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-rw-r--r--arch/x86/kvm/emulate.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 9a144ca8e146..28b1a4e57827 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4222,6 +4222,11 @@ static int check_rdpmc(struct x86_emulate_ctxt *ctxt)
if (enable_vmware_backdoor && is_vmware_backdoor_pmc(rcx))
return X86EMUL_CONTINUE;
+ /*
+ * If CR4.PCE is set, the SDM requires CPL=0 or CR0.PE=0. The CR0.PE
+ * check however is unnecessary because CPL is always 0 outside
+ * protected mode.
+ */
if ((!(cr4 & X86_CR4_PCE) && ctxt->ops->cpl(ctxt)) ||
ctxt->ops->check_pmc(ctxt, rcx))
return emulate_gp(ctxt, 0);