| Message ID | 20210805005218.2912076-9-sathyanarayanan.kuppuswamy@linux.intel.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | Add TDX Guest Support (shared-mm support) | expand |
diff --git a/arch/x86/kernel/tdx.c b/arch/x86/kernel/tdx.c index 01b758496e84..1cf2443edb90 100644 --- a/arch/x86/kernel/tdx.c +++ b/arch/x86/kernel/tdx.c @@ -78,6 +78,8 @@ bool tdx_prot_guest_has(unsigned long flag) switch (flag) { case PATTR_GUEST_TDX: case PATTR_GUEST_UNROLL_STRING_IO: + case PATTR_GUEST_MEM_ENCRYPT: + case PATTR_GUEST_SHARED_MAPPING_INIT: return cpu_feature_enabled(X86_FEATURE_TDX_GUEST); }
In TDX guest, since the memory is private to guest, it needs some extra configuration before sharing any data with VMM. AMD SEV also implements similar features and hence code can be shared. Currently memory sharing related code in the kernel is protected by PATTR_GUEST_MEM_ENCRYPT and PATTR_GUEST_SHARED_MAPPING_INIT flags. So enable them for TDX guest as well. Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> --- arch/x86/kernel/tdx.c | 2 ++ 1 file changed, 2 insertions(+)