KVM: SVM: do nested vmexit in nested_svm_exit_handled

If this function returns true a nested vmexit is required. Move that
vmexit into the nested_svm_exit_handled function. This also simplifies
the handling of nested #pf intercepts in this function.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index bdd73fd..3bb6d4b 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1366,8 +1366,6 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
                svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
                if (nested_svm_exit_handled(svm, false)) {
                        nsvm_printk("VMexit -> EXCP 0x%x\n", nr);
-
-                       nested_svm_vmexit(svm);
                        return 1;
                }
        }
@@ -1388,7 +1386,6 @@ static inline int nested_svm_intr(struct vcpu_svm *svm)
 
                if (nested_svm_exit_handled(svm, false)) {
                        nsvm_printk("VMexit -> INTR\n");
-                       nested_svm_vmexit(svm);
                        return 1;
                }
        }
@@ -1497,15 +1494,7 @@ static int nested_svm_exit_handled_msr(struct vcpu_svm *svm,
 static int nested_svm_exit_handled(struct vcpu_svm *svm, bool kvm_override)
 {
        u32 exit_code = svm->vmcb->control.exit_code;
-
-       switch (svm->vmcb->control.exit_code) {
-       case SVM_EXIT_MSR:
-               return nested_svm_do(svm, svm->nested.vmcb,
-                                    svm->nested.vmcb_msrpm, NULL,
-                                    nested_svm_exit_handled_msr);
-       default:
-               break;
-       }
+       bool vmexit = false;
 
        if (kvm_override) {
                switch (exit_code) {
@@ -1528,45 +1517,55 @@ static int nested_svm_exit_handled(struct vcpu_svm *svm, bool kvm_override)
        }
 
        switch (exit_code) {
+       case SVM_EXIT_MSR:
+               if (nested_svm_do(svm, svm->nested.vmcb, svm->nested.vmcb_msrpm,
+                                 NULL, nested_svm_exit_handled_msr))
+                       vmexit = true;
+               break;
        case SVM_EXIT_READ_CR0 ... SVM_EXIT_READ_CR8: {
                u32 cr_bits = 1 << (exit_code - SVM_EXIT_READ_CR0);
                if (svm->nested.intercept_cr_read & cr_bits)
-                       return 1;
+                       vmexit = true;
                break;
        }
        case SVM_EXIT_WRITE_CR0 ... SVM_EXIT_WRITE_CR8: {
                u32 cr_bits = 1 << (exit_code - SVM_EXIT_WRITE_CR0);
                if (svm->nested.intercept_cr_write & cr_bits)
-                       return 1;
+                       vmexit = true;
                break;
        }
        case SVM_EXIT_READ_DR0 ... SVM_EXIT_READ_DR7: {
                u32 dr_bits = 1 << (exit_code - SVM_EXIT_READ_DR0);
                if (svm->nested.intercept_dr_read & dr_bits)
-                       return 1;
+                       vmexit = true;
                break;
        }
        case SVM_EXIT_WRITE_DR0 ... SVM_EXIT_WRITE_DR7: {
                u32 dr_bits = 1 << (exit_code - SVM_EXIT_WRITE_DR0);
                if (svm->nested.intercept_dr_write & dr_bits)
-                       return 1;
+                       vmexit = true;
                break;
        }
        case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
                u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
                if (svm->nested.intercept_exceptions & excp_bits)
-                       return 1;
+                       vmexit = true;
                break;
        }
        default: {
                u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
                nsvm_printk("exit code: 0x%x\n", exit_code);
                if (svm->nested.intercept & exit_bits)
-                       return 1;
+                       vmexit = true;
        }
        }
 
-       return 0;
+       if (vmexit) {
+               nsvm_printk("#VMEXIT reason=%04x\n", exit_code);
+               nested_svm_vmexit(svm);
+       }
+
+       return vmexit;
 }
 
 static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
@@ -2327,11 +2326,8 @@ static int handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
                nsvm_printk("nested handle_exit: 0x%x | 0x%lx | 0x%lx | 0x%lx\n",
                            exit_code, svm->vmcb->control.exit_info_1,
                            svm->vmcb->control.exit_info_2, svm->vmcb->save.rip);
-               if (nested_svm_exit_handled(svm, true)) {
-                       nested_svm_vmexit(svm);
-                       nsvm_printk("-> #VMEXIT\n");
+               if (nested_svm_exit_handled(svm, true))
                        return 1;
-               }
        }
 
        svm_complete_interrupts(svm);