Re: [Xen-devel] [PATCH] xen/arm64: Avoid sending SGI when kicking secondary cpus with spin_table

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hi Chen,

On 07/04/15 08:33, Chen Baozi wrote:
> From: Chen Baozi <baozich@xxxxxxxxx>
> 
> On arm64, either firmware or xen's smp_up_cpu gate uses WFE on secondary
> cpus to stand-by when booting. Thus, using SEV is enough for the boot
> cpu to kick other secondaries. Further more, the current implementation
> of cpu_up_send_sgi would pass a NULL cpumask pointer to send_SGI, which
> then lead a data fault on GICv3 send_SGI implementation.

I've sent a patch to fix send_SGI on GICv3 [1]. You should not see the
segfault anymore.

Although, you were saying that the SGI is not necessary for the spin
table. Right?

If so, it would be nice to avoid it at least to respect the behavior
with spin table.

Regards,

-- 
Julien Grall

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