[Xen-devel] RE: x86_64 SMP support (status update)

["Nakajima, Jun" <jun.nakajima@xxxxxxxxx>]

Chris Wright wrote:
> Below is the patch I've been working with to get x86_64 SMP support
> going.  It's a definite work in progress.  Currently, I'm able to
> build 
> a second vcpu from dom0, but when it gets scheduled it crashes. 
> Booting 
> the same kernel with maxcpus=1 gets up to login prompt.  Here's some
> known issues:

Good progress and good start, i.e. we have at least one virutal
processor there :-).

We'll look at the problem too.

> 
> entry.S:
>       - preempt_{en,dis}able is commented out for now (due to
thread_info)
>       - ugly shl,shr combo to clear upper 32 bits.
> smpboot.c:
>       - faults if writing to cpu_gdt_table[1], so doing bogus
>         reuse of cpu 0 table entries directly
> 

Jun
---
Intel Open Source Technology Center

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