops are interrupt safe. Some architectures do not support
these per cpu local operations. In that case the operation must be
replaced by code that disables interrupts, then does the operations
that are guaranteed to be atomic and then reenable interrupts. Doing
that are guaranteed to be atomic and then re-enable interrupts. Doing
so is expensive. If there are other reasons why the scheduler cannot
change the processor we are executing on then there is no reason to
disable interrupts. For that purpose the __this_cpu operations are
provided. For example.
disable interrupts. For that purpose the following __this_cpu operations
are provided.
__this_cpu_inc(x);
These operations have no guarantee against concurrent interrupts or
preemption. If a per cpu variable is not used in an interrupt context
and the scheduler cannot preempt, then they are safe. If any interrupts
still occur while an operation is in progress and if the interrupt too
modifies the variable, then RMW actions can not be guaranteed to be
safe.
Will increment x and will not fallback to code that disables
__this_cpu_add()
__this_cpu_read(pcp)
__this_cpu_write(pcp, val)
__this_cpu_add(pcp, val)
__this_cpu_and(pcp, val)
__this_cpu_or(pcp, val)
__this_cpu_add_return(pcp, val)
__this_cpu_xchg(pcp, nval)
__this_cpu_cmpxchg(pcp, oval, nval)
__this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
__this_cpu_sub(pcp, val)
__this_cpu_inc(pcp)
__this_cpu_dec(pcp)
__this_cpu_sub_return(pcp, val)
__this_cpu_inc_return(pcp)
__this_cpu_dec_return(pcp)
Will increment x and will not fall-back to code that disables
interrupts on platforms that cannot accomplish atomicity through
address relocation and a Read-Modify-Write operation in the same
instruction.
&this_cpu_ptr(pp)->n vs this_cpu_ptr(&pp->n)
--------------------------------------------
The first operation takes the offset and forms an address and then
adds the offset of the n field.
adds the offset of the n field. This may result in two add
instructions emitted by the compiler.
The second one first adds the two offsets and then does the
relocation. IMHO the second form looks cleaner and has an easier time
@ -202,4 +262,73 @@ with (). The second form also is consistent with the way
this_cpu_read() and friends are used.
Christoph Lameter, April 3rd, 2013
Remote access to per cpu data
------------------------------
Per cpu data structures are designed to be used by one cpu exclusively.
If you use the variables as intended, this_cpu_ops() are guaranteed to
be "atomic" as no other CPU has access to these data structures.
There are special cases where you might need to access per cpu data
structures remotely. It is usually safe to do a remote read access
and that is frequently done to summarize counters. Remote write access
something which could be problematic because this_cpu ops do not
have lock semantics. A remote write may interfere with a this_cpu
RMW operation.
Remote write accesses to percpu data structures are highly discouraged
unless absolutely necessary. Please consider using an IPI to wake up
the remote CPU and perform the update to its per cpu area.
To access per-cpu data structure remotely, typically the per_cpu_ptr()
function is used:
DEFINE_PER_CPU(struct data, datap);
struct data *p = per_cpu_ptr(&datap, cpu);
This makes it explicit that we are getting ready to access a percpu
area remotely.
You can also do the following to convert the datap offset to an address
struct data *p = this_cpu_ptr(&datap);
but, passing of pointers calculated via this_cpu_ptr to other cpus is
unusual and should be avoided.
Remote access are typically only for reading the status of another cpus
per cpu data. Write accesses can cause unique problems due to the
relaxed synchronization requirements for this_cpu operations.
One example that illustrates some concerns with write operations is
the following scenario that occurs because two per cpu variables
share a cache-line but the relaxed synchronization is applied to
only one process updating the cache-line.
Consider the following example
struct test {
atomic_t a;
int b;
};
DEFINE_PER_CPU(struct test, onecacheline);
There is some concern about what would happen if the field 'a' is updated
remotely from one processor and the local processor would use this_cpu ops
to update field b. Care should be taken that such simultaneous accesses to
data within the same cache line are avoided. Also costly synchronization
may be necessary. IPIs are generally recommended in such scenarios instead
of a remote write to the per cpu area of another processor.
Even in cases where the remote writes are rare, please bear in
mind that a remote write will evict the cache line from the processor
that most likely will access it. If the processor wakes up and finds a
missing local cache line of a per cpu area, its performance and hence
the wake up times will be affected.
Christoph Lameter, August 4th, 2014
Pranith Kumar, Aug 2nd, 2014

13
MAINTAINERS
View File

@ -1279,8 +1279,13 @@ M: Heiko Stuebner <heiko@sntech.de>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
L: linux-rockchip@lists.infradead.org
S: Maintained
F: arch/arm/boot/dts/rk3*
F: arch/arm/mach-rockchip/
F: drivers/clk/rockchip/
F: drivers/i2c/busses/i2c-rk3x.c
F: drivers/*/*rockchip*
F: drivers/*/*/*rockchip*
F: sound/soc/rockchip/
ARM/SAMSUNG ARM ARCHITECTURES
M: Ben Dooks <ben-linux@fluff.org>
@ -9557,6 +9562,14 @@ S: Maintained
F: Documentation/usb/ohci.txt
F: drivers/usb/host/ohci*
USB OVER IP DRIVER
M: Valentina Manea <valentina.manea.m@gmail.com>
M: Shuah Khan <shuah.kh@samsung.com>
L: linux-usb@vger.kernel.org
S: Maintained
F: drivers/usb/usbip/
F: tools/usb/usbip/
USB PEGASUS DRIVER
M: Petko Manolov <petkan@nucleusys.com>
L: linux-usb@vger.kernel.org

2
Makefile
View File

@ -1,7 +1,7 @@
VERSION = 3
PATCHLEVEL = 17
SUBLEVEL = 0
EXTRAVERSION = -rc2
EXTRAVERSION = -rc3
NAME = Shuffling Zombie Juror
# *DOCUMENTATION*

12
arch/alpha/include/asm/io.h
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@ -500,10 +500,14 @@ extern inline void writeq(u64 b, volatile void __iomem *addr)
#define outb_p outb
#define outw_p outw
#define outl_p outl
#define readb_relaxed(addr) __raw_readb(addr)
#define readw_relaxed(addr) __raw_readw(addr)
#define readl_relaxed(addr) __raw_readl(addr)
#define readq_relaxed(addr) __raw_readq(addr)
#define readb_relaxed(addr) __raw_readb(addr)
#define readw_relaxed(addr) __raw_readw(addr)
#define readl_relaxed(addr) __raw_readl(addr)
#define readq_relaxed(addr) __raw_readq(addr)
#define writeb_relaxed(b, addr) __raw_writeb(b, addr)
#define writew_relaxed(b, addr) __raw_writew(b, addr)
#define writel_relaxed(b, addr) __raw_writel(b, addr)
#define writeq_relaxed(b, addr) __raw_writeq(b, addr)
#define mmiowb()

2
arch/alpha/include/asm/unistd.h
View File

@ -3,7 +3,7 @@
#include <uapi/asm/unistd.h>
#define NR_SYSCALLS 508
#define NR_SYSCALLS 511
#define __ARCH_WANT_OLD_READDIR
#define __ARCH_WANT_STAT64

3
arch/alpha/include/uapi/asm/unistd.h
View File

@ -469,5 +469,8 @@
#define __NR_process_vm_writev 505
#define __NR_kcmp 506
#define __NR_finit_module 507
#define __NR_sched_setattr 508
#define __NR_sched_getattr 509
#define __NR_renameat2 510
#endif /* _UAPI_ALPHA_UNISTD_H */

3
arch/alpha/kernel/systbls.S
View File

@ -526,6 +526,9 @@ sys_call_table:
.quad sys_process_vm_writev /* 505 */
.quad sys_kcmp
.quad sys_finit_module
.quad sys_sched_setattr
.quad sys_sched_getattr
.quad sys_renameat2 /* 510 */
.size sys_call_table, . - sys_call_table
.type sys_call_table, @object

1
arch/arc/mm/cache_arc700.c
View File

@ -581,6 +581,7 @@ void flush_icache_range(unsigned long kstart, unsigned long kend)
tot_sz -= sz;
}
}
EXPORT_SYMBOL(flush_icache_range);
/*
* General purpose helper to make I and D cache lines consistent.

2
arch/arm/Kconfig
View File

@ -1983,8 +1983,6 @@ config XIP_PHYS_ADDR
config KEXEC
bool "Kexec system call (EXPERIMENTAL)"
depends on (!SMP || PM_SLEEP_SMP)
select CRYPTO
select CRYPTO_SHA256
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot

16
arch/arm/boot/dts/dra7.dtsi
View File

@ -245,7 +245,7 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
#interrupt-cells = <2>;
};
gpio2: gpio@48055000 {
@ -256,7 +256,7 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
#interrupt-cells = <2>;
};
gpio3: gpio@48057000 {
@ -267,7 +267,7 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
#interrupt-cells = <2>;
};
gpio4: gpio@48059000 {
@ -278,7 +278,7 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
#interrupt-cells = <2>;
};
gpio5: gpio@4805b000 {
@ -289,7 +289,7 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
#interrupt-cells = <2>;
};
gpio6: gpio@4805d000 {
@ -300,7 +300,7 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
#interrupt-cells = <2>;
};
gpio7: gpio@48051000 {
@ -311,7 +311,7 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
#interrupt-cells = <2>;
};
gpio8: gpio@48053000 {
@ -322,7 +322,7 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
#interrupt-cells = <2>;
};
uart1: serial@4806a000 {

8
arch/arm/boot/dts/imx53-qsrb.dts
View File

@ -28,6 +28,12 @@
MX53_PAD_CSI0_DAT9__I2C1_SCL 0x400001ec
>;
};
pinctrl_pmic: pmicgrp {
fsl,pins = <
MX53_PAD_CSI0_DAT5__GPIO5_23 0x1e4 /* IRQ */
>;
};
};
};
@ -38,6 +44,8 @@
pmic: mc34708@8 {
compatible = "fsl,mc34708";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pmic>;
reg = <0x08>;
interrupt-parent = <&gpio5>;
interrupts = <23 0x8>;

4
arch/arm/boot/dts/imx6dl-hummingboard.dts
View File

@ -58,7 +58,7 @@
sound-spdif {
compatible = "fsl,imx-audio-spdif";
model = "imx-spdif";
model = "On-board SPDIF";
/* IMX6 doesn't implement this yet */
spdif-controller = <&spdif>;
spdif-out;
@ -181,11 +181,13 @@
};
&usbh1 {
disable-over-current;
vbus-supply = <&reg_usbh1_vbus>;
status = "okay";
};
&usbotg {
disable-over-current;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hummingboard_usbotg_id>;
vbus-supply = <&reg_usbotg_vbus>;

19
arch/arm/boot/dts/imx6qdl-cubox-i.dtsi
View File

@ -61,7 +61,7 @@
sound-spdif {
compatible = "fsl,imx-audio-spdif";
model = "imx-spdif";
model = "Integrated SPDIF";
/* IMX6 doesn't implement this yet */
spdif-controller = <&spdif>;
spdif-out;
@ -130,16 +130,23 @@
fsl,pins = <MX6QDL_PAD_GPIO_17__SPDIF_OUT 0x13091>;
};
pinctrl_cubox_i_usbh1: cubox-i-usbh1 {
fsl,pins = <MX6QDL_PAD_GPIO_3__USB_H1_OC 0x1b0b0>;
};
pinctrl_cubox_i_usbh1_vbus: cubox-i-usbh1-vbus {
fsl,pins = <MX6QDL_PAD_GPIO_0__GPIO1_IO00 0x4001b0b0>;
};
pinctrl_cubox_i_usbotg_id: cubox-i-usbotg-id {
pinctrl_cubox_i_usbotg: cubox-i-usbotg {
/*
* The Cubox-i pulls this low, but as it's pointless
* The Cubox-i pulls ID low, but as it's pointless
* leaving it as a pull-up, even if it is just 10uA.
*/
fsl,pins = <MX6QDL_PAD_GPIO_1__USB_OTG_ID 0x13059>;
fsl,pins = <
MX6QDL_PAD_GPIO_1__USB_OTG_ID 0x13059
MX6QDL_PAD_KEY_COL4__USB_OTG_OC 0x1b0b0
>;
};
pinctrl_cubox_i_usbotg_vbus: cubox-i-usbotg-vbus {
@ -173,13 +180,15 @@
};
&usbh1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_cubox_i_usbh1>;
vbus-supply = <&reg_usbh1_vbus>;
status = "okay";
};
&usbotg {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_cubox_i_usbotg_id>;
pinctrl-0 = <&pinctrl_cubox_i_usbotg>;
vbus-supply = <&reg_usbotg_vbus>;
status = "okay";
};

