From 75e68e607896c84310dee37c783c45220e56ce8c Mon Sep 17 00:00:00 2001 From: Izik Eidus Date: Sat, 12 Jan 2008 23:49:09 +0200 Subject: [PATCH] KVM: MMU: Fix dirty page setting for pages removed from rmap Right now rmap_remove won't set the page as dirty if the shadow pte pointed to this page had write access and then it became readonly. This patches fixes that, by setting the page as dirty for spte changes from write to readonly access. Signed-off-by: Izik Eidus Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index c478ee25de66..8efdcdbebb03 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -890,6 +890,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte, { u64 spte; int was_rmapped = is_rmap_pte(*shadow_pte); + int was_writeble = is_writeble_pte(*shadow_pte); pgprintk("%s: spte %llx access %x write_fault %d" " user_fault %d gfn %lx\n", @@ -956,9 +957,12 @@ unshadowed: rmap_add(vcpu, shadow_pte, gfn); if (!is_rmap_pte(*shadow_pte)) kvm_release_page_clean(page); + } else { + if (was_writeble) + kvm_release_page_dirty(page); + else + kvm_release_page_clean(page); } - else - kvm_release_page_clean(page); if (!ptwrite || !*ptwrite) vcpu->arch.last_pte_updated = shadow_pte; } -- 2.20.1