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2d888f48e0
linux/arch/arm64/include/asm
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Suzuki K. Poulose 2d888f48e0 arm64: Emulate SETEND for AArch32 tasks 
Emulate deprecated 'setend' instruction for AArch32 bit tasks.

	setend [le/be] - Sets the endianness of EL0

On systems with CPUs which support mixed endian at EL0, the hardware
support for the instruction can be enabled by setting the SCTLR_EL1.SED
bit. Like the other emulated instructions it is controlled by an entry in
/proc/sys/abi/. For more information see :
	Documentation/arm64/legacy_instructions.txt

The instruction is emulated by setting/clearing the SPSR_EL1.E bit, which
will be reflected in the PSTATE.E in AArch32 context.

This patch also restores the native endianness for the execution of signal
handlers, since the process could have changed the endianness.

Note: All CPUs on the system must have mixed endian support at EL0. Once the
handler is registered, hotplugging a CPU which doesn't support mixed endian,
could lead to unexpected results/behavior in applications.

Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-01-23 17:11:44 +00:00
..
xen xen/arm/arm64: merge xen/mm32.c into xen/mm.c 2014-12-04 12:41:53 +00:00
alternative-asm.h arm64: add Cortex-A53 cache errata workaround 2014-11-25 15:56:21 +00:00
alternative.h arm64: add module support for alternatives fixups 2014-12-04 10:28:24 +00:00
arch_timer.h arm64: fix missing linux/bug.h include in asm/arch_timer.h 2015-01-07 11:40:59 +00:00
asm-offsets.h
assembler.h arm64: debug: avoid accessing mdscr_el1 on fault paths where possible 2014-05-12 16:43:28 +01:00
atomic.h locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read() 2014-10-03 06:06:23 +02:00
barrier.h arch: Add lightweight memory barriers dma_rmb() and dma_wmb() 2014-12-11 21:15:06 -05:00
bitops.h arch,arm64: Convert smp_mb__*() 2014-04-18 11:40:33 +02:00
cache.h arm64: Implement support for read-mostly sections 2014-12-03 10:19:35 +00:00
cacheflush.h arm64: add better page protections to arm64 2015-01-22 14:54:29 +00:00
cachetype.h arm64: kernel: add support for cpu cache information 2015-01-15 11:55:07 +00:00
cmpxchg.h arm64: percpu: Implement this_cpu operations 2014-11-20 12:05:18 +00:00
compat.h arm64: add SIGSYS siginfo for compat task 2014-11-28 10:24:59 +00:00
compiler.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
cpu_ops.h arm64: Remove unneeded extern keyword 2014-10-03 14:51:02 +01:00
cpu.h arm64: sanity checks: add missing AArch32 registers 2015-01-07 11:40:58 +00:00
cpufeature.h arm64: Track system support for mixed endian EL0 2015-01-23 17:02:19 +00:00
cpuidle.h arm64: kernel: introduce cpu_init_idle CPU operation 2014-09-12 10:48:55 +01:00
cputable.h arm64: CPU support 2012-09-17 13:41:59 +01:00
cputype.h arm64: Emulate SETEND for AArch32 tasks 2015-01-23 17:11:44 +00:00
debug-monitors.h arm64: Fix typos in KGDB macros 2014-09-25 15:35:41 +01:00
device.h arm64: introduce is_device_dma_coherent 2014-12-04 12:41:49 +00:00
dma-mapping.h arm64: Combine coherent and non-coherent swiotlb dma_ops 2015-01-23 16:43:55 +00:00
dmi.h arm64: dmi: Add SMBIOS/DMI support 2014-11-05 09:03:25 +01:00
efi.h arm64/efi: move virtmap init to early initcall 2015-01-22 14:59:25 +00:00
elf.h arm64: ASLR: Don't randomise text when randomise_va_space == 0 2014-10-24 15:47:49 +01:00
