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520ad98871
linux/arch/arm64/kernel
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Anshuman Khandual 520ad98871 arm64/cpufeatures: Factorize emulate_mrs() 
MRS emulation gets triggered with exception class (0x00 or 0x18) eventually
calling the function emulate_mrs() which fetches the user space instruction
and analyses it's encodings (OP0, OP1, OP2, CRN, CRM, RT). The kernel tries
to emulate the given instruction looking into the encoding details. Going
forward these encodings can also be parsed from ESR_ELx.ISS fields without
requiring to fetch/decode faulting userspace instruction which can improve
performance. This factorizes emulate_mrs() function in a way that it can be
called directly with MRS encodings (OP0, OP1, OP2, CRN, CRM) for any given
target register which can then be used directly from 0x18 exception class.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-09-21 11:05:58 +01:00
..
probes kprobes/arm64: Fix %p uses in error messages 2018-06-21 17:33:42 +02:00
vdso arm64: Add build salt to the vDSO 2018-07-18 01:18:05 +09:00
.gitignore
acpi_numa.c arm64: numa: rework ACPI NUMA initialization 2018-07-09 18:21:40 +01:00
acpi_parking_protocol.c arm64: fix endianness annotation in acpi_parking_protocol.c 2017-06-29 11:33:15 +01:00
acpi.c arm64: acpi: fix alignment fault in accessing ACPI 2018-07-23 15:34:12 +01:00
alternative.c arm64: alternative: Use true and false for boolean values 2018-08-08 11:20:54 +01:00
arm64ksyms.c arm64: export tishift functions to modules 2018-05-21 19:00:48 +01:00
armv8_deprecated.c arm64: kill config_sctlr_el1() 2018-07-12 14:40:38 +01:00
asm-offsets.c arm64: KVM: Handle guest's ARCH_WORKAROUND_2 requests 2018-05-31 18:00:57 +01:00
cacheinfo.c arm64: Add support for ACPI based firmware tables 2018-05-17 17:28:09 +01:00
cpu_errata.c arm64: cpu_errata: Remove ARM64_MISMATCHED_CACHE_LINE_SIZE 2018-09-19 18:21:49 +01:00
cpu_ops.c arm64: cpu_ops: Add missing 'const' qualifiers 2017-12-01 13:05:08 +00:00
cpu-reset.h arm64: kexec: always reset to EL2 if present 2018-07-04 18:34:24 +01:00
cpu-reset.S arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives 2018-02-06 22:53:27 +00:00
cpufeature.c arm64/cpufeatures: Factorize emulate_mrs() 2018-09-21 11:05:58 +01:00
cpuidle.c ARM64 / cpuidle: Use new cpuidle macro for entering retention state 2018-01-02 13:50:34 +00:00
cpuinfo.c arm64: cpufeature: Detect SSBS and advertise to userspace 2018-09-14 17:46:01 +01:00
crash_dump.c arm64: kdump: provide /proc/vmcore file 2017-04-05 18:31:38 +01:00
debug-monitors.c arm64: Use arm64_force_sig_info instead of force_sig_info 2018-03-06 18:52:32 +00:00
efi-entry.S arm64: Add software workaround for Falkor erratum 1041 2018-02-06 22:53:13 +00:00
efi-header.S arm64: efi: split Image code and data into separate PE/COFF sections 2017-04-04 17:50:59 +01:00
efi-rt-wrapper.S efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
efi.c efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
entry-fpsimd.S arm64/sve: Write ZCR_EL1 on context switch only if changed 2018-05-17 18:19:53 +01:00
entry-ftrace.S arm64: Fix static use of function graph 2017-11-03 12:05:23 +00:00
entry.S arm64: entry: Allow handling of undefined instructions from EL1 2018-09-14 17:46:17 +01:00
fpsimd.c arm64: move sve_user_{enable,disable} to <asm/fpsimd.h> 2018-07-12 14:40:39 +01:00
ftrace.c arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
head.S arm64/kvm: Prohibit guest LOR accesses 2018-02-26 10:48:01 +01:00
hibernate-asm.S arm64: assembler: Change order of macro arguments in phys_to_ttbr 2018-02-06 22:53:21 +00:00
hibernate.c arm64: ssbd: Restore mitigation status on CPU resume 2018-05-31 17:35:19 +01:00
hw_breakpoint.c perf/arch/arm64: Implement hw_breakpoint_arch_parse() 2018-06-26 09:07:56 +02:00
