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Re: [Xen-ia64-devel] [PATCH][LINUX] Support timer vector IPIs in PV code

To: Alex Williamson <alex.williamson@xxxxxx>
Subject: Re: [Xen-ia64-devel] [PATCH][LINUX] Support timer vector IPIs in PV code
From: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Date: Mon, 28 Jul 2008 11:32:15 +0900
Cc: xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
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On Thu, Jul 24, 2008 at 12:28:27PM -0600, Alex Williamson wrote:
> 
> Upstream Linux recently added this change:
> 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3463a93def55c309f3c0d0a8aaf216be3be42d64
> 
> Now, for a platform bug check, we issue an IPI for the IA64_TIMER_VECTOR
> and wait for it to show up in the IRR.  Since a PV kernel doesn't
> support a timer IPI, this never happens.  The fix is simply to tie this
> into xen_send_ipi() for this case.  This doesn't actually happen on
> 2.6.18, but since vendors are backporting changes from upstream, I think
> it's good to have this in the reference tree.  Thanks,
> 
> Alex
> 
> 
> Add support for IA64_TIMER_VECTOR as a paravirtualized IPI target
> 
> Necessary for the latest upstream Linux implementation of
> check_sal_cache_flush() 3463a93def55c309f3c0d0a8aaf216be3be42d64
> 
> Signed-off-by: Alex Williamson <alex.williamson@xxxxxx>

Applied, thanks.

-- 
yamahata

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