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i2som-imx-linux/arch/arm/include/asm
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Vincent Whitchurch e82dd54ec0 ARM: 8813/1: Make aligned 2-byte getuser()/putuser() atomic on ARMv6+ 
[ Upstream commit 344eb5539a ]

getuser() and putuser() (and there underscored variants) use two
strb[t]/ldrb[t] instructions when they are asked to get/put 16-bits.
This means that the read/write is not atomic even when performed to a
16-bit-aligned address.

This leads to problems with vhost: vhost uses __getuser() to read the
vring's 16-bit avail.index field, and if it happens to observe a partial
update of the index, wrong descriptors will be used which will lead to a
breakdown of the virtio communication.  A similar problem exists for
__putuser() which is used to write to the vring's used.index field.

The reason these functions use strb[t]/ldrb[t] is because strht/ldrht
instructions did not exist until ARMv6T2/ARMv7.  So we should be easily
able to fix this on ARMv7.  Also, since all ARMv6 processors also don't
actually use the unprivileged instructions anymore for uaccess (since
CONFIG_CPU_USE_DOMAINS is not used) we can easily fix them too.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-17 20:37:38 +01:00
..
hardware
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mach
ARM/PCI: Convert PCI scan API to pci_scan_root_bus_bridge()
2017-06-28 15:13:55 -05:00
xen
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
arch_gicv3.h
irqchip/gic-v3-its: Add VPE interrupt masking
2017-08-31 15:31:38 +01:00
arch_timer.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
arm-cci.h
…
asm-offsets.h
…
assembler.h
ARM: 8796/1: spectre-v1,v1.1: provide helpers for address sanitization
2019-02-20 10:20:46 +01:00
atomic.h
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auxvec.h
…
barrier.h
ARM: avoid Cortex-A9 livelock on tight dmb loops
2019-04-05 22:31:37 +02:00
bitops.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bitrev.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bL_switcher.h
…
bug.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bugs.h
ARM: bugs: hook processor bug checking into SMP and suspend paths
2018-10-18 09:16:26 +02:00
cache.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cacheflush.h
randstruct: opt-out externally exposed function pointer structs
2017-06-30 12:00:52 -07:00
cachetype.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
checksum.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
clocksource.h
…
cmpxchg.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compiler.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cp15.h
ARM: vdso: Remove dependency with the arch_timer driver internals
2019-05-31 06:47:18 -07:00
cpu.h
…
cpufeature.h
ARM: 8663/1: wire up HWCAP/HWCAP2 feature bits to the CPU modalias
2017-03-30 19:45:52 +01:00
cpuidle.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cputype.h
ARM: split out processor lookup
2019-02-20 10:20:46 +01:00
cti.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dcc.h
…
delay.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
device.h
ARM: dma-mapping: Don't tear down third-party mappings
2017-05-30 11:31:33 +02:00
div64.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dma-contiguous.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dma-iommu.h
kmemcheck: remove annotations
2018-02-22 15:42:23 +01:00
dma-mapping.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dma.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dmi.h
efi/arm: Enable DMI/SMBIOS
2017-06-05 17:50:44 +02:00
domain.h
…
ecard.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
edac.h
…
efi.h
efi/arm-stub: Correct FDT and initrd allocation rules for arm64
2017-04-05 12:27:23 +02:00
elf.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
entry-macro-multi.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exception.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fb.h
…
fiq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
firmware.h
…
fixmap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
flat.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
floppy.h
…
fncpy.h
…
fpstate.h
…
ftrace.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
futex.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
glue-cache.h
…
glue-df.h
…
glue-pf.h
…
glue-proc.h
…
glue.h
…
gpio.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hardirq.h
ARM: prevent tracing IPI_CPU_BACKTRACE
2019-06-15 11:54:51 +02:00
highmem.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hugetlb-3level.h
…
hugetlb.h
…
hw_breakpoint.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hw_irq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hwcap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hypervisor.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ide.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
idmap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
insn.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
io.h
ARM: Implement pci_remap_cfgspace() interface
2017-04-24 13:53:13 -05:00
irq_work.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq.h
ARM: 8824/1: fix a migrating irq bug when hotplug cpu
2019-03-23 14:35:14 +01:00
irqflags.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
jump_label.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Kbuild
ARM: 8715/1: add a private asm/unaligned.h
2017-10-24 10:33:23 +01:00
kexec.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kgdb.h
ARM: 8764/1: kgdb: fix NUMREGBYTES so that gdb_regs[] is the correct size
2018-07-03 11:24:51 +02:00
