[Xen-devel] Re: [PATCH 1/2] x86, hvm: allow another vcpu to receive PIT IRQ (support kexec/kdump on hvm)

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

Hi Keir,

Thanks for your review and comments.

Keir Fraser writes:
> Well, looking at patch 1/2 to start with, some of the issues you address are
> not particular to the PIT, but to any interrupt delivered via vpt.c. I
> suspect what you really need is a hook into vpt.c when a vcpu goes down, to
> move all its vpt's (except its own LAPIC one) onto another vcpu's list. And
> on create_periodic_time() ignore the suggested vcpu given by the caller if
> that vcpu is down. And disable the IRQ0_SPECIAL_ROUTING in vioapic.c if
> vcpu0 is down.

This doesn't work since the ioapic is completely disabled.

I've found a interesting thread in LKML archives.
Subject: [PATCH] kexec: force x86_64 arches to boot kdump kernels on boot cpu
http://lkml.org/lkml/2007/11/26/346

Probably we should fix the guest bios(MP table, ioapic initialization).

I'm looking into it.

Thanks,
Kouya

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel