KVM: s390: selftests: Add regression tests for KMCTR, KMF, KMO and PCC crypto subfunc...

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@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>
Link: https://lore.kernel.org/r/20240823130947.38323-4-hari55@linux.ibm.com
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-ID: <20240823130947.38323-4-hari55@linux.ibm.com>

diff --git a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
index 96e7ca07220f5069fd45e5235abd3ddd17f3ce69..28faceeaf089318e88e4e69c07729a84e194d3c3 100644 (file)
--- a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
+++ b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c
@@ -33,6 +33,50 @@ 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 */
 static void test_prno_asm_block(u8 (*query)[16])
 {
@@ -97,6 +141,11 @@ 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 },
        /* MSA8 - Facility bit 146 */