613 lines
22 KiB
C
613 lines
22 KiB
C
/*
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* Arm CPU feature test cases
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*
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* Copyright (c) 2019 Red Hat Inc.
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* Authors:
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* Andrew Jones <drjones@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu/bitops.h"
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#include "libqtest.h"
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#include "qapi/qmp/qdict.h"
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#include "qapi/qmp/qjson.h"
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/*
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* We expect the SVE max-vq to be 16. Also it must be <= 64
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* for our test code, otherwise 'vls' can't just be a uint64_t.
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*/
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#define SVE_MAX_VQ 16
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#define MACHINE "-machine virt,gic-version=max -accel tcg "
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#define MACHINE_KVM "-machine virt,gic-version=max -accel kvm -accel tcg "
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#define QUERY_HEAD "{ 'execute': 'query-cpu-model-expansion', " \
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" 'arguments': { 'type': 'full', "
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#define QUERY_TAIL "}}"
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static bool kvm_enabled(QTestState *qts)
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{
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QDict *resp, *qdict;
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bool enabled;
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resp = qtest_qmp(qts, "{ 'execute': 'query-kvm' }");
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g_assert(qdict_haskey(resp, "return"));
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qdict = qdict_get_qdict(resp, "return");
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g_assert(qdict_haskey(qdict, "enabled"));
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enabled = qdict_get_bool(qdict, "enabled");
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qobject_unref(resp);
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return enabled;
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}
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static QDict *do_query_no_props(QTestState *qts, const char *cpu_type)
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{
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return qtest_qmp(qts, QUERY_HEAD "'model': { 'name': %s }"
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QUERY_TAIL, cpu_type);
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}
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static QDict *do_query(QTestState *qts, const char *cpu_type,
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const char *fmt, ...)
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{
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QDict *resp;
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if (fmt) {
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QDict *args;
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va_list ap;
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va_start(ap, fmt);
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args = qdict_from_vjsonf_nofail(fmt, ap);
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va_end(ap);
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resp = qtest_qmp(qts, QUERY_HEAD "'model': { 'name': %s, "
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"'props': %p }"
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QUERY_TAIL, cpu_type, args);
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} else {
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resp = do_query_no_props(qts, cpu_type);
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}
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return resp;
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}
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static const char *resp_get_error(QDict *resp)
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{
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QDict *qdict;
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g_assert(resp);
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qdict = qdict_get_qdict(resp, "error");
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if (qdict) {
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return qdict_get_str(qdict, "desc");
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}
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return NULL;
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}
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#define assert_error(qts, cpu_type, expected_error, fmt, ...) \
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({ \
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QDict *_resp; \
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const char *_error; \
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\
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_resp = do_query(qts, cpu_type, fmt, ##__VA_ARGS__); \
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g_assert(_resp); \
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_error = resp_get_error(_resp); \
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g_assert(_error); \
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g_assert(g_str_equal(_error, expected_error)); \
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qobject_unref(_resp); \
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})
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static bool resp_has_props(QDict *resp)
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{
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QDict *qdict;
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g_assert(resp);
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if (!qdict_haskey(resp, "return")) {
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return false;
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}
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qdict = qdict_get_qdict(resp, "return");
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if (!qdict_haskey(qdict, "model")) {
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return false;
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}
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qdict = qdict_get_qdict(qdict, "model");
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return qdict_haskey(qdict, "props");
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}
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static QDict *resp_get_props(QDict *resp)
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{
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QDict *qdict;
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g_assert(resp);
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g_assert(resp_has_props(resp));
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qdict = qdict_get_qdict(resp, "return");
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qdict = qdict_get_qdict(qdict, "model");
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qdict = qdict_get_qdict(qdict, "props");
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return qdict;
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}
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static bool resp_get_feature(QDict *resp, const char *feature)
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{
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QDict *props;
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g_assert(resp);
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g_assert(resp_has_props(resp));
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props = resp_get_props(resp);
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g_assert(qdict_get(props, feature));
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return qdict_get_bool(props, feature);
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}
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#define assert_has_feature(qts, cpu_type, feature) \
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({ \
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QDict *_resp = do_query_no_props(qts, cpu_type); \
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g_assert(_resp); \
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g_assert(resp_has_props(_resp)); \
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g_assert(qdict_get(resp_get_props(_resp), feature)); \
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qobject_unref(_resp); \
