[SeaBIOS] [PATCH 1/3] Add generic qemu detection
gleb at redhat.com
Mon Sep 16 14:34:02 CEST 2013
On Mon, Sep 16, 2013 at 02:27:37PM +0200, Gerd Hoffmann wrote:
> On Mo, 2013-09-16 at 14:10 +0300, Gleb Natapov wrote:
> > On Mon, Sep 16, 2013 at 12:36:28PM +0200, Gerd Hoffmann wrote:
> > > This patch adds support for detecting whenever SeaBIOS runs on qemu
> > > or not. This is done by looking at the northbridge (pci device 00:00.0)
> > > and check the subsystem id. Most pci devices emulated by qemu -- the
> > > two northbridges i440fx and q35 included -- have a subsystem id of
> > > "1af4:1100".
> > >
> > > In case the subsystem ID matches set PF_QEMU, log a message (including
> > > the northbridge found while being at it) and also check for kvm.
> > >
> > What if other userspace will want to write enough support to run Seabios
> > as a guest? Why kvm detection depends on QEMU?
> What other userspace? There is none today. And if that changes some
> day we'll just call kvm_detect() in the init code for $otheruserspace.
Why seabios code has to be changed at all to support other device model
emulator (assuming it will emulate same chipset)?
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