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authorAndres Lagar-Cavilla <andreslc@google.com>2014-09-22 14:54:42 -0700
committerPaolo Bonzini <pbonzini@redhat.com>2014-09-24 14:07:58 +0200
commit57128468080a8b6ea452223036d3e417f748af55 (patch)
treee89cfc349a9c39710cfab4e387119365a0d64958 /arch/powerpc/kvm/book3s_pr.c
parent8a9522d2fe6a1b643d3aef5ab7f097f73c601e7a (diff)
kvm: Fix page ageing bugs
1. We were calling clear_flush_young_notify in unmap_one, but we are within an mmu notifier invalidate range scope. The spte exists no more (due to range_start) and the accessed bit info has already been propagated (due to kvm_pfn_set_accessed). Simply call clear_flush_young. 2. We clear_flush_young on a primary MMU PMD, but this may be mapped as a collection of PTEs by the secondary MMU (e.g. during log-dirty). This required expanding the interface of the clear_flush_young mmu notifier, so a lot of code has been trivially touched. 3. In the absence of shadow_accessed_mask (e.g. EPT A bit), we emulate the access bit by blowing the spte. This requires proper synchronizing with MMU notifier consumers, like every other removal of spte's does. Signed-off-by: Andres Lagar-Cavilla <andreslc@google.com> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm/book3s_pr.c')
-rw-r--r--arch/powerpc/kvm/book3s_pr.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index faffb27badd9..852fcd8951c4 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -295,7 +295,8 @@ static int kvm_unmap_hva_range_pr(struct kvm *kvm, unsigned long start,
return 0;
}
-static int kvm_age_hva_pr(struct kvm *kvm, unsigned long hva)
+static int kvm_age_hva_pr(struct kvm *kvm, unsigned long start,
+ unsigned long end)
{
/* XXX could be more clever ;) */
return 0;