| Message ID | 20240726235234.228822-53-seanjc@google.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | KVM: Stop grabbing references to PFNMAP'd pages | expand |
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c index 5c2adfd19e12..334dd96f8081 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; }
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> --- arch/powerpc/kvm/e500_mmu_host.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)