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| author | Umesh Nerlige Ramappa <[email protected]> | 2022-11-10 17:19:12 +0000 |
|---|---|---|
| committer | Rodrigo Vivi <[email protected]> | 2022-11-23 11:46:31 -0500 |
| commit | 71b6b2557058d4374d11e792ec550a1a098fb7a9 (patch) | |
| tree | 0ab4c050108db2b02e7cd1ca1786a707fb394053 /lib/memory-notifier-error-inject.c | |
| parent | dfa5e6ef3ccefff9fa8a70d9f5fa6ef6244aa312 (diff) | |
i915/uncore: Acquire fw before loop in intel_uncore_read64_2x32
PMU reads the GT timestamp as a 2x32 mmio read and since upper and lower
32 bit registers are read in a loop, there is a latency involved between
getting the GT timestamp and the CPU timestamp. As part of the
resolution, refactor intel_uncore_read64_2x32 to acquire forcewake and
uncore lock prior to reading upper and lower regs.
Signed-off-by: Umesh Nerlige Ramappa <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]>
Reviewed-by: Ashutosh Dixit <[email protected]>
Signed-off-by: John Harrison <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit e746f84b8e813816951b63485134927ed6763a1b)
Signed-off-by: Rodrigo Vivi <[email protected]>
Diffstat (limited to 'lib/memory-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions