[PATCH v4 13/22] powerpc/kvm/book3s: Use find_kvm_host_pte in page fault handler

Aneesh Kumar K.V aneesh.kumar at linux.ibm.com
Tue May 5 17:17:20 AEST 2020


Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>
---
 arch/powerpc/kvm/book3s_64_mmu_hv.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 2b35f9bcf892..38e934dc1714 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -602,12 +602,12 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
 	 * Read the PTE from the process' radix tree and use that
 	 * so we get the shift and attribute bits.
 	 */
-	local_irq_disable();
-	ptep = __find_linux_pte(vcpu->arch.pgdir, hva, NULL, &shift);
+	spin_lock(&kvm->mmu_lock);
+	ptep = find_kvm_host_pte(kvm, mmu_seq, hva, &shift)
 	pte = __pte(0);
 	if (ptep)
-		pte = *ptep;
-	local_irq_enable();
+		pte = READ_ONCE(*ptep);
+	spin_unlock(&kvm->mmu_lock);
 	/*
 	 * If the PTE disappeared temporarily due to a THP
 	 * collapse, just return and let the guest try again.
-- 
2.26.2



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