kmap_types.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kprobes.h
kprobes: move kprobe declarations to asm-generic/kprobes.h
2017-02-27 18:43:45 -08:00
kvm_arm.h
arm: KVM: Fix VTTBR_BADDR_MASK BUG_ON off-by-one
2017-12-14 09:53:00 +01:00
kvm_asm.h
ARM: KVM: invalidate BTB on guest exit for Cortex-A12/A17
2018-10-18 09:16:27 +02:00
kvm_coproc.h
KVM: arm: plug potential guest hardware debug leakage
2017-05-15 14:29:19 +02:00
kvm_emulate.h
KVM: arm/arm64: Fix guest external abort matching
2017-09-05 17:33:37 +02:00
kvm_host.h
ARM: KVM: report support for SMCCC_ARCH_WORKAROUND_1
2018-10-18 09:16:27 +02:00
kvm_hyp.h
ARM: KVM: move asmlinkage before type
2017-07-12 16:26:04 -07:00
kvm_mmio.h
…
kvm_mmu.h
ARM: spectre-v2: KVM: invalidate icache on guest exit for Brahma B15
2018-10-18 09:16:27 +02:00
limits.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
linkage.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mc146818rtc.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mcpm.h
…
mcs_spinlock.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
memblock.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
memory.h
ARM: 8648/2: nommu: display vectors base
2017-02-28 11:06:14 +00:00
mmu_context.h
sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>
2017-03-02 08:42:37 +01:00
mmu.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
module.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mpu.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mtd-xip.h
…
neon.h
…
nwflash.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
opcodes-sec.h
…
opcodes-virt.h
…
opcodes.h
…
outercache.h
…
page-nommu.h
ARM: 8684/1: NOMMU: Remove unused KTHREAD_SIZE definition
2017-06-27 14:58:10 +01:00
page.h
…
paravirt.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
patch.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pci.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
percpu.h
…
perf_event.h
…
pgalloc.h
kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK
2018-02-22 15:42:23 +01:00
pgtable-2level-hwdef.h
…
pgtable-2level-types.h
…
pgtable-2level.h
…
pgtable-3level-hwdef.h
…
pgtable-3level-types.h
…
pgtable-3level.h
…
pgtable-hwdef.h
…
pgtable-nommu.h
ARM: 8676/1: NOMMU: provide pgprot_device() macro
2017-06-05 10:29:40 +01:00
pgtable.h
arch, mm: convert all architectures to use 5level-fixup.h
2017-03-09 11:48:47 -08:00
probes.h
…
proc-fns.h
ARM: spectre-v2: per-CPU vtables to work around big.Little systems
2019-02-20 10:20:47 +01:00
processor.h
ARM: avoid Cortex-A9 livelock on tight dmb loops
2019-04-05 22:31:37 +02:00
procinfo.h
…
prom.h
…
psci.h
…
ptrace.h
linux/compiler.h: Split into compiler.h and compiler_types.h
2017-12-25 14:26:33 +01:00
sections.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
set_memory.h
treewide: move set_memory_* functions away from cacheflush.h
2017-05-08 17:15:13 -07:00
setup.h
…
shmparam.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
signal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
smp_plat.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
smp_scu.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
smp_twd.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
smp.h
…
sparsemem.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
spinlock_types.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
spinlock.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
stackprotector.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
stacktrace.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
stage2_pgtable.h
…
string.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
suspend.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
swab.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
switch_to.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sync_bitops.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
syscall.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
system_info.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
system_misc.h
ARM: spectre-v2: harden user aborts in kernel space
2018-10-18 09:16:26 +02:00
tcm.h
…
therm.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
thread_info.h
ARM: 8791/1: vfp: use __copy_to_user() when saving VFP state
2019-02-20 10:20:45 +01:00
thread_notify.h
…
timex.h
…
tlb.h
mm: fix MADV_[FREE|DONTNEED] TLB flush miss problem
2017-08-10 15:54:07 -07:00
tlbflush.h
sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>
2017-03-02 08:42:37 +01:00
tls.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
topology.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
traps.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trusted_foundations.h
treewide: remove redundant #include <linux/kconfig.h>
2016-10-11 15:06:33 -07:00
uaccess.h
ARM: 8813/1: Make aligned 2-byte getuser()/putuser() atomic on ARMv6+
2019-12-17 20:37:38 +01:00
ucontext.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
unaligned.h
ARM: 8715/1: add a private asm/unaligned.h
2017-10-24 10:33:23 +01:00
unified.h
…
unistd.h
ARM: wire up new pkey syscalls
2016-10-19 10:18:47 +01:00
unwind.h
…
uprobes.h
…
user.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
v7m.h
ARM: 8830/1: NOMMU: Toggle only bits in EXC_RETURN we are really care of
2019-04-05 22:31:37 +02:00
vdso_datapage.h
…
vdso.h
ARM: 8748/1: mm: Define vdso_start, vdso_end as array
2018-05-30 07:52:20 +02:00
vfp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vfpmacros.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vga.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
virt.h
ARM: hyp-stub/KVM: Kill __hyp_get_vectors
2017-04-09 07:49:34 -07:00
word-at-a-time.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xor.h
…