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})
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#define assert_has_not_feature(qts, cpu_type, feature) \
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({ \
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QDict *_resp = do_query_no_props(qts, cpu_type); \
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g_assert(_resp); \
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g_assert(!resp_has_props(_resp) || \
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!qdict_get(resp_get_props(_resp), feature)); \
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qobject_unref(_resp); \
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})
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#define resp_assert_feature(resp, feature, expected_value) \
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({ \
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QDict *_props; \
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\
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g_assert(_resp); \
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g_assert(resp_has_props(_resp)); \
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_props = resp_get_props(_resp); \
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g_assert(qdict_get(_props, feature)); \
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g_assert(qdict_get_bool(_props, feature) == (expected_value)); \
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})
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#define assert_feature(qts, cpu_type, feature, expected_value) \
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({ \
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QDict *_resp; \
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\
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_resp = do_query_no_props(qts, cpu_type); \
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g_assert(_resp); \
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resp_assert_feature(_resp, feature, expected_value); \
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qobject_unref(_resp); \
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})
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#define assert_set_feature(qts, cpu_type, feature, value) \
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({ \
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const char *_fmt = (value) ? "{ %s: true }" : "{ %s: false }"; \
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QDict *_resp; \
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\
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_resp = do_query(qts, cpu_type, _fmt, feature); \
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g_assert(_resp); \
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resp_assert_feature(_resp, feature, value); \
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qobject_unref(_resp); \
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})
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#define assert_has_feature_enabled(qts, cpu_type, feature) \
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assert_feature(qts, cpu_type, feature, true)
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#define assert_has_feature_disabled(qts, cpu_type, feature) \
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assert_feature(qts, cpu_type, feature, false)
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static void assert_type_full(QTestState *qts)
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{
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const char *error;
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QDict *resp;
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resp = qtest_qmp(qts, "{ 'execute': 'query-cpu-model-expansion', "
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"'arguments': { 'type': 'static', "
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"'model': { 'name': 'foo' }}}");
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g_assert(resp);
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error = resp_get_error(resp);
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g_assert(error);
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g_assert(g_str_equal(error,
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"The requested expansion type is not supported"));
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qobject_unref(resp);
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}
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static void assert_bad_props(QTestState *qts, const char *cpu_type)
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{
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const char *error;
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QDict *resp;
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resp = qtest_qmp(qts, "{ 'execute': 'query-cpu-model-expansion', "
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"'arguments': { 'type': 'full', "
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"'model': { 'name': %s, "
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"'props': false }}}",
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cpu_type);
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g_assert(resp);
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error = resp_get_error(resp);
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g_assert(error);
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g_assert(g_str_equal(error,
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"Invalid parameter type for 'props', expected: dict"));
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qobject_unref(resp);
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}
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static uint64_t resp_get_sve_vls(QDict *resp)
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{
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QDict *props;
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const QDictEntry *e;
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uint64_t vls = 0;
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int n = 0;
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g_assert(resp);
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g_assert(resp_has_props(resp));
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props = resp_get_props(resp);
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for (e = qdict_first(props); e; e = qdict_next(props, e)) {
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if (strlen(e->key) > 3 && !strncmp(e->key, "sve", 3) &&
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g_ascii_isdigit(e->key[3])) {
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char *endptr;
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int bits;
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bits = g_ascii_strtoll(&e->key[3], &endptr, 10);
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if (!bits || *endptr != '\0') {
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continue;
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}
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if (qdict_get_bool(props, e->key)) {
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vls |= BIT_ULL((bits / 128) - 1);
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}
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++n;
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}
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}
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g_assert(n == SVE_MAX_VQ);
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return vls;
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}
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#define assert_sve_vls(qts, cpu_type, expected_vls, fmt, ...) \
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({ \
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QDict *_resp = do_query(qts, cpu_type, fmt, ##__VA_ARGS__); \
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g_assert(_resp); \
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g_assert(resp_has_props(_resp)); \
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g_assert(resp_get_sve_vls(_resp) == expected_vls); \
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qobject_unref(_resp); \
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})
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static void sve_tests_default(QTestState *qts, const char *cpu_type)
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{
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/*
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* With no sve-max-vq or sve<N> properties on the command line
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* the default is to have all vector lengths enabled. This also
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* tests that 'sve' is 'on' by default.
