[PATCH 1/4] KVM: arm64: Use KVM's pte type/helpers in handle_access_fault()

Oliver Upton
2022-11-29T19:20:04Z

Consistently use KVM's own pte types and helpers in
handle_access_fault().

No functional change intended.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
arch/arm64/include/asm/kvm_pgtable.h | 5 +++++
arch/arm64/kvm/mmu.c | 10 ++++------
2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h
index 63f81b27a4e3..192f33b88dc1 100644
--- a/arch/arm64/include/asm/kvm_pgtable.h
+++ b/arch/arm64/include/asm/kvm_pgtable.h
@@ -71,6 +71,11 @@ static inline kvm_pte_t kvm_phys_to_pte(u64 pa)
return pte;
}

+static inline kvm_pfn_t kvm_pte_to_pfn(kvm_pte_t pte)
+{
+ return __phys_to_pfn(kvm_pte_to_phys(pte));
+}
+
static inline u64 kvm_granule_shift(u32 level)
{
/* Assumes KVM_PGTABLE_MAX_LEVELS is 4 */
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index a3c71b5172cd..886ad5ee767a 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1399,20 +1399,18 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
/* Resolve the access fault by making the page young again. */
static void handle_access_fault(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
{
- pte_t pte;
- kvm_pte_t kpte;
+ kvm_pte_t pte;
struct kvm_s2_mmu *mmu;

trace_kvm_access_fault(fault_ipa);

write_lock(&vcpu->kvm->mmu_lock);
mmu = vcpu->arch.hw_mmu;
- kpte = kvm_pgtable_stage2_mkyoung(mmu->pgt, fault_ipa);
+ pte = kvm_pgtable_stage2_mkyoung(mmu->pgt, fault_ipa);
write_unlock(&vcpu->kvm->mmu_lock);

- pte = __pte(kpte);
- if (pte_valid(pte))
- kvm_set_pfn_accessed(pte_pfn(pte));
+ if (kvm_pte_valid(pte))
+ kvm_set_pfn_accessed(kvm_pte_to_pfn(pte));
}

/**
--
2.38.1.584.g0f3c55d4c2-goog