[edk2-devel] [PATCH RESEND 3/4] OvmfPkg/CcExitLib: Fix SEV-SNP XSave area size calculation

[Gerd Hoffmann]

On Wed, Mar 15, 2023 at 04:57:46PM -0500, Michael Roth wrote:
> CPUID leaf 0xD sub-leafs 0x0 and 0x1 contain cumulative sizes for the
> enabled XSave areas. Those sizes are calculated by tallying up all the
> other sub-leafs that contain per-area size information for XSave areas
> that are currently enabled in XCr0/XSS. The current check has the logic
> inverted. Fix that.
> 
> This doesn't seem to cause problems currently, but could in the future
> if OVMF made more extensive use of XSave areas. It was noticed while
> implementing SNP-related tests for KVM Unit Tests, which re-uses the
> OVMF #VC handler in some cases.

Acked-by: Gerd Hoffmann <kraxel at redhat.com>



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