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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;
}
typedef struct AccelType {
const char *opt_name;
const char *name;
int (*available)(void);
int (*init)(MachineClass *mc);
bool *allowed;
} AccelType;
static AccelType 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 },
};
/* Lookup AccelType from opt_name. Returns NULL if not found */
static AccelType *accel_find(const char *opt_name)
{
int i;
for (i = 0; i < ARRAY_SIZE(accel_list); i++) {
AccelType *acc = &accel_list[i];
if (acc->opt_name && strcmp(acc->opt_name, opt_name) == 0) {
return acc;
}
}
return NULL;
}
int configure_accelerator(MachineClass *mc)
{
const char *p;
char buf[10];
int ret;
bool accel_initialised = false;
bool init_failed = false;
AccelType *acc = NULL;
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, ':');
acc = accel_find(buf);
if (!acc) {
fprintf(stderr, "\"%s\" accelerator does not exist.\n", buf);
continue;
}
if (!acc->available()) {
printf("%s not supported for this target\n",
acc->name);
continue;
}
*(acc->allowed) = true;
ret = acc->init(mc);
if (ret < 0) {
init_failed = true;
fprintf(stderr, "failed to initialize %s: %s\n",
acc->name,
strerror(-ret));
*(acc->allowed) = false;
} else {
accel_initialised = true;
}
}
if (!accel_initialised) {
if (!init_failed) {
fprintf(stderr, "No accelerator found!\n");
}
exit(1);
}
if (init_failed) {
fprintf(stderr, "Back to %s accelerator.\n", acc->name);
}
return !accel_initialised;
}
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