Subject: [PATCH v3 1/6] KVM: selftests: Move pgd_created check into virt_pgd_alloc

From: Nicholas Piggin <[email-masked]>
Date: Thu, 8 Jun 2023 13:24:20 +1000

virt_arch_pgd_alloc all do the same test and set of pgd_created. Move
this into common code.

Signed-off-by: Nicholas Piggin <[email-masked]>
---
 tools/testing/selftests/kvm/include/kvm_util_base.h | 5 +++++
 tools/testing/selftests/kvm/lib/aarch64/processor.c | 4 ----
 tools/testing/selftests/kvm/lib/riscv/processor.c   | 4 ----
 tools/testing/selftests/kvm/lib/s390x/processor.c   | 4 ----
 tools/testing/selftests/kvm/lib/x86_64/processor.c  | 7 ++-----
 5 files changed, 7 insertions(+), 17 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index a089c356f354..d630a0a1877c 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -822,7 +822,12 @@ void virt_arch_pgd_alloc(struct kvm_vm *vm);
 
 static inline void virt_pgd_alloc(struct kvm_vm *vm)
 {
+	if (vm->pgd_created)
+		return;
+
 	virt_arch_pgd_alloc(vm);
+
+	vm->pgd_created = true;
 }
 
 /*
diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c
index 3a0259e25335..3da3ec7c5b23 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/processor.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c
@@ -96,13 +96,9 @@ void virt_arch_pgd_alloc(struct kvm_vm *vm)
 {
 	size_t nr_pages = page_align(vm, ptrs_per_pgd(vm) * 8) / vm->page_size;
 
-	if (vm->pgd_created)
-		return;
-
 	vm->pgd = vm_phy_pages_alloc(vm, nr_pages,
 				     KVM_GUEST_PAGE_TABLE_MIN_PADDR,
 				     vm->memslots[MEM_REGION_PT]);
-	vm->pgd_created = true;
 }
 
 static void _virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
diff --git a/tools/testing/selftests/kvm/lib/riscv/processor.c b/tools/testing/selftests/kvm/lib/riscv/processor.c
index d146ca71e0c0..7695ba2cd369 100644
--- a/tools/testing/selftests/kvm/lib/riscv/processor.c
+++ b/tools/testing/selftests/kvm/lib/riscv/processor.c
@@ -57,13 +57,9 @@ void virt_arch_pgd_alloc(struct kvm_vm *vm)
 {
 	size_t nr_pages = page_align(vm, ptrs_per_pte(vm) * 8) / vm->page_size;
 
-	if (vm->pgd_created)
-		return;
-
 	vm->pgd = vm_phy_pages_alloc(vm, nr_pages,
 				     KVM_GUEST_PAGE_TABLE_MIN_PADDR,
 				     vm->memslots[MEM_REGION_PT]);
-	vm->pgd_created = true;
 }
 
 void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr)
diff --git a/tools/testing/selftests/kvm/lib/s390x/processor.c b/tools/testing/selftests/kvm/lib/s390x/processor.c
index 15945121daf1..358e03f09c7a 100644
--- a/tools/testing/selftests/kvm/lib/s390x/processor.c
+++ b/tools/testing/selftests/kvm/lib/s390x/processor.c
@@ -17,16 +17,12 @@ void virt_arch_pgd_alloc(struct kvm_vm *vm)
 	TEST_ASSERT(vm->page_size == 4096, "Unsupported page size: 0x%x",
 		    vm->page_size);
 
-	if (vm->pgd_created)
-		return;
-
 	paddr = vm_phy_pages_alloc(vm, PAGES_PER_REGION,
 				   KVM_GUEST_PAGE_TABLE_MIN_PADDR,
 				   vm->memslots[MEM_REGION_PT]);
 	memset(addr_gpa2hva(vm, paddr), 0xff, PAGES_PER_REGION * vm->page_size);
 
 	vm->pgd = paddr;
-	vm->pgd_created = true;
 }
 
 /*
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index d4a0b504b1e0..d4deb2718e86 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -127,11 +127,8 @@ void virt_arch_pgd_alloc(struct kvm_vm *vm)
 	TEST_ASSERT(vm->mode == VM_MODE_PXXV48_4K, "Attempt to use "
 		"unknown or unsupported guest mode, mode: 0x%x", vm->mode);
 
-	/* If needed, create page map l4 table. */
-	if (!vm->pgd_created) {
-		vm->pgd = vm_alloc_page_table(vm);
-		vm->pgd_created = true;
-	}
+	/* Create page map l4 table. */
+	vm->pgd = vm_alloc_page_table(vm);
 }
 
 static void *virt_get_pte(struct kvm_vm *vm, uint64_t *parent_pte,
-- 
2.40.1