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From: Salil Mehta via <qemu-devel@nongnu.org>
To: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
	"maz@kernel.org" <maz@kernel.org>,
	"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
	"lpieralisi@kernel.org" <lpieralisi@kernel.org>,
	"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
	"richard.henderson@linaro.org" <richard.henderson@linaro.org>,
	"imammedo@redhat.com" <imammedo@redhat.com>,
	"andrew.jones@linux.dev" <andrew.jones@linux.dev>,
	"david@redhat.com" <david@redhat.com>,
	"philmd@linaro.org" <philmd@linaro.org>,
	"eric.auger@redhat.com" <eric.auger@redhat.com>,
	"oliver.upton@linux.dev" <oliver.upton@linux.dev>,
	"pbonzini@redhat.com" <pbonzini@redhat.com>,
	"mst@redhat.com" <mst@redhat.com>,
	"will@kernel.org" <will@kernel.org>,
	"gshan@redhat.com" <gshan@redhat.com>,
	"rafael@kernel.org" <rafael@kernel.org>,
	"alex.bennee@linaro.org" <alex.bennee@linaro.org>,
	"linux@armlinux.org.uk" <linux@armlinux.org.uk>,
	"darren@os.amperecomputing.com" <darren@os.amperecomputing.com>,
	"ilkka@os.amperecomputing.com" <ilkka@os.amperecomputing.com>,
	"vishnu@os.amperecomputing.com" <vishnu@os.amperecomputing.com>,
	"karl.heubaum@oracle.com" <karl.heubaum@oracle.com>,
	"miguel.luis@oracle.com" <miguel.luis@oracle.com>,
	"salil.mehta@opnsrc.net" <salil.mehta@opnsrc.net>,
	zhukeqian <zhukeqian1@huawei.com>,
	"wangxiongfeng (C)" <wangxiongfeng2@huawei.com>,
	"wangyanan (Y)" <wangyanan55@huawei.com>,
	"jiakernel2@gmail.com" <jiakernel2@gmail.com>,
	"maobibo@loongson.cn" <maobibo@loongson.cn>,
	"lixianglai@loongson.cn" <lixianglai@loongson.cn>,
	Linuxarm <linuxarm@huawei.com>
Subject: RE: [PATCH V5 1/9] accel/kvm: Extract common KVM vCPU {creation,parking} code
Date: Thu, 12 Oct 2023 14:38:43 +0000	[thread overview]
Message-ID: <ff06c2f8c85948b3be5a9855086dd5cd@huawei.com> (raw)
In-Reply-To: <20231012153625.00005025@Huawei.com>

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>
> 



WARNING: multiple messages have this Message-ID (diff)
From: Salil Mehta <salil.mehta@huawei.com>
To: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
	"maz@kernel.org" <maz@kernel.org>,
	"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
	"lpieralisi@kernel.org" <lpieralisi@kernel.org>,
	"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
	"richard.henderson@linaro.org" <richard.henderson@linaro.org>,
	"imammedo@redhat.com" <imammedo@redhat.com>,
	"andrew.jones@linux.dev" <andrew.jones@linux.dev>,
	"david@redhat.com" <david@redhat.com>,
	"philmd@linaro.org" <philmd@linaro.org>,
	"eric.auger@redhat.com" <eric.auger@redhat.com>,
	"oliver.upton@linux.dev" <oliver.upton@linux.dev>,
	"pbonzini@redhat.com" <pbonzini@redhat.com>,
	"mst@redhat.com" <mst@redhat.com>,
	"will@kernel.org" <will@kernel.org>,
	"gshan@redhat.com" <gshan@redhat.com>,
	"rafael@kernel.org" <rafael@kernel.org>,
	"alex.bennee@linaro.org" <alex.bennee@linaro.org>,
	"linux@armlinux.org.uk" <linux@armlinux.org.uk>,
	"darren@os.amperecomputing.com" <darren@os.amperecomputing.com>,
	"ilkka@os.amperecomputing.com" <ilkka@os.amperecomputing.com>,
	"vishnu@os.amperecomputing.com" <vishnu@os.amperecomputing.com>,
	"karl.heubaum@oracle.com" <karl.heubaum@oracle.com>,
	"miguel.luis@oracle.com" <miguel.luis@oracle.com>,
	"salil.mehta@opnsrc.net" <salil.mehta@opnsrc.net>,
	zhukeqian <zhukeqian1@huawei.com>,
	"wangxiongfeng (C)" <wangxiongfeng2@huawei.com>,
	"wangyanan (Y)" <wangyanan55@huawei.com>,
	"jiakernel2@gmail.com" <jiakernel2@gmail.com>,
	"maobibo@loongson.cn" <maobibo@loongson.cn>,
	"lixianglai@loongson.cn" <lixianglai@loongson.cn>,
	Linuxarm <linuxarm@huawei.com>
Subject: RE: [PATCH V5 1/9] accel/kvm: Extract common KVM vCPU {creation,parking} code
Date: Thu, 12 Oct 2023 14:38:43 +0000	[thread overview]
Message-ID: <ff06c2f8c85948b3be5a9855086dd5cd@huawei.com> (raw)
Message-ID: <20231012143843.UCZNjEV8BAyvJ8FPpXPyHNsmN3GcUJQV6LALB90JQ-4@z> (raw)
In-Reply-To: <20231012153625.00005025@Huawei.com>

