[PATCH v2 1/4] KVM: selftests: Move pgd_created check into virt_pgd_alloc

From: Nicholas Piggin <npiggin@gmail.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Nicholas Piggin <npiggin@gmail.com>,
	Shuah Khan <shuah@kernel.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Sean Christopherson <seanjc@google.com>,
	kvm@vger.kernel.org, linux-kselftest@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 1/4] KVM: selftests: Move pgd_created check into virt_pgd_alloc
Date: Sat,  8 Apr 2023 14:00:17 +1000	[thread overview]
Message-ID: <20230408040020.868929-2-npiggin@gmail.com> (raw)
In-Reply-To: <20230408040020.868929-1-npiggin@gmail.com>

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

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 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 fbc2a79369b8..16425da16861 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -821,7 +821,12 @@ 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 5972a23b2765..76edd988178b 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/processor.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c
@@ -79,13 +79,9 @@ 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 c39a4353ba19..d49068045bdf 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -126,11 +126,8 @@ 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,
-- 
2.40.0

