From: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
To: Christian Borntraeger <borntraeger@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Shuah Khan <shuah@kernel.org>
Cc: Janis Schoetterl-Glausch <scgl@linux.ibm.com>,
Thomas Huth <thuth@redhat.com>,
David Hildenbrand <david@redhat.com>,
kvm@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/5] KVM: s390: selftests: Split memop tests
Date: Tue, 8 Mar 2022 13:58:37 +0100 [thread overview]
Message-ID: <20220308125841.3271721-2-scgl@linux.ibm.com> (raw)
In-Reply-To: <20220308125841.3271721-1-scgl@linux.ibm.com>
Split success case/copy test from error test, making them independent.
This means they do not share state and are easier to understand.
Also, new test can be added in the same manner without affecting the old
ones. In order to make that simpler, introduce functionality for the
setup of commonly used variables.
Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
---
tools/testing/selftests/kvm/s390x/memop.c | 137 +++++++++++++---------
1 file changed, 82 insertions(+), 55 deletions(-)
diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c
index d19c3ffdea3f..b9b673acb766 100644
--- a/tools/testing/selftests/kvm/s390x/memop.c
+++ b/tools/testing/selftests/kvm/s390x/memop.c
@@ -18,71 +18,82 @@
static uint8_t mem1[65536];
static uint8_t mem2[65536];
-static void guest_code(void)
+struct test_default {
+ struct kvm_vm *kvm_vm;
+ struct kvm_run *run;
+ int size;
+};
+
+static struct test_default test_default_init(void *guest_code)
{
- int i;
+ struct test_default t;
- for (;;) {
- for (i = 0; i < sizeof(mem2); i++)
- mem2[i] = mem1[i];
- GUEST_SYNC(0);
- }
+ t.size = min((size_t)kvm_check_cap(KVM_CAP_S390_MEM_OP), sizeof(mem1));
+ t.kvm_vm = vm_create_default(VCPU_ID, 0, guest_code);
+ t.run = vcpu_state(t.kvm_vm, VCPU_ID);
+ return t;
}
-int main(int argc, char *argv[])
+static void guest_copy(void)
{
- struct kvm_vm *vm;
- struct kvm_run *run;
- struct kvm_s390_mem_op ksmo;
- int rv, i, maxsize;
-
- setbuf(stdout, NULL); /* Tell stdout not to buffer its content */
-
- maxsize = kvm_check_cap(KVM_CAP_S390_MEM_OP);
- if (!maxsize) {
- print_skip("CAP_S390_MEM_OP not supported");
- exit(KSFT_SKIP);
- }
- if (maxsize > sizeof(mem1))
- maxsize = sizeof(mem1);
+ memcpy(&mem2, &mem1, sizeof(mem2));
+ GUEST_SYNC(0);
+}
- /* Create VM */
- vm = vm_create_default(VCPU_ID, 0, guest_code);
- run = vcpu_state(vm, VCPU_ID);
+static void test_copy(void)
+{
+ struct test_default t = test_default_init(guest_copy);
+ struct kvm_s390_mem_op ksmo;
+ int i;
for (i = 0; i < sizeof(mem1); i++)
mem1[i] = i * i + i;
/* Set the first array */
- ksmo.gaddr = addr_gva2gpa(vm, (uintptr_t)mem1);
+ ksmo.gaddr = addr_gva2gpa(t.kvm_vm, (uintptr_t)mem1);
ksmo.flags = 0;
- ksmo.size = maxsize;
+ ksmo.size = t.size;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
- vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
/* Let the guest code copy the first array to the second */
- vcpu_run(vm, VCPU_ID);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_S390_SIEIC,
+ vcpu_run(t.kvm_vm, VCPU_ID);
+ TEST_ASSERT(t.run->exit_reason == KVM_EXIT_S390_SIEIC,
"Unexpected exit reason: %u (%s)\n",
- run->exit_reason,
- exit_reason_str(run->exit_reason));
+ t.run->exit_reason,
+ exit_reason_str(t.run->exit_reason));
memset(mem2, 0xaa, sizeof(mem2));
/* Get the second array */
ksmo.gaddr = (uintptr_t)mem2;
ksmo.flags = 0;
- ksmo.size = maxsize;
+ ksmo.size = t.size;
ksmo.op = KVM_S390_MEMOP_LOGICAL_READ;
ksmo.buf = (uintptr_t)mem2;
ksmo.ar = 0;
- vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
- TEST_ASSERT(!memcmp(mem1, mem2, maxsize),
+ TEST_ASSERT(!memcmp(mem1, mem2, t.size),
"Memory contents do not match!");
+ kvm_vm_free(t.kvm_vm);
+}
+
+static void guest_idle(void)
+{
+ for (;;)
+ GUEST_SYNC(0);
+}
+
+static void test_errors(void)
+{
+ struct test_default t = test_default_init(guest_idle);
+ struct kvm_s390_mem_op ksmo;
+ int rv;
+
/* Check error conditions - first bad size: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
@@ -90,7 +101,7 @@ int main(int argc, char *argv[])
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == E2BIG, "ioctl allows insane sizes");
/* Zero size: */