2
arch/arm/boot/dts/imx6qdl-microsom-ar8035.dtsi
View File

@ -17,7 +17,7 @@
enet {
pinctrl_microsom_enet_ar8035: microsom-enet-ar8035 {
fsl,pins = <
MX6QDL_PAD_ENET_MDIO__ENET_MDIO 0x1b0b0
MX6QDL_PAD_ENET_MDIO__ENET_MDIO 0x1b8b0
MX6QDL_PAD_ENET_MDC__ENET_MDC 0x1b0b0
/* AR8035 reset */
MX6QDL_PAD_KEY_ROW4__GPIO4_IO15 0x130b0

1
arch/arm/boot/dts/omap3-beagle.dts
View File

@ -292,6 +292,7 @@
&uart3 {
pinctrl-names = "default";
pinctrl-0 = <&uart3_pins>;
interrupts-extended = <&intc 74 &omap3_pmx_core OMAP3_UART3_RX>;
};
&gpio1 {

2
arch/arm/boot/dts/omap3-n900.dts
View File

@ -353,7 +353,7 @@
};
twl_power: power {
compatible = "ti,twl4030-power-n900";
compatible = "ti,twl4030-power-n900", "ti,twl4030-power-idle-osc-off";
ti,use_poweroff;
};
};

2
arch/arm/boot/dts/omap3430-sdp.dts
View File

@ -107,7 +107,7 @@
#address-cells = <1>;
#size-cells = <1>;
reg = <1 0 0x08000000>;
ti,nand-ecc-opt = "ham1";
ti,nand-ecc-opt = "sw";
nand-bus-width = <8>;
gpmc,cs-on-ns = <0>;
gpmc,cs-rd-off-ns = <36>;

16
arch/arm/boot/dts/omap54xx-clocks.dtsi
View File

@ -367,10 +367,12 @@
l3_iclk_div: l3_iclk_div {
#clock-cells = <0>;
compatible = "fixed-factor-clock";
compatible = "ti,divider-clock";
ti,max-div = <2>;
ti,bit-shift = <4>;
reg = <0x100>;
clocks = <&dpll_core_h12x2_ck>;
clock-mult = <1>;
clock-div = <1>;
ti,index-power-of-two;
};
gpu_l3_iclk: gpu_l3_iclk {
@ -383,10 +385,12 @@
l4_root_clk_div: l4_root_clk_div {
#clock-cells = <0>;
compatible = "fixed-factor-clock";
compatible = "ti,divider-clock";
ti,max-div = <2>;
ti,bit-shift = <8>;
reg = <0x100>;
clocks = <&l3_iclk_div>;
clock-mult = <1>;
clock-div = <1>;
ti,index-power-of-two;
};
slimbus1_slimbus_clk: slimbus1_slimbus_clk {

4
arch/arm/boot/dts/twl6030.dtsi
View File

@ -83,10 +83,6 @@
regulator-always-on;
};
clk32kg: regulator-clk32kg {
compatible = "ti,twl6030-clk32kg";
};
twl_usb_comparator: usb-comparator {
compatible = "ti,twl6030-usb";
interrupts = <4>, <10>;

1
arch/arm/include/asm/cacheflush.h
View File

@ -472,7 +472,6 @@ static inline void __sync_cache_range_r(volatile void *p, size_t size)
"mcr p15, 0, r0, c1, c0, 0 @ set SCTLR \n\t" \
"isb \n\t" \
"bl v7_flush_dcache_"__stringify(level)" \n\t" \
"clrex \n\t" \
"mrc p15, 0, r0, c1, c0, 1 @ get ACTLR \n\t" \
"bic r0, r0, #(1 << 6) @ disable local coherency \n\t" \
"mcr p15, 0, r0, c1, c0, 1 @ set ACTLR \n\t" \

3
arch/arm/include/asm/cputype.h
View File

@ -74,6 +74,7 @@
#define ARM_CPU_PART_CORTEX_A12 0x4100c0d0
#define ARM_CPU_PART_CORTEX_A17 0x4100c0e0
#define ARM_CPU_PART_CORTEX_A15 0x4100c0f0
#define ARM_CPU_PART_MASK 0xff00fff0
#define ARM_CPU_XSCALE_ARCH_MASK 0xe000
#define ARM_CPU_XSCALE_ARCH_V1 0x2000
@ -179,7 +180,7 @@ static inline unsigned int __attribute_const__ read_cpuid_implementor(void)
*/
static inline unsigned int __attribute_const__ read_cpuid_part(void)
{
return read_cpuid_id() & 0xff00fff0;
return read_cpuid_id() & ARM_CPU_PART_MASK;
}
static inline unsigned int __attribute_const__ __deprecated read_cpuid_part_number(void)

1
arch/arm/include/asm/elf.h
View File

@ -50,6 +50,7 @@ typedef struct user_fp elf_fpregset_t;
#define R_ARM_ABS32 2
#define R_ARM_CALL 28
#define R_ARM_JUMP24 29
#define R_ARM_TARGET1 38
#define R_ARM_V4BX 40
#define R_ARM_PREL31 42
#define R_ARM_MOVW_ABS_NC 43

15
arch/arm/include/asm/smp_plat.h
View File

@ -8,6 +8,7 @@
#include <linux/cpumask.h>
#include <linux/err.h>
#include <asm/cpu.h>
#include <asm/cputype.h>
/*
@ -25,6 +26,20 @@ static inline bool is_smp(void)
#endif
}
/**
* smp_cpuid_part() - return part id for a given cpu
* @cpu: logical cpu id.
*
* Return: part id of logical cpu passed as argument.
*/
static inline unsigned int smp_cpuid_part(int cpu)
{
struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpu);
return is_smp() ? cpu_info->cpuid & ARM_CPU_PART_MASK :
read_cpuid_part();
}
/* all SMP configurations have the extended CPUID registers */
#ifndef CONFIG_MMU
#define tlb_ops_need_broadcast() 0

29
arch/arm/kernel/entry-header.S
View File

@ -208,26 +208,21 @@
#endif
.endif
msr spsr_cxsf, \rpsr
#if defined(CONFIG_CPU_V6)
ldr r0, [sp]
strex r1, r2, [sp] @ clear the exclusive monitor
ldmib sp, {r1 - pc}^ @ load r1 - pc, cpsr
#elif defined(CONFIG_CPU_32v6K)
clrex @ clear the exclusive monitor
ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr
#else
ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr
#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_32v6K)
@ We must avoid clrex due to Cortex-A15 erratum #830321
sub r0, sp, #4 @ uninhabited address
strex r1, r2, [r0] @ clear the exclusive monitor
#endif
ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr
.endm
.macro restore_user_regs, fast = 0, offset = 0
ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr
ldr lr, [sp, #\offset + S_PC]! @ get pc
msr spsr_cxsf, r1 @ save in spsr_svc
#if defined(CONFIG_CPU_V6)
#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_32v6K)
@ We must avoid clrex due to Cortex-A15 erratum #830321
strex r1, r2, [sp] @ clear the exclusive monitor
#elif defined(CONFIG_CPU_32v6K)
clrex @ clear the exclusive monitor
#endif
.if \fast
ldmdb sp, {r1 - lr}^ @ get calling r1 - lr
@ -261,7 +256,10 @@
.endif
ldr lr, [sp, #S_SP] @ top of the stack
ldrd r0, r1, [sp, #S_LR] @ calling lr and pc
clrex @ clear the exclusive monitor
@ We must avoid clrex due to Cortex-A15 erratum #830321
strex r2, r1, [sp, #S_LR] @ clear the exclusive monitor
stmdb lr!, {r0, r1, \rpsr} @ calling lr and rfe context
ldmia sp, {r0 - r12}
mov sp, lr
@ -282,13 +280,16 @@
.endm
#else /* ifdef CONFIG_CPU_V7M */
.macro restore_user_regs, fast = 0, offset = 0
clrex @ clear the exclusive monitor
mov r2, sp
load_user_sp_lr r2, r3, \offset + S_SP @ calling sp, lr
ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr
ldr lr, [sp, #\offset + S_PC] @ get pc
add sp, sp, #\offset + S_SP
msr spsr_cxsf, r1 @ save in spsr_svc
@ We must avoid clrex due to Cortex-A15 erratum #830321
strex r1, r2, [sp] @ clear the exclusive monitor
.if \fast
ldmdb sp, {r1 - r12} @ get calling r1 - r12
.else

1
arch/arm/kernel/module.c
View File

@ -91,6 +91,7 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
break;
case R_ARM_ABS32:
case R_ARM_TARGET1:
*(u32 *)loc += sym->st_value;
break;

1
arch/arm/mach-bcm/Makefile
View File

@ -36,5 +36,4 @@ obj-$(CONFIG_ARCH_BCM_5301X) += bcm_5301x.o
ifeq ($(CONFIG_ARCH_BRCMSTB),y)
obj-y += brcmstb.o
obj-$(CONFIG_SMP) += headsmp-brcmstb.o platsmp-brcmstb.o
endif

19
arch/arm/mach-bcm/brcmstb.h
View File

@ -1,19 +0,0 @@
/*
* Copyright (C) 2013-2014 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __BRCMSTB_H__
#define __BRCMSTB_H__
void brcmstb_secondary_startup(void);
#endif /* __BRCMSTB_H__ */

33
arch/arm/mach-bcm/headsmp-brcmstb.S
View File

@ -1,33 +0,0 @@
/*
* SMP boot code for secondary CPUs
* Based on arch/arm/mach-tegra/headsmp.S
*
* Copyright (C) 2010 NVIDIA, Inc.
* Copyright (C) 2013-2014 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <asm/assembler.h>
#include <linux/linkage.h>
#include <linux/init.h>
.section ".text.head", "ax"
ENTRY(brcmstb_secondary_startup)
/*
* Ensure CPU is in a sane state by disabling all IRQs and switching
* into SVC mode.
*/
setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r0
bl v7_invalidate_l1
b secondary_startup
ENDPROC(brcmstb_secondary_startup)

