In the simplest case, "runqemu qemux86 <some-image> qcow2 ovmf" for an
EFI-enabled image in the qcow2 format will locate the ovmf.qcow2
firmware file deployed by the ovmf recipe in the image deploy
directory, override the graphics hardware with "-vga std" because that
is all that OVMF supports, and boot with UEFI enabled.
ovmf is not built by default. Either do it explicitly ("bitbake ovmf")
or make it a part of the normal build
("MACHINE_ESSENTIAL_EXTRA_RDEPENDS_append = ' ovmf'").
The firmware file is activated as a flash drive instead of using the
qemu BIOS parameters, because that is the recommended method
(https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=764918#47) as it
allows storing UEFI variables in the file.
Instead of just "ovmf", a full path to an existing file can also be
used, just as with the rootfs. That may be useful when making a
permanent copy of the virtual machine data files.
It is possible to specify "ovmf*" parameters more than once, then
each parameter creates a separate flash drive. This way it is possible
to use separate flash drives for firmware code and variables:
$ runqemu qemux86 <some-image> qcow2 ovmf.code ovmf.vars"
Note that rebuilding ovmf will overwrite the ovmf.vars.qcow2 file in
the image deploy directory. So when the goal is to update the firmware
while keeping variables, make a copy of the variable file and use
that:
$ mkdir my-machine
$ cp tmp/deploy/images/qemux86/ovmf.vars.qcow2 my-machine/
$ runqemu qemux86 <some-image> qcow2 ovmf.code my-machine/ovmf.vars.qcow2
When Secure Boot was enabled in ovmf, one can pick that instead of
the non-Secure-Boot enabled ovmf.code:
$ runqemu qemux86 <some-image> qcow2 ovmf.secboot.code
my-machine/ovmf.vars.qcow2
Signed-off-by: Patrick Ohly <patrick.o...@intel.com>
---
scripts/runqemu | 42 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 41 insertions(+), 1 deletion(-)
diff --git a/scripts/runqemu b/scripts/runqemu
index 9a5bca9..e14f25e 100755
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -74,6 +74,7 @@ of the following environment variables (in any order):
kvm-vhost - enable KVM with vhost when running x86/x86_64 (VT-capable CPU
required)
publicvnc - enable a VNC server open to all hosts
audio - enable audio
+ [*/]ovmf* - OVMF firmware file or base name for booting with UEFI
tcpserial=<port> - specify tcp serial port number
biosdir=<dir> - specify custom bios dir
biosfilename=<filename> - specify bios filename
@@ -162,6 +163,13 @@ class BaseConfig(object):
self.clean_nfs_dir = False
self.nfs_server = ''
self.rootfs = ''
+ # File name(s) of a OVMF firmware file or variable store,
+ # to be added with -drive if=pflash.
+ # Found in the same places as the rootfs, with or without one of
+ # these suffices: qcow2, bin.
+ # Setting one also adds "-vga std" because that is all that
+ # OVMF supports.
+ self.ovmf_bios = []
self.qemuboot = ''
self.qbconfload = False
self.kernel = ''
@@ -259,6 +267,7 @@ class BaseConfig(object):
- Check whether is a kernel file
- Check whether is a image file
- Check whether it is a nfs dir
+ - Check whether it is a OVMF flash file
"""
if p.endswith('.qemuboot.conf'):
self.qemuboot = p
@@ -289,6 +298,8 @@ class BaseConfig(object):
else:
logger.info("Assuming %s is an nfs rootfs" % p)
self.check_arg_nfs(p)
+ elif os.path.basename(p).startswith('ovmf'):
+ self.ovmf_bios.append(p)
else:
raise Exception("Unknown path arg %s" % p)
@@ -374,6 +385,8 @@ class BaseConfig(object):
elif re.search(r'-image-|-image$', arg):
# Lazy rootfs
self.rootfs = arg
+ elif arg.startswith('ovmf'):
+ self.ovmf_bios.append(arg)
else:
# At last, assume is it the MACHINE
if (not unknown_arg) or unknown_arg == arg:
@@ -472,6 +485,20 @@ class BaseConfig(object):
if not os.path.exists(self.rootfs):
raise Exception("Can't find rootfs: %s" % self.rootfs)
+ def check_ovmf(self):
+ """Check and set full path for OVMF firmware and variable file(s)."""
+
+ for index, ovmf in enumerate(self.ovmf_bios):
+ if os.path.exists(ovmf):
+ continue
+ for suffix in ('qcow2', 'bin'):
+ path = '%s/%s.%s' % (self.get('DEPLOY_DIR_IMAGE'), ovmf,
suffix)
+ if os.path.exists(path):
+ self.ovmf_bios[index] = path
+ break
+ else:
+ raise Exception("Can't find OVMF firmware: %s" % ovmf)
+
def check_kernel(self):
"""Check and set kernel, dtb"""
# The vm image doesn't need a kernel
@@ -562,6 +589,7 @@ class BaseConfig(object):
self.check_kvm()
self.check_fstype()
self.check_rootfs()
+ self.check_ovmf()
self.check_kernel()
self.check_biosdir()
self.check_mem()
@@ -670,6 +698,8 @@ class BaseConfig(object):
print('NFS_DIR: [%s]' % self.nfs_dir)
else:
print('ROOTFS: [%s]' % self.rootfs)
+ if self.ovmf_bios:
+ print('OVMF: %s' % self.ovmf_bios)
print('CONFFILE: [%s]' % self.qemuboot)
print('')
@@ -926,7 +956,17 @@ class BaseConfig(object):
check_libgl(qemu_bin)
- self.qemu_opt = "%s %s %s %s %s" % (qemu_bin, self.get('NETWORK_CMD'),
self.get('ROOTFS_OPTIONS'), self.get('QB_OPT_APPEND'), self.qemu_opt_script)
+ self.qemu_opt = "%s %s %s %s" % (qemu_bin, self.get('NETWORK_CMD'),
self.get('ROOTFS_OPTIONS'), self.get('QB_OPT_APPEND'))
+
+ for ovmf in self.ovmf_bios:
+ format = ovmf.rsplit('.', 1)[-1]
+ self.qemu_opt += ' -drive if=pflash,format=%s,file=%s' % (format,
ovmf)
+ if self.ovmf_bios:
+ # OVMF only supports normal VGA, i.e. we need to override a -vga
vmware
+ # that gets added for example for normal qemux86.
+ self.qemu_opt += ' -vga std'
+
+ self.qemu_opt += ' ' + self.qemu_opt_script
if self.snapshot:
self.qemu_opt += " -snapshot"
--
2.1.4
--
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