hyp-stub.S arm64: hyp-stub: Zero x0 on successful stub handling 2017-04-09 07:49:35 -07:00
image.h arm64/efi: Make strrchr() available to the EFI namespace 2018-03-05 13:45:38 -06:00
insn.c arm64: insn: Don't fallback on nosync path for general insn patching 2018-07-05 17:24:48 +01:00
io.c arm64: Avoid aligning normal memory pointers in __memcpy_{to,from}io 2017-10-24 16:23:07 +01:00
irq.c arm64: Use the new GENERIC_IRQ_MULTI_HANDLER 2018-08-03 12:14:09 +02:00
jump_label.c arm64: Avoid calling stop_machine() when patching jump labels 2018-08-17 10:26:44 +01:00
kaslr.c arm64/kernel: kaslr: reduce module randomization range to 4 GB 2018-03-08 13:49:26 +00:00
kgdb.c arm64/debug: Fix registers on sleeping tasks 2018-03-06 18:52:34 +00:00
kuser32.S
machine_kexec.c arm64: kexec: Add comment to explain use of __flush_icache_range() 2018-07-31 12:10:38 +01:00
Makefile arm64: convert compat wrappers to C 2018-07-12 14:49:48 +01:00
module-plts.c arm64/kernel: rename module_emit_adrp_veneer->module_emit_veneer_for_adrp 2018-04-24 19:07:35 +01:00
module.c arm64: Avoid flush_icache_range() in alternatives patching code 2018-06-27 18:21:53 +01:00
module.lds arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
paravirt.c
pci.c PCI: Add a generic weak pcibios_align_resource() 2017-08-02 14:53:16 -05:00
perf_callchain.c arm64: unwind: remove sp from struct stackframe 2017-08-09 14:10:29 +01:00
perf_event.c arm64: perf: Add cap_user_time aarch64 2018-07-31 10:14:00 +01:00
perf_regs.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
process.c arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 2018-09-14 17:46:19 +01:00
psci.c
ptrace.c arm64: Add stack information to on_accessible_stack 2018-07-26 11:36:07 +01:00
reloc_test_core.c arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
reloc_test_syms.S arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
relocate_kernel.S arm64: Add software workaround for Falkor erratum 1041 2018-02-06 22:53:13 +00:00
return_address.c arm64: unwind: remove sp from struct stackframe 2017-08-09 14:10:29 +01:00
sdei.c arm64: sdei: Mark sdei stack helper functions as static 2018-07-31 12:08:22 +01:00
setup.c arm64: export memblock_reserve()d regions via /proc/iomem 2018-07-23 15:30:32 +01:00
signal32.c arm64: use {COMPAT,}SYSCALL_DEFINE0 for sigreturn 2018-07-12 14:49:48 +01:00
signal.c arm64: use {COMPAT,}SYSCALL_DEFINE0 for sigreturn 2018-07-12 14:49:48 +01:00
sleep.S arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives 2018-02-06 22:53:27 +00:00
smccc-call.S
smp_spin_table.c
smp.c arm64: numa: rework ACPI NUMA initialization 2018-07-09 18:21:40 +01:00
ssbd.c arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 2018-09-14 17:46:19 +01:00
stacktrace.c arm64: Add stack information to on_accessible_stack 2018-07-26 11:36:07 +01:00
suspend.c arm64: mm: Support Common Not Private translations 2018-09-18 12:02:27 +01:00
sys32.c arm64: implement syscall wrappers 2018-07-12 14:49:48 +01:00
sys_compat.c signal: Ensure every siginfo we send has all bits initialized 2018-04-25 10:40:51 -05:00
sys.c arm64: implement syscall wrappers 2018-07-12 14:49:48 +01:00
syscall.c arm64: svc: Ensure hardirq tracing is updated before return 2018-07-30 17:43:39 +01:00
time.c arm64: fix unwind_frame() for filtered out fn for function graph tracing 2018-02-23 13:46:38 +00:00
topology.c arm64: topology: re-introduce numa mask check for scheduler MC selection 2018-07-06 13:18:18 +01:00
trace-events-emulation.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
traps.c arm64/cpufeatures: Introduce ESR_ELx_SYS64_ISS_RT() 2018-09-21 11:05:25 +01:00
vdso.c arm64/vdso: Support mremap() for vDSO 2017-08-09 12:16:28 +01:00
vmlinux.lds.S arm64: remove no-op macro VMLINUX_SYMBOL() 2018-05-15 18:14:24 +01:00