6.12-stable review patch. If anyone has any objections, please let me know.
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From: Sean Christopherson seanjc@google.com
[ 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 --- arch/powerpc/kvm/e500_mmu_host.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c index 5c2adfd19e123..334dd96f80814 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; }