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*/
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assert_sve_vls(qts, cpu_type, BIT_ULL(SVE_MAX_VQ) - 1, NULL);
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/* With SVE off, all vector lengths should also be off. */
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assert_sve_vls(qts, cpu_type, 0, "{ 'sve': false }");
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/* With SVE on, we must have at least one vector length enabled. */
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assert_error(qts, cpu_type, "cannot disable sve128", "{ 'sve128': false }");
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/* Basic enable/disable tests. */
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assert_sve_vls(qts, cpu_type, 0x7, "{ 'sve384': true }");
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assert_sve_vls(qts, cpu_type, ((BIT_ULL(SVE_MAX_VQ) - 1) & ~BIT_ULL(2)),
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"{ 'sve384': false }");
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/*
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* ---------------------------------------------------------------------
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* power-of-two(vq) all-power- can can
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* of-two(< vq) enable disable
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* ---------------------------------------------------------------------
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* vq < max_vq no MUST* yes yes
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* vq < max_vq yes MUST* yes no
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* ---------------------------------------------------------------------
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* vq == max_vq n/a MUST* yes** yes**
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* ---------------------------------------------------------------------
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* vq > max_vq n/a no no yes
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* vq > max_vq n/a yes yes yes
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* ---------------------------------------------------------------------
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*
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* [*] "MUST" means this requirement must already be satisfied,
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* otherwise 'max_vq' couldn't itself be enabled.
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*
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* [**] Not testable with the QMP interface, only with the command line.
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*/
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/* max_vq := 8 */
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assert_sve_vls(qts, cpu_type, 0x8b, "{ 'sve1024': true }");
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/* max_vq := 8, vq < max_vq, !power-of-two(vq) */
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assert_sve_vls(qts, cpu_type, 0x8f,
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"{ 'sve1024': true, 'sve384': true }");
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assert_sve_vls(qts, cpu_type, 0x8b,
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"{ 'sve1024': true, 'sve384': false }");
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/* max_vq := 8, vq < max_vq, power-of-two(vq) */
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assert_sve_vls(qts, cpu_type, 0x8b,
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"{ 'sve1024': true, 'sve256': true }");
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assert_error(qts, cpu_type, "cannot disable sve256",
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"{ 'sve1024': true, 'sve256': false }");
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/* max_vq := 3, vq > max_vq, !all-power-of-two(< vq) */
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assert_error(qts, cpu_type, "cannot disable sve512",
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"{ 'sve384': true, 'sve512': false, 'sve640': true }");
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/*
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* We can disable power-of-two vector lengths when all larger lengths
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* are also disabled. We only need to disable the power-of-two length,
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* as all non-enabled larger lengths will then be auto-disabled.
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*/
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assert_sve_vls(qts, cpu_type, 0x7, "{ 'sve512': false }");
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/* max_vq := 3, vq > max_vq, all-power-of-two(< vq) */
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assert_sve_vls(qts, cpu_type, 0x1f,
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"{ 'sve384': true, 'sve512': true, 'sve640': true }");
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assert_sve_vls(qts, cpu_type, 0xf,
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"{ 'sve384': true, 'sve512': true, 'sve640': false }");
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}
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static void sve_tests_sve_max_vq_8(const void *data)
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{
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QTestState *qts;
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qts = qtest_init(MACHINE "-cpu max,sve-max-vq=8");
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assert_sve_vls(qts, "max", BIT_ULL(8) - 1, NULL);
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/*
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* Disabling the max-vq set by sve-max-vq is not allowed, but
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* of course enabling it is OK.
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*/
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assert_error(qts, "max", "cannot disable sve1024", "{ 'sve1024': false }");
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assert_sve_vls(qts, "max", 0xff, "{ 'sve1024': true }");
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/*
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* Enabling anything larger than max-vq set by sve-max-vq is not
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* allowed, but of course disabling everything larger is OK.
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*/
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assert_error(qts, "max", "cannot enable sve1152", "{ 'sve1152': true }");
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assert_sve_vls(qts, "max", 0xff, "{ 'sve1152': false }");
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/*
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* We can enable/disable non power-of-two lengths smaller than the
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* max-vq set by sve-max-vq, but, while we can enable power-of-two
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* lengths, we can't disable them.