363
arch/arm/mach-bcm/platsmp-brcmstb.c
View File

@ -1,363 +0,0 @@
/*
* Broadcom STB CPU SMP and hotplug support for ARM
*
* Copyright (C) 2013-2014 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/printk.h>
#include <linux/regmap.h>
#include <linux/smp.h>
#include <linux/mfd/syscon.h>
#include <linux/spinlock.h>
#include <asm/cacheflush.h>
#include <asm/cp15.h>
#include <asm/mach-types.h>
#include <asm/smp_plat.h>
#include "brcmstb.h"
enum {
ZONE_MAN_CLKEN_MASK = BIT(0),
ZONE_MAN_RESET_CNTL_MASK = BIT(1),
ZONE_MAN_MEM_PWR_MASK = BIT(4),
ZONE_RESERVED_1_MASK = BIT(5),
ZONE_MAN_ISO_CNTL_MASK = BIT(6),
ZONE_MANUAL_CONTROL_MASK = BIT(7),
ZONE_PWR_DN_REQ_MASK = BIT(9),
ZONE_PWR_UP_REQ_MASK = BIT(10),
ZONE_BLK_RST_ASSERT_MASK = BIT(12),
ZONE_PWR_OFF_STATE_MASK = BIT(25),
ZONE_PWR_ON_STATE_MASK = BIT(26),
ZONE_DPG_PWR_STATE_MASK = BIT(28),
ZONE_MEM_PWR_STATE_MASK = BIT(29),
ZONE_RESET_STATE_MASK = BIT(31),
CPU0_PWR_ZONE_CTRL_REG = 1,
CPU_RESET_CONFIG_REG = 2,
};
static void __iomem *cpubiuctrl_block;
static void __iomem *hif_cont_block;
static u32 cpu0_pwr_zone_ctrl_reg;
static u32 cpu_rst_cfg_reg;
static u32 hif_cont_reg;
#ifdef CONFIG_HOTPLUG_CPU
static DEFINE_PER_CPU_ALIGNED(int, per_cpu_sw_state);
static int per_cpu_sw_state_rd(u32 cpu)
{
sync_cache_r(SHIFT_PERCPU_PTR(&per_cpu_sw_state, per_cpu_offset(cpu)));
return per_cpu(per_cpu_sw_state, cpu);
}
static void per_cpu_sw_state_wr(u32 cpu, int val)
{
per_cpu(per_cpu_sw_state, cpu) = val;
dmb();
sync_cache_w(SHIFT_PERCPU_PTR(&per_cpu_sw_state, per_cpu_offset(cpu)));
dsb_sev();
}
#else
static inline void per_cpu_sw_state_wr(u32 cpu, int val) { }
#endif
static void __iomem *pwr_ctrl_get_base(u32 cpu)
{
void __iomem *base = cpubiuctrl_block + cpu0_pwr_zone_ctrl_reg;
base += (cpu_logical_map(cpu) * 4);
return base;
}
static u32 pwr_ctrl_rd(u32 cpu)
{
void __iomem *base = pwr_ctrl_get_base(cpu);
return readl_relaxed(base);
}
static void pwr_ctrl_wr(u32 cpu, u32 val)
{
void __iomem *base = pwr_ctrl_get_base(cpu);
writel(val, base);
}
static void cpu_rst_cfg_set(u32 cpu, int set)
{
u32 val;
val = readl_relaxed(cpubiuctrl_block + cpu_rst_cfg_reg);
if (set)
val |= BIT(cpu_logical_map(cpu));
else
val &= ~BIT(cpu_logical_map(cpu));
writel_relaxed(val, cpubiuctrl_block + cpu_rst_cfg_reg);
}
static void cpu_set_boot_addr(u32 cpu, unsigned long boot_addr)
{
const int reg_ofs = cpu_logical_map(cpu) * 8;
writel_relaxed(0, hif_cont_block + hif_cont_reg + reg_ofs);
writel_relaxed(boot_addr, hif_cont_block + hif_cont_reg + 4 + reg_ofs);
}
static void brcmstb_cpu_boot(u32 cpu)
{
pr_info("SMP: Booting CPU%d...\n", cpu);
/*
* set the reset vector to point to the secondary_startup
* routine
*/
cpu_set_boot_addr(cpu, virt_to_phys(brcmstb_secondary_startup));
/* unhalt the cpu */
cpu_rst_cfg_set(cpu, 0);
}
static void brcmstb_cpu_power_on(u32 cpu)
{
/*
* The secondary cores power was cut, so we must go through
* power-on initialization.
*/
u32 tmp;
pr_info("SMP: Powering up CPU%d...\n", cpu);
/* Request zone power up */
pwr_ctrl_wr(cpu, ZONE_PWR_UP_REQ_MASK);
/* Wait for the power up FSM to complete */
do {
tmp = pwr_ctrl_rd(cpu);
} while (!(tmp & ZONE_PWR_ON_STATE_MASK));
per_cpu_sw_state_wr(cpu, 1);
}
static int brcmstb_cpu_get_power_state(u32 cpu)
{
int tmp = pwr_ctrl_rd(cpu);
return (tmp & ZONE_RESET_STATE_MASK) ? 0 : 1;
}
#ifdef CONFIG_HOTPLUG_CPU
static void brcmstb_cpu_die(u32 cpu)
{
v7_exit_coherency_flush(all);
/* Prevent all interrupts from reaching this CPU. */
arch_local_irq_disable();
/*
* Final full barrier to ensure everything before this instruction has
* quiesced.
*/
isb();
dsb();
per_cpu_sw_state_wr(cpu, 0);
/* Sit and wait to die */
wfi();
/* We should never get here... */
panic("Spurious interrupt on CPU %d received!\n", cpu);
}
static int brcmstb_cpu_kill(u32 cpu)
{
u32 tmp;
pr_info("SMP: Powering down CPU%d...\n", cpu);
while (per_cpu_sw_state_rd(cpu))
;
/* Program zone reset */
pwr_ctrl_wr(cpu, ZONE_RESET_STATE_MASK | ZONE_BLK_RST_ASSERT_MASK |
ZONE_PWR_DN_REQ_MASK);
/* Verify zone reset */
tmp = pwr_ctrl_rd(cpu);
if (!(tmp & ZONE_RESET_STATE_MASK))
pr_err("%s: Zone reset bit for CPU %d not asserted!\n",
__func__, cpu);
/* Wait for power down */
do {
tmp = pwr_ctrl_rd(cpu);
} while (!(tmp & ZONE_PWR_OFF_STATE_MASK));
/* Settle-time from Broadcom-internal DVT reference code */
udelay(7);
/* Assert reset on the CPU */
cpu_rst_cfg_set(cpu, 1);
return 1;
}
#endif /* CONFIG_HOTPLUG_CPU */
static int __init setup_hifcpubiuctrl_regs(struct device_node *np)
{
int rc = 0;
char *name;
struct device_node *syscon_np = NULL;
name = "syscon-cpu";
syscon_np = of_parse_phandle(np, name, 0);
if (!syscon_np) {
pr_err("can't find phandle %s\n", name);
rc = -EINVAL;
goto cleanup;
}
cpubiuctrl_block = of_iomap(syscon_np, 0);
if (!cpubiuctrl_block) {
pr_err("iomap failed for cpubiuctrl_block\n");
rc = -EINVAL;
goto cleanup;
}
rc = of_property_read_u32_index(np, name, CPU0_PWR_ZONE_CTRL_REG,
&cpu0_pwr_zone_ctrl_reg);
if (rc) {
pr_err("failed to read 1st entry from %s property (%d)\n", name,
rc);
rc = -EINVAL;
goto cleanup;
}
rc = of_property_read_u32_index(np, name, CPU_RESET_CONFIG_REG,
&cpu_rst_cfg_reg);
if (rc) {
pr_err("failed to read 2nd entry from %s property (%d)\n", name,
rc);
rc = -EINVAL;
goto cleanup;
}
cleanup:
if (syscon_np)
of_node_put(syscon_np);
return rc;
}
static int __init setup_hifcont_regs(struct device_node *np)
{
int rc = 0;
char *name;
struct device_node *syscon_np = NULL;
name = "syscon-cont";
syscon_np = of_parse_phandle(np, name, 0);
if (!syscon_np) {
pr_err("can't find phandle %s\n", name);
rc = -EINVAL;
goto cleanup;
}
hif_cont_block = of_iomap(syscon_np, 0);
if (!hif_cont_block) {
pr_err("iomap failed for hif_cont_block\n");
rc = -EINVAL;
goto cleanup;
}
/* offset is at top of hif_cont_block */
hif_cont_reg = 0;
cleanup:
if (syscon_np)
of_node_put(syscon_np);
return rc;
}
static void __init brcmstb_cpu_ctrl_setup(unsigned int max_cpus)
{
int rc;
struct device_node *np;
char *name;
name = "brcm,brcmstb-smpboot";
np = of_find_compatible_node(NULL, NULL, name);
if (!np) {
pr_err("can't find compatible node %s\n", name);
return;
}
rc = setup_hifcpubiuctrl_regs(np);
if (rc)
return;
rc = setup_hifcont_regs(np);
if (rc)
return;
}
static DEFINE_SPINLOCK(boot_lock);
static void brcmstb_secondary_init(unsigned int cpu)
{
/*
* Synchronise with the boot thread.
*/
spin_lock(&boot_lock);
spin_unlock(&boot_lock);
}
static int brcmstb_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
/*
* set synchronisation state between this boot processor
* and the secondary one
*/
spin_lock(&boot_lock);
/* Bring up power to the core if necessary */
if (brcmstb_cpu_get_power_state(cpu) == 0)
brcmstb_cpu_power_on(cpu);
brcmstb_cpu_boot(cpu);
/*
* now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
spin_unlock(&boot_lock);
return 0;
}
static struct smp_operations brcmstb_smp_ops __initdata = {
.smp_prepare_cpus = brcmstb_cpu_ctrl_setup,
.smp_secondary_init = brcmstb_secondary_init,
.smp_boot_secondary = brcmstb_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_kill = brcmstb_cpu_kill,
.cpu_die = brcmstb_cpu_die,
#endif
};
CPU_METHOD_OF_DECLARE(brcmstb_smp, "brcm,brahma-b15", &brcmstb_smp_ops);

1
arch/arm/mach-exynos/mcpm-exynos.c
View File

@ -43,7 +43,6 @@
"mcr p15, 0, r0, c1, c0, 0 @ set SCTLR\n\t" \
"isb\n\t"\
"bl v7_flush_dcache_"__stringify(level)"\n\t" \
"clrex\n\t"\
"mrc p15, 0, r0, c1, c0, 1 @ get ACTLR\n\t" \
"bic r0, r0, #(1 << 6) @ disable local coherency\n\t" \
/* Dummy Load of a device register to avoid Erratum 799270 */ \

2
arch/arm/mach-omap2/board-flash.c
View File

@ -142,7 +142,7 @@ __init board_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs,
board_nand_data.nr_parts = nr_parts;
board_nand_data.devsize = nand_type;
board_nand_data.ecc_opt = OMAP_ECC_HAM1_CODE_HW;
board_nand_data.ecc_opt = OMAP_ECC_HAM1_CODE_SW;
gpmc_nand_init(&board_nand_data, gpmc_t);
}
#endif /* CONFIG_MTD_NAND_OMAP2 || CONFIG_MTD_NAND_OMAP2_MODULE */

3
arch/arm/mach-omap2/gpmc-nand.c
View File

@ -49,7 +49,8 @@ static bool gpmc_hwecc_bch_capable(enum omap_ecc ecc_opt)
return 0;
/* legacy platforms support only HAM1 (1-bit Hamming) ECC scheme */
if (ecc_opt == OMAP_ECC_HAM1_CODE_HW)
if (ecc_opt == OMAP_ECC_HAM1_CODE_HW ||
ecc_opt == OMAP_ECC_HAM1_CODE_SW)
return 1;
else
return 0;

7
arch/arm/mach-omap2/gpmc.c
View File

@ -1403,8 +1403,11 @@ static int gpmc_probe_nand_child(struct platform_device *pdev,
pr_err("%s: ti,nand-ecc-opt not found\n", __func__);
return -ENODEV;
}
if (!strcmp(s, "ham1") || !strcmp(s, "sw") ||
!strcmp(s, "hw") || !strcmp(s, "hw-romcode"))
if (!strcmp(s, "sw"))
gpmc_nand_data->ecc_opt = OMAP_ECC_HAM1_CODE_SW;
else if (!strcmp(s, "ham1") ||
!strcmp(s, "hw") || !strcmp(s, "hw-romcode"))
gpmc_nand_data->ecc_opt =
OMAP_ECC_HAM1_CODE_HW;
else if (!strcmp(s, "bch4"))

2
arch/arm/mach-omap2/id.c
View File

@ -663,7 +663,7 @@ void __init dra7xxx_check_revision(void)
default:
/* Unknown default to latest silicon rev as default*/
pr_warn("%s: unknown idcode=0x%08x (hawkeye=0x%08x,rev=0x%d)\n",
pr_warn("%s: unknown idcode=0x%08x (hawkeye=0x%08x,rev=0x%x)\n",
__func__, idcode, hawkeye, rev);
omap_revision = DRA752_REV_ES1_1;
}

2
arch/arm/mach-omap2/omap_device.c
View File

@ -56,7 +56,7 @@ static void _add_clkdev(struct omap_device *od, const char *clk_alias,
r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias);
if (!IS_ERR(r)) {
dev_warn(&od->pdev->dev,
dev_dbg(&od->pdev->dev,
"alias %s already exists\n", clk_alias);
clk_put(r);
return;

