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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: 70210c044b ("KVM: VMX: Add SGX ENCLS[ECREATE] handler to enforce CPUID restrictions")
Cc: Binbin Wu <binbin.wu@linux.intel.com>
Cc: Kai Huang <kai.huang@intel.com>
Tested-by: Kai Huang <kai.huang@intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20230405234556.696927-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2023-04-05 16:45:55 -07:00
parent 331f229768
commit 5e50082c8c
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/vmx/sgx.c
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@ -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)