From: Ian Campbell <Ian.Campbell@citrix.com>
To: Julien Grall <julien.grall@linaro.org>
Cc: xen-devel@lists.xenproject.org, tim@xen.org,
stefano.stabellini@citrix.com
Subject: Re: [PATCH for 4.5] xen/arm: flush_tlb_domain: Disable IRQ when flushing TLB of another domain
Date: Mon, 20 Oct 2014 14:21:18 +0100 [thread overview]
Message-ID: <1413811278.4087.25.camel@citrix.com> (raw)
In-Reply-To: <1413562484-13383-1-git-send-email-julien.grall@linaro.org>
On Fri, 2014-10-17 at 17:14 +0100, Julien Grall wrote:
> When Xen is flushing the TLB for another domain than current, it has to
> switch temporaly to the P2M of this domain. If the IRQs are enabled, it may
> be possible to receive an interrupt that require to use the P2M of the current
> domain, or even temporaly switch to another P2M.
> For the former case, the translation would be wrong. For the latter one,
> as the handler would restore the current P2M, Xen would flush the wrong domain
> TLB.
>
> Thankfully we don't have such interrupt handler, but it may be necessary
> in the future to do that during when the user asks to dump domain stack via
> a keystroke.
>
> Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked + applied as a bug fix. I fixed the spelling of temporarily for
you as I went, and fixed up some grammar.
Ian.
prev parent reply other threads:[~2014-10-20 13:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-17 16:14 [PATCH for 4.5] xen/arm: flush_tlb_domain: Disable IRQ when flushing TLB of another domain Julien Grall
2014-10-20 13:21 ` Ian Campbell [this message]
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