esr.h arm64: remove ESR_EL1_* macros 2015-01-15 12:24:34 +00:00
exception.h arm64: Use irqchip_init() for interrupt controller initialisation 2013-03-26 16:02:23 +00:00
exec.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
fb.h arm64: Device specific operations 2012-09-17 13:42:04 +01:00
fixmap.h arm64: use fixmap for text patching 2015-01-22 11:50:56 +00:00
fpsimd.h arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
fpsimdmacros.h arm64: fpsimd: avoid restoring fpcr if the contents haven't changed 2014-07-18 10:21:17 +01:00
ftrace.h arm64: ftrace: Add system call tracepoint 2014-05-29 09:08:33 +01:00
futex.h arm64: asm: remove redundant "cc" clobbers 2014-02-07 16:46:07 +00:00
hardirq.h arm64: Get rid of handle_IRQ 2014-09-03 13:11:00 +00:00
hugetlb.h ARM64: mm: HugeTLB support. 2013-06-14 09:52:40 +01:00
hw_breakpoint.h arm64: ptrace: fix compat hardware watchpoint reporting 2014-08-28 20:01:36 +01:00
hwcap.h arm64: Add COMPAT_HWCAP_LPAE 2014-11-17 10:43:42 +00:00
hypervisor.h arm64/xen: introduce asm/xen header files on arm64 2013-06-07 10:39:45 +00:00
insn.h arm64: Emulate CP15 Barrier instructions 2014-11-20 16:34:48 +00:00
io.h arm64: Fix overlapping VA allocations 2015-01-23 14:13:14 +00:00
irq_work.h arm64: Fix compilation error on UP builds 2014-10-21 17:01:07 +01:00
irq.h arm64/include/asm: Fixed a warning about 'struct pt_regs' 2014-12-04 10:10:59 +00:00
irqflags.h arm64: Add macros to manage processor debug state 2014-02-26 11:16:25 +00:00
jump_label.h arm64, jump label: optimize jump label implementation 2014-01-08 15:23:53 +00:00
Kbuild Merge branch 'irq-irqdomain-arm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-15 17:30:09 -08:00
kgdb.h arm64: Fix typos in KGDB macros 2014-09-25 15:35:41 +01:00
kvm_arm.h arm64: kvm: remove ESR_EL2_* macros 2015-01-15 12:24:43 +00:00
kvm_asm.h arm64: KVM: add trap handlers for AArch32 debug registers 2014-07-11 04:57:45 -07:00
kvm_coproc.h arm64: KVM: common infrastructure for handling AArch32 CP14/CP15 2014-07-11 04:57:44 -07:00
kvm_emulate.h arm64: kvm: move to ESR_ELx macros 2015-01-15 12:24:25 +00:00
kvm_host.h arm/arm64: KVM: Turn off vcpus on PSCI shutdown/reboot 2014-12-13 14:15:27 +01:00
kvm_mmio.h arm64: KVM: MMIO access backend 2013-06-07 14:03:38 +01:00
kvm_mmu.h arm/arm64: KVM: Introduce stage2_unmap_vm 2014-12-13 14:15:27 +01:00
kvm_psci.h ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible 2014-04-30 04:18:57 -07:00
linkage.h arm64: fix alignment padding in assembly code 2012-10-20 11:12:01 +01:00
memblock.h arm64: MMU initialisation 2012-09-17 13:41:56 +01:00
memory.h arm64: Fix overlapping VA allocations 2015-01-23 14:13:14 +00:00
mmu_context.h arm64: mm: don't bother invalidating the icache in switch_mm 2013-06-07 18:00:11 +01:00
mmu.h arm64/efi: remove idmap manipulations from UEFI code 2015-01-12 16:29:32 +00:00
module.h arm64: Loadable modules 2012-09-17 13:42:19 +01:00
neon.h arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
opcodes.h arm64: Add AArch32 instruction set condition code checks 2014-11-20 16:33:45 +00:00
page.h arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
pci.h arm64: Add architectural support for PCI 2014-09-30 17:08:57 -06:00
percpu.h arm64: percpu: Implement this_cpu operations 2014-11-20 12:05:18 +00:00
perf_event.h arm64: perf: add guest vs host discrimination 2013-01-29 16:56:17 +00:00
pgalloc.h arm64: pgalloc: consistently use PGALLOC_GFP 2014-11-20 12:05:18 +00:00
