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| author | Will Deacon <will@kernel.org> | 2020-08-11 11:27:24 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-26 10:31:07 +0200 |
| commit | a53dc16499fc9efd8db0b40e45f3344a0fb9c0a2 (patch) | |
| tree | 62fcefee901521dd4b324b438eec3d8577534dcf /virt | |
| parent | 903c6bd937ca84ee9e60eca6beb5c2593d0bfd4e (diff) | |
| download | linux-stable-a53dc16499fc9efd8db0b40e45f3344a0fb9c0a2.tar.gz linux-stable-a53dc16499fc9efd8db0b40e45f3344a0fb9c0a2.tar.bz2 linux-stable-a53dc16499fc9efd8db0b40e45f3344a0fb9c0a2.zip | |
KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()
commit fdfe7cbd58806522e799e2a50a15aee7f2cbb7b6 upstream.
The 'flags' field of 'struct mmu_notifier_range' is used to indicate
whether invalidate_range_{start,end}() are permitted to block. In the
case of kvm_mmu_notifier_invalidate_range_start(), this field is not
forwarded on to the architecture-specific implementation of
kvm_unmap_hva_range() and therefore the backend cannot sensibly decide
whether or not to block.
Add an extra 'flags' parameter to kvm_unmap_hva_range() so that
architectures are aware as to whether or not they are permitted to block.
Cc: <stable@vger.kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Message-Id: <20200811102725.7121-2-will@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[will: Backport to 4.19; use 'blockable' instead of non-existent range flags]
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/mmu.c | 2 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index a5bc10d30618..3957ff0ecda5 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -1825,7 +1825,7 @@ static int kvm_unmap_hva_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *dat } int kvm_unmap_hva_range(struct kvm *kvm, - unsigned long start, unsigned long end) + unsigned long start, unsigned long end, bool blockable) { if (!kvm->arch.pgd) return 0; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 1218ea663c6d..2155b52b17ec 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -410,7 +410,7 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, * count is also read inside the mmu_lock critical section. */ kvm->mmu_notifier_count++; - need_tlb_flush = kvm_unmap_hva_range(kvm, start, end); + need_tlb_flush = kvm_unmap_hva_range(kvm, start, end, blockable); need_tlb_flush |= kvm->tlbs_dirty; /* we've to flush the tlb before the pages can be freed */ if (need_tlb_flush) |