From 715f4e3ec1743a9565cefeee6707edabbd5a2201 Mon Sep 17 00:00:00 2001 From: Patrick Ohly Date: Fri, 16 Dec 2016 15:18:12 +0100 Subject: runqemu: support UEFI with OVMF firmware In the simplest case, "runqemu qemux86 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 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 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 qcow2 ovmf.secboot.code my-machine/ovmf.vars.qcow2 (From OE-Core rev: b91fc0893651b9e3069893e36439de0b4e70ad13) Signed-off-by: Patrick Ohly Signed-off-by: Richard Purdie --- scripts/runqemu | 42 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) (limited to 'scripts/runqemu') diff --git a/scripts/runqemu b/scripts/runqemu index 918141238c..4d8fc8ec3c 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= - specify tcp serial port number biosdir= - specify custom bios dir biosfilename= - specify bios filename @@ -175,6 +176,13 @@ 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 = '' @@ -281,6 +289,7 @@ 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 @@ -321,6 +330,8 @@ 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) @@ -406,6 +417,8 @@ 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: @@ -504,6 +517,20 @@ 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 @@ -598,6 +625,7 @@ class BaseConfig(object): self.check_kvm() self.check_fstype() self.check_rootfs() + self.check_ovmf() self.check_kernel() self.check_biosdir() self.check_mem() @@ -706,6 +734,8 @@ 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('') @@ -1012,7 +1042,17 @@ 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" -- cgit v1.2.3-54-g00ecf