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Lack of CPPC V2 capability in _OSC of DSDT for ACRN guest. #8691

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yison opened this issue Aug 14, 2024 · 1 comment
Open

Lack of CPPC V2 capability in _OSC of DSDT for ACRN guest. #8691

yison opened this issue Aug 14, 2024 · 1 comment
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yison commented Aug 14, 2024 •
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After upgrading to guest kernel 6.1.80, there's no /sys/devices/system/cpu/cpu0/acpi_cppc on the guest. In guest kernel 6.1.80, it checks the CPPC V2 capability in _OSC of DSDT. This will result in performance issue on guest if lack of CPPC V2 capability in _OSC of DSDT for ACRN guest.
@yison yison added the status: new The issue status: new for creation label Aug 14, 2024
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yison commented Aug 14, 2024

[External_System_ID] ACRN-10969

yison added a commit to yison/acrn-hypervisor that referenced this issue Aug 14, 2024
@yison
dm: acpi: support CPPC V2 capability in _OSC of DSDT for ACRN guest.
633531d 
After upgrading to guest kernel 6.1.80, it checks the CPPC V2 capability
in _OSC of DSDT. To support it for ACRN guest, add CPPC V2 capability in
_OSC of DSDT. Currently we only support CPPC V2 capability in _OSC of
DSDT.

Tracked-On: projectacrn#8691
Signed-off-by: Yuan Lu <yuan.y.lu@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
@yison yison mentioned this issue Aug 14, 2024
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acrnsi-robot pushed a commit that referenced this issue Aug 15, 2024
@yison @acrnsi-robot
dm: acpi: support CPPC V2 capability in _OSC of DSDT for ACRN guest.
88cf122 
After upgrading to guest kernel 6.1.80, it checks the CPPC V2 capability
in _OSC of DSDT. To support it for ACRN guest, add CPPC V2 capability in
_OSC of DSDT. Currently we only support CPPC V2 capability in _OSC of
DSDT.

Tracked-On: #8691
Signed-off-by: Yuan Lu <yuan.y.lu@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
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