7
arch/arm/mach-omap2/omap_hwmod.c
View File

@ -2185,6 +2185,8 @@ static int _enable(struct omap_hwmod *oh)
oh->mux->pads_dynamic))) {
omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED);
_reconfigure_io_chain();
} else if (oh->flags & HWMOD_FORCE_MSTANDBY) {
_reconfigure_io_chain();
}
_add_initiator_dep(oh, mpu_oh);
@ -2291,6 +2293,8 @@ static int _idle(struct omap_hwmod *oh)
if (oh->mux && oh->mux->pads_dynamic) {
omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE);
_reconfigure_io_chain();
} else if (oh->flags & HWMOD_FORCE_MSTANDBY) {
_reconfigure_io_chain();
}
oh->_state = _HWMOD_STATE_IDLE;
@ -3345,6 +3349,9 @@ int __init omap_hwmod_register_links(struct omap_hwmod_ocp_if **ois)
if (!ois)
return 0;
if (ois[0] == NULL) /* Empty list */
return 0;
if (!linkspace) {
if (_alloc_linkspace(ois)) {
pr_err("omap_hwmod: could not allocate link space\n");

22
arch/arm/mach-omap2/omap_hwmod_7xx_data.c
View File

@ -35,6 +35,7 @@
#include "i2c.h"
#include "mmc.h"
#include "wd_timer.h"
#include "soc.h"
/* Base offset for all DRA7XX interrupts external to MPUSS */
#define DRA7XX_IRQ_GIC_START 32
@ -3261,7 +3262,6 @@ static struct omap_hwmod_ocp_if *dra7xx_hwmod_ocp_ifs[] __initdata = {
&dra7xx_l4_per3__usb_otg_ss1,
&dra7xx_l4_per3__usb_otg_ss2,
&dra7xx_l4_per3__usb_otg_ss3,
&dra7xx_l4_per3__usb_otg_ss4,
&dra7xx_l3_main_1__vcp1,
&dra7xx_l4_per2__vcp1,
&dra7xx_l3_main_1__vcp2,
@ -3270,8 +3270,26 @@ static struct omap_hwmod_ocp_if *dra7xx_hwmod_ocp_ifs[] __initdata = {
NULL,
};
static struct omap_hwmod_ocp_if *dra74x_hwmod_ocp_ifs[] __initdata = {
&dra7xx_l4_per3__usb_otg_ss4,
NULL,
};
static struct omap_hwmod_ocp_if *dra72x_hwmod_ocp_ifs[] __initdata = {
NULL,
};
int __init dra7xx_hwmod_init(void)
{
int ret;
omap_hwmod_init();
return omap_hwmod_register_links(dra7xx_hwmod_ocp_ifs);
ret = omap_hwmod_register_links(dra7xx_hwmod_ocp_ifs);
if (!ret && soc_is_dra74x())
return omap_hwmod_register_links(dra74x_hwmod_ocp_ifs);
else if (!ret && soc_is_dra72x())
return omap_hwmod_register_links(dra72x_hwmod_ocp_ifs);
return ret;
}

6
arch/arm/mach-omap2/soc.h
View File

@ -245,6 +245,8 @@ IS_AM_SUBCLASS(437x, 0x437)
#define soc_is_omap54xx() 0
#define soc_is_omap543x() 0
#define soc_is_dra7xx() 0
#define soc_is_dra74x() 0
#define soc_is_dra72x() 0
#if defined(MULTI_OMAP2)
# if defined(CONFIG_ARCH_OMAP2)
@ -393,7 +395,11 @@ IS_OMAP_TYPE(3430, 0x3430)
#if defined(CONFIG_SOC_DRA7XX)
#undef soc_is_dra7xx
#undef soc_is_dra74x
#undef soc_is_dra72x
#define soc_is_dra7xx() (of_machine_is_compatible("ti,dra7"))
#define soc_is_dra74x() (of_machine_is_compatible("ti,dra74"))
#define soc_is_dra72x() (of_machine_is_compatible("ti,dra72"))
#endif
/* Various silicon revisions for omap2 */

4
arch/arm/mach-shmobile/clock-r8a7790.c
View File

@ -183,8 +183,8 @@ enum {
static struct clk div4_clks[DIV4_NR] = {
[DIV4_SDH] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 8, 0x0dff, CLK_ENABLE_ON_INIT),
[DIV4_SD0] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 4, 0x1de0, CLK_ENABLE_ON_INIT),
[DIV4_SD1] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 0, 0x1de0, CLK_ENABLE_ON_INIT),
[DIV4_SD0] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 4, 0x1df0, CLK_ENABLE_ON_INIT),
[DIV4_SD1] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 0, 0x1df0, CLK_ENABLE_ON_INIT),
};
/* DIV6 clocks */

2
arch/arm/mach-shmobile/clock-r8a7791.c
View File

@ -152,7 +152,7 @@ enum {
static struct clk div4_clks[DIV4_NR] = {
[DIV4_SDH] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 8, 0x0dff, CLK_ENABLE_ON_INIT),
[DIV4_SD0] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 4, 0x1de0, CLK_ENABLE_ON_INIT),
[DIV4_SD0] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 4, 0x1df0, CLK_ENABLE_ON_INIT),
};
/* DIV6 clocks */

2
arch/arm/mach-shmobile/clock-sh73a0.c
View File

@ -644,7 +644,7 @@ static struct clk_lookup lookups[] = {
CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP207]), /* SCIFA5 */
CLKDEV_DEV_ID("e6cb0000.serial", &mstp_clks[MSTP207]), /* SCIFA5 */
CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP206]), /* SCIFB */
CLKDEV_DEV_ID("0xe6c3000.serial", &mstp_clks[MSTP206]), /* SCIFB */
CLKDEV_DEV_ID("e6c3000.serial", &mstp_clks[MSTP206]), /* SCIFB */
CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */
CLKDEV_DEV_ID("e6c40000.serial", &mstp_clks[MSTP204]), /* SCIFA0 */
CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */

14
arch/arm/mach-vexpress/spc.c
View File

@ -426,9 +426,15 @@ static int ve_spc_populate_opps(uint32_t cluster)
static int ve_init_opp_table(struct device *cpu_dev)
{
int cluster = topology_physical_package_id(cpu_dev->id);
int idx, ret = 0, max_opp = info->num_opps[cluster];
struct ve_spc_opp *opps = info->opps[cluster];
int cluster;
int idx, ret = 0, max_opp;
struct ve_spc_opp *opps;
cluster = topology_physical_package_id(cpu_dev->id);
cluster = cluster < 0 ? 0 : cluster;
max_opp = info->num_opps[cluster];
opps = info->opps[cluster];
for (idx = 0; idx < max_opp; idx++, opps++) {
ret = dev_pm_opp_add(cpu_dev, opps->freq * 1000, opps->u_volt);
@ -537,6 +543,8 @@ static struct clk *ve_spc_clk_register(struct device *cpu_dev)
spc->hw.init = &init;
spc->cluster = topology_physical_package_id(cpu_dev->id);
spc->cluster = spc->cluster < 0 ? 0 : spc->cluster;
init.name = dev_name(cpu_dev);
init.ops = &clk_spc_ops;
init.flags = CLK_IS_ROOT | CLK_GET_RATE_NOCACHE;

6
arch/arm/mm/abort-ev6.S
View File

@ -17,12 +17,6 @@
*/
.align 5
ENTRY(v6_early_abort)
#ifdef CONFIG_CPU_V6
sub r1, sp, #4 @ Get unused stack location
strex r0, r1, [r1] @ Clear the exclusive monitor
#elif defined(CONFIG_CPU_32v6K)
clrex
#endif
mrc p15, 0, r1, c5, c0, 0 @ get FSR
mrc p15, 0, r0, c6, c0, 0 @ get FAR
/*

6
arch/arm/mm/abort-ev7.S
View File

@ -13,12 +13,6 @@
*/
.align 5
ENTRY(v7_early_abort)
/*
* The effect of data aborts on on the exclusive access monitor are
* UNPREDICTABLE. Do a CLREX to clear the state
*/
clrex
mrc p15, 0, r1, c5, c0, 0 @ get FSR
mrc p15, 0, r0, c6, c0, 0 @ get FAR

1
arch/hexagon/mm/cache.c
View File

@ -68,6 +68,7 @@ void flush_icache_range(unsigned long start, unsigned long end)
);
local_irq_restore(flags);
}
EXPORT_SYMBOL(flush_icache_range);
void hexagon_clean_dcache_range(unsigned long start, unsigned long end)
{

2
arch/ia64/Kconfig
View File

@ -549,8 +549,6 @@ source "drivers/sn/Kconfig"
config KEXEC
bool "kexec system call"
depends on !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
select CRYPTO
select CRYPTO_SHA256
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot

2
arch/m68k/Kconfig
View File

@ -91,8 +91,6 @@ config MMU_SUN3
config KEXEC
bool "kexec system call"
depends on M68KCLASSIC
select CRYPTO
select CRYPTO_SHA256
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot

2
arch/mips/Kconfig
View File

@ -2396,8 +2396,6 @@ source "kernel/Kconfig.preempt"
config KEXEC
bool "Kexec system call"
select CRYPTO
select CRYPTO_SHA256
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot

2
arch/powerpc/Kconfig
View File

@ -399,8 +399,6 @@ config PPC64_SUPPORTS_MEMORY_FAILURE
config KEXEC
bool "kexec system call"
depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
select CRYPTO
select CRYPTO_SHA256
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot

2
arch/s390/Kconfig
View File

@ -48,8 +48,6 @@ config ARCH_SUPPORTS_DEBUG_PAGEALLOC
config KEXEC
def_bool y
select CRYPTO
select CRYPTO_SHA256
config AUDIT_ARCH
def_bool y

5
arch/s390/include/uapi/asm/unistd.h
View File

@ -283,7 +283,10 @@
#define __NR_sched_setattr 345
#define __NR_sched_getattr 346
#define __NR_renameat2 347
#define NR_syscalls 348
#define __NR_seccomp 348
#define __NR_getrandom 349
#define __NR_memfd_create 350
#define NR_syscalls 351
/*
* There are some system calls that are not present on 64 bit, some

3
arch/s390/kernel/compat_wrapper.c
View File

@ -214,3 +214,6 @@ COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, fla
COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);
COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags);
COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, const char __user *, uargs)
COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags)
COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags)

7
arch/s390/kernel/ipl.c
View File

@ -2060,6 +2060,13 @@ void s390_reset_system(void (*func)(void *), void *data)
S390_lowcore.program_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
/*
* Clear subchannel ID and number to signal new kernel that no CCW or
* SCSI IPL has been done (for kexec and kdump)
*/
S390_lowcore.subchannel_id = 0;
S390_lowcore.subchannel_nr = 0;
/* Store status at absolute zero */
store_status();

19
arch/s390/kernel/setup.c
View File

@ -24,6 +24,7 @@
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/random.h>
#include <linux/user.h>
#include <linux/tty.h>
#include <linux/ioport.h>
@ -61,6 +62,7 @@
#include <asm/diag.h>
#include <asm/os_info.h>
#include <asm/sclp.h>
#include <asm/sysinfo.h>
#include "entry.h"
/*
@ -766,6 +768,7 @@ static void __init setup_hwcaps(void)
#endif
get_cpu_id(&cpu_id);
add_device_randomness(&cpu_id, sizeof(cpu_id));
switch (cpu_id.machine) {
case 0x9672:
#if !defined(CONFIG_64BIT)
@ -803,6 +806,19 @@ static void __init setup_hwcaps(void)
}
}
/*
* Add system information as device randomness
*/
static void __init setup_randomness(void)
{
struct sysinfo_3_2_2 *vmms;
vmms = (struct sysinfo_3_2_2 *) alloc_page(GFP_KERNEL);
if (vmms && stsi(vmms, 3, 2, 2) == 0 && vmms->count)
add_device_randomness(&vmms, vmms->count);
free_page((unsigned long) vmms);
}
/*
* Setup function called from init/main.c just after the banner
* was printed.
@ -901,6 +917,9 @@ void __init setup_arch(char **cmdline_p)
/* Setup zfcpdump support */
setup_zfcpdump();
/* Add system specific data to the random pool */
setup_randomness();
}
#ifdef CONFIG_32BIT

