[PATCH v4 01/10] selftests: kvm: s390: Define page sizes in shared header

Christoph Schlameuss
2024-08-02T15:59:55Z

Multiple test cases need page size and shift definitions.
By moving the definitions to a single architecture specific header we
limit the repetition.

Make use of PAGE_SIZE, PAGE_SHIFT and PAGE_MASK defines in existing
code.

Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
---
tools/testing/selftests/kvm/include/s390x/processor.h | 5 +++++
tools/testing/selftests/kvm/lib/s390x/processor.c | 10 +++++-----
tools/testing/selftests/kvm/s390x/cmma_test.c | 7 ++++---
tools/testing/selftests/kvm/s390x/memop.c | 4 +---
tools/testing/selftests/kvm/s390x/tprot.c | 5 ++---
5 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/s390x/processor.h b/tools/testing/selftests/kvm/include/s390x/processor.h
index 255c9b990f4c..481bd2fd6a32 100644
--- a/tools/testing/selftests/kvm/include/s390x/processor.h
+++ b/tools/testing/selftests/kvm/include/s390x/processor.h
@@ -21,6 +21,11 @@
#define PAGE_PROTECT 0x200 /* HW read-only bit */
#define PAGE_NOEXEC 0x100 /* HW no-execute bit */

+/* Page size definitions */
+#define PAGE_SHIFT 12
+#define PAGE_SIZE BIT_ULL(PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE - 1))
+
/* Is there a portable way to do this? */
static inline void cpu_relax(void)
{
diff --git a/tools/testing/selftests/kvm/lib/s390x/processor.c b/tools/testing/selftests/kvm/lib/s390x/processor.c
index 4ad4492eea1d..20cfe970e3e3 100644
--- a/tools/testing/selftests/kvm/lib/s390x/processor.c
+++ b/tools/testing/selftests/kvm/lib/s390x/processor.c
@@ -14,7 +14,7 @@ void virt_arch_pgd_alloc(struct kvm_vm *vm)
{
vm_paddr_t paddr;

- TEST_ASSERT(vm->page_size == 4096, "Unsupported page size: 0x%x",
+ TEST_ASSERT(vm->page_size == PAGE_SIZE, "Unsupported page size: 0x%x",
vm->page_size);

if (vm->pgd_created)
@@ -79,7 +79,7 @@ void virt_arch_pg_map(struct kvm_vm *vm, uint64_t gva, uint64_t gpa)
}

/* Fill in page table entry */
- idx = (gva >> 12) & 0x0ffu; /* page index */
+ idx = (gva >> PAGE_SHIFT) & 0x0ffu; /* page index */
if (!(entry[idx] & PAGE_INVALID))
fprintf(stderr,
"WARNING: PTE for gpa=0x%"PRIx64" already set!\n", gpa);
@@ -91,7 +91,7 @@ vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
int ri, idx;
uint64_t *entry;

- TEST_ASSERT(vm->page_size == 4096, "Unsupported page size: 0x%x",
+ TEST_ASSERT(vm->page_size == PAGE_SIZE, "Unsupported page size: 0x%x",
vm->page_size);

entry = addr_gpa2hva(vm, vm->pgd);
@@ -103,7 +103,7 @@ vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
entry = addr_gpa2hva(vm, entry[idx] & REGION_ENTRY_ORIGIN);
}

- idx = (gva >> 12) & 0x0ffu; /* page index */
+ idx = (gva >> PAGE_SHIFT) & 0x0ffu; /* page index */

TEST_ASSERT(!(entry[idx] & PAGE_INVALID),
"No page mapping for vm virtual address 0x%lx", gva);
@@ -168,7 +168,7 @@ struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id)
struct kvm_sregs sregs;
struct kvm_vcpu *vcpu;