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*/
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assert_sve_vls(qts, "max", 0xff, "{ 'sve384': true }");
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assert_sve_vls(qts, "max", 0xfb, "{ 'sve384': false }");
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assert_sve_vls(qts, "max", 0xff, "{ 'sve256': true }");
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assert_error(qts, "max", "cannot disable sve256", "{ 'sve256': false }");
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qtest_quit(qts);
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}
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static void sve_tests_sve_off(const void *data)
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{
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QTestState *qts;
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qts = qtest_init(MACHINE "-cpu max,sve=off");
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/* SVE is off, so the map should be empty. */
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assert_sve_vls(qts, "max", 0, NULL);
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/* The map stays empty even if we turn lengths off. */
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assert_sve_vls(qts, "max", 0, "{ 'sve128': false }");
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/* It's an error to enable lengths when SVE is off. */
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assert_error(qts, "max", "cannot enable sve128", "{ 'sve128': true }");
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/* With SVE re-enabled we should get all vector lengths enabled. */
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assert_sve_vls(qts, "max", BIT_ULL(SVE_MAX_VQ) - 1, "{ 'sve': true }");
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/* Or enable SVE with just specific vector lengths. */
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assert_sve_vls(qts, "max", 0x3,
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"{ 'sve': true, 'sve128': true, 'sve256': true }");
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qtest_quit(qts);
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}
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static void sve_tests_sve_off_kvm(const void *data)
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{
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QTestState *qts;
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qts = qtest_init(MACHINE_KVM "-cpu max,sve=off");
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/*
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* We don't know if this host supports SVE so we don't
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* attempt to test enabling anything. We only test that
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* everything is disabled (as it should be with sve=off)
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* and that using sve<N>=off to explicitly disable vector
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* lengths is OK too.
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*/
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assert_sve_vls(qts, "max", 0, NULL);
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assert_sve_vls(qts, "max", 0, "{ 'sve128': false }");
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qtest_quit(qts);
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}
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static void test_query_cpu_model_expansion(const void *data)
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{
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QTestState *qts;
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qts = qtest_init(MACHINE "-cpu max");
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/* Test common query-cpu-model-expansion input validation */
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assert_type_full(qts);
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assert_bad_props(qts, "max");
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assert_error(qts, "foo", "The CPU type 'foo' is not a recognized "
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"ARM CPU type", NULL);
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assert_error(qts, "max", "Parameter 'not-a-prop' is unexpected",
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"{ 'not-a-prop': false }");
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assert_error(qts, "host", "The CPU type 'host' requires KVM", NULL);
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/* Test expected feature presence/absence for some cpu types */
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assert_has_feature_enabled(qts, "cortex-a15", "pmu");
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assert_has_not_feature(qts, "cortex-a15", "aarch64");
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/* Enabling and disabling pmu should always work. */
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assert_has_feature_enabled(qts, "max", "pmu");
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assert_set_feature(qts, "max", "pmu", false);
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assert_set_feature(qts, "max", "pmu", true);
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assert_has_not_feature(qts, "max", "kvm-no-adjvtime");
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if (g_str_equal(qtest_get_arch(), "aarch64")) {
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assert_has_feature_enabled(qts, "max", "aarch64");
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assert_has_feature_enabled(qts, "max", "sve");
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assert_has_feature_enabled(qts, "max", "sve128");
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assert_has_feature_enabled(qts, "cortex-a57", "pmu");
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assert_has_feature_enabled(qts, "cortex-a57", "aarch64");
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sve_tests_default(qts, "max");
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/* Test that features that depend on KVM generate errors without. */
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assert_error(qts, "max",
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"'aarch64' feature cannot be disabled "
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"unless KVM is enabled and 32-bit EL1 "
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"is supported",
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"{ 'aarch64': false }");
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}
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qtest_quit(qts);
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}
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|
static void test_query_cpu_model_expansion_kvm(const void *data)
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|
{
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QTestState *qts;
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|
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qts = qtest_init(MACHINE_KVM "-cpu max");
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|
|
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/*
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* These tests target the 'host' CPU type, so KVM must be enabled.