3
arch/s390/kernel/syscalls.S
View File

@ -356,3 +356,6 @@ SYSCALL(sys_finit_module,sys_finit_module,compat_sys_finit_module)
SYSCALL(sys_sched_setattr,sys_sched_setattr,compat_sys_sched_setattr) /* 345 */
SYSCALL(sys_sched_getattr,sys_sched_getattr,compat_sys_sched_getattr)
SYSCALL(sys_renameat2,sys_renameat2,compat_sys_renameat2)
SYSCALL(sys_seccomp,sys_seccomp,compat_sys_seccomp)
SYSCALL(sys_getrandom,sys_getrandom,compat_sys_getrandom)
SYSCALL(sys_memfd_create,sys_memfd_create,compat_sys_memfd_create) /* 350 */

2
arch/sh/Kconfig
View File

@ -598,8 +598,6 @@ source kernel/Kconfig.hz
config KEXEC
bool "kexec system call (EXPERIMENTAL)"
depends on SUPERH32 && MMU
select CRYPTO
select CRYPTO_SHA256
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot

1
arch/sh/mm/cache.c
View File

@ -229,6 +229,7 @@ void flush_icache_range(unsigned long start, unsigned long end)
cacheop_on_each_cpu(local_flush_icache_range, (void *)&data, 1);
}
EXPORT_SYMBOL(flush_icache_range);
void flush_icache_page(struct vm_area_struct *vma, struct page *page)
{

2
arch/tile/Kconfig
View File

@ -191,8 +191,6 @@ source "kernel/Kconfig.hz"
config KEXEC
bool "kexec system call"
select CRYPTO
select CRYPTO_SHA256
---help---
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot

1
arch/tile/kernel/smp.c
View File

@ -183,6 +183,7 @@ void flush_icache_range(unsigned long start, unsigned long end)
preempt_enable();
}
}
EXPORT_SYMBOL(flush_icache_range);
/* Called when smp_send_reschedule() triggers IRQ_RESCHEDULE. */

9
arch/unicore32/kernel/signal.c
View File

@ -254,7 +254,8 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set,
err |= setup_sigframe(frame, regs, set);
if (err == 0)
err |= setup_return(regs, &ksig->ka, frame->retcode, frame, usig);
err |= setup_return(regs, &ksig->ka, frame->retcode, frame,
ksig->sig);
return err;
}
@ -276,7 +277,8 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
err |= __save_altstack(&frame->sig.uc.uc_stack, regs->UCreg_sp);
err |= setup_sigframe(&frame->sig, regs, set);
if (err == 0)
err |= setup_return(regs, &ksig->ka, frame->sig.retcode, frame, usig);
err |= setup_return(regs, &ksig->ka, frame->sig.retcode, frame,
ksig->sig);
if (err == 0) {
/*
@ -303,7 +305,6 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs,
int syscall)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
sigset_t *oldset = sigmask_to_save();
int usig = ksig->sig;
int ret;
@ -373,7 +374,7 @@ static void do_signal(struct pt_regs *regs, int syscall)
if (!user_mode(regs))
return;
if (get_signsl(&ksig)) {
if (get_signal(&ksig)) {
handle_signal(&ksig, regs, syscall);
return;
}

4
arch/x86/Kbuild
View File

@ -17,6 +17,4 @@ obj-$(CONFIG_IA32_EMULATION) += ia32/
obj-y += platform/
obj-y += net/
ifeq ($(CONFIG_X86_64),y)
obj-$(CONFIG_KEXEC) += purgatory/
endif
obj-$(CONFIG_KEXEC_FILE) += purgatory/

18
arch/x86/Kconfig
View File

@ -1585,9 +1585,6 @@ source kernel/Kconfig.hz
config KEXEC
bool "kexec system call"
select BUILD_BIN2C
select CRYPTO
select CRYPTO_SHA256
---help---
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot
@ -1602,9 +1599,22 @@ config KEXEC
interface is strongly in flux, so no good recommendation can be
made.
config KEXEC_FILE
bool "kexec file based system call"
select BUILD_BIN2C
depends on KEXEC
depends on X86_64
depends on CRYPTO=y
depends on CRYPTO_SHA256=y
---help---
This is new version of kexec system call. This system call is
file based and takes file descriptors as system call argument
for kernel and initramfs as opposed to list of segments as
accepted by previous system call.
config KEXEC_VERIFY_SIG
bool "Verify kernel signature during kexec_file_load() syscall"
depends on KEXEC
depends on KEXEC_FILE
---help---
This option makes kernel signature verification mandatory for
kexec_file_load() syscall. If kernel is signature can not be

6
arch/x86/Makefile
View File

@ -184,11 +184,8 @@ archheaders:
$(Q)$(MAKE) $(build)=arch/x86/syscalls all
archprepare:
ifeq ($(CONFIG_KEXEC),y)
# Build only for 64bit. No loaders for 32bit yet.
ifeq ($(CONFIG_X86_64),y)
ifeq ($(CONFIG_KEXEC_FILE),y)
$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
endif
endif
###
@ -254,6 +251,7 @@ archclean:
$(Q)rm -rf $(objtree)/arch/x86_64
$(Q)$(MAKE) $(clean)=$(boot)
$(Q)$(MAKE) $(clean)=arch/x86/tools
$(Q)$(MAKE) $(clean)=arch/x86/purgatory
PHONY += kvmconfig
kvmconfig:

2
arch/x86/include/asm/io_apic.h
View File

@ -227,6 +227,8 @@ static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned
extern void io_apic_eoi(unsigned int apic, unsigned int vector);
extern bool mp_should_keep_irq(struct device *dev);
#else /* !CONFIG_X86_IO_APIC */
#define io_apic_assign_pci_irqs 0

9
arch/x86/include/asm/pgtable.h
View File

@ -131,8 +131,13 @@ static inline int pte_exec(pte_t pte)
static inline int pte_special(pte_t pte)
{
return (pte_flags(pte) & (_PAGE_PRESENT|_PAGE_SPECIAL)) ==
(_PAGE_PRESENT|_PAGE_SPECIAL);
/*
* See CONFIG_NUMA_BALANCING pte_numa in include/asm-generic/pgtable.h.
* On x86 we have _PAGE_BIT_NUMA == _PAGE_BIT_GLOBAL+1 ==
* __PAGE_BIT_SOFTW1 == _PAGE_BIT_SPECIAL.
*/
return (pte_flags(pte) & _PAGE_SPECIAL) &&
(pte_flags(pte) & (_PAGE_PRESENT|_PAGE_PROTNONE));
}
static inline unsigned long pte_pfn(pte_t pte)

2
arch/x86/kernel/Makefile
View File

@ -71,6 +71,7 @@ obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o
obj-$(CONFIG_X86_TSC) += trace_clock.o
obj-$(CONFIG_KEXEC) += machine_kexec_$(BITS).o
obj-$(CONFIG_KEXEC) += relocate_kernel_$(BITS).o crash.o
obj-$(CONFIG_KEXEC_FILE) += kexec-bzimage64.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump_$(BITS).o
obj-y += kprobes/
obj-$(CONFIG_MODULES) += module.o
@ -118,5 +119,4 @@ ifeq ($(CONFIG_X86_64),y)
obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
obj-y += vsmp_64.o
obj-$(CONFIG_KEXEC) += kexec-bzimage64.o
endif

27
arch/x86/kernel/apic/io_apic.c
View File

@ -1070,6 +1070,11 @@ static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin,
}
if (flags & IOAPIC_MAP_ALLOC) {
/* special handling for legacy IRQs */
if (irq < nr_legacy_irqs() && info->count == 1 &&
mp_irqdomain_map(domain, irq, pin) != 0)
irq = -1;
if (irq > 0)
info->count++;
else if (info->count == 0)
@ -3896,7 +3901,15 @@ int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq,
info->polarity = 1;
}
info->node = NUMA_NO_NODE;
info->set = 1;
/*
* setup_IO_APIC_irqs() programs all legacy IRQs with default
* trigger and polarity attributes. Don't set the flag for that
* case so the first legacy IRQ user could reprogram the pin
* with real trigger and polarity attributes.
*/
if (virq >= nr_legacy_irqs() || info->count)
info->set = 1;
}
set_io_apic_irq_attr(&attr, ioapic, hwirq, info->trigger,
info->polarity);
@ -3946,6 +3959,18 @@ int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node)
return ret;
}
bool mp_should_keep_irq(struct device *dev)
{
if (dev->power.is_prepared)
return true;
#ifdef CONFIG_PM_RUNTIME
if (dev->power.runtime_status == RPM_SUSPENDING)
return true;
#endif
return false;
}
/* Enable IOAPIC early just for system timer */
void __init pre_init_apic_IRQ0(void)
{

6
arch/x86/kernel/crash.c
View File

@ -182,8 +182,7 @@ void native_machine_crash_shutdown(struct pt_regs *regs)
crash_save_cpu(regs, safe_smp_processor_id());
}
#ifdef CONFIG_X86_64
#ifdef CONFIG_KEXEC_FILE
static int get_nr_ram_ranges_callback(unsigned long start_pfn,
unsigned long nr_pfn, void *arg)
{
@ -696,5 +695,4 @@ int crash_load_segments(struct kimage *image)
return ret;
}
#endif /* CONFIG_X86_64 */
#endif /* CONFIG_KEXEC_FILE */

2
arch/x86/kernel/irqinit.c
View File

@ -203,7 +203,7 @@ void __init native_init_IRQ(void)
set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]);
}
if (!acpi_ioapic && !of_ioapic)
if (!acpi_ioapic && !of_ioapic && nr_legacy_irqs())
setup_irq(2, &irq2);
#ifdef CONFIG_X86_32

11
arch/x86/kernel/machine_kexec_64.c
View File

@ -25,9 +25,11 @@
#include <asm/debugreg.h>
#include <asm/kexec-bzimage64.h>
#ifdef CONFIG_KEXEC_FILE
static struct kexec_file_ops *kexec_file_loaders[] = {
&kexec_bzImage64_ops,
};
#endif
static void free_transition_pgtable(struct kimage *image)
{
@ -178,6 +180,7 @@ static void load_segments(void)
);
}
#ifdef CONFIG_KEXEC_FILE
/* Update purgatory as needed after various image segments have been prepared */
static int arch_update_purgatory(struct kimage *image)
{
@ -209,6 +212,12 @@ static int arch_update_purgatory(struct kimage *image)
return ret;
}
#else /* !CONFIG_KEXEC_FILE */
static inline int arch_update_purgatory(struct kimage *image)
{
return 0;
}
#endif /* CONFIG_KEXEC_FILE */
int machine_kexec_prepare(struct kimage *image)
{
@ -329,6 +338,7 @@ void arch_crash_save_vmcoreinfo(void)
/* arch-dependent functionality related to kexec file-based syscall */
#ifdef CONFIG_KEXEC_FILE
int arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
unsigned long buf_len)
{
@ -522,3 +532,4 @@ overflow:
(int)ELF64_R_TYPE(rel[i].r_info), value);
return -ENOEXEC;
}
#endif /* CONFIG_KEXEC_FILE */

2
arch/x86/kernel/time.c
View File

@ -68,6 +68,8 @@ static struct irqaction irq0 = {
void __init setup_default_timer_irq(void)
{
if (!nr_legacy_irqs())
return;
setup_irq(0, &irq0);
}

2
arch/x86/pci/intel_mid_pci.c
View File

@ -229,7 +229,7 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev)
static void intel_mid_pci_irq_disable(struct pci_dev *dev)
{
if (!dev->dev.power.is_prepared && dev->irq > 0)
if (!mp_should_keep_irq(&dev->dev) && dev->irq > 0)
mp_unmap_irq(dev->irq);
}

