[PATCH v13 56/85] KVM: arm64: Use __kvm_faultin_pfn() to handle memory aborts

[Sean Christopherson]

Convert arm64 to use __kvm_faultin_pfn()+kvm_release_faultin_page().
Three down, six to go.

Tested-by: Alex Bennée <alex.bennee at linaro.org>
Signed-off-by: Sean Christopherson <seanjc at google.com>
---
 arch/arm64/kvm/mmu.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index ecc6c2b56c43..4054356c9712 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1439,6 +1439,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 	long vma_pagesize, fault_granule;
 	enum kvm_pgtable_prot prot = KVM_PGTABLE_PROT_R;
 	struct kvm_pgtable *pgt;
+	struct page *page;
 
 	if (fault_is_perm)
 		fault_granule = kvm_vcpu_trap_get_perm_fault_granule(vcpu);
@@ -1560,7 +1561,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 
 	/*
 	 * Read mmu_invalidate_seq so that KVM can detect if the results of
-	 * vma_lookup() or __gfn_to_pfn_memslot() become stale prior to
+	 * vma_lookup() or __kvm_faultin_pfn() become stale prior to
 	 * acquiring kvm->mmu_lock.
 	 *
 	 * Rely on mmap_read_unlock() for an implicit smp_rmb(), which pairs
@@ -1569,8 +1570,8 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 	mmu_seq = vcpu->kvm->mmu_invalidate_seq;
 	mmap_read_unlock(current->mm);
 
-	pfn = __gfn_to_pfn_memslot(memslot, gfn, false, NULL,
-				   write_fault, &writable);
+	pfn = __kvm_faultin_pfn(memslot, gfn, write_fault ? FOLL_WRITE : 0,
+				&writable, &page);
 	if (pfn == KVM_PFN_ERR_HWPOISON) {
 		kvm_send_hwpoison_signal(hva, vma_shift);
 		return 0;
@@ -1583,7 +1584,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 		 * If the page was identified as device early by looking at
 		 * the VMA flags, vma_pagesize is already representing the
 		 * largest quantity we can map.  If instead it was mapped
-		 * via gfn_to_pfn_prot(), vma_pagesize is set to PAGE_SIZE
+		 * via __kvm_faultin_pfn(), vma_pagesize is set to PAGE_SIZE
 		 * and must not be upgraded.
 		 *
 		 * In both cases, we don't let transparent_hugepage_adjust()
@@ -1692,11 +1693,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 	}
 
 out_unlock:
-	if (writable && !ret)
-		kvm_release_pfn_dirty(pfn);
-	else
-		kvm_release_pfn_clean(pfn);
-
+	kvm_release_faultin_page(kvm, page, !!ret, writable);
 	read_unlock(&kvm->mmu_lock);
 
 	/* Mark the page dirty only if the fault is handled successfully */
-- 
2.47.0.rc1.288.g06298d1525-goog