This is a cut-down version of the SeaBIOS configuration optimized for
booting a Linux kernel with the -kernel option on x86. It was added
in qemu 2.7. Use it if available.
---
src/launch-direct.c | 6 ++++++
src/launch-libvirt.c | 9 +++++++++
2 files changed, 15 insertions(+)
diff --git a/src/launch-direct.c b/src/launch-direct.c
index 20f6471..332118e 100644
--- a/src/launch-direct.c
+++ b/src/launch-direct.c
@@ -436,6 +436,12 @@ launch_direct (guestfs_h *g, void *datav, const char *arg)
ADD_CMDLINE ("-initrd");
ADD_CMDLINE (initrd);
+ if (guestfs_int_qemu_supports_bios (g, data->qemu_data, "bios-fast.bin"))
{
+ /* Use the fast variant of SeaBIOS. */
+ ADD_CMDLINE ("-bios");
+ ADD_CMDLINE ("bios-fast.bin");
+ }
+
/* Add a random number generator (backend for virtio-rng). This
* isn't strictly necessary but means we won't need to hang around
* when needing entropy.
diff --git a/src/launch-libvirt.c b/src/launch-libvirt.c
index 05ab6a6..9f76afa 100644
--- a/src/launch-libvirt.c
+++ b/src/launch-libvirt.c
@@ -1159,6 +1159,15 @@ construct_libvirt_xml_boot (guestfs_h *g,
} end_element ();
}
}
+#if defined(__i386__) || defined(__x86_64__)
+ /* XXX libvirt should provide a way to detect if bios-fast.bin exists */
+ else if (guestfs_int_version_ge (¶ms->data->qemu_version, 2, 7, 0)) {
+ /* Use the fast variant of SeaBIOS. */
+ start_element ("loader") {
+ string ("bios-fast.bin");
+ } end_element ();
+ }
+#endif
start_element ("kernel") {
string (params->kernel);
--
2.7.4