From f74bb1d2eda1b77c37f35876ca0c44be345e2b1f Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Fri, 21 Nov 2025 14:34:42 -0800 Subject: [PATCH] KVM: nVMX: Precisely mark vAPIC and PID maps dirty when delivering nested PI Explicitly mark the vmcs12 vAPIC and PI descriptor pages as dirty when delivering a nested posted interrupt instead of marking all vmcs12 pages as dirty. This will allow marking the APIC access page (and any future vmcs12 pages) as dirty in nested_mark_vmcs12_pages_dirty() without over- dirtying in the nested PI case. Manually marking the vAPIC and PID pages as dirty also makes the flow a bit more self-documenting, e.g. it's not obvious at first glance that vmx->nested.pi_desc is actually a host kernel mapping of a vmcs12 page. No functional change intended. Link: https://patch.msgid.link/20251121223444.355422-4-seanjc@google.com Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/nested.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 72fcb1228af4d..f5ebd84a2f6be 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -4028,7 +4028,8 @@ static int vmx_complete_nested_posted_interrupt(struct kvm_vcpu *vcpu) } } - nested_mark_vmcs12_pages_dirty(vcpu); + kvm_vcpu_map_mark_dirty(vcpu, &vmx->nested.virtual_apic_map); + kvm_vcpu_map_mark_dirty(vcpu, &vmx->nested.pi_desc_map); return 0; mmio_needed: -- 2.47.3