RE: [Xen-ia64-devel] [PATCH]Fix domain0 no VGA console bug.

[Alex Williamson <alex.williamson@xxxxxx>]

On Thu, 2006-06-01 at 09:45 +0800, Zhang, Xiantao wrote:
> Hi Alex,
>       We are using tiger4 platform. I didn't find md about space:
> 0xa0000-0xc0000 in efi memmap, maybe it was assumed
> EFI_MEMORY_MAPPED_IO in native OS. But dom_fw_init shouldn't neglect
> it to set IO space according to MDs efi provides. Seems your platform
> has VGA console. So this patch can enable VGA console on all platforms
> explicitly, maybe as you said this step is better to do in
> dom_fw_init :)

Hi Xiantao,

   One of my test systems has VGA, the other does not.  We cannot assume
VGA in the system.  If the MDT on the tiger4 doesn't describe that
range, then we probably need to at least revert to the test the Linux
kernel uses and test whether that range has a WB memory attribute before
assuming it's VGA.  Also, try not to double map the range for platforms
that do describe this as type EFI_MEMORY_MAPPED_IO.  Thanks,

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


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