@@ -100,65 +111,65 @@ int main(int argc, char *argv[])
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && (errno == EINVAL || errno == ENOMEM),
"ioctl allows 0 as size");
/* Bad flags: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = -1;
- ksmo.size = maxsize;
+ ksmo.size = t.size;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows all flags");
/* Bad operation: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
- ksmo.size = maxsize;
+ ksmo.size = t.size;
ksmo.op = -1;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows bad operations");
/* Bad guest address: */
ksmo.gaddr = ~0xfffUL;
ksmo.flags = KVM_S390_MEMOP_F_CHECK_ONLY;
- ksmo.size = maxsize;
+ ksmo.size = t.size;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv > 0, "ioctl does not report bad guest memory access");
/* Bad host address: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
- ksmo.size = maxsize;
+ ksmo.size = t.size;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = 0;
ksmo.ar = 0;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EFAULT,
"ioctl does not report bad host memory address");
/* Bad access register: */
- run->psw_mask &= ~(3UL << (63 - 17));
- run->psw_mask |= 1UL << (63 - 17); /* Enable AR mode */
- vcpu_run(vm, VCPU_ID); /* To sync new state to SIE block */
+ t.run->psw_mask &= ~(3UL << (63 - 17));
+ t.run->psw_mask |= 1UL << (63 - 17); /* Enable AR mode */
+ vcpu_run(t.kvm_vm, VCPU_ID); /* To sync new state to SIE block */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
- ksmo.size = maxsize;
+ ksmo.size = t.size;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 17;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows ARs > 15");
- run->psw_mask &= ~(3UL << (63 - 17)); /* Disable AR mode */
- vcpu_run(vm, VCPU_ID); /* Run to sync new state */
+ t.run->psw_mask &= ~(3UL << (63 - 17)); /* Disable AR mode */
+ vcpu_run(t.kvm_vm, VCPU_ID); /* Run to sync new state */
/* Check that the SIDA calls are rejected for non-protected guests */
ksmo.gaddr = 0;
@@ -167,15 +178,31 @@ int main(int argc, char *argv[])
ksmo.op = KVM_S390_MEMOP_SIDA_READ;
ksmo.buf = (uintptr_t)mem1;
ksmo.sida_offset = 0x1c0;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EINVAL,
"ioctl does not reject SIDA_READ in non-protected mode");
ksmo.op = KVM_S390_MEMOP_SIDA_WRITE;
- rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
+ rv = _vcpu_ioctl(t.kvm_vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EINVAL,
"ioctl does not reject SIDA_WRITE in non-protected mode");
- kvm_vm_free(vm);
+ kvm_vm_free(t.kvm_vm);
+}
+
+int main(int argc, char *argv[])
+{
+ int memop_cap;
+
+ setbuf(stdout, NULL); /* Tell stdout not to buffer its content */
+
+ memop_cap = kvm_check_cap(KVM_CAP_S390_MEM_OP);
+ if (!memop_cap) {
+ print_skip("CAP_S390_MEM_OP not supported");
+ exit(KSFT_SKIP);
+ }
+
+ test_copy();
+ test_errors();
return 0;
}
--
2.32.0
next prev parent reply other threads:[~2022-03-08 12:58 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-08 12:58 [PATCH RESEND v2 0/5] memop selftest for storage key checking Janis Schoetterl-Glausch
2022-03-08 12:58 ` Janis Schoetterl-Glausch [this message]
2022-03-08 12:58 ` [PATCH v2 2/5] KVM: s390: selftests: Add macro as abstraction for MEM_OP Janis Schoetterl-Glausch
2022-03-08 12:58 ` [PATCH v2 3/5] KVM: s390: selftests: Add named stages for memop test Janis Schoetterl-Glausch
2022-03-08 12:58 ` [PATCH v2 4/5] KVM: s390: selftests: Add more copy memop tests Janis Schoetterl-Glausch
2022-03-08 12:58 ` [PATCH v2 5/5] KVM: s390: selftests: Add error " Janis Schoetterl-Glausch
2022-03-08 18:35 ` [PATCH RESEND v2 0/5] memop selftest for storage key checking Christian Borntraeger
2022-03-09 9:05 ` Christian Borntraeger
2022-03-09 10:43 ` Janis Schoetterl-Glausch
-- strict thread matches above, loose matches on Subject: below --
2022-02-11 18:22 [PATCH v4 10/10] KVM: s390: selftests: Test memops with storage keys Janis Schoetterl-Glausch
2022-02-25 15:53 ` [PATCH v2 0/5] memop selftest for storage key checking Janis Schoetterl-Glausch
2022-02-25 15:53 ` [PATCH v2 1/5] KVM: s390: selftests: Split memop tests Janis Schoetterl-Glausch
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