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[v1,2/5] KVM: s390: selftests: Add regression tests for PRNO, KDSA and KMA crypto subfunctions

Message ID 20240819140040.1087552-3-hari55@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series KVM: s390: selftests: Add regression tests for CPU subfunctions | expand

Commit Message

Hariharan Mari Aug. 19, 2024, 1:54 p.m. UTC 
Extend the existing regression test framework for s390x CPU subfunctions
to include tests for the PRNO (Perform Random Number Operation), KDSA
(Compute Digital Signature Authentication) and KMA (Cipher Message with
Authentication) crypto functions.

The test procedure follows the established pattern:

1. Obtain KVM_S390_VM_CPU_MACHINE_SUBFUNC attribute for the VM.
2. Execute PRNO, KDSA and KMA instructions.
3. Compare KVM-reported results with direct instruction execution results.

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>
---
 .../kvm/s390x/cpumodel_subfuncs_test.c        | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
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Patch

diff --git a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
index 45add61cba91..c2ae5b270f50 100644
--- a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
+++ b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
@@ -37,6 +37,48 @@  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 Perform Random Number Operation (PRNO) CPU subfunction's
+ * ASM block
+ */
+static void test_prno_asm_block(u8 (*query)[16])
+{
+	asm volatile("	la	%%r1,%[query]\n"
+			"	xgr	%%r0,%%r0\n"
+			"	.insn	rre,0xb93c0000,2,4\n"
+			: [query] "=R" (*query)
+			:
+			: "cc", "r0", "r1");
+}
+
+/*
+ * Testing Crypto Cipher Message with Authentication (KMA) CPU subfunction's
+ * ASM block
+ */
+static void test_kma_asm_block(u8 (*query)[16])
+{
+	asm volatile("	la	%%r1,%[query]\n"
+			"	xgr	%%r0,%%r0\n"
+			"	.insn	rrf,0xb9290000,2,4,6,0\n"
+			: [query] "=R" (*query)
+			:
+			: "cc", "r0", "r1");
+}
+
+/*
+ * Testing Crypto Compute Digital Signature Authentication (KDSA) CPU
+ * subfunction's ASM block
+ */
+static void test_kdsa_asm_block(u8 (*query)[16])
+{
+	asm volatile("	la	%%r1,%[query]\n"
+			"	xgr	%%r0,%%r0\n"
+			"	.insn	rre,0xb93a0000,0,2\n"
+			: [query] "=R" (*query)
+			:
+			: "cc", "r0", "r1");
+}
+
 /*
  * Testing Sort Lists (SORTL) CPU subfunction's ASM block
  */
@@ -72,6 +114,15 @@  struct testdef {
 	testfunc_t test;
 	bool facility_bit;
 } testlist[] = {
+	/* MSA5 - Facility bit 57 */
+	{ "PPNO", cpu_subfunc.ppno, sizeof(cpu_subfunc.ppno),
+		test_prno_asm_block, 57 },
+	/* MSA8 - Facility bit 146 */
+	{ "KMA", cpu_subfunc.kma, sizeof(cpu_subfunc.kma),
+		test_kma_asm_block, 146 },
+	/* MSA9 - Facility bit 155 */
+	{ "KDSA", cpu_subfunc.kdsa, sizeof(cpu_subfunc.kdsa),
+		test_kdsa_asm_block, 155 },
 	/* SORTL - Facility bit 150 */
 	{ "SORTL", cpu_subfunc.sortl, sizeof(cpu_subfunc.sortl),
 		test_sortl_asm_block, 150 },