diff mbox

[RFC,v1,14/28] x86: Don't set the SME MSR bit when SEV is active

Message ID 147190838870.9523.7536164067495140361.stgit@brijesh-build-machine (mailing list archive)
State Not Applicable
Delegated to: Herbert Xu
Headers show

Commit Message

Brijesh Singh Aug. 22, 2016, 11:26 p.m. UTC 
From: Tom Lendacky <thomas.lendacky@amd.com>

When SEV is active the virtual machine cannot set the MSR for SME, so
don't set the trampoline flag for SME.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
 arch/x86/realmode/init.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


--
To unsubscribe from this list: send the line "unsubscribe linux-crypto" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c
index f3207e5..391d8ba 100644
--- a/arch/x86/realmode/init.c
+++ b/arch/x86/realmode/init.c
@@ -102,7 +102,7 @@  static void __init setup_real_mode(void)
 	*trampoline_cr4_features = mmu_cr4_features;
 
 	trampoline_header->flags = 0;
-	if (sme_me_mask)
+	if (sme_me_mask && !sev_active)
 		trampoline_header->flags |= TH_FLAGS_SME_ENABLE;
 
 	trampoline_pgd = (u64 *) __va(real_mode_header->trampoline_pgd);