On Mon, Jul 26, 2010 at 12:47 PM, Avi Kivity <avi@xxxxxxxxxx> wrote: > On 07/25/2010 07:23 PM, Kevin O'Connor wrote: >> >> On Sun, Jul 25, 2010 at 11:54:20AM +0300, Avi Kivity wrote: >>> >>> On 07/24/2010 06:45 PM, Kevin O'Connor wrote: >>>> >>>> On Mon, Jul 12, 2010 at 04:13:06PM +0300, Avi Kivity wrote: >>>>> >>>>> Does SeaBIOS use big real mode now? >>>> >>>> SeaBIOS calls option roms in big real mode. This is required by the >>>> relevant specs. >>> >>> Can you provide a pointer? >> >> See the PMM spec section 2.2 and section 3.2.4. (Sadly, I can't find >> a link to the PMM spec on the web anymore - hopefully you have a >> copy.) Also see the PCI Firmware Specification v3.0 - section >> 5.2.1.9. > > Unfortunately, I don't have a copy. There were some links here but they don't work anymore. The file name is specspmm101.pdf: http://lists.xensource.com/archives/html/xen-changelog/2009-01/msg00153.html >> The specs don't require any code addresses to be>64K, but it does >> require data access over 64K. I doubt there are many systems that use >> a code address>64K, because an interrupt in big real mode still only >> stores a 16bit return address - thus an irq (or nmi) in that mode will >> basically cause a crash. > > Ok. Flat 4G segments happen to accidentally work in kvm-intel, and we can > keep it working. > > -- > error compiling committee.c: too many arguments to function > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
