diff options
| author | Sean Christopherson <seanjc@google.com> | 2024-10-10 11:23:55 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-21 13:49:34 +0100 |
| commit | d2004572fc3014cae43a0d6374ffabbbab1644d4 (patch) | |
| tree | f32cf0ae8c76b9c0c1cfc6f04da6ec8771ad5cb3 /arch | |
| parent | 8b92e9cc04e71afb2be09f78af1de5492a0af4a4 (diff) | |
| download | linux-d2004572fc3014cae43a0d6374ffabbbab1644d4.tar.gz linux-d2004572fc3014cae43a0d6374ffabbbab1644d4.tar.bz2 linux-d2004572fc3014cae43a0d6374ffabbbab1644d4.zip | |
KVM: PPC: e500: Mark "struct page" pfn accessed before dropping mmu_lock
[ Upstream commit 84cf78dcd9d65c45ab73998d4ad50f433d53fb93 ]
Mark pages accessed before dropping mmu_lock when faulting in guest memory
so that shadow_map() can convert to kvm_release_faultin_page() without
tripping its lockdep assertion on mmu_lock being held. Marking pages
accessed outside of mmu_lock is ok (not great, but safe), but marking
pages _dirty_ outside of mmu_lock can make filesystems unhappy.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241010182427.1434605-54-seanjc@google.com>
Stable-dep-of: 87ecfdbc699c ("KVM: e500: always restore irqs")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kvm/e500_mmu_host.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c index 4a086724db8c..29f3e3463f40 100644 --- a/arch/powerpc/kvm/e500_mmu_host.c +++ b/arch/powerpc/kvm/e500_mmu_host.c @@ -498,11 +498,9 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, kvmppc_mmu_flush_icache(pfn); out: - spin_unlock(&kvm->mmu_lock); - /* Drop refcount on page, so that mmu notifiers can clear it */ kvm_release_pfn_clean(pfn); - + spin_unlock(&kvm->mmu_lock); return ret; } |