Merge branch kvm-arm64/52bit-at into kvmarm-master/next

* kvm-arm64/52bit-at:
  : .
  : Upgrade the S1 page table walker to support 52bit PA, and use it to
  : report the fault level when taking a S2 fault on S1PTW, which is required
  : by the architecture (20250915114451.660351-1-maz@kernel.org).
  : .
  KVM: arm64: selftest: Expand external_aborts test to look for TTW levels
  KVM: arm64: Populate level on S1PTW SEA injection
  KVM: arm64: Add S1 IPA to page table level walker
  KVM: arm64: Add filtering hook to S1 page table walk
  KVM: arm64: Don't switch MMU on translation from non-NV context
  KVM: arm64: Allow EL1 control registers to be accessed from the CPU state
  KVM: arm64: Allow use of S1 PTW for non-NV vcpus
  KVM: arm64: Report faults from S1 walk setup at the expected start level
  KVM: arm64: Expand valid block mappings to FEAT_LPA/LPA2 support
  KVM: arm64: Populate PAR_EL1 with 52bit addresses
  KVM: arm64: Compute shareability for LPA2
  KVM: arm64: Pass the walk_info structure to compute_par_s1()
  KVM: arm64: Decouple output address from the PT descriptor
  KVM: arm64: Compute 52bit TTBR address and alignment
  KVM: arm64: Account for 52bit when computing maximum OA
  KVM: arm64: Add helper computing the state of 52bit PA support

Signed-off-by: Marc Zyngier <maz@kernel.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/tools/testing/selftests/kvm/lib/arm64/processor.c b/tools/testing/selftests/kvm/lib/arm64/processor.c
index eb115123d741..bd7480a93f96 100644
--- a/tools/testing/selftests/kvm/lib/arm64/processor.c
+++ b/tools/testing/selftests/kvm/lib/arm64/processor.c
@@ -185,7 +185,7 @@ void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr)
 	_virt_pg_map(vm, vaddr, paddr, attr_idx);
 }
 
-uint64_t *virt_get_pte_hva(struct kvm_vm *vm, vm_vaddr_t gva)
+uint64_t *virt_get_pte_hva_at_level(struct kvm_vm *vm, vm_vaddr_t gva, int level)
 {
 	uint64_t *ptep;
 
@@ -195,17 +195,23 @@ uint64_t *virt_get_pte_hva(struct kvm_vm *vm, vm_vaddr_t gva)
 	ptep = addr_gpa2hva(vm, vm->pgd) + pgd_index(vm, gva) * 8;
 	if (!ptep)
 		goto unmapped_gva;
+	if (level == 0)
+		return ptep;
 
 	switch (vm->pgtable_levels) {
 	case 4:
 		ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pud_index(vm, gva) * 8;
 		if (!ptep)
 			goto unmapped_gva;
+		if (level == 1)
+			break;
 		/* fall through */
 	case 3:
 		ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pmd_index(vm, gva) * 8;
 		if (!ptep)
 			goto unmapped_gva;
+		if (level == 2)
+			break;
 		/* fall through */
 	case 2:
 		ptep = addr_gpa2hva(vm, pte_addr(vm, *ptep)) + pte_index(vm, gva) * 8;
@@ -223,6 +229,11 @@ unmapped_gva:
 	exit(EXIT_FAILURE);
 }
 
+uint64_t *virt_get_pte_hva(struct kvm_vm *vm, vm_vaddr_t gva)
+{
+	return virt_get_pte_hva_at_level(vm, gva, 3);
+}
+
 vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
 {
 	uint64_t *ptep = virt_get_pte_hva(vm, gva);