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[PATCH v9 0/8] hw/arm/virt: Introduce cpu topology support
From: |
Yanan Wang |
Subject: |
[PATCH v9 0/8] hw/arm/virt: Introduce cpu topology support |
Date: |
Wed, 20 Oct 2021 22:21:17 +0800 |
Hi,
This is the latest v9 series which supports exposing vCPU topology
to the guest for Arm virt machines.
Description of this series:
Once the view of an accurate virtual cpu topology is provided to guest,
with a well-designed vCPU pinning to the pCPU we may get a huge benefit,
e.g., the scheduling performance improvement. See Dario Faggioli's
research and the related performance tests in [1] for reference.
This patch series introduces cpu topology support for Arm platform.
Both cpu-map in DT and ACPI PPTT table are introduced to store the
topology information. And we only describe the topology information
to 6.2 and newer virt machines, considering compatibility.
[1]
https://kvmforum2020.sched.com/event/eE1y/virtual-topology-for-virtual-machines
-friend-or-foe-dario-faggioli-suse
Changelog:
v8->v9:
- add Eric's R-bs, thanks!
- address Eric's suggestions to update some function comments and commit msg
(patch #5)
- make build_processor_hierarchy_node static as it's only used by build_pptt
(patch #4)
- retested.
- v8:
20211014132206.19220-1-wangyanan55@huawei.com/">https://lore.kernel.org/qemu-devel/20211014132206.19220-1-wangyanan55@huawei.com/
v7->v8:
- rebased on top of master (commit e5b2333f24)
- only add one generic expected file for PPTT instead of four, which works
fine enough for now (patch #6 and #8 updated)
- v7:
20211007030746.10420-1-wangyanan55@huawei.com/">https://lore.kernel.org/qemu-devel/20211007030746.10420-1-wangyanan55@huawei.com/
v6->v7:
- rebased on top of master (commit ca61fa4b80)
- use newly introduced acpi_table_begin/acpi_table_end APIs to build PPTT
(patch #5 updated)
- add reference files for PPTT to fix broken bios-table-test for Aarch64
virt machine (patch #6-#8 added)
- v6:
https://lore.kernel.org/qemu-devel/20210824122016.144364-1-wangyanan55@huawei.com/
Andrew Jones (2):
hw/arm/virt: Add cpu-map to device tree
hw/acpi/aml-build: Add PPTT table
Yanan Wang (6):
hw/arm/virt: Only describe cpu topology since virt-6.2
device_tree: Add qemu_fdt_add_path
hw/acpi/aml-build: Add Processor hierarchy node structure
tests/data/acpi/virt: Add an empty expected file for PPTT
hw/arm/virt-acpi-build: Generate PPTT table
tests/data/acpi/virt: Update the empty expected file for PPTT
hw/acpi/aml-build.c | 89 +++++++++++++++++++++++++++++++++++
hw/arm/virt-acpi-build.c | 8 +++-
hw/arm/virt.c | 71 ++++++++++++++++++++++++----
include/hw/acpi/aml-build.h | 3 ++
include/hw/arm/virt.h | 4 +-
include/sysemu/device_tree.h | 1 +
softmmu/device_tree.c | 44 ++++++++++++++++-
tests/data/acpi/virt/PPTT | Bin 0 -> 76 bytes
8 files changed, 206 insertions(+), 14 deletions(-)
create mode 100644 tests/data/acpi/virt/PPTT
--
2.19.1
- [PATCH v9 0/8] hw/arm/virt: Introduce cpu topology support,
Yanan Wang <=
- [PATCH v9 1/8] hw/arm/virt: Only describe cpu topology since virt-6.2, Yanan Wang, 2021/10/20
- [PATCH v9 4/8] hw/acpi/aml-build: Add Processor hierarchy node structure, Yanan Wang, 2021/10/20
- [PATCH v9 2/8] device_tree: Add qemu_fdt_add_path, Yanan Wang, 2021/10/20
- [PATCH v9 8/8] tests/data/acpi/virt: Update the empty expected file for PPTT, Yanan Wang, 2021/10/20
- [PATCH v9 7/8] hw/arm/virt-acpi-build: Generate PPTT table, Yanan Wang, 2021/10/20
- [PATCH v9 5/8] hw/acpi/aml-build: Add PPTT table, Yanan Wang, 2021/10/20
- [PATCH v9 3/8] hw/arm/virt: Add cpu-map to device tree, Yanan Wang, 2021/10/20
- [PATCH v9 6/8] tests/data/acpi/virt: Add an empty expected file for PPTT, Yanan Wang, 2021/10/20