[PATCH v3 4/5] KVM: s390: selftests: Add regression tests for KMAC, KMC, KM, KIMD and KLMD crypto subfunctions

Hariharan Mari
2024-08-23T13:10:08Z

Extend the existing regression test framework for s390x CPU subfunctions
to include tests for the KMAC (Compute Message Authentication Code),
KMC (Cipher Message with Chaining), KM (Cipher Message) KIMD (Compute
Intermediate Message Digest) and KLMD (Compute Last Message Digest)
crypto functions.

The test procedure follows the established pattern.

Suggested-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Hariharan Mari <hari55@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
---
.../kvm/s390x/cpumodel_subfuncs_test.c | 61 +++++++++++++++++++
1 file changed, 61 insertions(+)

diff --git a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
index 28faceeaf089..fe45fb131583 100644
--- a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
+++ b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
@@ -33,6 +33,61 @@ static void get_cpu_machine_subfuntions(struct kvm_vm *vm,
TEST_ASSERT(!r, "Get cpu subfunctions failed r=%d errno=%d", r, errno);
}

+/* Testing Crypto Compute Message Authentication Code (KMAC) CPU subfunction's ASM block */
+static void test_kmac_asm_block(u8 (*query)[16])
+{
+ asm volatile(" la %%r1,%[query]\n"
+ " xgr %%r0,%%r0\n"
+ " .insn rre,0xb91e0000,0,2\n"
+ : [query] "=R" (*query)
+ :
+ : "cc", "r0", "r1");
+}
+
+/* Testing Crypto Cipher Message with Chaining (KMC) CPU subfunction's ASM block */
+static void test_kmc_asm_block(u8 (*query)[16])
+{
+ asm volatile(" la %%r1,%[query]\n"
+ " xgr %%r0,%%r0\n"
+ " .insn rre,0xb92f0000,2,4\n"
+ : [query] "=R" (*query)
+ :
+ : "cc", "r0", "r1");
+}
+
+/* Testing Crypto Cipher Message (KM) CPU subfunction's ASM block */
+static void test_km_asm_block(u8 (*query)[16])
+{
+ asm volatile(" la %%r1,%[query]\n"
+ " xgr %%r0,%%r0\n"
+ " .insn rre,0xb92e0000,2,4\n"
+ : [query] "=R" (*query)
+ :
+ : "cc", "r0", "r1");
+}
+
+/* Testing Crypto Compute Intermediate Message Digest (KIMD) CPU subfunction's ASM block */
+static void test_kimd_asm_block(u8 (*query)[16])
+{
+ asm volatile(" la %%r1,%[query]\n"
+ " xgr %%r0,%%r0\n"
+ " .insn rre,0xb93e0000,0,2\n"
+ : [query] "=R" (*query)
+ :
+ : "cc", "r0", "r1");
+}
+
+/* Testing Crypto Compute Last Message Digest (KLMD) CPU subfunction's ASM block */
+static void test_klmd_asm_block(u8 (*query)[16])
+{
+ asm volatile(" la %%r1,%[query]\n"
+ " xgr %%r0,%%r0\n"
+ " .insn rre,0xb93f0000,0,2\n"
+ : [query] "=R" (*query)
+ :
+ : "cc", "r0", "r1");
+}
+
/* Testing Crypto Cipher Message with Counter (KMCTR) CPU subfunction's ASM block */
static void test_kmctr_asm_block(u8 (*query)[16])
{
@@ -141,6 +196,12 @@ struct testdef {
testfunc_t test;
int facility_bit;
} testlist[] = {
+ /* MSA - Facility bit 17 */
+ { "KMAC", cpu_subfunc.kmac, sizeof(cpu_subfunc.kmac), test_kmac_asm_block, 17 },
+ { "KMC", cpu_subfunc.kmc, sizeof(cpu_subfunc.kmc), test_kmc_asm_block, 17 },
+ { "KM", cpu_subfunc.km, sizeof(cpu_subfunc.km), test_km_asm_block, 17 },
+ { "KIMD", cpu_subfunc.kimd, sizeof(cpu_subfunc.kimd), test_kimd_asm_block, 17 },
+ { "KLMD", cpu_subfunc.klmd, sizeof(cpu_subfunc.klmd), test_klmd_asm_block, 17 },
/* MSA - Facility bit 77 */
{ "KMCTR", cpu_subfunc.kmctr, sizeof(cpu_subfunc.kmctr), test_kmctr_asm_block, 77 },
{ "KMF", cpu_subfunc.kmf, sizeof(cpu_subfunc.kmf), test_kmf_asm_block, 77 },
--
2.45.2