linux

iv/linux

History

Ganapatrao Kulkarni 78a19cfdf3 arm64: perf: Ignore exclude_hv when kernel is running in HYP

commit d98ecdaca296 ("arm64: perf: Count EL2 events if the kernel is
running in HYP") returns -EINVAL when perf system call perf_event_open is
called with exclude_hv != exclude_kernel. This change breaks applications
on VHE enabled ARMv8.1 platforms. The issue was observed with HHVM
application, which calls perf_event_open with exclude_hv = 1 and
exclude_kernel = 0.

There is no separate hypervisor privilege level when VHE is enabled, the
host kernel runs at EL2. So when VHE is enabled, we should ignore
exclude_hv from the application. This behaviour is consistent with PowerPC
where the exclude_hv is ignored when the hypervisor is not present and with
x86 where this flag is ignored.

Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
[will: added comment to justify the behaviour of exclude_hv]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

2017-05-15 18:30:37 +01:00

boot

TEE driver infrastructure and OP-TEE drivers

2017-05-10 11:20:09 -07:00

configs

ARM: SoC 64-bit changes

2017-05-09 10:04:17 -07:00

crypto

Revert "crypto: arm64/sha - Add constant operand modifier to ASM_EXPORT"

2017-04-24 16:09:50 +08:00

include

arm64: Remove redundant mov from LL/SC cmpxchg