Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
KVM: SVM: Check for an unexpected VM-Exit after RETPOLINE "fast" handling
Check for an unexpected/unhandled VM-Exit after the manual RETPOLINE=y
handling. The entire point of the RETPOLINE checks is to optimize for
common VM-Exits, i.e. checking for the rare case of an unsupported
VM-Exit is counter-productive. This also aligns SVM and VMX exit handling.
No functional change intended.
Reviewed-by: Yosry Ahmed <yosry.ahmed@linux.dev>
Link: https://patch.msgid.link/20251230211347.4099600-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
+6
-6
+6
-6
arch/x86/kvm/svm/svm.c
+6
-6
arch/x86/kvm/svm/svm.c
···
3469
3469
3470
3470
int svm_invoke_exit_handler(struct kvm_vcpu *vcpu, u64 exit_code)
3471
3471
{
3472
-
if (exit_code >= ARRAY_SIZE(svm_exit_handlers))
3473
-
goto unexpected_vmexit;
3474
-
3475
-
if (!svm_exit_handlers[exit_code])
3476
-
goto unexpected_vmexit;
3477
-
3478
3472
#ifdef CONFIG_MITIGATION_RETPOLINE
3479
3473
if (exit_code == SVM_EXIT_MSR)
3480
3474
return msr_interception(vcpu);
···
3485
3491
return sev_handle_vmgexit(vcpu);
3486
3492
#endif
3487
3493
#endif
3494
+
if (exit_code >= ARRAY_SIZE(svm_exit_handlers))
3495
+
goto unexpected_vmexit;
3496
+
3497
+
if (!svm_exit_handlers[exit_code])
3498
+
goto unexpected_vmexit;
3499
+
3488
3500
return svm_exit_handlers[exit_code](vcpu);
3489
3501
3490
3502
unexpected_vmexit: