| Message ID | 20231113201236.30668-1-salil.mehta@huawei.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Add architecture agnostic code to support vCPU Hotplug | expand |
On Mon, 13 Nov 2023 20:12:28 +0000 Salil Mehta <salil.mehta@huawei.com> wrote: [...] > physmem: Add helper function to destroy CPU AddressSpace > gdbstub: Add helper function to unregister GDB register space [...] above patches look like potential bugfixes (modulo they aren't getting used actually), only commit messages do not mention adverse effects (which they should do). Question is: do un-destroyed/registered CPU AS and GDB RS affect machines that already support cpu hot-unplug? (x86/s380/spapr)
On Mon, 13 Nov 2023 20:12:28 +0000 Salil Mehta <salil.mehta@huawei.com> wrote: > Virtual CPU hotplug support is being added across various architectures[1][3]. > This series adds various code bits common across all architectures: > > 1. vCPU creation and Parking code refactor [Patch 1] > 2. Update ACPI GED framework to support vCPU Hotplug [Patch 2,3] > 3. ACPI CPUs AML code change [Patch 4,5] > 4. Helper functions to support unrealization of CPU objects [Patch 6,7] > 5. Docs [Patch 8] [...] forgot to mention, you probably need to add to series migration code as well as it should be the same for both targets. (mostly copy-paste from q35 or piix4 and making sure it doesn't break old qemu (aka not enabled/sent over wire if cpu hotplug event is disabled))
Virtual CPU hotplug support is being added across various architectures[1][3]. This series adds various code bits common across all architectures: 1. vCPU creation and Parking code refactor [Patch 1] 2. Update ACPI GED framework to support vCPU Hotplug [Patch 2,3] 3. ACPI CPUs AML code change [Patch 4,5] 4. Helper functions to support unrealization of CPU objects [Patch 6,7] 5. Docs [Patch 8] Repository: [*] https://github.com/salil-mehta/qemu.git virt-cpuhp-armv8/rfc-v2.common.v7 Revision History: Patch-set V6 -> V7 1. Addressed Alex Bennée's comments - Updated the docs 2. Addressed Igor Mammedov's comments - Merged patches [Patch V6 3/9] & [Patch V6 7/9] with [Patch V6 4/9] - Updated commit-log of [Patch V6 1/9] and [Patch V6 5/9] 3. Added Shaoqin Huang's Reviewed-by tags for whole series. Link: https://lore.kernel.org/qemu-devel/20231013105129.25648-1-salil.mehta@huawei.com/ Patch-set V5 -> V6 1. Addressed Gavin Shan's comments - Fixed the assert() ranges of address spaces - Rebased the patch-set to latest changes in the qemu.git - Added Reviewed-by tags for patches {8,9} 2. Addressed Jonathan Cameron's comments - Updated commit-log for [Patch V5 1/9] with mention of trace events - Added Reviewed-by tags for patches {1,5} 3. Added Tested-by tags from Xianglai Li 4. Fixed checkpatch.pl error "Qemu -> QEMU" in [Patch V5 1/9] Link: https://lore.kernel.org/qemu-devel/20231011194355.15628-1-salil.mehta@huawei.com/ Patch-set V4 -> V5 1. Addressed Gavin Shan's comments - Fixed the trace events print string for kvm_{create,get,park,destroy}_vcpu - Added Reviewed-by tag for patch {1} 2. Added Shaoqin Huang's Reviewed-by tags for Patches {2,3} 3. Added Tested-by Tag from Vishnu Pajjuri to the patch-set 4. Dropped the ARM specific [Patch V4 10/10] Link: https://lore.kernel.org/qemu-devel/20231009203601.17584-1-salil.mehta@huawei.com/ Patch-set V3 -> V4 1. Addressed David Hilderbrand's comments - Fixed the wrong doc comment of kvm_park_vcpu API prototype - Added Reviewed-by tags for patches {2,4} Link: https://lore.kernel.org/qemu-devel/20231009112812.10612-1-salil.mehta@huawei.com/ Patch-set V2 -> V3 1. Addressed Jonathan Cameron's comments - Fixed 'vcpu-id' type wrongly changed from 'unsigned long' to 'integer' - Removed unnecessary use of variable 'vcpu_id' in kvm_park_vcpu - Updated [Patch V2 3/10] commit-log with details of ACPI_CPU_SCAN_METHOD macro - Updated [Patch V2 5/10] commit-log with details of conditional event handler method - Added Reviewed-by tags for patches {2,3,4,6,7} 2. Addressed Gavin Shan's comments - Remove unnecessary use of variable 'vcpu_id' in kvm_par_vcpu - Fixed return value in kvm_get_vcpu from -1 to -ENOENT - Reset the value of 'gdb_num_g_regs' in gdb_unregister_coprocessor_all - Fixed the kvm_{create,park}_vcpu prototypes docs - Added Reviewed-by tags for patches {2,3,4,5,6,7,9,10} 3. Addressed one earlier missed comment by Alex Bennée in RFC V1 - Added traces instead of DPRINTF in the newly added and some existing functions Link: https://lore.kernel.org/qemu-devel/20230930001933.2660-1-salil.mehta@huawei.com/ Patch-set V1 -> V2 1. Addressed Alex Bennée's comments - Refactored the kvm_create_vcpu logic to get rid of goto - Added the docs for kvm_{create,park}_vcpu prototypes - Splitted the gdbstub and AddressSpace destruction change into separate patches - Added Reviewed-by tags for patches {2,10} Link: https://lore.kernel.org/qemu-devel/20230929124304.13672-1-salil.mehta@huawei.com/ References: [1] https://lore.kernel.org/qemu-devel/20230926100436.28284-1-salil.mehta@huawei.com/ [2] https://lore.kernel.org/all/20230913163823.7880-1-james.morse@arm.com/ [3] https://lore.kernel.org/qemu-devel/cover.1695697701.git.lixianglai@loongson.cn/ Salil Mehta (8): accel/kvm: Extract common KVM vCPU {creation,parking} code hw/acpi: Move CPU ctrl-dev MMIO region len macro to common header file hw/acpi: Update ACPI GED framework to support vCPU Hotplug hw/acpi: Update GED _EVT method AML with CPU scan hw/acpi: Update CPUs AML with cpu-(ctrl)dev change physmem: Add helper function to destroy CPU AddressSpace gdbstub: Add helper function to unregister GDB register space docs/specs/acpi_hw_reduced_hotplug: Add the CPU Hotplug Event Bit accel/kvm/kvm-all.c | 64 ++++++++++++++++++++------ accel/kvm/trace-events | 4 ++ docs/specs/acpi_hw_reduced_hotplug.rst | 3 +- gdbstub/gdbstub.c | 12 +++++ hw/acpi/acpi-cpu-hotplug-stub.c | 6 +++ hw/acpi/cpu.c | 27 +++++++---- hw/acpi/generic_event_device.c | 21 +++++++++ hw/i386/acpi-build.c | 3 +- include/exec/cpu-common.h | 8 ++++ include/exec/gdbstub.h | 5 ++ include/hw/acpi/cpu.h | 5 +- include/hw/acpi/cpu_hotplug.h | 4 ++ include/hw/acpi/generic_event_device.h | 4 ++ include/hw/core/cpu.h | 1 + include/sysemu/kvm.h | 16 +++++++ system/physmem.c | 29 ++++++++++++ 16 files changed, 184 insertions(+), 28 deletions(-)