2
arch/x86/pci/irq.c
View File

@ -1256,7 +1256,7 @@ static int pirq_enable_irq(struct pci_dev *dev)
static void pirq_disable_irq(struct pci_dev *dev)
{
if (io_apic_assign_pci_irqs && !dev->dev.power.is_prepared &&
if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) &&
dev->irq) {
mp_unmap_irq(dev->irq);
dev->irq = 0;

6
arch/x86/purgatory/Makefile
View File

@ -11,6 +11,7 @@ targets += purgatory.ro
# sure how to relocate those. Like kexec-tools, use custom flags.
KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -MD -Os -mcmodel=large
KBUILD_CFLAGS += -m$(BITS)
$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
$(call if_changed,ld)
@ -24,7 +25,4 @@ $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
$(call if_changed,bin2c)
# No loaders for 32bits yet.
ifeq ($(CONFIG_X86_64),y)
obj-$(CONFIG_KEXEC) += kexec-purgatory.o
endif
obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o

92
arch/xtensa/Kconfig
View File

@ -4,24 +4,23 @@ config ZONE_DMA
config XTENSA
def_bool y
select ARCH_WANT_FRAME_POINTERS
select HAVE_IDE
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
select VIRT_TO_BUS
select GENERIC_IRQ_SHOW
select GENERIC_SCHED_CLOCK
select MODULES_USE_ELF_RELA
select GENERIC_PCI_IOMAP
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_WANT_OPTIONAL_GPIOLIB
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
select IRQ_DOMAIN
select HAVE_OPROFILE
select COMMON_CLK
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
select GENERIC_IRQ_SHOW
select GENERIC_PCI_IOMAP
select GENERIC_SCHED_CLOCK
select HAVE_FUNCTION_TRACER
select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_OPROFILE
select HAVE_PERF_EVENTS
select COMMON_CLK
select IRQ_DOMAIN
select MODULES_USE_ELF_RELA
select VIRT_TO_BUS
help
Xtensa processors are 32-bit RISC machines designed by Tensilica
primarily for embedded systems. These processors are both
@ -62,7 +61,9 @@ config TRACE_IRQFLAGS_SUPPORT
def_bool y
config MMU
def_bool n
bool
default n if !XTENSA_VARIANT_CUSTOM
default XTENSA_VARIANT_MMU if XTENSA_VARIANT_CUSTOM
config VARIANT_IRQ_SWITCH
def_bool n
@ -102,8 +103,40 @@ config XTENSA_VARIANT_S6000
select VARIANT_IRQ_SWITCH
select ARCH_REQUIRE_GPIOLIB
select XTENSA_CALIBRATE_CCOUNT
config XTENSA_VARIANT_CUSTOM
bool "Custom Xtensa processor configuration"
select MAY_HAVE_SMP
select HAVE_XTENSA_GPIO32
help
Select this variant to use a custom Xtensa processor configuration.
You will be prompted for a processor variant CORENAME.
endchoice
config XTENSA_VARIANT_CUSTOM_NAME
string "Xtensa Processor Custom Core Variant Name"
depends on XTENSA_VARIANT_CUSTOM
help
Provide the name of a custom Xtensa processor variant.
This CORENAME selects arch/xtensa/variant/CORENAME.
Dont forget you have to select MMU if you have one.
config XTENSA_VARIANT_NAME
string
default "dc232b" if XTENSA_VARIANT_DC232B
default "dc233c" if XTENSA_VARIANT_DC233C
default "fsf" if XTENSA_VARIANT_FSF
default "s6000" if XTENSA_VARIANT_S6000
default XTENSA_VARIANT_CUSTOM_NAME if XTENSA_VARIANT_CUSTOM
config XTENSA_VARIANT_MMU
bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)"
depends on XTENSA_VARIANT_CUSTOM
default y
help
Build a Conventional Kernel with full MMU support,
ie: it supports a TLB with auto-loading, page protection.
config XTENSA_UNALIGNED_USER
bool "Unaligned memory access in use space"
help
@ -156,13 +189,9 @@ config HOTPLUG_CPU
Say N if you want to disable CPU hotplug.
config MATH_EMULATION
bool "Math emulation"
help
Can we use information of configuration file?
config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
bool "Initialize Xtensa MMU inside the Linux kernel code"
depends on MMU
default y
help
Earlier version initialized the MMU in the exception vector
@ -192,6 +221,7 @@ config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
config HIGHMEM
bool "High Memory Support"
depends on MMU
help
Linux can use the full amount of RAM in the system by
default. However, the default MMUv2 setup only maps the
@ -208,6 +238,32 @@ config HIGHMEM
If unsure, say Y.
config FAST_SYSCALL_XTENSA
bool "Enable fast atomic syscalls"
default n
help
fast_syscall_xtensa is a syscall that can make atomic operations
on UP kernel when processor has no s32c1i support.
This syscall is deprecated. It may have issues when called with
invalid arguments. It is provided only for backwards compatibility.
Only enable it if your userspace software requires it.
If unsure, say N.
config FAST_SYSCALL_SPILL_REGISTERS
bool "Enable spill registers syscall"
default n
help
fast_syscall_spill_registers is a syscall that spills all active
register windows of a calling userspace task onto its stack.
This syscall is deprecated. It may have issues when called with
invalid arguments. It is provided only for backwards compatibility.
Only enable it if your userspace software requires it.
If unsure, say N.
endmenu
config XTENSA_CALIBRATE_CCOUNT
@ -250,12 +306,14 @@ config XTENSA_PLATFORM_ISS
config XTENSA_PLATFORM_XT2000
bool "XT2000"
select HAVE_IDE
help
XT2000 is the name of Tensilica's feature-rich emulation platform.
This hardware is capable of running a full Linux distribution.
config XTENSA_PLATFORM_S6105
bool "S6105"
select HAVE_IDE
select SERIAL_CONSOLE
select NO_IOPORT_MAP

7
arch/xtensa/Makefile
View File

@ -4,6 +4,7 @@
# for more details.
#
# Copyright (C) 2001 - 2005 Tensilica Inc.
# Copyright (C) 2014 Cadence Design Systems Inc.
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
@ -13,11 +14,7 @@
# Core configuration.
# (Use VAR=<xtensa_config> to use another default compiler.)
variant-$(CONFIG_XTENSA_VARIANT_FSF) := fsf
variant-$(CONFIG_XTENSA_VARIANT_DC232B) := dc232b
variant-$(CONFIG_XTENSA_VARIANT_DC233C) := dc233c
variant-$(CONFIG_XTENSA_VARIANT_S6000) := s6000
variant-$(CONFIG_XTENSA_VARIANT_LINUX_CUSTOM) := custom
variant-y := $(patsubst "%",%,$(CONFIG_XTENSA_VARIANT_NAME))
VARIANT = $(variant-y)
export VARIANT

5
arch/xtensa/boot/dts/kc705.dts
View File

@ -4,8 +4,11 @@
/ {
compatible = "cdns,xtensa-kc705";
chosen {
bootargs = "earlycon=uart8250,mmio32,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000";
};
memory@0 {
device_type = "memory";
reg = <0x00000000 0x08000000>;
reg = <0x00000000 0x38000000>;
};
};

1
arch/xtensa/configs/common_defconfig
View File

@ -66,7 +66,6 @@ CONFIG_XTENSA_ARCH_LINUX_BE=y
CONFIG_MMU=y
# CONFIG_XTENSA_UNALIGNED_USER is not set
# CONFIG_PREEMPT is not set
# CONFIG_MATH_EMULATION is not set
# CONFIG_HIGHMEM is not set
#

3
arch/xtensa/configs/iss_defconfig
View File

@ -146,7 +146,6 @@ CONFIG_XTENSA_VARIANT_FSF=y
# CONFIG_XTENSA_VARIANT_S6000 is not set
# CONFIG_XTENSA_UNALIGNED_USER is not set
# CONFIG_PREEMPT is not set
# CONFIG_MATH_EMULATION is not set
CONFIG_XTENSA_CALIBRATE_CCOUNT=y
CONFIG_SERIAL_CONSOLE=y
CONFIG_XTENSA_ISS_NETWORK=y
@ -308,7 +307,7 @@ CONFIG_MISC_DEVICES=y
# EEPROM support
#
# CONFIG_EEPROM_93CX6 is not set
CONFIG_HAVE_IDE=y
# CONFIG_HAVE_IDE is not set
# CONFIG_IDE is not set
#

1
arch/xtensa/configs/s6105_defconfig
View File

@ -109,7 +109,6 @@ CONFIG_VARIANT_IRQ_SWITCH=y
CONFIG_XTENSA_VARIANT_S6000=y
# CONFIG_XTENSA_UNALIGNED_USER is not set
CONFIG_PREEMPT=y
# CONFIG_MATH_EMULATION is not set
# CONFIG_HIGHMEM is not set
CONFIG_XTENSA_CALIBRATE_CCOUNT=y
CONFIG_SERIAL_CONSOLE=y

2
arch/xtensa/include/asm/cacheflush.h
View File

@ -37,6 +37,7 @@
* specials for cache aliasing:
*
* __flush_invalidate_dcache_page_alias(vaddr,paddr)
* __invalidate_dcache_page_alias(vaddr,paddr)
* __invalidate_icache_page_alias(vaddr,paddr)
*/
@ -62,6 +63,7 @@ extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long);
extern void __invalidate_dcache_page_alias(unsigned long, unsigned long);
#else
static inline void __flush_invalidate_dcache_page_alias(unsigned long virt,
unsigned long phys) { }

30
arch/xtensa/include/asm/fixmap.h
View File

@ -23,8 +23,8 @@
* Here we define all the compile-time 'special' virtual
* addresses. The point is to have a constant address at
* compile time, but to set the physical address only
* in the boot process. We allocate these special addresses
* from the end of the consistent memory region backwards.
* in the boot process. We allocate these special addresses
* from the start of the consistent memory region upwards.
* Also this lets us do fail-safe vmalloc(), we
* can guarantee that these special addresses and
* vmalloc()-ed addresses never overlap.
@ -38,7 +38,8 @@ enum fixed_addresses {
#ifdef CONFIG_HIGHMEM
/* reserved pte's for temporary kernel mappings */
FIX_KMAP_BEGIN,
FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * NR_CPUS) - 1,
FIX_KMAP_END = FIX_KMAP_BEGIN +
(KM_TYPE_NR * NR_CPUS * DCACHE_N_COLORS) - 1,
#endif
__end_of_fixed_addresses
};
@ -47,7 +48,28 @@ enum fixed_addresses {
#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
#define FIXADDR_START ((FIXADDR_TOP - FIXADDR_SIZE) & PMD_MASK)
#include <asm-generic/fixmap.h>
#define __fix_to_virt(x) (FIXADDR_START + ((x) << PAGE_SHIFT))
#define __virt_to_fix(x) (((x) - FIXADDR_START) >> PAGE_SHIFT)
#ifndef __ASSEMBLY__
/*
* 'index to address' translation. If anyone tries to use the idx
* directly without translation, we catch the bug with a NULL-deference
* kernel oops. Illegal ranges of incoming indices are caught too.
*/
static __always_inline unsigned long fix_to_virt(const unsigned int idx)
{
BUILD_BUG_ON(idx >= __end_of_fixed_addresses);
return __fix_to_virt(idx);
}
static inline unsigned long virt_to_fix(const unsigned long vaddr)
{
BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
return __virt_to_fix(vaddr);
}
#endif
#define kmap_get_fixmap_pte(vaddr) \
pte_offset_kernel( \

