Message ID | 20211020142125.7516-1-wangyanan55@huawei.com |
---|---|
Headers | show |
Series | hw/arm/virt: Introduce cpu topology support | expand |
On 10/20/21 7:21 AM, Yanan Wang wrote: > 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 Queued to target-arm.next, thanks. r~ > > 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: 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: 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 >