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bc29b7ac1d
linux/arch/s390/include/asm
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Gerald Schaefer bc29b7ac1d s390/mm: clean up pte/pmd encoding 
The hugetlbfs pte<->pmd conversion functions currently assume that the pmd
bit layout is consistent with the pte layout, which is not really true.

The SW read and write bits are encoded as the sequence "wr" in a pte, but
in a pmd it is "rw". The hugetlbfs conversion assumes that the sequence
is identical in both cases, which results in swapped read and write bits
in the pmd. In practice this is not a problem, because those pmd bits are
only relevant for THP pmds and not for hugetlbfs pmds. The hugetlbfs code
works on (fake) ptes, and the converted pte bits are correct.

There is another variation in pte/pmd encoding which affects dirty
prot-none ptes/pmds. In this case, a pmd has both its HW read-only and
invalid bit set, while it is only the invalid bit for a pte. This also has
no effect in practice, but it should better be consistent.

This patch fixes both inconsistencies by changing the SW read/write bit
layout for pmds as well as the PAGE_NONE encoding for ptes. It also makes
the hugetlbfs conversion functions more robust by introducing a
move_set_bit() macro that uses the pte/pmd bit #defines instead of
constant shifts.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-07-31 05:27:57 -04:00
..
fpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-07-26 12:22:51 -07:00
trace s390/diag: add a s390 prefix to the diagnose trace point 2015-11-09 09:10:47 +01:00
airq.h s390/airq: add support for irq ranges 2014-03-04 10:41:04 +01:00
appldata.h s390/diag: add a statistic for diagnose calls 2015-10-14 14:32:06 +02:00
asm-offsets.h
atomic.h locking/atomic: Remove linux/atomic.h:atomic_fetch_or() 2016-06-16 10:48:32 +02:00
barrier.h s390: more efficient smp barriers 2016-01-12 20:47:05 +02:00
bitops.h s390/bitops: remove 31 bit related comments 2015-10-14 14:32:15 +02:00
bug.h
bugs.h
cache.h s390: use __section macro everywhere 2016-06-13 15:58:23 +02:00
cacheflush.h mm/debug_pagealloc: fix build failure on ppc and some other archs 2015-02-05 13:35:30 -08:00
ccwdev.h s390/cio: fix multiple structure definitions 2014-05-20 08:58:53 +02:00
ccwgroup.h s390: fix new ccwgroup.h kernel-doc warning 2014-05-20 08:58:45 +02:00
checksum.h ipv4: Update parameters for csum_tcpudp_magic to their original types 2016-03-13 23:55:13 -04:00
chpid.h s390/cio: fix multiple structure definitions 2014-05-20 08:58:53 +02:00
cio.h s390/time: STP sync clock correction 2016-06-13 15:58:19 +02:00
clp.h s390/pci: add ioctl interface for CLP 2016-03-07 16:54:32 +01:00
cmb.h s390/cio: use device_lock during cmb activation 2015-10-14 14:32:02 +02:00
cmpxchg.h s390/cmpxchg: remove dead code 2015-10-14 14:32:15 +02:00
compat.h s390: remove is_32bit_task() helper 2015-11-27 09:24:17 +01:00
cpacf.h s390/crypto: cleanup and move the header with the cpacf definitions 2016-04-15 18:16:40 +02:00
cpcmd.h
cpu_mf.h s390/cpumf: use basic block for ecctr inline assembly 2016-06-28 09:32:38 +02:00
cpu.h s390/smp: cleanup core vs. cpu in the SCLP interface 2015-06-25 09:39:24 +02:00
cpufeature.h s390/module: enable generic CPU feature modalias using s390 ELF hwcaps 2015-07-22 09:58:02 +02:00
cputime.h s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
crw.h s390/cio: Consolidate inline assemblies and related data definitions 2015-12-18 14:59:34 +01:00
css_chars.h s390/qdio: bridgeport support - CHSC part 2014-01-15 14:48:01 -08:00
ctl_reg.h s390/fpu: always enable the vector facility if it is available 2015-10-14 14:32:08 +02:00
