On 4/22/2024 6:55 PM, Borislav Petkov wrote: > On Thu, Feb 15, 2024 at 05:01:21PM +0530, Nikunj A Dadhania wrote: >> Add support for the synthetic CPUID flag which indicates that the SNP >> guest is running with secure tsc enabled (MSR_AMD64_SEV Bit 11 - > > "TSC" Sure > >> SecureTsc_Enabled) . This flag is there so that this capability in the >> guests can be detected easily without reading MSRs every time accessors. > > Why? > > What's wrong with cc_platform_has(CC_ATTR_GUEST_SECURE_TSC) or so? > That was the initial implementation, and there were review comments[1] to use synthetic flag. Regards Nikunj 1. https://lore.kernel.org/lkml/20231106130041.gqoqszdxrmdomsxl@xxxxxxxxxxxxxxxxx/
