Will Deacon 77ec462536 arm64: vdso: Avoid ISB after reading from cntvct_el0 ...

We can avoid the expensive ISB instruction after reading the counter in
the vDSO gettime functions by creating a fake address hazard against a
dummy stack read, just like we do inside the kernel.

Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lore.kernel.org/r/20210318170738.7756-5-will@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

2021-03-24 16:48:41 +00:00

..

clocksource.h

arm64: Introduce a way to disable the 32bit vdso

2020-07-08 21:57:51 +01:00

compat_barrier.h

arm64: vdso32: Detect binutils support for dmb ishld

2019-10-07 11:07:16 +01:00

compat_gettimeofday.h

vdso/treewide: Add vdso_data pointer argument to __arch_get_hw_counter()

2020-08-06 10:57:30 +02:00

gettimeofday.h

arm64: vdso: Avoid ISB after reading from cntvct_el0

2021-03-24 16:48:41 +00:00

processor.h

arm64: Introduce asm/vdso/processor.h

2020-03-21 15:24:01 +01:00

vsyscall.h

ARM/arm64: vdso: Use common vdso clock mode storage

2020-02-17 20:12:16 +01:00