diff options
| author |   Paolo Bonzini <pbonzini@redhat.com> | 2025-01-20 06:36:55 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2025-01-20 06:36:55 -0500 |
| commit | cae083c4e7ce2123fa173d3551b3f6468d6d6f9c (patch) | |
| tree | bd2e528230293d598ecf89f2dae6c886e78a39d0 | |
| parent | Merge tag 'kvm-x86-vcpu_array-6.14' of https://github.com/kvm-x86/linux into HEAD (diff) | |
| parent | KVM/x86: add comment to kvm_mmu_do_page_fault() (diff) | |
| download | wireguard-linux-cae083c4e7ce2123fa173d3551b3f6468d6d6f9c.tar.xz wireguard-linux-cae083c4e7ce2123fa173d3551b3f6468d6d6f9c.zip | |
Merge tag 'kvm-x86-mmu-6.14' of https://github.com/kvm-x86/linux into HEAD
KVM x86 MMU changes for 6.14:
- Add a comment to kvm_mmu_do_page_fault() to explain why KVM performs a
direct call to kvm_tdp_page_fault() when RETPOLINE is enabled.
| -rw-r--r-- | arch/x86/kvm/mmu/mmu_internal.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h index b00abbe3f6cf..72de71f4bc8b 100644 --- a/arch/x86/kvm/mmu/mmu_internal.h +++ b/arch/x86/kvm/mmu/mmu_internal.h @@ -321,6 +321,10 @@ static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, fault.slot = kvm_vcpu_gfn_to_memslot(vcpu, fault.gfn); } + /* + * With retpoline being active an indirect call is rather expensive, + * so do a direct call in the most common case. + */ if (IS_ENABLED(CONFIG_MITIGATION_RETPOLINE) && fault.is_tdp) r = kvm_tdp_page_fault(vcpu, &fault); else |