From 5e50082c8c21cd32ef21f523c149939668954ab6 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 5 Apr 2023 16:45:55 -0700 Subject: KVM: VMX: Inject #GP on ENCLS if vCPU has paging disabled (CR0.PG==0) Inject a #GP when emulating/forwarding a valid ENCLS leaf if the vCPU has paging disabled, e.g. if KVM is intercepting ECREATE to enforce additional restrictions. The pseudocode in the SDM lists all #GP triggers, including CR0.PG=0, as being checked after the ENLCS-exiting checks, i.e. the VM-Exit will occur before the CPU performs the CR0.PG check. Fixes: 70210c044b4e ("KVM: VMX: Add SGX ENCLS[ECREATE] handler to enforce CPUID restrictions") Cc: Binbin Wu Cc: Kai Huang Tested-by: Kai Huang Reviewed-by: Kai Huang Link: https://lore.kernel.org/r/20230405234556.696927-2-seanjc@google.com Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/sgx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx/sgx.c b/arch/x86/kvm/vmx/sgx.c index 2261b684a7d4..137088a663ff 100644 --- a/arch/x86/kvm/vmx/sgx.c +++ b/arch/x86/kvm/vmx/sgx.c @@ -382,7 +382,7 @@ int handle_encls(struct kvm_vcpu *vcpu) if (!encls_leaf_enabled_in_guest(vcpu, leaf)) { kvm_queue_exception(vcpu, UD_VECTOR); - } else if (!sgx_enabled_in_guest_bios(vcpu)) { + } else if (!sgx_enabled_in_guest_bios(vcpu) || !is_paging(vcpu)) { kvm_inject_gp(vcpu, 0); } else { if (leaf == ECREATE) -- cgit