leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
60792ad349
linux/arch/arm64/kernel
History
Lorenzo Pieralisi 60792ad349 arm64: kernel: enforce pmuserenr_el0 initialization and restore 
The pmuserenr_el0 register value is architecturally UNKNOWN on reset.
Current kernel code resets that register value iff the core pmu device is
correctly probed in the kernel. On platforms with missing DT pmu nodes (or
disabled perf events in the kernel), the pmu is not probed, therefore the
pmuserenr_el0 register is not reset in the kernel, which means that its
value retains the reset value that is architecturally UNKNOWN (system
may run with eg pmuserenr_el0 == 0x1, which means that PMU counters access
is available at EL0, which must be disallowed).

This patch adds code that resets pmuserenr_el0 on cold boot and restores
it on core resume from shutdown, so that the pmuserenr_el0 setup is
always enforced in the kernel.

Cc: <stable@vger.kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-12-21 14:43:04 +00:00
..
vdso arm64: build vdso without libgcov 2015-11-12 15:18:07 +00:00
.gitignore arm64: Build infrastructure 2012-09-17 13:42:21 +01:00
acpi.c Power management and ACPI updates for v4.4-rc1 2015-11-04 18:10:13 -08:00
alternative.c arm64: alternatives: ensure secondary CPUs execute ISB after patching 2015-08-04 18:52:09 +01:00
arm64ksyms.c arm64: add KASAN support 2015-10-12 17:46:36 +01:00
armv8_deprecated.c arm64: compat: fix stxr failure case in SWP emulation 2015-10-28 17:06:35 +00:00
asm-offsets.c arm64: mm: rewrite ASID allocator and MM context-switching code 2015-10-07 11:55:41 +01:00
cacheinfo.c arm64: kernel: add support for cpu cache information 2015-01-15 11:55:07 +00:00
cpu_errata.c arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
cpu_ops.c arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
cpufeature.c arm64 fixes and clean-ups: 2015-11-12 15:33:11 -08:00
cpuidle.c arm64: cpuidle: add __init section marker to arm_cpuidle_init 2015-07-02 17:44:27 +01:00
cpuinfo.c arm64: Constify hwcap name string arrays 2015-10-21 15:36:00 +01:00
debug-monitors.c driver core update for 4.4-rc1 2015-11-04 21:50:37 -08:00
efi-entry.S arm64/efi: isolate EFI stub from the kernel proper 2015-10-12 16:20:12 +01:00
efi.c arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
entry32.S arm64: entry32: remove pointless register assignment 2015-07-10 16:47:13 +01:00
entry-fpsimd.S arm64: fpsimd: fix a typo in fpsimd_save_partial_state ENDPROC 2014-07-31 11:42:42 +01:00
entry-ftrace.S arm64: ftrace: fix function_graph tracer panic 2015-10-02 11:12:56 +01:00
entry.S arm64: AArch32 user space PC alignment exception 2015-10-16 14:55:49 +01:00
fpsimd.c arm64: Move FP/ASIMD hwcap handling to common code 2015-10-21 15:35:59 +01:00
ftrace.c arm64: ftrace: fix ftrace_modify_graph_caller for branch replace 2015-02-23 09:13:45 +00:00
head.S arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
hw_breakpoint.c arm64: Fix missing #include in hw_breakpoint.c 2015-10-12 12:10:53 +01:00
hyp-stub.S irqchip: gic-v3: Initial support for GICv3 2014-07-08 22:11:47 +00:00
image.h arm64: Add page size to the kernel image header 2015-10-19 17:54:41 +01:00
insn.c arm64: convert patch_lock to raw lock 2015-10-05 18:30:29 +01:00
io.c arm64: optimize memcpy_{from,to}io() and memset_io() 2014-11-06 17:25:27 +00:00
irq.c arm64: fix a migrating irq bug when hotplug cpu 2015-10-09 17:40:35 +01:00
jump_label.c jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP} 2015-08-03 11:34:12 +02:00
kgdb.c arm64/debug: Simplify BRK insn opcode declarations 2015-07-27 11:08:42 +01:00
kuser32.S arm64: Add __NR_* definitions for compat syscalls 2014-07-10 11:02:40 +01:00
Makefile arm64/efi: move arm64 specific stub C code to libstub 2015-10-30 16:02:52 +00:00
module.c arm64: add KASAN support 2015-10-12 17:46:36 +01:00
pci.c ARM64: PCI: do not enable resources on PROBE_ONLY systems 2015-07-30 20:17:07 +01:00
perf_callchain.c arm64: perf: factor out callchain code 2015-07-27 11:08:39 +01:00
perf_event.c arm64: kernel: enforce pmuserenr_el0 initialization and restore 2015-12-21 14:43:04 +00:00
perf_regs.c perf: Move task_pt_regs sampling into arch code 2015-01-09 11:12:28 +01:00
process.c arm64: add cpu_idle tracepoints to arch_cpu_idle 2015-10-19 18:43:41 +01:00
psci-call.S arm64: psci: move psci firmware calls out of line 2015-02-26 18:23:53 +00:00
psci.c drivers: firmware: psci: move power_state handling to generic code 2015-10-02 14:35:16 +01:00
ptrace.c arm64: Better native ptrace support for compat tasks 2015-07-27 11:08:39 +01:00
return_address.c arm64: LLVMLinux: Use global stack pointer in return_address() 2014-09-08 14:39:19 +01:00
setup.c arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
signal32.c arm64: compat: fix vfp save/restore across signal handlers in big-endian 2015-09-17 11:57:03 +01:00
signal.c arm64: Removed unused variable 2015-04-13 20:40:10 +02:00
sleep.S arm64: mm: ensure patched kernel text is fetched from PoU 2015-08-05 10:05:20 +01:00
smp_spin_table.c ARM64: kernel: make cpu_ops hooks DT agnostic 2015-05-19 16:09:29 +01:00
smp.c arm64: smp: make of_parse_and_init_cpus static 2015-11-12 15:18:14 +00:00
stacktrace.c Revert "ARM64: unwind: Fix PC calculation" 2015-10-28 17:07:07 +00:00
suspend.c arm64 fixes and clean-ups: 2015-11-12 15:33:11 -08:00
sys32.c arm64: fix implementation of mmap2 compat syscall 2015-03-19 10:43:51 +00:00
sys_compat.c arm64: compat: align cacheflush syscall with arch/arm 2014-12-01 13:31:12 +00:00
sys.c arm64: make sys_call_table const 2015-01-27 09:38:08 +00:00
time.c clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
topology.c arm64: kernel: remove non-legit DT warnings when booting using ACPI 2015-07-27 11:08:41 +01:00
trace-events-emulation.h arm64: Trace emulation of AArch32 legacy instructions 2014-11-20 16:35:02 +00:00
traps.c arm64: Synchronise dump_backtrace() with perf callchain 2015-10-19 18:51:52 +01:00
vdso.c arm64: VDSO: fix coarse clock monotonicity regression 2015-08-10 15:37:45 +01:00
vmlinux.lds.S arm64: page-align sections for DEBUG_RODATA 2015-10-29 17:23:39 +00:00