Re: question about qemu+kvm+ovmf+winxp

Junhao Gao

Hi Laszlo
Thank you very much for your great support.

Hi David
Refer to

Interested users and developers should look for OVMF's "-D CSM_ENABLE"
build-time option, and check out the <> continuous
integration repository, which provides CSM-enabled OVMF builds.

Could you help me to choose which branch supporting CSM, and more details, thanks very much.


-----Original Message-----
From: <> On Behalf Of Laszlo Ersek
Sent: Friday, October 11, 2019 2:11 AM
To: Gao, Junhao <junhao.gao@...>
Cc:; David Woodhouse <dwmw2@...>
Subject: Re: [edk2-devel] question about qemu+kvm+ovmf+winxp

On 10/10/19 16:37, Junhao Gao wrote:
Hi edk2 members

I have a question for your help.
I want to enable qemu+kvm+ovmf to boot up windows xp,
then ovmf support winxp starting-up?
To my understanding, the first Windows "family" with any kind of UEFI support is Windows 7.

OvmfPkg/README has some comments on Windows support:

* UEFI Windows 8 boots
* UEFI Windows 7 & Windows 2008 Server boot (see important notes

=== UEFI Windows 7 & Windows 2008 Server ===

* One of the '-vga std' and '-vga qxl' QEMU options should be used.
* Only one video mode, 1024x768x32, is supported at OS runtime.
* The '-vga qxl' QEMU option is recommended. After booting the installed
guest OS, select the video card in Device Manager, and upgrade its driver
to the QXL XDDM one. Download location:
<>, Guest | Windows binaries.
This enables further resolutions at OS runtime, and provides S3
(suspend/resume) capability.
If you'd like to virtualize Windows XP on QEMU/KVM, please use SeaBIOS for guest firmware.

You can also try to build OVMF with -D CSM_ENABLE, but for that, you'll have to build SeaBIOS in CSM mode first, and embed that binary into OVMF at build time. Please ask David for details (CC'd).


qemu command:
qemu-system-x86_64 -hda winxp.img -boot c -enable-kvm -cpu host -bios ./OVMF.fd -m 512 -vga cirrus -net nic,model=rtl8139 -net user -usbdevice tablet -localtime
Then if ovmf support, could you provide me the way to compile the OVMF.fd?


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