40
arch/xtensa/include/asm/highmem.h
View File

@ -12,19 +12,55 @@
#ifndef _XTENSA_HIGHMEM_H
#define _XTENSA_HIGHMEM_H
#include <linux/wait.h>
#include <asm/cacheflush.h>
#include <asm/fixmap.h>
#include <asm/kmap_types.h>
#include <asm/pgtable.h>
#define PKMAP_BASE (FIXADDR_START - PMD_SIZE)
#define LAST_PKMAP PTRS_PER_PTE
#define PKMAP_BASE ((FIXADDR_START - \
(LAST_PKMAP + 1) * PAGE_SIZE) & PMD_MASK)
#define LAST_PKMAP (PTRS_PER_PTE * DCACHE_N_COLORS)
#define LAST_PKMAP_MASK (LAST_PKMAP - 1)
#define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
#define kmap_prot PAGE_KERNEL
#if DCACHE_WAY_SIZE > PAGE_SIZE
#define get_pkmap_color get_pkmap_color
static inline int get_pkmap_color(struct page *page)
{
return DCACHE_ALIAS(page_to_phys(page));
}
extern unsigned int last_pkmap_nr_arr[];
static inline unsigned int get_next_pkmap_nr(unsigned int color)
{
last_pkmap_nr_arr[color] =
(last_pkmap_nr_arr[color] + DCACHE_N_COLORS) & LAST_PKMAP_MASK;
return last_pkmap_nr_arr[color] + color;
}
static inline int no_more_pkmaps(unsigned int pkmap_nr, unsigned int color)
{
return pkmap_nr < DCACHE_N_COLORS;
}
static inline int get_pkmap_entries_count(unsigned int color)
{
return LAST_PKMAP / DCACHE_N_COLORS;
}
extern wait_queue_head_t pkmap_map_wait_arr[];
static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color)
{
return pkmap_map_wait_arr + color;
}
#endif
extern pte_t *pkmap_page_table;
void *kmap_high(struct page *page);

14
arch/xtensa/include/asm/page.h
View File

@ -78,7 +78,9 @@
# define DCACHE_ALIAS_EQ(a,b) ((((a) ^ (b)) & DCACHE_ALIAS_MASK) == 0)
#else
# define DCACHE_ALIAS_ORDER 0
# define DCACHE_ALIAS(a) ((void)(a), 0)
#endif
#define DCACHE_N_COLORS (1 << DCACHE_ALIAS_ORDER)
#if ICACHE_WAY_SIZE > PAGE_SIZE
# define ICACHE_ALIAS_ORDER (ICACHE_WAY_SHIFT - PAGE_SHIFT)
@ -134,6 +136,7 @@ static inline __attribute_const__ int get_order(unsigned long size)
#endif
struct page;
struct vm_area_struct;
extern void clear_page(void *page);
extern void copy_page(void *to, void *from);
@ -143,8 +146,15 @@ extern void copy_page(void *to, void *from);
*/
#if DCACHE_WAY_SIZE > PAGE_SIZE
extern void clear_user_page(void*, unsigned long, struct page*);
extern void copy_user_page(void*, void*, unsigned long, struct page*);
extern void clear_page_alias(void *vaddr, unsigned long paddr);
extern void copy_page_alias(void *to, void *from,
unsigned long to_paddr, unsigned long from_paddr);
#define clear_user_highpage clear_user_highpage
void clear_user_highpage(struct page *page, unsigned long vaddr);
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma);
#else
# define clear_user_page(page, vaddr, pg) clear_page(page)
# define copy_user_page(to, from, vaddr, pg) copy_page(to, from)

7
arch/xtensa/include/asm/pgtable.h
View File

@ -67,7 +67,12 @@
#define VMALLOC_START 0xC0000000
#define VMALLOC_END 0xC7FEFFFF
#define TLBTEMP_BASE_1 0xC7FF0000
#define TLBTEMP_BASE_2 0xC7FF8000
#define TLBTEMP_BASE_2 (TLBTEMP_BASE_1 + DCACHE_WAY_SIZE)
#if 2 * DCACHE_WAY_SIZE > ICACHE_WAY_SIZE
#define TLBTEMP_SIZE (2 * DCACHE_WAY_SIZE)
#else
#define TLBTEMP_SIZE ICACHE_WAY_SIZE
#endif
/*
* For the Xtensa architecture, the PTE layout is as follows:

5
arch/xtensa/include/asm/uaccess.h
View File

@ -52,7 +52,12 @@
*/
.macro get_fs ad, sp
GET_CURRENT(\ad,\sp)
#if THREAD_CURRENT_DS > 1020
addi \ad, \ad, TASK_THREAD
l32i \ad, \ad, THREAD_CURRENT_DS - TASK_THREAD
#else
l32i \ad, \ad, THREAD_CURRENT_DS
#endif
.endm
/*

19
arch/xtensa/include/uapi/asm/ioctls.h
View File

@ -28,17 +28,17 @@
#define TCSETSW 0x5403
#define TCSETSF 0x5404
#define TCGETA _IOR('t', 23, struct termio)
#define TCSETA _IOW('t', 24, struct termio)
#define TCSETAW _IOW('t', 25, struct termio)
#define TCSETAF _IOW('t', 28, struct termio)
#define TCGETA 0x80127417 /* _IOR('t', 23, struct termio) */
#define TCSETA 0x40127418 /* _IOW('t', 24, struct termio) */
#define TCSETAW 0x40127419 /* _IOW('t', 25, struct termio) */
#define TCSETAF 0x4012741C /* _IOW('t', 28, struct termio) */
#define TCSBRK _IO('t', 29)
#define TCXONC _IO('t', 30)
#define TCFLSH _IO('t', 31)
#define TIOCSWINSZ _IOW('t', 103, struct winsize)
#define TIOCGWINSZ _IOR('t', 104, struct winsize)
#define TIOCSWINSZ 0x40087467 /* _IOW('t', 103, struct winsize) */
#define TIOCGWINSZ 0x80087468 /* _IOR('t', 104, struct winsize) */
#define TIOCSTART _IO('t', 110) /* start output, like ^Q */
#define TIOCSTOP _IO('t', 111) /* stop output, like ^S */
#define TIOCOUTQ _IOR('t', 115, int) /* output queue size */
@ -88,7 +88,6 @@
#define TIOCSETD _IOW('T', 35, int)
#define TIOCGETD _IOR('T', 36, int)
#define TCSBRKP _IOW('T', 37, int) /* Needed for POSIX tcsendbreak()*/
#define TIOCTTYGSTRUCT _IOR('T', 38, struct tty_struct) /* For debugging only*/
#define TIOCSBRK _IO('T', 39) /* BSD compatibility */
#define TIOCCBRK _IO('T', 40) /* BSD compatibility */
#define TIOCGSID _IOR('T', 41, pid_t) /* Return the session ID of FD*/
@ -114,8 +113,10 @@
#define TIOCSERGETLSR _IOR('T', 89, unsigned int) /* Get line status reg. */
/* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
# define TIOCSER_TEMT 0x01 /* Transmitter physically empty */
#define TIOCSERGETMULTI _IOR('T', 90, struct serial_multiport_struct) /* Get multiport config */
#define TIOCSERSETMULTI _IOW('T', 91, struct serial_multiport_struct) /* Set multiport config */
#define TIOCSERGETMULTI 0x80a8545a /* Get multiport config */
/* _IOR('T', 90, struct serial_multiport_struct) */
#define TIOCSERSETMULTI 0x40a8545b /* Set multiport config */
/* _IOW('T', 91, struct serial_multiport_struct) */
#define TIOCMIWAIT _IO('T', 92) /* wait for a change on serial input line(s) */
#define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */

5
arch/xtensa/include/uapi/asm/unistd.h
View File

@ -739,7 +739,10 @@ __SYSCALL(334, sys_sched_setattr, 2)
#define __NR_sched_getattr 335
__SYSCALL(335, sys_sched_getattr, 3)
#define __NR_syscall_count 336
#define __NR_renameat2 336
__SYSCALL(336, sys_renameat2, 5)
#define __NR_syscall_count 337
/*
* sysxtensa syscall handler

130
arch/xtensa/kernel/align.S
View File

@ -8,6 +8,7 @@
* this archive for more details.
*
* Copyright (C) 2001 - 2005 Tensilica, Inc.
* Copyright (C) 2014 Cadence Design Systems Inc.
*
* Rewritten by Chris Zankel <chris@zankel.net>
*
@ -174,6 +175,10 @@ ENTRY(fast_unaligned)
s32i a0, a2, PT_AREG2
s32i a3, a2, PT_AREG3
rsr a3, excsave1
movi a4, fast_unaligned_fixup
s32i a4, a3, EXC_TABLE_FIXUP
/* Keep value of SAR in a0 */
rsr a0, sar
@ -225,10 +230,6 @@ ENTRY(fast_unaligned)
addx8 a5, a6, a5
jx a5 # jump into table
/* Invalid instruction, CRITICAL! */
.Linvalid_instruction_load:
j .Linvalid_instruction
/* Load: Load memory address. */
.Lload: movi a3, ~3
@ -272,18 +273,6 @@ ENTRY(fast_unaligned)
/* Set target register. */
1:
#if XCHAL_HAVE_LOOPS
rsr a5, lend # check if we reached LEND
bne a7, a5, 1f
rsr a5, lcount # and LCOUNT != 0
beqz a5, 1f
addi a5, a5, -1 # decrement LCOUNT and set
rsr a7, lbeg # set PC to LBEGIN
wsr a5, lcount
#endif
1: wsr a7, epc1 # skip load instruction
extui a4, a4, INSN_T, 4 # extract target register
movi a5, .Lload_table
addx8 a4, a4, a5
@ -326,6 +315,35 @@ ENTRY(fast_unaligned)
mov a3, a14 ; _j 1f; .align 8
mov a3, a15 ; _j 1f; .align 8
/* We cannot handle this exception. */
.extern _kernel_exception
.Linvalid_instruction_load:
.Linvalid_instruction_store:
movi a4, 0
rsr a3, excsave1
s32i a4, a3, EXC_TABLE_FIXUP
/* Restore a4...a8 and SAR, set SP, and jump to default exception. */
l32i a8, a2, PT_AREG8
l32i a7, a2, PT_AREG7
l32i a6, a2, PT_AREG6
l32i a5, a2, PT_AREG5
l32i a4, a2, PT_AREG4
wsr a0, sar
mov a1, a2
rsr a0, ps
bbsi.l a0, PS_UM_BIT, 2f # jump if user mode
movi a0, _kernel_exception
jx a0
2: movi a0, _user_exception
jx a0
1: # a7: instruction pointer, a4: instruction, a3: value
movi a6, 0 # mask: ffffffff:00000000
@ -353,17 +371,6 @@ ENTRY(fast_unaligned)
/* Get memory address */
1:
#if XCHAL_HAVE_LOOPS
rsr a4, lend # check if we reached LEND
bne a7, a4, 1f
rsr a4, lcount # and LCOUNT != 0
beqz a4, 1f
addi a4, a4, -1 # decrement LCOUNT and set
rsr a7, lbeg # set PC to LBEGIN
wsr a4, lcount
#endif
1: wsr a7, epc1 # skip store instruction
movi a4, ~3
and a4, a4, a8 # align memory address
@ -375,25 +382,25 @@ ENTRY(fast_unaligned)
#endif
__ssa8r a8
__src_b a7, a5, a6 # lo-mask F..F0..0 (BE) 0..0F..F (LE)
__src_b a8, a5, a6 # lo-mask F..F0..0 (BE) 0..0F..F (LE)
__src_b a6, a6, a5 # hi-mask 0..0F..F (BE) F..F0..0 (LE)
#ifdef UNALIGNED_USER_EXCEPTION
l32e a5, a4, -8
#else
l32i a5, a4, 0 # load lower address word
#endif
and a5, a5, a7 # mask
__sh a7, a3 # shift value
or a5, a5, a7 # or with original value
and a5, a5, a8 # mask
__sh a8, a3 # shift value
or a5, a5, a8 # or with original value
#ifdef UNALIGNED_USER_EXCEPTION
s32e a5, a4, -8
l32e a7, a4, -4
l32e a8, a4, -4
#else
s32i a5, a4, 0 # store
l32i a7, a4, 4 # same for upper address word
l32i a8, a4, 4 # same for upper address word
#endif
__sl a5, a3
and a6, a7, a6
and a6, a8, a6
or a6, a6, a5
#ifdef UNALIGNED_USER_EXCEPTION
s32e a6, a4, -4
@ -401,9 +408,27 @@ ENTRY(fast_unaligned)
s32i a6, a4, 4
#endif
/* Done. restore stack and return */
.Lexit:
#if XCHAL_HAVE_LOOPS
rsr a4, lend # check if we reached LEND
bne a7, a4, 1f
rsr a4, lcount # and LCOUNT != 0
beqz a4, 1f
addi a4, a4, -1 # decrement LCOUNT and set
rsr a7, lbeg # set PC to LBEGIN
wsr a4, lcount
#endif
1: wsr a7, epc1 # skip emulated instruction
/* Update icount if we're single-stepping in userspace. */
rsr a4, icountlevel
beqz a4, 1f
bgeui a4, LOCKLEVEL + 1, 1f
rsr a4, icount
addi a4, a4, 1
wsr a4, icount
1:
movi a4, 0
rsr a3, excsave1
s32i a4, a3, EXC_TABLE_FIXUP
@ -424,31 +449,40 @@ ENTRY(fast_unaligned)
l32i a2, a2, PT_AREG2
rfe
/* We cannot handle this exception. */
ENDPROC(fast_unaligned)
.extern _kernel_exception
.Linvalid_instruction_store:
.Linvalid_instruction:
ENTRY(fast_unaligned_fixup)
/* Restore a4...a8 and SAR, set SP, and jump to default exception. */
l32i a2, a3, EXC_TABLE_DOUBLE_SAVE
wsr a3, excsave1
l32i a8, a2, PT_AREG8
l32i a7, a2, PT_AREG7
l32i a6, a2, PT_AREG6
l32i a5, a2, PT_AREG5
l32i a4, a2, PT_AREG4
l32i a0, a2, PT_AREG2
xsr a0, depc # restore depc and a0
wsr a0, sar
mov a1, a2
rsr a0, exccause
s32i a0, a2, PT_DEPC # mark as a regular exception
rsr a0, ps
bbsi.l a2, PS_UM_BIT, 1f # jump if user mode
bbsi.l a0, PS_UM_BIT, 1f # jump if user mode
movi a0, _kernel_exception
rsr a0, exccause
addx4 a0, a0, a3 # find entry in table
l32i a0, a0, EXC_TABLE_FAST_KERNEL # load handler
l32i a3, a2, PT_AREG3
jx a0
1:
rsr a0, exccause
addx4 a0, a0, a3 # find entry in table
l32i a0, a0, EXC_TABLE_FAST_USER # load handler
l32i a3, a2, PT_AREG3
jx a0
1: movi a0, _user_exception
jx a0
ENDPROC(fast_unaligned)
ENDPROC(fast_unaligned_fixup)
#endif /* XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION */

