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[v4,08/15] x86/tdx: Enable shared memory protected guest flags for TDX guest

Message ID 20210805005218.2912076-9-sathyanarayanan.kuppuswamy@linux.intel.com
State New
Headers show
Series Add TDX Guest Support (shared-mm support) | expand

Commit Message

Kuppuswamy Sathyanarayanan Aug. 5, 2021, 12:52 a.m. UTC 
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(+)
diff mbox series

Patch

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);
 	}