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RE: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology supp
From: |
Zengtao (B) |
Subject: |
RE: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support |
Date: |
Tue, 13 Oct 2020 12:11:20 +0000 |
Cc valentin
> -----Original Message-----
> From: Qemu-devel
> [mailto:qemu-devel-bounces+prime.zeng=hisilicon.com@nongnu.org]
> On Behalf Of Ying Fang
> Sent: Thursday, September 17, 2020 11:20 AM
> To: qemu-devel@nongnu.org
> Cc: peter.maydell@linaro.org; drjones@redhat.com; Zhanghailiang;
> Chenzhendong (alex); shannon.zhaosl@gmail.com;
> qemu-arm@nongnu.org; alistair.francis@wdc.com; fangying;
> imammedo@redhat.com
> Subject: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache
> topology support
>
> An accurate cpu topology may help improve the cpu scheduler's
> decision
> making when dealing with multi-core system. So cpu topology
> description
> is helpful to provide guest with the right view. Cpu cache information
> may
> also have slight impact on the sched domain, and even userspace
> software
> may check the cpu cache information to do some optimizations. Thus
> this patch
> series is posted to provide cpu and cache topology support for arm.
>
> To make the cpu topology consistent with MPIDR, an vcpu ioctl
For aarch64, the cpu topology don't depends on the MPDIR.
See https://patchwork.kernel.org/patch/11744387/
> KVM_ARM_SET_MP_AFFINITY is introduced so that userspace can set
> MPIDR
> according to the topology specified [1]. To describe the cpu topology
> both fdt and ACPI are supported. To describe the cpu cache
> information,
> a default cache hierarchy is given and can be made configurable later.
> The cpu topology is built according to processor hierarchy node
> structure.
> The cpu cache information is built according to cache type structure.
>
> This patch series is partially based on the patches posted by Andrew
> Jone
> years ago [2], I jumped in on it since some OS vendor cooperative
> partners
> are eager for it. Thanks for Andrew's contribution. Please feel free to
> reply
> to me if there is anything improper.
>
> [1] https://patchwork.kernel.org/cover/11781317
> [2]
> https://patchwork.ozlabs.org/project/qemu-devel/cover/2018070412
> 4923.32483-1-drjones@redhat.com
>
> Andrew Jones (2):
> device_tree: add qemu_fdt_add_path
> hw/arm/virt: DT: add cpu-map
>
> Ying Fang (10):
> linux headers: Update linux header with
> KVM_ARM_SET_MP_AFFINITY
> target/arm/kvm64: make MPIDR consistent with CPU Topology
> target/arm/kvm32: make MPIDR consistent with CPU Topology
> hw/arm/virt-acpi-build: distinguish possible and present cpus
> hw/acpi/aml-build: add processor hierarchy node structure
> hw/arm/virt-acpi-build: add PPTT table
> target/arm/cpu: Add CPU cache description for arm
> hw/arm/virt: add fdt cache information
> hw/acpi/aml-build: build ACPI CPU cache topology information
> hw/arm/virt-acpi-build: Enable CPU cache topology
>
> device_tree.c | 24 +++++++
> hw/acpi/aml-build.c | 68 +++++++++++++++++++
> hw/arm/virt-acpi-build.c | 99
> +++++++++++++++++++++++++--
> hw/arm/virt.c | 128
> ++++++++++++++++++++++++++++++++++-
> include/hw/acpi/acpi-defs.h | 14 ++++
> include/hw/acpi/aml-build.h | 11 +++
> include/hw/arm/virt.h | 1 +
> include/sysemu/device_tree.h | 1 +
> linux-headers/linux/kvm.h | 3 +
> target/arm/cpu.c | 42 ++++++++++++
> target/arm/cpu.h | 27 ++++++++
> target/arm/kvm32.c | 46 ++++++++++---
> target/arm/kvm64.c | 46 ++++++++++---
> 13 files changed, 488 insertions(+), 22 deletions(-)
>
> --
> 2.23.0
>
- RE: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support,
Zengtao (B) <=
- Re: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support, Andrew Jones, 2020/10/13
- Re: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support, Ying Fang, 2020/10/14
- Re: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support, Andrew Jones, 2020/10/15
- Re: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support, Ying Fang, 2020/10/16
- Re: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support, Andrew Jones, 2020/10/16
- Re: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support, Ying Fang, 2020/10/19
- Re: [RFC PATCH 00/12] hw/arm/virt: Introduce cpu and cache topology support, Andrew Jones, 2020/10/20