hypervisor: mshv: handle Special Debug Print VMG exit#7703
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rbradford merged 1 commit intocloud-hypervisor:mainfrom Feb 13, 2026
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hypervisor: mshv: handle Special Debug Print VMG exit#7703rbradford merged 1 commit intocloud-hypervisor:mainfrom
rbradford merged 1 commit intocloud-hypervisor:mainfrom
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Add handling for GHCB_INFO_SPECIAL_DBGPRINT VMG exit in the SEV-SNP guest exit handler. This exit occurs when the guest sends debug print requests through the GHCB interface. Without this handler, SEV-SNP guests fail to boot when debug output is triggered, such as when a debugger is attached to the guest image. The handler acknowledges the exit without printing to avoid performance degradation from frequent debug print requests. Signed-off-by: Muminul Islam <muislam@microsoft.com>
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Add handling for GHCB_INFO_SPECIAL_DBGPRINT VMG exit in the SEV-SNP guest exit handler. This exit occurs when the guest sends debug print requests through the GHCB interface.
Without this handler, SEV-SNP guests fail to boot when debug output is triggered, such as when a debugger is attached to the guest image.
The handler acknowledges the exit without printing to avoid performance degradation from frequent debug print requests.