Re: [Xen-ia64-devel] [PATCH] fix ptc.ga emulation

[Alex Williamson <alex.williamson@xxxxxx>]

On Fri, 2007-04-13 at 22:06 +0900, Kouya SHIMURA wrote:
> ptc.ga infrequently clobbers the region register 0.
> 
> When vcpu1 purges TLBs of vcpu2 and
> ptc_ga_remote_func() is called locally not via IPI
> (i.e. vcpu1 shares the same pcpu with vcpu2),
> in ptc_ga_remote_func(),
>   save vrr[0] of vcpu2
>   ... => switch to vcpu2 and set a new value of vrr[0]
>   restore vrr[0] of vcpu2 // the new value is lost
> 
> Windows will crash due to this issue.

   Applied.  Thanks,

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


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