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Diffstat (limited to 'vl.c')
-rw-r--r--vl.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/vl.c b/vl.c
index 9b2bf00a7..108579419 100644
--- a/vl.c
+++ b/vl.c
@@ -1916,6 +1916,7 @@ DriveInfo *drive_init(QemuOpts *opts, void *opaque,
int max_devs;
int index;
int cache;
+ int aio = 0;
int bdrv_flags, onerror;
const char *devaddr;
DriveInfo *dinfo;
@@ -2049,6 +2050,19 @@ DriveInfo *drive_init(QemuOpts *opts, void *opaque,
}
}
+#ifdef CONFIG_LINUX_AIO
+ if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
+ if (!strcmp(buf, "threads"))
+ aio = 0;
+ else if (!strcmp(buf, "native"))
+ aio = 1;
+ else {
+ fprintf(stderr, "qemu: invalid aio option\n");
+ return NULL;
+ }
+ }
+#endif
+
if ((buf = qemu_opt_get(opts, "format")) != NULL) {
if (strcmp(buf, "?") == 0) {
fprintf(stderr, "qemu: Supported formats:");
@@ -2218,11 +2232,19 @@ DriveInfo *drive_init(QemuOpts *opts, void *opaque,
bdrv_flags |= BDRV_O_NOCACHE;
else if (cache == 2) /* write-back */
bdrv_flags |= BDRV_O_CACHE_WB;
+
+ if (aio == 1) {
+ bdrv_flags |= BDRV_O_NATIVE_AIO;
+ } else {
+ bdrv_flags &= ~BDRV_O_NATIVE_AIO;
+ }
+
if (bdrv_open2(dinfo->bdrv, file, bdrv_flags, drv) < 0) {
fprintf(stderr, "qemu: could not open disk image %s\n",
file);
return NULL;
}
+
if (bdrv_key_required(dinfo->bdrv))
autostart = 0;
*fatal_error = 0;