From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoffer Dall <cdall@linaro.org>
Subject: Re: [PATCH v2 2/5] KVM: arm/arm64: Add ARM user space interrupt
 signaling ABI
Date: Tue, 21 Feb 2017 12:41:53 +0100
Message-ID: <20170221114153.GA26976@cbox>
References: <20170203145655.15007-1-cdall@linaro.org>
 <20170203145655.15007-3-cdall@linaro.org>
 <CAFEAcA-HMZnjbnhDC-13rWuQP-X2pk-W-6DvSR8n9_f-e4R=cA@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: "kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
        arm-mail-list <linux-arm-kernel@lists.infradead.org>,
        kvm-devel <kvm@vger.kernel.org>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Pekka Enberg <penberg@iki.fi>,
        Peter Maydell <peter.maydell@linaro.org>
To: Alexander Graf <agraf@suse.de>
Return-path: <kvm-owner@vger.kernel.org>
Received: from mail-wm0-f50.google.com ([74.125.82.50]:38696 "EHLO
        mail-wm0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751637AbdBULmH (ORCPT <rfc822;kvm@vger.kernel.org>);
        Tue, 21 Feb 2017 06:42:07 -0500
Received: by mail-wm0-f50.google.com with SMTP id r141so73233364wmg.1
        for <kvm@vger.kernel.org>; Tue, 21 Feb 2017 03:42:06 -0800 (PST)
Content-Disposition: inline
In-Reply-To: <CAFEAcA-HMZnjbnhDC-13rWuQP-X2pk-W-6DvSR8n9_f-e4R=cA@mail.gmail.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

Hi Alex,

On Fri, Feb 03, 2017 at 05:51:18PM +0000, Peter Maydell wrote:
> On 3 February 2017 at 14:56, Christoffer Dall <cdall@linaro.org> wrote:
> > From: Christoffer Dall <christoffer.dall@linaro.org>
> >
> > We have 2 modes for dealing with interrupts in the ARM world. We can
> > either handle them all using hardware acceleration through the vgic or
> > we can emulate a gic in user space and only drive CPU IRQ pins from
> > there.
> >
> > Unfortunately, when driving IRQs from user space, we never tell user
> > space about events from devices emulated inside the kernel, which may
> > result in interrupt line state changes, so we lose out on for example
> > timer and PMU events if we run with user space gic emulation.
> >
> > Define an ABI to publish such device output levels to userspace.
> >
> > Signed-off-by: Alexander Graf <agraf@suse.de>
> > Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
> 
> 
> Acked-by: Peter Maydell <peter.maydell@linaro.org>
> 
> for the userspace ABI/docs part.
> 

Given Peter's ack on this ABI, any chance you could take a look at
fixing the userspace SMP issue and respinning the userspace patches for
this series?

Thanks,
-Christoffer