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RE: [PATCH 9/9] target/arm/kvm: Write CPU state back to KVM on reset
From: |
Salil Mehta |
Subject: |
RE: [PATCH 9/9] target/arm/kvm: Write CPU state back to KVM on reset |
Date: |
Fri, 29 Sep 2023 16:01:40 +0000 |
> From: Alex Bennée <alex.bennee@linaro.org>
> Sent: Friday, September 29, 2023 3:40 PM
> To: Salil Mehta <salil.mehta@huawei.com>
> Cc: qemu-devel@nongnu.org; qemu-arm@nongnu.org; maz@kernel.org; jean-
> philippe@linaro.org; Jonathan Cameron <jonathan.cameron@huawei.com>;
> 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;
> 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 9/9] target/arm/kvm: Write CPU state back to KVM on
> reset
>
>
> Salil Mehta <salil.mehta@huawei.com> writes:
>
> > From: Jean-Philippe Brucker <jean-philippe@linaro.org>
> >
> > When a KVM vCPU is reset following a PSCI CPU_ON call, its power state
> > is not synchronized with KVM at the moment. Because the vCPU is not
> > marked dirty, we miss the call to kvm_arch_put_registers() that writes
> > to KVM's MP_STATE. Force mp_state synchronization.
> >
> > Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
> > Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
>
> Seems reasonable:
>
> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Thanks
Salil.
- RE: [PATCH 3/9] hw/acpi: Add ACPI CPU hotplug init stub, (continued)
- [PATCH 4/9] hw/acpi: Init GED framework with cpu hotplug events, Salil Mehta, 2023/09/29
- [PATCH 5/9] hw/acpi: Update CPUs AML with cpu-(ctrl)dev change, Salil Mehta, 2023/09/29
- [PATCH 6/9] hw/acpi: Update GED _EVT method AML with cpu scan, Salil Mehta, 2023/09/29
- [PATCH 7/9] hw/acpi: Update ACPI GED framework to support vCPU Hotplug, Salil Mehta, 2023/09/29
- [PATCH 8/9] physmem, gdbstub: Add helper functions to help *unrealize* vCPU object, Salil Mehta, 2023/09/29
- [PATCH 9/9] target/arm/kvm: Write CPU state back to KVM on reset, Salil Mehta, 2023/09/29