linux-kernel - [PATCH v2 3/5] KVM: s390: selftests: Add regression tests for KMCTR, KMF, KMO and PCC crypto subfunctions

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Message-ID: <20240820065623.1140399-4-hari55@linux.ibm.com>
Date: Tue, 20 Aug 2024 08:48:35 +0200
From: Hariharan Mari <hari55@...ux.ibm.com>
To: linux-kselftest@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org, shuah@...nel.org,
        frankja@...ux.ibm.com, borntraeger@...ux.ibm.com,
        imbrenda@...ux.ibm.com, david@...hat.com, pbonzini@...hat.com,
        schlameuss@...ux.ibm.com
Subject: [PATCH v2 3/5] KVM: s390: selftests: Add regression tests for KMCTR, KMF, KMO and PCC crypto subfunctions

Extend the existing regression test framework for s390x CPU subfunctions
to include tests for the KMCTR (Cipher Message with Counter) KMO
(Cipher Message with Output Feedback), KMF (Cipher Message with Cipher
Feedback) and PCC (Perform Cryptographic Computation) crypto functions.

The test procedure follows the established pattern.

Suggested-by: Janosch Frank <frankja@...ux.ibm.com>
Signed-off-by: Hariharan Mari <hari55@...ux.ibm.com>
Reviewed-by: Janosch Frank <frankja@...ux.ibm.com>
---
 .../kvm/s390x/cpumodel_subfuncs_test.c        | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
index 2489e10d3cc2..1fe4fc709afc 100644
--- a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
+++ b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
@@ -37,6 +37,62 @@ 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 Cipher Message with Counter (KMCTR) CPU subfunction's ASM
+ * block
+ */
+static void test_kmctr_asm_block(u8 (*query)[16])
+{
+	asm volatile("	la	%%r1,%[query]\n"
+			"	xgr	%%r0,%%r0\n"
+			"	.insn	rrf,0xb92d0000,2,4,6,0\n"
+			: [query] "=R" (*query)
+			:
+			: "cc", "r0", "r1");
+}
+
+/*
+ * Testing Crypto Cipher Message with Cipher Feedback (KMF) CPU subfunction's
+ * ASM block
+ */
+static void test_kmf_asm_block(u8 (*query)[16])
+{
+	asm volatile("	la	%%r1,%[query]\n"
+			"	xgr	%%r0,%%r0\n"
+			"	.insn	rre,0xb92a0000,2,4\n"
+			: [query] "=R" (*query)
+			:
+			: "cc", "r0", "r1");
+}
+
+/*
+ * Testing Crypto Cipher Message with Output Feedback (KMO) CPU subfunction's
+ * ASM block
+ */
+static void test_kmo_asm_block(u8 (*query)[16])
+{
+	asm volatile("	la	%%r1,%[query]\n"
+			"	xgr	%%r0,%%r0\n"
+			"	.insn	rre,0xb92b0000,2,4\n"
+			: [query] "=R" (*query)
+			:
+			: "cc", "r0", "r1");
+}
+
+/*
+ * Testing Crypto Perform Cryptographic Computation (PCC) CPU subfunction's
+ * ASM block
+ */
+static void test_pcc_asm_block(u8 (*query)[16])
+{
+	asm volatile("	la	%%r1,%[query]\n"
+			"	xgr	%%r0,%%r0\n"
+			"	.insn	rre,0xb92c0000,0,0\n"
+			: [query] "=R" (*query)
+			:
+			: "cc", "r0", "r1");
+}
+
 /*
  * Testing Crypto Perform Random Number Operation (PRNO) CPU subfunction's
  * ASM block
@@ -114,6 +170,15 @@ struct testdef {
 	testfunc_t test;
 	int facility_bit;
 } testlist[] = {
+	/* 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 },
+	{ "KMO", cpu_subfunc.kmo, sizeof(cpu_subfunc.kmo),
+		test_kmo_asm_block, 77 },
+	{ "PCC", cpu_subfunc.pcc, sizeof(cpu_subfunc.pcc),
+		test_pcc_asm_block, 77 },
 	/* MSA5 - Facility bit 57 */
 	{ "PPNO", cpu_subfunc.ppno, sizeof(cpu_subfunc.ppno),
 		test_prno_asm_block, 57 },
-- 
2.45.2