From: Julien Grall <julien@xen.org>
To: Stefano Stabellini <sstabellini@kernel.org>
Cc: xen-devel@lists.xenproject.org, Peng Fan <peng.fan@nxp.com>,
Stefano Stabellini <stefano.stabellini@xilinx.com>,
Wei Xu <xuwei5@hisilicon.com>
Subject: Re: [Xen-devel] [PATCH v2] xen/arm: implement GICD_I[S/C]ACTIVER reads
Date: Sat, 28 Mar 2020 11:52:05 +0000 [thread overview]
Message-ID: <38f56c3e-8f7d-7aee-8216-73398f4543bb@xen.org> (raw)
In-Reply-To: <20200327023451.20271-1-sstabellini@kernel.org>
qHi Stefano,
On 27/03/2020 02:34, Stefano Stabellini wrote:
> This is a simple implementation of GICD_ICACTIVER / GICD_ISACTIVER
> reads. It doesn't take into account the latest state of interrupts on
> other vCPUs. Only the current vCPU is up-to-date. A full solution is
> not possible because it would require synchronization among all vCPUs,
> which would be very expensive in terms or latency.
Your sentence suggests you have number showing that correctly emulating
the registers would be too slow. Mind sharing them?
Cheers,
--
Julien Grall
next prev parent reply other threads:[~2020-03-28 11:52 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 2:34 [Xen-devel] [PATCH v2] xen/arm: implement GICD_I[S/C]ACTIVER reads Stefano Stabellini
2020-03-28 11:52 ` Julien Grall [this message]
2020-03-30 16:35 ` Stefano Stabellini
2020-03-30 21:19 ` Julien Grall
2020-04-01 0:57 ` Stefano Stabellini
2020-04-01 8:30 ` Julien Grall
2020-04-01 9:54 ` Bertrand Marquis
2020-04-01 17:02 ` George Dunlap
2020-04-01 17:56 ` Julien Grall
2020-04-01 17:23 ` Julien Grall
2020-04-02 8:17 ` Bertrand Marquis
2020-04-02 17:19 ` Stefano Stabellini
2020-04-02 18:52 ` Julien Grall
2020-04-03 8:47 ` Marc Zyngier
2020-04-03 10:43 ` George Dunlap
2020-04-03 10:59 ` Marc Zyngier
2020-04-03 11:15 ` George Dunlap
2020-04-03 11:16 ` Julien Grall
2020-04-03 16:18 ` Stefano Stabellini
2020-04-03 16:23 ` Julien Grall
2020-04-03 17:46 ` Julien Grall
2020-04-03 19:41 ` Stefano Stabellini
2020-04-03 20:27 ` Julien Grall
2020-04-06 17:58 ` George Dunlap
2020-04-06 18:47 ` Julien Grall
2020-04-07 16:16 ` George Dunlap
2020-04-07 16:25 ` Bertrand Marquis
2020-04-07 16:52 ` Julien Grall
2020-04-07 16:50 ` Julien Grall
2020-04-07 16:56 ` Julien Grall
2020-04-07 18:16 ` George Dunlap
2020-04-07 19:58 ` Julien Grall
2020-04-09 1:26 ` Stefano Stabellini
2020-04-09 12:56 ` Julien Grall
2020-04-09 13:00 ` Julien Grall
2020-04-17 15:16 ` Bertrand Marquis
2020-04-17 16:07 ` Julien Grall
2020-04-17 16:31 ` Stefano Stabellini
2020-04-17 16:47 ` Julien Grall
2020-04-08 15:54 ` Julien Grall
2020-03-31 0:05 ` [Xen-devel] " Julien Grall
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