Messages in this thread Patch in this message |  | | From | "Kirill A. Shutemov" <> | | Subject | [PATCH] x86/sev: Fix SEV check in sev_map_percpu_data() | | Date | Tue, 2 Jan 2024 16:37:47 +0300 |
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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: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> --- arch/x86/kernel/kvm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 0ddb3bd0f1aa..5b495cfc79bc 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -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) { -- 2.41.0
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