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|
*/
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if (!kvm_enabled(qts)) {
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qtest_quit(qts);
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return;
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}
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|
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/* Enabling and disabling kvm-no-adjvtime should always work. */
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assert_has_feature_disabled(qts, "host", "kvm-no-adjvtime");
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assert_set_feature(qts, "host", "kvm-no-adjvtime", true);
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assert_set_feature(qts, "host", "kvm-no-adjvtime", false);
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|
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if (g_str_equal(qtest_get_arch(), "aarch64")) {
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bool kvm_supports_sve;
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char max_name[8], name[8];
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uint32_t max_vq, vq;
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|
uint64_t vls;
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|
QDict *resp;
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char *error;
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|
|
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assert_has_feature_enabled(qts, "host", "aarch64");
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|
|
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/* Enabling and disabling pmu should always work. */
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assert_has_feature_enabled(qts, "host", "pmu");
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assert_set_feature(qts, "host", "pmu", false);
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|
assert_set_feature(qts, "host", "pmu", true);
|
|
|
|
assert_error(qts, "cortex-a15",
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|
"We cannot guarantee the CPU type 'cortex-a15' works "
|
|
"with KVM on this host", NULL);
|
|
|
|
assert_has_feature(qts, "host", "sve");
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|
resp = do_query_no_props(qts, "host");
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|
kvm_supports_sve = resp_get_feature(resp, "sve");
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|
vls = resp_get_sve_vls(resp);
|
|
qobject_unref(resp);
|
|
|
|
if (kvm_supports_sve) {
|
|
g_assert(vls != 0);
|
|
max_vq = 64 - __builtin_clzll(vls);
|
|
sprintf(max_name, "sve%d", max_vq * 128);
|
|
|
|
/* Enabling a supported length is of course fine. */
|
|
assert_sve_vls(qts, "host", vls, "{ %s: true }", max_name);
|
|
|
|
/* Get the next supported length smaller than max-vq. */
|
|
vq = 64 - __builtin_clzll(vls & ~BIT_ULL(max_vq - 1));
|
|
if (vq) {
|
|
/*
|
|
* We have at least one length smaller than max-vq,
|
|
* so we can disable max-vq.
|
|
*/
|
|
assert_sve_vls(qts, "host", (vls & ~BIT_ULL(max_vq - 1)),
|
|
"{ %s: false }", max_name);
|
|
|
|
/*
|
|
* Smaller, supported vector lengths cannot be disabled
|
|
* unless all larger, supported vector lengths are also
|
|
* disabled.
|
|
*/
|
|
sprintf(name, "sve%d", vq * 128);
|
|
error = g_strdup_printf("cannot disable %s", name);
|
|
assert_error(qts, "host", error,
|
|
"{ %s: true, %s: false }",
|
|
max_name, name);
|
|
g_free(error);
|
|
}
|
|
|
|
/*
|
|
* The smallest, supported vector length is required, because
|
|
* we need at least one vector length enabled.
|
|
*/
|
|
vq = __builtin_ffsll(vls);
|
|
sprintf(name, "sve%d", vq * 128);
|
|
error = g_strdup_printf("cannot disable %s", name);
|
|
assert_error(qts, "host", error, "{ %s: false }", name);
|
|
g_free(error);
|
|
|
|
/* Get an unsupported length. */
|
|
for (vq = 1; vq <= max_vq; ++vq) {
|
|
if (!(vls & BIT_ULL(vq - 1))) {
|
|
break;
|
|
}
|
|
}
|
|
if (vq <= SVE_MAX_VQ) {
|
|
sprintf(name, "sve%d", vq * 128);
|
|
error = g_strdup_printf("cannot enable %s", name);
|
|
assert_error(qts, "host", error, "{ %s: true }", name);
|
|
g_free(error);
|
|
}
|
|
} else {
|
|
g_assert(vls == 0);
|
|
}
|
|
} else {
|
|
assert_has_not_feature(qts, "host", "aarch64");
|
|
assert_has_not_feature(qts, "host", "pmu");
|
|
assert_has_not_feature(qts, "host", "sve");
|
|
}
|
|
|
|
qtest_quit(qts);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
g_test_init(&argc, &argv, NULL);
|
|
|
|
qtest_add_data_func("/arm/query-cpu-model-expansion",
|
|
NULL, test_query_cpu_model_expansion);
|
|
|
|
/*
|
|
* For now we only run KVM specific tests with AArch64 QEMU in
|
|
* order avoid attempting to run an AArch32 QEMU with KVM on
|
|
* AArch64 hosts. That won't work and isn't easy to detect.
|
|
*/
|
|
if (g_str_equal(qtest_get_arch(), "aarch64")) {
|
|
qtest_add_data_func("/arm/kvm/query-cpu-model-expansion",
|
|
NULL, test_query_cpu_model_expansion_kvm);
|
|
}
|
|
|
|
if (g_str_equal(qtest_get_arch(), "aarch64")) {
|
|
qtest_add_data_func("/arm/max/query-cpu-model-expansion/sve-max-vq-8",
|
|
NULL, sve_tests_sve_max_vq_8);
|
|
qtest_add_data_func("/arm/max/query-cpu-model-expansion/sve-off",
|
|
NULL, sve_tests_sve_off);
|
|
qtest_add_data_func("/arm/kvm/query-cpu-model-expansion/sve-off",
|
|
NULL, sve_tests_sve_off_kvm);
|
|
}
|
|
|
|
return g_test_run();
|
|
}
|