From: "Jan Beulich" <JBeulich@suse.com>
To: J Ahn <jeong.seob.ahn@gmail.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: How to handle TLB shootdown IPI on Xen
Date: Tue, 13 Aug 2013 11:16:58 +0100 [thread overview]
Message-ID: <520A23BA02000078000EB785@nat28.tlf.novell.com> (raw)
In-Reply-To: <CAFgwMgqq8vJPx2CDyfaB+W43T=roE-o6jbw1nmYFJ3tYgKFrWA@mail.gmail.com>
>>> On 12.08.13 at 18:50, J Ahn <jeong.seob.ahn@gmail.com> wrote:
> As I mentioned the first post, I also guess that the hypervisor
> intervention is required to route the virtual IPI.
> So, I would like to know where the delivery code on Xen has been located
> because I could not find the delivery point for the virtual IPI.
>
> Does the *vmx_do_extint()* function delivery the IPI through *
> __do_IRQ_guest()* ??
How would it? I suppose you know that IPIs get generated through
writing to LAPIC register, so associating this with the functions in
xen/arch/x86/hvm/vlapic.c shouldn't be too difficult; namely you
want to look at vlapic_reg_write()'s handling of APIC_ICR{,2} and
APIC_SELF_IPI.
Jan
next prev parent reply other threads:[~2013-08-13 10:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-11 16:22 How to handle TLB shootdown IPI on Xen J Ahn
2013-08-12 8:36 ` Jan Beulich
2013-08-12 12:47 ` J Ahn
2013-08-12 13:29 ` Jan Beulich
2013-08-12 16:04 ` J Ahn
2013-08-12 16:24 ` Jan Beulich
2013-08-12 16:50 ` J Ahn
2013-08-13 10:16 ` Jan Beulich [this message]
2013-08-13 13:16 ` J Ahn
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