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root / pc-bios / optionrom @ 2a2af967

Name Size
Makefile 879 Bytes
kvmvapic.S 5.2 kB
linuxboot.S 2.9 kB
multiboot.S 4.1 kB
optionrom.h 3.2 kB

Latest revisions

# Date Author Comment
2a2af967 02/18/2012 12:15 pm Jan Kiszka

kvmvapic: Add option ROM

This imports and builds the original VAPIC option ROM of qemu-kvm.
Its interaction with QEMU is described in the commit that introduces the
corresponding device model.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Avi Kivity <>

6fbcef29 02/01/2012 10:45 pm Jan Kiszka

optionroms: Silence intermediate file removal

The build process of optionroms spits out an "rm ..." line. Moreover, it
removes all .o files that can be handy for debugging purposes. So
disable automatic intermediate removal.

Signed-off-by: Jan Kiszka <>...

e7d81004 12/14/2011 01:09 pm Stefan Weil

Fix spelling in comments, documentation and messages


75b9f690 03/22/2011 08:00 am Gleb Natapov

fix linuxboot.bin and multiboot.bin to not hijack int19

Currently linuxboot.bin and multiboot.bin option roms override int19
vector to intercept boot process. No sane option rom should do that.
Provide bev entry instead that will be called by BIOS if option rom...

4c3b5a48 01/20/2011 10:54 pm Blue Swirl

Add scripts directory

Move build and user scripts into scripts directory.

Signed-off-by: Blue Swirl <>

33bbd1de 11/21/2010 05:16 pm Avi Kivity

optionrom: fix bugs in has multiple bugs:

- the last byte is considered when calculating the existing checksum, but not
when computing the correction
- apprently the 'expr' expression overflows and produces incorrect results with...

590bf491 06/09/2010 01:35 pm Alexander Graf

Fix multiboot compilation

Commit dd4239d6574ca41c94fc0d0f77ddc728510ffc57 broke multiboot. It replaced the
instruction "rep insb (%dx), %es:(%edi)" by the binary output of
"addr32 rep insb (%dx), %es:(%di)".

Linuxboot calls the respective helper function in a code16 section. So the...

d0652aa8 01/08/2010 05:58 pm Avi Kivity

linuxboot: fix gdt address calculation

The gdt address calculation in linuxboot.bin is broken in two ways: first
it loads %cs into %eax, but that instruction leaves the high bits of %eax
undefined and we did not clear them. Secondly, we completely ignore the...

076d2471 01/08/2010 05:58 pm Paolo Bonzini

Use vpath directive

The vpath directive has two advantages over the VPATH variable:
1) it allows to skip searching of .o files; 2) the default semantics
are to append to the vpath, so there is no confusion between "VPATH=xyz"
and "VPATH+=xyz".

Since "vpath %.c %.h PATH" is not valid, I'm introducing a wrapper...

36ecd7c0 12/18/2009 07:26 pm Paolo Bonzini

Fix thinko in linuxboot.S

The %gs segment that was used was not matching the comments.
I just moved the GDT descriptor on the stack instead.

Signed-off-by: Paolo Bonzini <>
Signed-off-by: Anthony Liguori <>

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