[PATCH v22 12/23] KVM: arm64: Use a local kvm pointer in kvm_handle_guest_abort()

[Suzuki K Poulose <suzuki.poulose@arm.com>]

kvm_handle_guest_abort() repeatedly obtains the VM from vcpu->kvm.

Introduce a local kvm pointer and use it throughout the function. While
touching the code, fix the missing whitespace in the
kvm_is_nested_s2_mmu() call.

Suggested-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 arch/arm64/kvm/mmu.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index c046c76833876..9cc7fcde4dd0a 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -2284,6 +2284,7 @@ int kvm_handle_guest_sea(struct kvm_vcpu *vcpu)
  */
 int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
 {
+	struct kvm *kvm = vcpu->kvm;
 	struct kvm_s2_trans nested_trans, *nested = NULL;
 	unsigned long esr;
 	phys_addr_t fault_ipa; /* The address we faulted on */
@@ -2304,7 +2305,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
 	 * with an SEA.
 	 */
 	ipa = fault_ipa = kvm_vcpu_get_fault_ipa(vcpu);
-	if (KVM_BUG_ON(ipa == INVALID_GPA, vcpu->kvm))
+	if (KVM_BUG_ON(ipa == INVALID_GPA, kvm))
 		return -EFAULT;
 
 	is_iabt = kvm_vcpu_trap_is_iabt(vcpu);
@@ -2339,7 +2340,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
 		return -EFAULT;
 	}
 
-	idx = srcu_read_lock(&vcpu->kvm->srcu);
+	idx = srcu_read_lock(&kvm->srcu);
 
 	/*
 	 * We may have faulted on a shadow stage 2 page table if we are
@@ -2354,7 +2355,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
 	 * nothing to walk and we treat it as a 1:1 before going through the
 	 * canonical translation.
 	 */
-	if (kvm_is_nested_s2_mmu(vcpu->kvm,vcpu->arch.hw_mmu) &&
+	if (kvm_is_nested_s2_mmu(kvm, vcpu->arch.hw_mmu) &&
 	    vcpu->arch.hw_mmu->nested_stage2_enabled) {
 		u32 esr;
 
@@ -2382,7 +2383,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
 	}
 
 	gfn = ipa >> PAGE_SHIFT;
-	memslot = gfn_to_memslot(vcpu->kvm, gfn);
+	memslot = gfn_to_memslot(kvm, gfn);
 	hva = gfn_to_hva_memslot_prot(memslot, gfn, &writable);
 	write_fault = kvm_is_write_fault(vcpu);
 	if (kvm_is_error_hva(hva) || (write_fault && !writable)) {
@@ -2446,7 +2447,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
 		.hva		= hva,
 	};
 
-	if (kvm_vm_is_protected(vcpu->kvm)) {
+	if (kvm_vm_is_protected(kvm)) {
 		ret = pkvm_mem_abort(&s2fd);
 	} else {
 		VM_WARN_ON_ONCE(kvm_vcpu_trap_is_permission_fault(vcpu) &&
@@ -2465,7 +2466,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
 	if (ret == -ENOEXEC)
 		ret = kvm_inject_sea_iabt(vcpu, kvm_vcpu_get_hfar(vcpu));
 out_unlock:
-	srcu_read_unlock(&vcpu->kvm->srcu, idx);
+	srcu_read_unlock(&kvm->srcu, idx);
 	return ret;
 }
 
-- 
2.43.0