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| author | Sean Christopherson <seanjc@google.com> | 2022-01-28 03:51:55 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-02-10 21:47:19 +0300 |
| commit | 3d4421f8f26cbba0191cc0461399ec90284011a7 (patch) | |
| tree | 5caa159f7687c13bf1435a599e986d4c5bba61d3 /arch/x86/kvm/kvm_onhyperv.c | |
| parent | 0bcd556e15f97f5b6636f146acbf22663ab38ccf (diff) | |
| download | linux-3d4421f8f26cbba0191cc0461399ec90284011a7.tar.xz | |
KVM: x86: Uninline and export hv_track_root_tdp()
Uninline and export Hyper-V's hv_track_root_tdp(), which is (somewhat
indirectly) the last remaining reference to kvm_x86_ops from vendor
modules, i.e. will allow unexporting kvm_x86_ops. Reloading the TDP PGD
isn't the fastest of paths, hv_track_root_tdp() isn't exactly tiny, and
disallowing vendor code from accessing kvm_x86_ops provides nice-to-have
encapsulation of common x86 code (and of Hyper-V code for that matter).
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220128005208.4008533-10-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/kvm_onhyperv.c')
| -rw-r--r-- | arch/x86/kvm/kvm_onhyperv.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/kvm/kvm_onhyperv.c b/arch/x86/kvm/kvm_onhyperv.c index b469f45e3fe4..ee4f696a0782 100644 --- a/arch/x86/kvm/kvm_onhyperv.c +++ b/arch/x86/kvm/kvm_onhyperv.c @@ -92,3 +92,17 @@ int hv_remote_flush_tlb(struct kvm *kvm) return hv_remote_flush_tlb_with_range(kvm, NULL); } EXPORT_SYMBOL_GPL(hv_remote_flush_tlb); + +void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp) +{ + struct kvm_arch *kvm_arch = &vcpu->kvm->arch; + + if (kvm_x86_ops.tlb_remote_flush == hv_remote_flush_tlb) { + spin_lock(&kvm_arch->hv_root_tdp_lock); + vcpu->arch.hv_root_tdp = root_tdp; + if (root_tdp != kvm_arch->hv_root_tdp) + kvm_arch->hv_root_tdp = INVALID_PAGE; + spin_unlock(&kvm_arch->hv_root_tdp_lock); + } +} +EXPORT_SYMBOL_GPL(hv_track_root_tdp); |