Yes, it looks easy. It's just been disabled in the Makefiles.
However --- does your X server work without MTRR support? Normally you
get a warning, but the server still works okay... in which case this
isn't a priority.
-- Keir
> I'll give it a bit of thought. I suspect that it will be easy to
> provide direct access to DOM0.
>
> -- Keir
>
> > Hi
> >
> > On Tue, 17 Aug 2004 18:56:48 +0100
> > Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
> > > This bug should now be fixed.
> >
> > OK I've got a progress, but need little more help.
> >
> > The thing is, X requires MTRR support:-
> > (please see the log below)
> >
> > I activated the MTRR support part at arch/xen/i386/Kconfig
> > and recompile the dom0 kernel so CONFIG_MTRR=y should be
> > built-in.
> > (install/boot/config-2.6.7-xen0 does have the line CONFIG_MTRR=y).
> > But /proc/mtrr does not appear after reboot.
> >
> > How can I activate MTRR support under ARCH=xen?
> >
> > Thanks very much for your patience.
> >
> > ===================== log =========================================
> > * Xorg.log.0
> > (II) Reloading /usr/X11R6/lib/modules/linux/libint10.a
> > (II) I810(0): initializing int10
> > (WW) I810(0): Bad V_BIOS checksum
> > (II) I810(0): Primary V_BIOS segment is: 0xc000
> > (WW) System lacks support for changing MTRRs
> >
> > * strace
> > 7020 mmap2(NULL, 4096, PROT_READ, MAP_SHARED, 5, 0) = 0x402dd000
> > 7020 munmap(0x402dd000, 4096) = 0
> > 7020 close(5) = 0
> > 7020 write(0, "(WW) I810(0): Bad V_BIOS checksu"..., 34) = 34
> > 7020 write(0, "(II) I810(0): Primary V_BIOS seg"..., 48) = 48
> > 7020 open("/dev/mem", O_RDWR) = 5
> > 7020 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 5, 0) =
> > 0x402dd000
> > 7020 close(5) = 0
> > 7020 open("/dev/cpu/mtrr", O_WRONLY) = -1 ENOENT (No such file or
> > directory)
> > 7020 open("/proc/mtrr", O_WRONLY) = -1 ENOENT (No such file or
> > directory)
> > 7020 write(0, "(WW) System lacks support for ch"..., 45) = 45
> > 7020 munmap(0x402dd000, 4096) = 0
> > (snip)...
> >
> > Best regards,
> > Daisaku Watanabe
> >
> >
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>
>
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