current.h
debug.h s390/debug: avoid function call for debug_sprintf_* 2014-12-08 09:42:29 +01:00
delay.h
device.h s390/dma: Allow per device dma ops 2016-03-02 17:01:56 +02:00
diag.h s390: avoid extable collisions 2016-06-13 15:58:26 +02:00
dis.h s390/disassembler: add vector instructions 2014-10-09 09:14:15 +02:00
div64.h
dma-mapping.h s390/dma: Allow per device dma ops 2016-03-02 17:01:56 +02:00
dma.h
eadm.h s390/scm_block: do not hide eadm subchannel dependency 2013-11-15 14:08:42 +01:00
ebcdic.h
elf.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-01-13 13:16:16 -08:00
emergency-restart.h
exec.h
extmem.h
facilities_src.h s390/facilities: add z13 als bit 2015-12-18 14:59:24 +01:00
facility.h s390/facilities: optimize test_facility() 2015-12-18 14:59:23 +01:00
fb.h
fcx.h s390: use canonical include guard style 2016-06-13 15:58:17 +02:00
ftrace.h s390/dumpstack: implement and use return_address() 2016-05-04 16:29:45 +02:00
futex.h s390/uaccess: simplify control register updates 2014-05-20 08:58:46 +02:00
gmap.h s390/mm: split arch/s390/mm/pgtable.c 2016-03-08 15:00:15 +01:00
hardirq.h hardirq: Make hardirq bits generic 2013-11-13 20:21:46 +01:00
hugetlb.h s390/mm: add support for 2GB hugepages 2016-07-06 08:46:43 +02:00
hw_irq.h s390: convert interrupt handling to use generic hardirq 2013-08-22 12:20:04 +02:00
idals.h s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
idle.h s390/udelay: make udelay have busy loop semantics 2015-10-14 14:32:13 +02:00
io.h s390/io: Add pci_iomap_wc() and pci_iomap_wc_range() 2015-08-28 08:04:48 +02:00
ipl.h s390/ipl: rename diagnose enums 2016-06-13 15:58:26 +02:00
irq_regs.h
irq.h s390: use SPARSE_IRQ 2016-06-13 15:58:24 +02:00
irqflags.h s390/irqflags: optimize irq restore 2016-01-19 12:14:01 +01:00
isc.h
itcw.h
jump_label.h s390: add explicit <linux/stringify.h> for jump label 2016-06-13 15:58:16 +02:00
Kbuild Merge branch 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2015-10-04 16:31:13 +01:00
kdebug.h
kexec.h kexec: allocate the kexec control page with KEXEC_CONTROL_MEMORY_GFP 2015-04-23 16:52:01 +02:00
kmap_types.h
kprobes.h s390: stack address vs thread_info 2016-06-28 09:33:00 +02:00
kvm_host.h KVM: s390: Add stats for PEI events 2016-06-10 10:24:24 +02:00
kvm_para.h s390/diag: add a statistic for diagnose calls 2015-10-14 14:32:06 +02:00
linkage.h s390/kernel: move EX_TABLE macros to linkage.h header file 2015-07-22 09:57:59 +02:00
livepatch.h livepatch: reuse module loader code to write relocations 2016-04-01 15:00:11 +02:00
local64.h
local.h
lowcore.h s390: rename struct _lowcore to struct lowcore 2016-01-11 12:27:15 +01:00
mman.h s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
mmu_context.h s390/mm: simplify the TLB flushing code 2016-06-13 15:58:22 +02:00
mmu.h s390/mm: simplify the TLB flushing code 2016-06-13 15:58:22 +02:00
mmzone.h s390/numa: add core infrastructure 2015-08-03 18:40:25 +02:00
module.h
mutex.h mutex: replace CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX with simple ifdef 2013-09-28 12:46:21 +02:00
nmi.h s390/nmi: remove casts 2015-10-27 09:33:55 +01:00
numa.h s390/numa: use correct type for node_to_cpumask_map 2015-09-23 09:18:56 +02:00
os_info.h s390/dump: streamline oldmem copy functions 2015-11-27 09:24:12 +01:00
page.h s390/mm: add support for 2GB hugepages 2016-07-06 08:46:43 +02:00
pci_clp.h s390/pci: add ioctl interface for CLP 2016-03-07 16:54:32 +01:00
pci_debug.h s390/pci: remove CONFIG_PCI_DEBUG dependancy 2013-10-24 17:17:16 +02:00
pci_dma.h s390/pci_dma: fix DMA table corruption with > 4 TB main memory 2015-11-27 09:24:15 +01:00
