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Diffstat (limited to 'tools/testing/selftests/kvm/s390x/memop.c')
-rw-r--r--tools/testing/selftests/kvm/s390x/memop.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c
index bb3ca9a5d7..48cb910e66 100644
--- a/tools/testing/selftests/kvm/s390x/memop.c
+++ b/tools/testing/selftests/kvm/s390x/memop.c
@@ -375,6 +375,32 @@ static void test_copy(void)
kvm_vm_free(t.kvm_vm);
}
+static void test_copy_access_register(void)
+{
+ struct test_default t = test_default_init(guest_copy);
+
+ HOST_SYNC(t.vcpu, STAGE_INITED);
+
+ prepare_mem12();
+ t.run->psw_mask &= ~(3UL << (63 - 17));
+ t.run->psw_mask |= 1UL << (63 - 17); /* Enable AR mode */
+
+ /*
+ * Primary address space gets used if an access register
+ * contains zero. The host makes use of AR[1] so is a good
+ * candidate to ensure the guest AR (of zero) is used.
+ */
+ CHECK_N_DO(MOP, t.vcpu, LOGICAL, WRITE, mem1, t.size,
+ GADDR_V(mem1), AR(1));
+ HOST_SYNC(t.vcpu, STAGE_COPIED);
+
+ CHECK_N_DO(MOP, t.vcpu, LOGICAL, READ, mem2, t.size,
+ GADDR_V(mem2), AR(1));
+ ASSERT_MEM_EQ(mem1, mem2, t.size);
+
+ kvm_vm_free(t.kvm_vm);
+}
+
static void set_storage_key_range(void *addr, size_t len, uint8_t key)
{
uintptr_t _addr, abs, i;
@@ -489,6 +515,8 @@ static __uint128_t rotate(int size, __uint128_t val, int amount)
amount = (amount + bits) % bits;
val = cut_to_size(size, val);
+ if (!amount)
+ return val;
return (val << (bits - amount)) | (val >> amount);
}
@@ -1102,6 +1130,11 @@ int main(int argc, char *argv[])
.requirements_met = extension_cap > 0,
},
{
+ .name = "copy with access register mode",
+ .test = test_copy_access_register,
+ .requirements_met = true,
+ },
+ {
.name = "error checks with key",
.test = test_errors_key,
.requirements_met = extension_cap > 0,