Currently when we run guest code to validate that the values we wrote to the registers are seen by the guest we assert that these values match using a KVM selftests level assert, resulting in unclear diagnostics if the test fails. Replace this assert with reporting a kselftest test per register.
In order to support getting the names of the registers we repaint the array of ID_ registers to store the names and open code the rest.
Signed-off-by: Mark Brown broonie@kernel.org --- tools/testing/selftests/kvm/arm64/set_id_regs.c | 74 +++++++++++++++++++------ 1 file changed, 57 insertions(+), 17 deletions(-)
diff --git a/tools/testing/selftests/kvm/arm64/set_id_regs.c b/tools/testing/selftests/kvm/arm64/set_id_regs.c index 5e24f77868b5..7a759e976c2c 100644 --- a/tools/testing/selftests/kvm/arm64/set_id_regs.c +++ b/tools/testing/selftests/kvm/arm64/set_id_regs.c @@ -40,6 +40,7 @@ struct reg_ftr_bits { };
struct test_feature_reg { + const char *name; uint32_t reg; const struct reg_ftr_bits *ftr_bits; }; @@ -218,24 +219,25 @@ static const struct reg_ftr_bits ftr_id_aa64zfr0_el1[] = {
#define TEST_REG(id, table) \ { \ - .reg = id, \ + .name = #id, \ + .reg = SYS_ ## id, \ .ftr_bits = &((table)[0]), \ }
static struct test_feature_reg test_regs[] = { - TEST_REG(SYS_ID_AA64DFR0_EL1, ftr_id_aa64dfr0_el1), - TEST_REG(SYS_ID_DFR0_EL1, ftr_id_dfr0_el1), - TEST_REG(SYS_ID_AA64ISAR0_EL1, ftr_id_aa64isar0_el1), - TEST_REG(SYS_ID_AA64ISAR1_EL1, ftr_id_aa64isar1_el1), - TEST_REG(SYS_ID_AA64ISAR2_EL1, ftr_id_aa64isar2_el1), - TEST_REG(SYS_ID_AA64ISAR3_EL1, ftr_id_aa64isar3_el1), - TEST_REG(SYS_ID_AA64PFR0_EL1, ftr_id_aa64pfr0_el1), - TEST_REG(SYS_ID_AA64PFR1_EL1, ftr_id_aa64pfr1_el1), - TEST_REG(SYS_ID_AA64MMFR0_EL1, ftr_id_aa64mmfr0_el1), - TEST_REG(SYS_ID_AA64MMFR1_EL1, ftr_id_aa64mmfr1_el1), - TEST_REG(SYS_ID_AA64MMFR2_EL1, ftr_id_aa64mmfr2_el1), - TEST_REG(SYS_ID_AA64MMFR3_EL1, ftr_id_aa64mmfr3_el1), - TEST_REG(SYS_ID_AA64ZFR0_EL1, ftr_id_aa64zfr0_el1), + TEST_REG(ID_AA64DFR0_EL1, ftr_id_aa64dfr0_el1), + TEST_REG(ID_DFR0_EL1, ftr_id_dfr0_el1), + TEST_REG(ID_AA64ISAR0_EL1, ftr_id_aa64isar0_el1), + TEST_REG(ID_AA64ISAR1_EL1, ftr_id_aa64isar1_el1), + TEST_REG(ID_AA64ISAR2_EL1, ftr_id_aa64isar2_el1), + TEST_REG(ID_AA64ISAR3_EL1, ftr_id_aa64isar3_el1), + TEST_REG(ID_AA64PFR0_EL1, ftr_id_aa64pfr0_el1), + TEST_REG(ID_AA64PFR1_EL1, ftr_id_aa64pfr1_el1), + TEST_REG(ID_AA64MMFR0_EL1, ftr_id_aa64mmfr0_el1), + TEST_REG(ID_AA64MMFR1_EL1, ftr_id_aa64mmfr1_el1), + TEST_REG(ID_AA64MMFR2_EL1, ftr_id_aa64mmfr2_el1), + TEST_REG(ID_AA64MMFR3_EL1, ftr_id_aa64mmfr3_el1), + TEST_REG(ID_AA64ZFR0_EL1, ftr_id_aa64zfr0_el1), };
#define GUEST_REG_SYNC(id) GUEST_SYNC_ARGS(0, id, read_sysreg_s(id), 0, 0); @@ -265,6 +267,34 @@ static void guest_code(void) GUEST_DONE(); }
+#define GUEST_READ_TEST (ARRAY_SIZE(test_regs) + 6) + +static const char *get_reg_name(u64 id) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(test_regs); i++) + if (test_regs[i].reg == id) + return test_regs[i].name; + + switch (id) { + case SYS_MPIDR_EL1: + return "MPIDR_EL1"; + case SYS_CLIDR_EL1: + return "CLIDR_EL1"; + case SYS_CTR_EL0: + return "CTR_EL0"; + case SYS_MIDR_EL1: + return "MIDR_EL1"; + case SYS_REVIDR_EL1: + return "REVIDR_EL1"; + case SYS_AIDR_EL1: + return "AIDR_EL1"; + default: + TEST_FAIL("Unknown register"); + } +} + /* Return a safe value to a given ftr_bits an ftr value */ uint64_t get_safe_value(const struct reg_ftr_bits *ftr_bits, uint64_t ftr) { @@ -635,6 +665,8 @@ static void test_guest_reg_read(struct kvm_vcpu *vcpu) { bool done = false; struct ucall uc; + uint64_t reg_id, expected_val, guest_val; + bool match;
while (!done) { vcpu_run(vcpu); @@ -645,8 +677,16 @@ static void test_guest_reg_read(struct kvm_vcpu *vcpu) break; case UCALL_SYNC: /* Make sure the written values are seen by guest */ - TEST_ASSERT_EQ(test_reg_vals[encoding_to_range_idx(uc.args[2])], - uc.args[3]); + reg_id = uc.args[2]; + guest_val = uc.args[3]; + expected_val = test_reg_vals[encoding_to_range_idx(reg_id)]; + match = expected_val == guest_val; + if (!match) + ksft_print_msg("%lx != %lx\n", + expected_val, guest_val); + ksft_test_result(match, + "%s value seen in guest\n", + get_reg_name(reg_id)); break; case UCALL_DONE: done = true; @@ -786,7 +826,7 @@ int main(void)
ksft_print_header();
- test_cnt = 3 + MPAM_IDREG_TEST + MTE_IDREG_TEST; + test_cnt = 3 + MPAM_IDREG_TEST + MTE_IDREG_TEST + GUEST_READ_TEST; for (i = 0; i < ARRAY_SIZE(test_regs); i++) for (j = 0; test_regs[i].ftr_bits[j].type != FTR_END; j++) test_cnt++;