[PATCH v2 7/9] KVM: SVM: split svm_handle_invalid_exit

[Maxim Levitsky]

Split the check for having a vmexit handler to
svm_check_exit_valid, and make svm_handle_invalid_exit
only handle a vmexit that is already not valid.

Signed-off-by: Maxim Levitsky <mlevi...@redhat.com>
---
 arch/x86/kvm/svm/svm.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 271196400495..2aa951bc470c 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3220,12 +3220,14 @@ static void dump_vmcb(struct kvm_vcpu *vcpu)
               "excp_to:", save->last_excp_to);
 }
 
-static int svm_handle_invalid_exit(struct kvm_vcpu *vcpu, u64 exit_code)
+static bool svm_check_exit_valid(struct kvm_vcpu *vcpu, u64 exit_code)
 {
-       if (exit_code < ARRAY_SIZE(svm_exit_handlers) &&
-           svm_exit_handlers[exit_code])
-               return 0;
+       return (exit_code < ARRAY_SIZE(svm_exit_handlers) &&
+               svm_exit_handlers[exit_code]);
+}
 
+static int svm_handle_invalid_exit(struct kvm_vcpu *vcpu, u64 exit_code)
+{
        vcpu_unimpl(vcpu, "svm: unexpected exit reason 0x%llx\n", exit_code);
        dump_vmcb(vcpu);
        vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
@@ -3233,14 +3235,13 @@ static int svm_handle_invalid_exit(struct kvm_vcpu 
*vcpu, u64 exit_code)
        vcpu->run->internal.ndata = 2;
        vcpu->run->internal.data[0] = exit_code;
        vcpu->run->internal.data[1] = vcpu->arch.last_vmentry_cpu;
-
-       return -EINVAL;
+       return 0;
 }
 
 int svm_invoke_exit_handler(struct kvm_vcpu *vcpu, u64 exit_code)
 {
-       if (svm_handle_invalid_exit(vcpu, exit_code))
-               return 0;
+       if (!svm_check_exit_valid(vcpu, exit_code))
+               return svm_handle_invalid_exit(vcpu, exit_code);
 
 #ifdef CONFIG_RETPOLINE
        if (exit_code == SVM_EXIT_MSR)
-- 
2.26.2