This patch set is rebased for Peter's patch set to support
cap_user_time/cap_user_time_short ABI for Arm64, and export Arm arch
timer counter related parameters from kernel to Perf tool.
After get feedback from Ahmed, this patch set contains Ahmed's new patch
to refine sched clock data accessing with raw_read_seqcount_latch().
This patch set has been rebased on mainline kernel with the latest
commit 994e99a96c9b ("Merge tag 'platform-drivers-x86-v5.8-2' of
git://git.infradead.org/linux-platform-drivers-x86 into master"); it
has been verified with Perf tool for Arm SPE timestamp enabling.
Changes from v2:
- Included Ahmed's patch to use raw_read_seqcount_latch() for
sched_clock's seqcount latching;
- Changed to use mul_u64_u32_shr() for converting counter to ns
in Arm64's arch_perf_update_userpage() (PeterZ).
Ahmed S. Darwish (1):
time/sched_clock: Use raw_read_seqcount_latch()
Leo Yan (1):
tools headers UAPI: Update tools's copy of linux/perf_event.h
Peter Zijlstra (5):
sched_clock: Expose struct clock_read_data
arm64: perf: Implement correct cap_user_time
arm64: perf: Only advertise cap_user_time for arch_timer
perf: Add perf_event_mmap_page::cap_user_time_short ABI
arm64: perf: Add cap_user_time_short
arch/arm64/kernel/perf_event.c | 57 ++++++++++++++++++++-------
include/linux/sched_clock.h | 28 +++++++++++++
include/uapi/linux/perf_event.h | 23 +++++++++--
kernel/time/sched_clock.c | 41 ++++++-------------
tools/include/uapi/linux/perf_event.h | 23 +++++++++--
5 files changed, 124 insertions(+), 48 deletions(-)
--
2.17.1
