Re: [Xen-devel] [PATCH][HVM] Reserve MMIO a0000-c0000 in ACPI dsdt

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 16/11/06 7:53 am, "He, Qing" <qing.he@xxxxxxxxx> wrote:

> This patch reserves MMIO 0xa0000 to 0xc0000 in ACPI dsdt, it avoids
> possible vga driver loading problem in HVM Windows guest.
> Also fixes a Makefile bug in hvmloader directory.

Is this *actually* a problem? I didn't think BIOS tables had to report
0xA0000-0xBFFFF as special. Certainly e820 and EFI reporting mechanisms
should ignore it as the hole is a well-defined part of the PC memory layout.
Also OSes don't treat or probe for standard vga as a pci device.

 -- Keir



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