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| author | David Woodhouse <[email protected]> | 2023-10-27 18:36:51 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <[email protected]> | 2023-11-20 16:26:20 +0000 |
| commit | 9bb69ba4c177dccaa1f5b5cbdf80b67813328348 (patch) | |
| tree | 2966aa9d67a774d0dfe27c3fa142c53fc71b1dd0 /drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | |
| parent | Linux 6.7-rc2 (diff) | |
| download | kernel-9bb69ba4c177dccaa1f5b5cbdf80b67813328348.tar.gz kernel-9bb69ba4c177dccaa1f5b5cbdf80b67813328348.zip | |
ACPI: processor_idle: use raw_safe_halt() in acpi_idle_play_dead()
Xen HVM guests were observed taking triple-faults when attempting to
online a previously offlined vCPU.
Investigation showed that the fault was coming from a failing call
to lockdep_assert_irqs_disabled(), in load_current_idt() which was
too early in the CPU bringup to actually catch the exception and
report the failure cleanly.
This was a false positive, caused by acpi_idle_play_dead() setting
the per-cpu hardirqs_enabled flag by calling safe_halt(). Switch it
to use raw_safe_halt() instead, which doesn't do so.
Signed-off-by: David Woodhouse <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Cc: 6.6+ <[email protected]> # 6.6+
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
0 files changed, 0 insertions, 0 deletions