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>
> 



  parent reply	other threads:[~2023-10-12 14:39 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-11 19:43 [PATCH V5 0/9] Add architecture agnostic code to support vCPU Hotplug Salil Mehta via
2023-10-11 19:43 ` Salil Mehta
2023-10-11 19:43 ` [PATCH V5 1/9] accel/kvm: Extract common KVM vCPU {creation, parking} code Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-12 14:36   ` [PATCH V5 1/9] accel/kvm: Extract common KVM vCPU {creation,parking} code Jonathan Cameron via
2023-10-12 14:36     ` Jonathan Cameron
2023-10-12 14:38     ` Salil Mehta via [this message]
2023-10-12 14:38       ` Salil Mehta
2023-10-16  2:45   ` [PATCH V5 1/9] accel/kvm: Extract common KVM vCPU {creation, parking} code Shaoqin Huang
2023-10-16  2:47   ` Shaoqin Huang
2023-10-11 19:43 ` [PATCH V5 2/9] hw/acpi: Move CPU ctrl-dev MMIO region len macro to common header file Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-11 19:43 ` [PATCH V5 3/9] hw/acpi: Add ACPI CPU hotplug init stub Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-11 19:43 ` [PATCH V5 4/9] hw/acpi: Init GED framework with CPU hotplug events Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-16  2:53   ` Shaoqin Huang
2023-10-16 10:01     ` Salil Mehta via
2023-10-16 10:01       ` Salil Mehta
2023-10-11 19:43 ` [PATCH V5 5/9] hw/acpi: Update CPUs AML with cpu-(ctrl)dev change Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-12 14:49   ` Jonathan Cameron via
2023-10-12 14:49     ` Jonathan Cameron
2023-10-11 19:43 ` [PATCH V5 6/9] hw/acpi: Update GED _EVT method AML with CPU scan Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-11 19:43 ` [PATCH V5 7/9] hw/acpi: Update ACPI GED framework to support vCPU Hotplug Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-11 19:43 ` [PATCH V5 8/9] physmem: Add helper function to destroy CPU AddressSpace Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-11 23:31   ` Gavin Shan
2023-10-12  0:04     ` Salil Mehta
2023-10-12  0:18       ` Gavin Shan
2023-10-12  9:22         ` Salil Mehta via
2023-10-12  9:22           ` Salil Mehta
2023-10-11 19:43 ` [PATCH V5 9/9] gdbstub: Add helper function to unregister GDB register space Salil Mehta via
2023-10-11 19:43   ` Salil Mehta
2023-10-12  0:07   ` Gavin Shan
2023-10-12  9:19     ` Salil Mehta via
2023-10-12  9:19       ` Salil Mehta
2023-10-13  3:58 ` [PATCH V5 0/9] Add architecture agnostic code to support vCPU Hotplug lixianglai
2023-10-13 10:21   ` Salil Mehta via
2023-10-13 10:21     ` Salil Mehta

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