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author | Andres Lagar-Cavilla <andreslc@google.com> | 2014-09-22 14:54:42 -0700 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-09-24 14:07:58 +0200 |
commit | 57128468080a8b6ea452223036d3e417f748af55 (patch) | |
tree | e89cfc349a9c39710cfab4e387119365a0d64958 /arch/arm/include | |
parent | 8a9522d2fe6a1b643d3aef5ab7f097f73c601e7a (diff) | |
download | op-kernel-dev-57128468080a8b6ea452223036d3e417f748af55.zip op-kernel-dev-57128468080a8b6ea452223036d3e417f748af55.tar.gz |
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/arm/include')
-rw-r--r-- | arch/arm/include/asm/kvm_host.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 032a853..8c3f7eb 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -170,7 +170,8 @@ unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); /* We do not have shadow page tables, hence the empty hooks */ -static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) +static inline int kvm_age_hva(struct kvm *kvm, unsigned long start, + unsigned long end) { return 0; } |