linux-kernel - [RFC PATCH 10/16] KVM: arm64: Drop local vfio_allow_any_uc, use vm

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Message-ID: <20250821210042.3451147-11-seanjc@google.com>
Date: Thu, 21 Aug 2025 14:00:36 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>
Cc: linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, Sean Christopherson <seanjc@...gle.com>, 
	James Houghton <jthoughton@...gle.com>
Subject: [RFC PATCH 10/16] KVM: arm64: Drop local vfio_allow_any_uc, use
 vm_flags snapshot

Drop user_mem_abort()'s local vfio_allow_any_uc variable and instead use
the vm_flags snapshot.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/arm64/kvm/mmu.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 10c73494d505..e1375296940b 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1476,7 +1476,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
 	int ret = 0;
 	bool writable, force_pte = false;
 	bool mte_allowed, is_vma_cacheable;
-	bool s2_force_noncacheable = false, vfio_allow_any_uc = false;
+	bool s2_force_noncacheable = false;
 	unsigned long mmu_seq;
 	struct kvm *kvm = vcpu->kvm;
 	struct vm_area_struct *vma;
@@ -1608,8 +1608,6 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
 	fault->gfn = fault->ipa >> PAGE_SHIFT;
 	mte_allowed = kvm_vma_mte_allowed(vma);
 
-	vfio_allow_any_uc = vma->vm_flags & VM_ALLOW_ANY_UNCACHED;
-
 	vm_flags = vma->vm_flags;
 
 	is_vma_cacheable = kvm_vma_is_cacheable(vma);
@@ -1741,7 +1739,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
 		prot |= KVM_PGTABLE_PROT_X;
 
 	if (s2_force_noncacheable) {
-		if (vfio_allow_any_uc)
+		if (vm_flags & VM_ALLOW_ANY_UNCACHED)
 			prot |= KVM_PGTABLE_PROT_NORMAL_NC;
 		else
 			prot |= KVM_PGTABLE_PROT_DEVICE;
-- 
2.51.0.261.g7ce5a0a67e-goog