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Diffstat (limited to 'tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c')
| -rw-r--r-- | tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c new file mode 100644 index 000000000000..27255880dabd --- /dev/null +++ b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c @@ -0,0 +1,301 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright IBM Corp. 2024 + * + * Authors: + * Hariharan Mari <hari55@linux.ibm.com> + * + * The tests compare the result of the KVM ioctl for obtaining CPU subfunction data with those + * from an ASM block performing the same CPU subfunction. Currently KVM doesn't mask instruction + * query data reported via the CPU Model, allowing us to directly compare it with the data + * acquired through executing the queries in the test. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include "facility.h" + +#include "kvm_util.h" + +#define PLO_FUNCTION_MAX 256 + +/* Query available CPU subfunctions */ +struct kvm_s390_vm_cpu_subfunc cpu_subfunc; + +static void get_cpu_machine_subfuntions(struct kvm_vm *vm, + struct kvm_s390_vm_cpu_subfunc *cpu_subfunc) +{ + int r; + + r = __kvm_device_attr_get(vm->fd, KVM_S390_VM_CPU_MODEL, + KVM_S390_VM_CPU_MACHINE_SUBFUNC, cpu_subfunc); + + TEST_ASSERT(!r, "Get cpu subfunctions failed r=%d errno=%d", r, errno); +} + +static inline int plo_test_bit(unsigned char nr) +{ + unsigned long function = nr | 0x100; + int cc; + + asm volatile(" lgr 0,%[function]\n" + /* Parameter registers are ignored for "test bit" */ + " plo 0,0,0,0(0)\n" + " ipm %0\n" + " srl %0,28\n" + : "=d" (cc) + : [function] "d" (function) + : "cc", "0"); + return cc == 0; +} + +/* Testing Perform Locked Operation (PLO) CPU subfunction's ASM block */ +static void test_plo_asm_block(u8 (*query)[32]) +{ + for (int i = 0; i < PLO_FUNCTION_MAX; ++i) { + if (plo_test_bit(i)) + (*query)[i >> 3] |= 0x80 >> (i & 7); + } +} + +/* 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]) +{ + 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]) +{ + 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 */ +static void test_sortl_asm_block(u8 (*query)[32]) +{ + asm volatile(" lghi 0,0\n" + " la 1,%[query]\n" + " .insn rre,0xb9380000,2,4\n" + : [query] "=R" (*query) + : + : "cc", "0", "1"); +} + +/* Testing Deflate Conversion Call (DFLTCC) CPU subfunction's ASM block */ +static void test_dfltcc_asm_block(u8 (*query)[32]) +{ + asm volatile(" lghi 0,0\n" + " la 1,%[query]\n" + " .insn rrf,0xb9390000,2,4,6,0\n" + : [query] "=R" (*query) + : + : "cc", "0", "1"); +} + +/* + * Testing Perform Function with Concurrent Results (PFCR) + * CPU subfunctions's ASM block + */ +static void test_pfcr_asm_block(u8 (*query)[16]) +{ + asm volatile(" lghi 0,0\n" + " .insn rsy,0xeb0000000016,0,0,%[query]\n" + : [query] "=QS" (*query) + : + : "cc", "0"); +} + +typedef void (*testfunc_t)(u8 (*array)[]); + +struct testdef { + const char *subfunc_name; + u8 *subfunc_array; + size_t array_size; + testfunc_t test; + int facility_bit; +} testlist[] = { + /* + * PLO was introduced in the very first 64-bit machine generation. + * Hence it is assumed PLO is always installed in Z Arch. + */ + { "PLO", cpu_subfunc.plo, sizeof(cpu_subfunc.plo), test_plo_asm_block, 1 }, + /* 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 }, + { "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 */ + { "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 }, + /* DFLTCC - Facility bit 151 */ + { "DFLTCC", cpu_subfunc.dfltcc, sizeof(cpu_subfunc.dfltcc), test_dfltcc_asm_block, 151 }, + /* Concurrent-function facility - Facility bit 201 */ + { "PFCR", cpu_subfunc.pfcr, sizeof(cpu_subfunc.pfcr), test_pfcr_asm_block, 201 }, +}; + +int main(int argc, char *argv[]) +{ + struct kvm_vm *vm; + int idx; + + ksft_print_header(); + + vm = vm_create(1); + + memset(&cpu_subfunc, 0, sizeof(cpu_subfunc)); + get_cpu_machine_subfuntions(vm, &cpu_subfunc); + + ksft_set_plan(ARRAY_SIZE(testlist)); + for (idx = 0; idx < ARRAY_SIZE(testlist); idx++) { + if (test_facility(testlist[idx].facility_bit)) { + u8 *array = malloc(testlist[idx].array_size); + + testlist[idx].test((u8 (*)[testlist[idx].array_size])array); + + TEST_ASSERT_EQ(memcmp(testlist[idx].subfunc_array, + array, testlist[idx].array_size), 0); + + ksft_test_result_pass("%s\n", testlist[idx].subfunc_name); + free(array); + } else { + ksft_test_result_skip("%s feature is not avaialable\n", + testlist[idx].subfunc_name); + } + } + + kvm_vm_free(vm); + ksft_finished(); +} |