From 33fd27c7d26ec869f637634526e7293027bd8746 Mon Sep 17 00:00:00 2001 From: Alexander Graf <agraf@suse.de> Date: Fri, 16 Apr 2010 00:11:49 +0200 Subject: [PATCH] KVM: PPC: Release clean pages as clean When we mapped a page as read-only, we can just release it as clean to KVM's page claim mechanisms, because we're pretty sure it hasn't been touched. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com> --- arch/powerpc/kvm/book3s_64_mmu_host.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kvm/book3s_64_mmu_host.c b/arch/powerpc/kvm/book3s_64_mmu_host.c index 0eea589dbef0..b23015438371 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_host.c +++ b/arch/powerpc/kvm/book3s_64_mmu_host.c @@ -55,7 +55,11 @@ static void invalidate_pte(struct hpte_cache *pte) MMU_PAGE_4K, MMU_SEGSIZE_256M, false); pte->host_va = 0; - kvm_release_pfn_dirty(pte->pfn); + + if (pte->pte.may_write) + kvm_release_pfn_dirty(pte->pfn); + else + kvm_release_pfn_clean(pte->pfn); } void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, u64 guest_ea, u64 ea_mask)