pgtable-hwdef.h arm64: Remove asm/pgtable-*level-hwdef.h files 2014-07-23 15:27:51 +01:00
pgtable-types.h arm64: Remove asm/pgtable-*level-types.h files 2014-07-23 15:27:56 +01:00
pgtable.h arm64/mm: add create_pgd_mapping() to create private page tables 2015-01-12 08:16:52 +00:00
pmu.h arm64: Performance counters support 2012-09-17 13:42:17 +01:00
proc-fns.h arm64: convert part of soft_restart() to assembly 2014-09-08 14:39:18 +01:00
processor.h arm64: fix missing asm/pgtable-hwdef.h include in asm/processor.h 2015-01-07 11:40:58 +00:00
psci.h PSCI: Add initial support for PSCIv0.2 functions 2014-05-15 10:16:00 -04:00
ptrace.h arm64: Emulate SETEND for AArch32 tasks 2015-01-23 17:11:44 +00:00
seccomp.h arm64: add seccomp support 2014-11-28 10:24:59 +00:00
shmparam.h arm64: ELF definitions 2012-09-17 13:42:07 +01:00
signal32.h arm64: Use get_signal() signal_setup_done() 2014-08-06 12:56:16 +02:00
smp_plat.h arm64: kernel: build MPIDR_EL1 hash function data structure 2013-12-16 17:17:30 +00:00
smp.h arm64: Tell irq work about self IPI support 2014-09-13 18:46:13 +02:00
sparsemem.h arm64: mm: update max pa bits to 48 2014-08-19 20:23:02 +01:00
spinlock_types.h arm64: Fix the endianness of arch_spinlock_t 2013-10-25 16:10:22 +01:00
spinlock.h arm64/spinlock: Replace ACCESS_ONCE READ_ONCE 2014-12-18 09:54:40 +01:00
stackprotector.h arm64: Add CONFIG_CC_STACKPROTECTOR 2014-07-09 12:23:48 +01:00
stacktrace.h arm64: Exception handling 2012-09-17 10:24:46 +01:00
stat.h UAPI: (Scripted) Disintegrate arch/arm64/include/asm 2012-10-11 11:05:13 +01:00
string.h arm64: lib: Implement optimized string length routines 2014-05-23 15:17:12 +01:00
suspend.h arm64: kernel: refactor the CPU suspend API for retention states 2014-09-12 10:48:55 +01:00
sync_bitops.h arm64/xen: introduce asm/xen header files on arm64 2013-06-07 10:39:45 +00:00
syscall.h arm64: Add audit support 2014-07-10 11:06:00 +01:00
syscalls.h arm64: switch to generic sigaltstack 2013-02-14 09:17:29 -05:00
sysreg.h arm64: gicv3: Allow GICv3 compilation with older binutils 2014-07-25 13:12:15 +01:00
system_misc.h arm64: use common reboot infrastructure 2013-07-19 15:57:08 +01:00
thread_info.h arm64: LLVMLinux: Calculate current_thread_info from current_stack_pointer 2014-09-08 14:39:19 +01:00
timex.h arm64: kernel: compiling issue, need delete read_current_timer() 2013-06-10 17:58:20 +01:00
tlb.h mmu_gather: move minimal range calculations into generic code 2014-11-17 10:12:42 +00:00
tlbflush.h arm64: fix soft lockup due to large tlb flush range 2014-07-24 18:41:13 +01:00
topology.h arm64: sched: Remove unused mc_capable() and smt_capable() 2014-05-16 17:12:04 +01:00
traps.h arm64: Add support for hooks to handle undefined instructions 2014-11-20 16:33:43 +00:00
uaccess.h arm64: Fix __range_ok macro 2014-03-20 17:41:27 +00:00
ucontext.h arm64: fix padding computation in struct ucontext 2013-03-18 10:42:16 +00:00
unistd32.h arm64 updates for 3.19 2014-12-09 13:12:47 -08:00
unistd.h arm64: Correct __NR_compat_syscalls for bpf 2015-01-07 11:40:58 +00:00
vdso_datapage.h arm64: VDSO support 2012-09-17 13:42:09 +01:00
vdso.h arm64: VDSO support 2012-09-17 13:42:09 +01:00
virt.h arm64: KVM: remove __kvm_hyp_code_{start,end} from hyp.S 2014-07-11 04:57:35 -07:00
word-at-a-time.h arm64: dcache: select DCACHE_WORD_ACCESS for little-endian CPUs 2013-12-19 17:43:08 +00:00