- TEST_ASSERT(vm->page_size == 4096, "Unsupported page size: 0x%x",
+ TEST_ASSERT(vm->page_size == PAGE_SIZE, "Unsupported page size: 0x%x",
vm->page_size);

stack_vaddr = __vm_vaddr_alloc(vm, stack_size,
diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
index b39033844756..e32dd59703a0 100644
--- a/tools/testing/selftests/kvm/s390x/cmma_test.c
+++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
@@ -17,16 +17,17 @@
#include "kvm_util.h"
#include "kselftest.h"
#include "ucall_common.h"
+#include "processor.h"

#define MAIN_PAGE_COUNT 512

#define TEST_DATA_PAGE_COUNT 512
#define TEST_DATA_MEMSLOT 1
-#define TEST_DATA_START_GFN 4096
+#define TEST_DATA_START_GFN PAGE_SIZE

#define TEST_DATA_TWO_PAGE_COUNT 256
#define TEST_DATA_TWO_MEMSLOT 2
-#define TEST_DATA_TWO_START_GFN 8192
+#define TEST_DATA_TWO_START_GFN (2 * PAGE_SIZE)

static char cmma_value_buf[MAIN_PAGE_COUNT + TEST_DATA_PAGE_COUNT];

@@ -66,7 +67,7 @@ static void guest_dirty_test_data(void)
" lghi 5,%[page_count]\n"
/* r5 += r1 */
"2: agfr 5,1\n"
- /* r2 = r1 << 12 */
+ /* r2 = r1 << PAGE_SHIFT */
"1: sllg 2,1,12(0)\n"
/* essa(r4, r2, SET_STABLE) */
" .insn rrf,0xb9ab0000,4,2,1,0\n"
diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c
index f2df7416be84..4374b4cd2a80 100644
--- a/tools/testing/selftests/kvm/s390x/memop.c
+++ b/tools/testing/selftests/kvm/s390x/memop.c
@@ -16,6 +16,7 @@
#include "kvm_util.h"
#include "kselftest.h"
#include "ucall_common.h"
+#include "processor.h"

enum mop_target {
LOGICAL,
@@ -226,9 +227,6 @@ static void memop_ioctl(struct test_info info, struct kvm_s390_mem_op *ksmo,

#define CHECK_N_DO(f, ...) ({ f(__VA_ARGS__, CHECK_ONLY); f(__VA_ARGS__); })

-#define PAGE_SHIFT 12
-#define PAGE_SIZE (1ULL << PAGE_SHIFT)
-#define PAGE_MASK (~(PAGE_SIZE - 1))
#define CR0_FETCH_PROTECTION_OVERRIDE (1UL << (63 - 38))
#define CR0_STORAGE_PROTECTION_OVERRIDE (1UL << (63 - 39))

diff --git a/tools/testing/selftests/kvm/s390x/tprot.c b/tools/testing/selftests/kvm/s390x/tprot.c
index 7a742a673b7c..12d5e1cb62e3 100644
--- a/tools/testing/selftests/kvm/s390x/tprot.c
+++ b/tools/testing/selftests/kvm/s390x/tprot.c
@@ -9,9 +9,8 @@
#include "kvm_util.h"
#include "kselftest.h"
#include "ucall_common.h"
+#include "processor.h"

-#define PAGE_SHIFT 12
-#define PAGE_SIZE (1 << PAGE_SHIFT)
#define CR0_FETCH_PROTECTION_OVERRIDE (1UL << (63 - 38))
#define CR0_STORAGE_PROTECTION_OVERRIDE (1UL << (63 - 39))

@@ -151,7 +150,7 @@ static enum stage perform_next_stage(int *i, bool mapped_0)
* instead.
* In order to skip these tests we detect this inside the guest
*/
- skip = tests[*i].addr < (void *)4096 &&
+ skip = tests[*i].addr < (void *)PAGE_SIZE &&
tests[*i].expected != TRANSL_UNAVAIL &&
!mapped_0;
if (!skip) {
--
2.45.2