RE: [Xen-devel] [patch 2/2] Preserve correct PIC vectors acrossXenvmxassist 16/32-bit transitions

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

RHEL4U4 PAE SMP guest will crash on current xen-unstable tree, and we
found changeset 15214 introduced it, test show that the attached patch
can fix the crash.



Respect irqbase set by protected mode in mode switching with VMXAssist.
Signed-off-by: Xin Li <xin.b.li@xxxxxxxxx>
Signed-off-by: Dexuan Cui <dexuan.cui@xxxxxxxxx>



>-----Original Message-----
>From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
>[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Li, Xin B
>Sent: Thursday, June 07, 2007 12:34 AM
>To: Stephen C. Tweedie; xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: RE: [Xen-devel] [patch 2/2] Preserve correct PIC 
>vectors acrossXenvmxassist 16/32-bit transitions
>
>
>>This code teaches vmxassist:
>>
>>1) to remember how the guest has set up the virtual PIC interrupt
>>vectors; and
>>2) to reprogram the vPIC to point to the true guest vector 
>>when entering
>>32-bit mode, and to point back to the vmxassist bounce-irq traps when
>>reentering 16-bit mode.
>>
>
>In Dec 2006, I created a patch to fix this issue, and may be better.
>I didn't send it out just because some other critical issue in
>VMXassist, hopefully the emulation way will be done soon.
>thanks
>-Xin 
>

gfxboot_vmassist_fix.patch
Description: gfxboot_vmassist_fix.patch

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