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RE: [PATCH V5 1/9] accel/kvm: Extract common KVM vCPU {creation,parking}


From: Salil Mehta
Subject: RE: [PATCH V5 1/9] accel/kvm: Extract common KVM vCPU {creation,parking} code
Date: Thu, 12 Oct 2023 14:38:43 +0000

Hi Jonathan,

> From: Jonathan Cameron <jonathan.cameron@huawei.com>
> Sent: Thursday, October 12, 2023 3:36 PM
> To: Salil Mehta <salil.mehta@huawei.com>
> Cc: qemu-devel@nongnu.org; qemu-arm@nongnu.org; maz@kernel.org; jean-
> philippe@linaro.org; lpieralisi@kernel.org; peter.maydell@linaro.org;
> richard.henderson@linaro.org; imammedo@redhat.com; andrew.jones@linux.dev;
> david@redhat.com; philmd@linaro.org; eric.auger@redhat.com;
> oliver.upton@linux.dev; pbonzini@redhat.com; mst@redhat.com;
> will@kernel.org; gshan@redhat.com; rafael@kernel.org;
> alex.bennee@linaro.org; linux@armlinux.org.uk;
> darren@os.amperecomputing.com; ilkka@os.amperecomputing.com;
> vishnu@os.amperecomputing.com; karl.heubaum@oracle.com;
> miguel.luis@oracle.com; salil.mehta@opnsrc.net; zhukeqian
> <zhukeqian1@huawei.com>; wangxiongfeng (C) <wangxiongfeng2@huawei.com>;
> wangyanan (Y) <wangyanan55@huawei.com>; jiakernel2@gmail.com;
> maobibo@loongson.cn; lixianglai@loongson.cn; Linuxarm <linuxarm@huawei.com>
> Subject: Re: [PATCH V5 1/9] accel/kvm: Extract common KVM vCPU
> {creation,parking} code
> 
> On Wed, 11 Oct 2023 20:43:47 +0100
> Salil Mehta <salil.mehta@huawei.com> wrote:
> 
> > KVM vCPU creation is done once during the initialization of the VM when
> Qemu
> > thread is spawned. This is common to all the architectures.
> >
> > Hot-unplug of vCPU results in destruction of the vCPU object in QOM but
> the
> > corresponding KVM vCPU object in the Host KVM is not destroyed and its
> > representative KVM vCPU object/context in Qemu is parked.
> >
> > Refactor common logic so that some APIs could be reused by vCPU Hotplug 
> > code.
> 
> If you are respinning I'd also call out that you added some trace points.

Ok. Will do.

Thanks

> > Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
> > Reviewed-by: Gavin Shan <gshan@redhat.com>
> > Tested-by: Vishnu Pajjuri <vishnu@os.amperecomputing.com>
> Otherwise LGTM as it's a straight forward refactor.
> 
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> 




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