54
arch/xtensa/kernel/entry.S
View File

@ -986,6 +986,8 @@ ENDPROC(fast_syscall_unrecoverable)
* j done
*/
#ifdef CONFIG_FAST_SYSCALL_XTENSA
#define TRY \
.section __ex_table, "a"; \
.word 66f, 67f; \
@ -1001,9 +1003,8 @@ ENTRY(fast_syscall_xtensa)
movi a7, 4 # sizeof(unsigned int)
access_ok a3, a7, a0, a2, .Leac # a0: scratch reg, a2: sp
addi a6, a6, -1 # assuming SYS_XTENSA_ATOMIC_SET = 1
_bgeui a6, SYS_XTENSA_COUNT - 1, .Lill
_bnei a6, SYS_XTENSA_ATOMIC_CMP_SWP - 1, .Lnswp
_bgeui a6, SYS_XTENSA_COUNT, .Lill
_bnei a6, SYS_XTENSA_ATOMIC_CMP_SWP, .Lnswp
/* Fall through for ATOMIC_CMP_SWP. */
@ -1015,27 +1016,26 @@ TRY s32i a5, a3, 0 # different, modify value
l32i a7, a2, PT_AREG7 # restore a7
l32i a0, a2, PT_AREG0 # restore a0
movi a2, 1 # and return 1
addi a6, a6, 1 # restore a6 (really necessary?)
rfe
1: l32i a7, a2, PT_AREG7 # restore a7
l32i a0, a2, PT_AREG0 # restore a0
movi a2, 0 # return 0 (note that we cannot set
addi a6, a6, 1 # restore a6 (really necessary?)
rfe
.Lnswp: /* Atomic set, add, and exg_add. */
TRY l32i a7, a3, 0 # orig
addi a6, a6, -SYS_XTENSA_ATOMIC_SET
add a0, a4, a7 # + arg
moveqz a0, a4, a6 # set
addi a6, a6, SYS_XTENSA_ATOMIC_SET
TRY s32i a0, a3, 0 # write new value
mov a0, a2
mov a2, a7
l32i a7, a0, PT_AREG7 # restore a7
l32i a0, a0, PT_AREG0 # restore a0
addi a6, a6, 1 # restore a6 (really necessary?)
rfe
CATCH
@ -1044,13 +1044,25 @@ CATCH
movi a2, -EFAULT
rfe
.Lill: l32i a7, a2, PT_AREG0 # restore a7
.Lill: l32i a7, a2, PT_AREG7 # restore a7
l32i a0, a2, PT_AREG0 # restore a0
movi a2, -EINVAL
rfe
ENDPROC(fast_syscall_xtensa)
#else /* CONFIG_FAST_SYSCALL_XTENSA */
ENTRY(fast_syscall_xtensa)
l32i a0, a2, PT_AREG0 # restore a0
movi a2, -ENOSYS
rfe
ENDPROC(fast_syscall_xtensa)
#endif /* CONFIG_FAST_SYSCALL_XTENSA */
/* fast_syscall_spill_registers.
*
@ -1066,6 +1078,8 @@ ENDPROC(fast_syscall_xtensa)
* Note: We assume the stack pointer is EXC_TABLE_KSTK in the fixup handler.
*/
#ifdef CONFIG_FAST_SYSCALL_SPILL_REGISTERS
ENTRY(fast_syscall_spill_registers)
/* Register a FIXUP handler (pass current wb as a parameter) */
@ -1400,6 +1414,18 @@ ENTRY(fast_syscall_spill_registers_fixup_return)
ENDPROC(fast_syscall_spill_registers_fixup_return)
#else /* CONFIG_FAST_SYSCALL_SPILL_REGISTERS */
ENTRY(fast_syscall_spill_registers)
l32i a0, a2, PT_AREG0 # restore a0
movi a2, -ENOSYS
rfe
ENDPROC(fast_syscall_spill_registers)
#endif /* CONFIG_FAST_SYSCALL_SPILL_REGISTERS */
#ifdef CONFIG_MMU
/*
* We should never get here. Bail out!
@ -1565,7 +1591,7 @@ ENTRY(fast_second_level_miss)
rsr a0, excvaddr
bltu a0, a3, 2f
addi a1, a0, -(2 << (DCACHE_ALIAS_ORDER + PAGE_SHIFT))
addi a1, a0, -TLBTEMP_SIZE
bgeu a1, a3, 2f
/* Check if we have to restore an ITLB mapping. */
@ -1820,7 +1846,6 @@ ENTRY(_switch_to)
entry a1, 16
mov a10, a2 # preserve 'prev' (a2)
mov a11, a3 # and 'next' (a3)
l32i a4, a2, TASK_THREAD_INFO
@ -1828,8 +1853,14 @@ ENTRY(_switch_to)
save_xtregs_user a4 a6 a8 a9 a12 a13 THREAD_XTREGS_USER
s32i a0, a10, THREAD_RA # save return address
s32i a1, a10, THREAD_SP # save stack pointer
#if THREAD_RA > 1020 || THREAD_SP > 1020
addi a10, a2, TASK_THREAD
s32i a0, a10, THREAD_RA - TASK_THREAD # save return address
s32i a1, a10, THREAD_SP - TASK_THREAD # save stack pointer
#else
s32i a0, a2, THREAD_RA # save return address
s32i a1, a2, THREAD_SP # save stack pointer
#endif
/* Disable ints while we manipulate the stack pointer. */
@ -1870,7 +1901,6 @@ ENTRY(_switch_to)
load_xtregs_user a5 a6 a8 a9 a12 a13 THREAD_XTREGS_USER
wsr a14, ps
mov a2, a10 # return 'prev'
rsync
retw

12
arch/xtensa/kernel/pci-dma.c
View File

@ -49,9 +49,8 @@ dma_alloc_coherent(struct device *dev,size_t size,dma_addr_t *handle,gfp_t flag)
/* We currently don't support coherent memory outside KSEG */
if (ret < XCHAL_KSEG_CACHED_VADDR
|| ret >= XCHAL_KSEG_CACHED_VADDR + XCHAL_KSEG_SIZE)
BUG();
BUG_ON(ret < XCHAL_KSEG_CACHED_VADDR ||
ret > XCHAL_KSEG_CACHED_VADDR + XCHAL_KSEG_SIZE - 1);
if (ret != 0) {
@ -68,10 +67,11 @@ EXPORT_SYMBOL(dma_alloc_coherent);
void dma_free_coherent(struct device *hwdev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
long addr=(long)vaddr+XCHAL_KSEG_CACHED_VADDR-XCHAL_KSEG_BYPASS_VADDR;
unsigned long addr = (unsigned long)vaddr +
XCHAL_KSEG_CACHED_VADDR - XCHAL_KSEG_BYPASS_VADDR;
if (addr < 0 || addr >= XCHAL_KSEG_SIZE)
BUG();
BUG_ON(addr < XCHAL_KSEG_CACHED_VADDR ||
addr > XCHAL_KSEG_CACHED_VADDR + XCHAL_KSEG_SIZE - 1);
free_pages(addr, get_order(size));
}

1
arch/xtensa/kernel/smp.c
View File

@ -571,6 +571,7 @@ void flush_icache_range(unsigned long start, unsigned long end)
};
on_each_cpu(ipi_flush_icache_range, &fd, 1);
}
EXPORT_SYMBOL(flush_icache_range);
/* ------------------------------------------------------------------------- */

5
arch/xtensa/kernel/traps.c
View File

@ -101,9 +101,8 @@ static dispatch_init_table_t __initdata dispatch_init_table[] = {
#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION
#ifdef CONFIG_XTENSA_UNALIGNED_USER
{ EXCCAUSE_UNALIGNED, USER, fast_unaligned },
#else
{ EXCCAUSE_UNALIGNED, 0, do_unaligned_user },
#endif
{ EXCCAUSE_UNALIGNED, 0, do_unaligned_user },
{ EXCCAUSE_UNALIGNED, KRNL, fast_unaligned },
#endif
#ifdef CONFIG_MMU
@ -264,7 +263,6 @@ do_illegal_instruction(struct pt_regs *regs)
*/
#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION
#ifndef CONFIG_XTENSA_UNALIGNED_USER
void
do_unaligned_user (struct pt_regs *regs)
{
@ -286,7 +284,6 @@ do_unaligned_user (struct pt_regs *regs)
}
#endif
#endif
void
do_debug(struct pt_regs *regs)

8
arch/xtensa/kernel/vectors.S
View File

@ -454,8 +454,14 @@ _DoubleExceptionVector_WindowOverflow:
s32i a0, a2, PT_DEPC
_DoubleExceptionVector_handle_exception:
addi a0, a0, -EXCCAUSE_UNALIGNED
beqz a0, 2f
addx4 a0, a0, a3
l32i a0, a0, EXC_TABLE_FAST_USER
l32i a0, a0, EXC_TABLE_FAST_USER + 4 * EXCCAUSE_UNALIGNED
xsr a3, excsave1
jx a0
2:
movi a0, user_exception
xsr a3, excsave1
jx a0

4
arch/xtensa/kernel/vmlinux.lds.S
View File

@ -269,13 +269,13 @@ SECTIONS
.UserExceptionVector.literal)
SECTION_VECTOR (_DoubleExceptionVector_literal,
.DoubleExceptionVector.literal,
DOUBLEEXC_VECTOR_VADDR - 40,
DOUBLEEXC_VECTOR_VADDR - 48,
SIZEOF(.UserExceptionVector.text),
.UserExceptionVector.text)
SECTION_VECTOR (_DoubleExceptionVector_text,
.DoubleExceptionVector.text,
DOUBLEEXC_VECTOR_VADDR,
40,
48,
.DoubleExceptionVector.literal)
. = (LOADADDR( .DoubleExceptionVector.text ) + SIZEOF( .DoubleExceptionVector.text ) + 3) & ~ 3;

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