Replace a KVM_REQ_MMU_RELOAD request with a direct kvm_mmu_unload() call when the guest's CR4.PCIDE changes. This will allow tweaking the logic of KVM_REQ_MMU_RELOAD to free only obsolete/invalid roots, which is the historical intent of KVM_REQ_MMU_RELOAD. The recent PCIDE behavior is the only user of KVM_REQ_MMU_RELOAD that doesn't mark affected roots as obsolete, needs to unconditionally unload the entire MMU, _and_ affects only the current vCPU. Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> --- arch/x86/kvm/x86.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 2157284d05b0..579b26ffc124 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1077,7 +1077,7 @@ void kvm_post_set_cr4(struct kvm_vcpu *vcpu, unsigned long old_cr4, unsigned lon */ if (!tdp_enabled && (cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) - kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); + kvm_mmu_unload(vcpu); /* * The TLB has to be flushed for all PCIDs if any of the following -- 2.35.1.574.g5d30c73bfb-goog
