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-rw-r--r--accel.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/accel.c b/accel.c
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+/*
+ * QEMU System Emulator, accelerator interfaces
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2014 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "sysemu/accel.h"
+#include "qemu-common.h"
+#include "sysemu/arch_init.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/kvm.h"
+#include "sysemu/qtest.h"
+#include "hw/xen/xen.h"
+
+int tcg_tb_size;
+static bool tcg_allowed = true;
+
+static int tcg_init(MachineClass *mc)
+{
+ tcg_exec_init(tcg_tb_size * 1024 * 1024);
+ return 0;
+}
+
+static struct {
+ const char *opt_name;
+ const char *name;
+ int (*available)(void);
+ int (*init)(MachineClass *mc);
+ bool *allowed;
+} accel_list[] = {
+ { "tcg", "tcg", tcg_available, tcg_init, &tcg_allowed },
+ { "xen", "Xen", xen_available, xen_init, &xen_allowed },
+ { "kvm", "KVM", kvm_available, kvm_init, &kvm_allowed },
+ { "qtest", "QTest", qtest_available, qtest_init_accel, &qtest_allowed },
+};
+
+int configure_accelerator(MachineClass *mc)
+{
+ const char *p;
+ char buf[10];
+ int i, ret;
+ bool accel_initialised = false;
+ bool init_failed = false;
+
+ p = qemu_opt_get(qemu_get_machine_opts(), "accel");
+ if (p == NULL) {
+ /* Use the default "accelerator", tcg */
+ p = "tcg";
+ }
+
+ while (!accel_initialised && *p != '\0') {
+ if (*p == ':') {
+ p++;
+ }
+ p = get_opt_name(buf, sizeof(buf), p, ':');
+ for (i = 0; i < ARRAY_SIZE(accel_list); i++) {
+ if (strcmp(accel_list[i].opt_name, buf) == 0) {
+ if (!accel_list[i].available()) {
+ printf("%s not supported for this target\n",
+ accel_list[i].name);
+ break;
+ }
+ *(accel_list[i].allowed) = true;
+ ret = accel_list[i].init(mc);
+ if (ret < 0) {
+ init_failed = true;
+ fprintf(stderr, "failed to initialize %s: %s\n",
+ accel_list[i].name,
+ strerror(-ret));
+ *(accel_list[i].allowed) = false;
+ } else {
+ accel_initialised = true;
+ }
+ break;
+ }
+ }
+ if (i == ARRAY_SIZE(accel_list)) {
+ fprintf(stderr, "\"%s\" accelerator does not exist.\n", buf);
+ }
+ }
+
+ if (!accel_initialised) {
+ if (!init_failed) {
+ fprintf(stderr, "No accelerator found!\n");
+ }
+ exit(1);
+ }
+
+ if (init_failed) {
+ fprintf(stderr, "Back to %s accelerator.\n", accel_list[i].name);
+ }
+
+ return !accel_initialised;
+}