| From | Thomas Gleixner <> | Subject | Re: [PATCHv6 01/30] x86/tdx: Detect running as a TDX guest in early boot | Date | Thu, 17 Mar 2022 00:10:02 +0100 |
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On Wed, Mar 16 2022 at 05:08, Kirill A. Shutemov wrote: > From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> > > In preparation of extending cc_platform_has() API to support TDX guest, > use CPUID instruction to detect support for TDX guests in the early > boot code (via tdx_early_init()). Since copy_bootdata() is the first > user of cc_platform_has() API, detect the TDX guest status before it. > > Define a synthetic feature flag (X86_FEATURE_TDX_GUEST) and set this > bit in a valid TDX guest platform. > > Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> > Reviewed-by: Andi Kleen <ak@linux.intel.com> > Reviewed-by: Tony Luck <tony.luck@intel.com> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> > Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> > Reviewed-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
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