pci_insn.h s390/pci: cleanup function information block 2013-10-24 17:17:17 +02:00
pci_io.h s390/pci: improve ZPCI_* macros 2016-01-26 12:45:49 +01:00
pci.h s390/pci: fmb enhancements 2016-04-15 18:16:40 +02:00
percpu.h s390/percpu: remove this_cpu_cmpxchg_double_4 2016-03-02 06:44:30 -06:00
perf_event.h s390/perf: remove perf_release/reserver_sampling functions 2016-06-28 09:32:25 +02:00
pgalloc.h s390/mm: fix asce_bits handling with dynamic pagetable levels 2016-04-21 09:50:09 +02:00
pgtable.h s390/mm: clean up pte/pmd encoding 2016-07-31 05:27:57 -04:00
processor.h s390/cpuinfo: show dynamic and static cpu mhz 2016-06-13 15:58:17 +02:00
ptrace.h s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
qdio.h s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
reset.h s390/dump: rework CPU register dump code 2015-11-27 09:24:14 +01:00
runtime_instr.h s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
rwsem.h locking/rwsem: Remove rwsem_atomic_add() and rwsem_atomic_update() 2016-06-08 15:16:59 +02:00
schid.h
sclp.h Small release overall. 2016-05-19 11:27:09 -07:00
scsw.h
seccomp.h s390/seccomp: include generic seccomp header file 2016-04-01 17:20:55 +02:00
sections.h s390: add proper __ro_after_init support 2016-06-13 15:58:23 +02:00
segment.h
serial.h s390: convert interrupt handling to use generic hardirq 2013-08-22 12:20:04 +02:00
setup.h s390/console: Make preferred console handling more consistent 2016-07-13 10:58:07 +02:00
shmparam.h
signal.h
sigp.h s390/smp: use basic blocks for sigp inline assemblies 2016-06-28 09:32:35 +02:00
smp.h s390/dump: rework CPU register dump code 2015-11-27 09:24:14 +01:00
sparsemem.h s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
spinlock_types.h s390/rwlock: use directed yield for write-locked rwlocks 2014-09-25 10:52:05 +02:00
spinlock.h locking/spinlock, arch: Update and fix spin_unlock_wait() implementations 2016-06-14 11:55:15 +02:00
stp.h s390/time: remove ETR support 2016-06-13 15:58:21 +02:00
string.h lib/string.c: remove strnicmp() 2015-02-12 18:54:14 -08:00
switch_to.h s390/fpu: split fpu-internal.h into fpu internals, api, and type headers 2015-10-16 09:41:12 +02:00
syscall.h s390/syscalls: simplify syscall_get_arch() 2015-03-30 13:26:07 +02:00
sysinfo.h s390/sysinfo: add missing SYSIB 1.2.2 multithreading fields 2016-01-11 12:27:00 +01:00
termios.h
thread_info.h s390: add missing declarations 2016-05-10 13:24:51 +02:00
timex.h s390/time: add leap seconds to initial system time 2016-06-13 15:58:20 +02:00
tlb.h mm/mmu_gather: track page size with mmu gather and force flush if page size change 2016-07-26 16:19:19 -07:00
tlbflush.h s390/mm: fix gmap tlb flush issues 2016-07-13 10:58:01 +02:00
topology.h s390/topology: add drawer scheduling domain level 2016-06-13 15:58:27 +02:00
types.h s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
uaccess.h s390/uaccess: fix __put_get_user_asm define 2016-06-28 09:32:27 +02:00
unaligned.h
unistd.h s390: wire up separate socketcalls system calls 2015-09-18 11:16:53 +02:00
uprobes.h s390/uprobes: architecture backend for uprobes 2014-09-25 10:52:17 +02:00
user.h
vdso.h s390/vdso: optimize getcpu system call 2016-01-11 13:01:24 +01:00
vga.h
vtime.h vtime: Describe overriden functions in dedicated arch headers 2013-08-14 17:14:53 +02:00
vtimer.h s390/idle: consolidate idle functions and definitions 2014-10-09 09:14:03 +02:00
vx-insn.h s390/vx: add vector instruction support for older binutils versions 2015-07-22 09:58:01 +02:00
xor.h s390/xor: optimized xor routing using the XC instruction 2016-02-23 08:56:17 +01:00