linux-kernel - Re: [PATCH v5 04/12] virt: geniezone: Add vcpu support

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Message-ID: <20230815095346.GA11083@willie-the-truck>
Date:   Tue, 15 Aug 2023 10:53:47 +0100
From:   Will Deacon <will@...nel.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Yi-De Wu <yi-de.wu@...iatek.com>,
        Yingshiuan Pan <yingshiuan.pan@...iatek.com>,
        Ze-Yu Wang <ze-yu.wang@...iatek.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Catalin Marinas <catalin.marinas@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arch@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        David Bradil <dbrazdil@...gle.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Ivan Tseng <ivan.tseng@...iatek.com>,
        Jade Shih <jades.shih@...iatek.com>,
        My Chuang <my.chuang@...iatek.com>,
        Shawn Hsiao <shawn.hsiao@...iatek.com>,
        PeiLun Suei <peilun.suei@...iatek.com>,
        Liju Chen <liju-clr.chen@...iatek.com>,
        Willix Yeh <chi-shen.yeh@...iatek.com>
Subject: Re: [PATCH v5 04/12] virt: geniezone: Add vcpu support

On Fri, Aug 11, 2023 at 11:00:54AM -0600, Rob Herring wrote:
> On Thu, Jul 27, 2023 at 03:59:57PM +0800, Yi-De Wu wrote:
> > From: "Yingshiuan Pan" <yingshiuan.pan@...iatek.com>
> > 
> > VMM use this interface to create vcpu instance which is a fd, and this
> > fd will be for any vcpu operations, such as setting vcpu registers and
> > accepts the most important ioctl GZVM_VCPU_RUN which requests GenieZone
> > hypervisor to do context switch to execute VM's vcpu context.
> > 
> > Signed-off-by: Yingshiuan Pan <yingshiuan.pan@...iatek.com>
> > Signed-off-by: Jerry Wang <ze-yu.wang@...iatek.com>
> > Signed-off-by: Liju Chen <liju-clr.chen@...iatek.com>
> > Signed-off-by: Yi-De Wu <yi-de.wu@...iatek.com>
> > ---
> >  arch/arm64/geniezone/Makefile           |   2 +-
> >  arch/arm64/geniezone/gzvm_arch_common.h |  20 ++
> >  arch/arm64/geniezone/vcpu.c             |  88 +++++++++
> >  arch/arm64/geniezone/vm.c               |  11 ++
> >  arch/arm64/include/uapi/asm/gzvm_arch.h |  30 +++
> 
> I'm almost certain that the arm64 maintainers will reject putting this 
> here. What is the purpose of the split with drivers/virt/? Do you plan 
> to support another arch in the near future?

Thanks, Rob. You're absolutely right that this doesn't belong in the
architecture code.

Will