KVM: nSVM: Do not report CLTS via SVM_EXIT_WRITE_CR0 to L1

CLTS only changes TS which is not monitored by selected CR0
interception. So skip any attempt to translate WRITE_CR0 to
CR0_SEL_WRITE for this instruction.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index b5e994ad0135..c79766e1f1e0 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -4205,7 +4205,8 @@ static int svm_check_intercept(struct kvm_vcpu *vcpu,
                 if (info->intercept == x86_intercept_cr_write)
                         icpt_info.exit_code += info->modrm_reg;
 
-                if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0)
+                if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
+                    info->intercept == x86_intercept_clts)
                         break;
 
                 intercept = svm->nested.intercept;