Commit a9ef2774 authored by Kiryl Shutsemau's avatar Kiryl Shutsemau Committed by Paolo Bonzini
Browse files

x86/kvm: Fix SEV check in sev_map_percpu_data() 



The function sev_map_percpu_data() checks if it is running on an SEV
platform by checking the CC_ATTR_GUEST_MEM_ENCRYPT attribute. However,
this attribute is also defined for TDX.

To avoid false positives, add a cc_vendor check.

Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Fixes: 4d96f910 ("x86/sev: Replace occurrences of sev_active() with cc_platform_has()")
Suggested-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Message-Id: <20240124130317.495519-1-kirill.shutemov@linux.intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent d52734d0

arch/x86/kernel/kvm.c

+2 −1
Original line number Diff line number Diff line
@@ -434,7 +434,8 @@ static void __init sev_map_percpu_data(void) 
{

	int cpu;



	if (!cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT))

	if (cc_vendor != CC_VENDOR_AMD ||

	    !cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT))

		return;



	for_each_possible_cpu(cpu) {