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ACPI PM register emulation is not working on QEMU #8771

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jiaqingz-intel opened this issue Apr 25, 2025 · 1 comment
Open

ACPI PM register emulation is not working on QEMU #8771

jiaqingz-intel opened this issue Apr 25, 2025 · 1 comment
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@jiaqingz-intel jiaqingz-intel added the status: new The issue status: new for creation label Apr 25, 2025
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[External_System_ID] ACRN-12151

jiaqingz-intel added a commit to jiaqingz-intel/acrn-hypervisor that referenced this issue Apr 25, 2025
@jiaqingz-intel
hv: pm: fix acpi register size calculation
e5c9a74 
The Access Size field in ACPI GAS was not introduced before ACPI 2.0,
Errata C. It is not guaranteed to be a non zero value, like QEMU
programs it to 0. As it only indicates how many bytes it can be
accessed at once, the register size should be determined by Bit Width
and Bit Offset. In IO space, Bit Offset is always 0, the size is
(Bit Width / 8).

Tracked-On: projectacrn#8771
Signed-off-by: Jiaqing Zhao <[email protected]>
Reviewed-by: Li Fei <[email protected]>
@jiaqingz-intel jiaqingz-intel mentioned this issue Apr 25, 2025
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