s390x can have up to 47bits of physical guest and 64bits of virtual
address bits. Add a new address mode to avoid errors of testcases
going beyond 47bits.
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
v1->v2:
- remove wrong comment
- use 5 levels of page tables
tools/testing/selftests/kvm/include/kvm_util.h | 3 ++-
tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++++
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index fcd8e3855111..b602552b1ed0 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -43,6 +43,7 @@ enum vm_guest_mode {
VM_MODE_P40V48_4K,
VM_MODE_P40V48_64K,
VM_MODE_PXXV48_4K, /* For 48bits VA but ANY bits PA */
+ VM_MODE_P47V64_4K,
NUM_VM_MODES,
};
@@ -60,7 +61,7 @@ enum vm_guest_mode {
#elif defined(__s390x__)
-#define VM_MODE_DEFAULT VM_MODE_P52V48_4K
+#define VM_MODE_DEFAULT VM_MODE_P47V64_4K
#define MIN_PAGE_SHIFT 12U
#define ptes_per_page(page_size) ((page_size) / 16)
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 28e528c19d28..b126fab6c4e1 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -175,6 +175,7 @@ const char *vm_guest_mode_string(uint32_t i)
[VM_MODE_P40V48_4K] = "PA-bits:40, VA-bits:48, 4K pages",
[VM_MODE_P40V48_64K] = "PA-bits:40, VA-bits:48, 64K pages",
[VM_MODE_PXXV48_4K] = "PA-bits:ANY, VA-bits:48, 4K pages",
+ [VM_MODE_P47V64_4K] = "PA-bits:47, VA-bits:64, 4K pages",
};
_Static_assert(sizeof(strings)/sizeof(char *) == NUM_VM_MODES,
"Missing new mode strings?");
@@ -192,6 +193,7 @@ const struct vm_guest_mode_params vm_guest_mode_params[] = {
{ 40, 48, 0x1000, 12 },
{ 40, 48, 0x10000, 16 },
{ 0, 0, 0x1000, 12 },
+ { 47, 64, 0x1000, 12 },
};
_Static_assert(sizeof(vm_guest_mode_params)/sizeof(struct vm_guest_mode_params) == NUM_VM_MODES,
"Missing new mode params?");
@@ -277,6 +279,9 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
TEST_FAIL("VM_MODE_PXXV48_4K not supported on non-x86 platforms");
#endif
break;
+ case VM_MODE_P47V64_4K:
+ vm->pgtable_levels = 5;
+ break;
default:
TEST_FAIL("Unknown guest mode, mode: 0x%x", mode);
}
