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Message-ID: <20230811170054.GB3593414-robh@kernel.org>
Date:   Fri, 11 Aug 2023 11:00:54 -0600
From:   Rob Herring <robh@...nel.org>
To:     Yi-De Wu <yi-de.wu@...iatek.com>
Cc:     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>,
        Will Deacon <will@...nel.org>, 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 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?

Yes, there's KVM stuff in arch/arm64, but that is multi-arch.

>  drivers/virt/geniezone/Makefile         |   3 +-
>  drivers/virt/geniezone/gzvm_vcpu.c      | 250 ++++++++++++++++++++++++
>  drivers/virt/geniezone/gzvm_vm.c        |   5 +
>  include/linux/gzvm_drv.h                |  21 ++
>  include/uapi/linux/gzvm.h               | 136 +++++++++++++
>  10 files changed, 564 insertions(+), 2 deletions(-)
>  create mode 100644 arch/arm64/geniezone/vcpu.c
>  create mode 100644 drivers/virt/geniezone/gzvm_vcpu.c

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