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xen-ia64-devel
[Xen-ia64-devel] Re: [PATCH]: vcpu hot-plug/remove for VTi
On Thu, Feb 15, 2007 at 01:55:04PM -0700, Alex Williamson wrote:
> Hi Tristan,
>
> Why can't VTi vCPUs do a return through b0 like Linux does on real
> hardware? Thanks,
vCPUs still return through b0. There is no change in the Linux code.
In PV mode, b0 is set by Xen and points to an hypercall which stop the vcpu.
This hypercall is not available in VTi (only basic Xen hypercalls, PAL and
SAL are available). Therefore I have copied this feature in SAL. The VTi SAL
has to correctly set b0 and has to do the return.
We don't need to change Linux (of course) you simply need a GFW which handle
this feature.
Tristan.
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