| Message ID | 20240607115649.214622-1-salil.mehta@huawei.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Add architecture agnostic code to support vCPU Hotplug | expand |
On Fri, Jun 07, 2024 at 12:56:41PM +0100, Salil Mehta 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] Igor - it's been a while. Looks ok to me superficially. Do you plan to review? > > Repository: > > [*] https://github.com/salil-mehta/qemu.git virt-cpuhp-armv8/rfc-v3.arch.agnostic.v13 > > NOTE: This series is meant to work in conjunction with Architecture specific patch-set. > For ARM, a combined patch-set (arch agnostic + specific) was earlier pushed as RFC V2[1]. > A ARM architecture specific patch-set (subset of RFC V2) is being finalized and shall > be floated soon as RFC-V3. Please find a version of it compatible with this patch-set at > the below location. (TCG support is broken in below and is being fixed) > > [*] https://github.com/salil-mehta/qemu/tree/virt-cpuhp-armv8/rfc-v3-rc2 > > > Revision History: > > Patch-set V12 -> V13 > 1. Added Reviewed-by Tag of Harsh Prateek Bora's (IBM) [PATCH V12 1/8] > 2. Moved the kvm_{create,park,unpark}_vcpu prototypes from accel/kvm/kvm-cpus.h > to include/sysemu/kvm.h. These can later be exported through AccelOps. > Link: https://lore.kernel.org/qemu-devel/62f55169-1796-4d8e-a35d-7f003a172750@linux.ibm.com/ > > Patch-set V11 -> V12 > 1. Addressed Harsh Prateek Bora's (IBM) comment > - Changed @cpu to @vcpu_id in the kvm_unpark_vcpu protoype header/ > 2. Added Zhao Liu's (Intel) Tested-by for whole series > - Qtest does not breaks on Intel platforms now. > 3. Added Zhao Liu's (Intel) Reviewed-by for [PATCH V11 {1/8 - 3/8}] > Link: https://lore.kernel.org/qemu-devel/ZlRSPuJGBgyEUW6w@intel.com/ > Link: https://lore.kernel.org/qemu-devel/a5f3d78e-cfed-441f-9c56-e3e78fa5edee@linux.ibm.com/ > > Patch-set V10 -> V11 > 1. Addressed Nicholas Piggin's (IBM) comment > - moved the traces in kvm_unpark_vcpu and kvm_create_vcpu at the end > - Added the Reviewed-by Tag for [PATCH V10 1/8] > 2. Addressed Alex Bennée's (Linaro) comments > - Added a note explaining dependency of the [PATCH V10 7/8] on Arch specific patch-set > Link: https://lore.kernel.org/qemu-devel/D1FS5GOOFWWK.2PNRIVL0V6DBL@gmail.com/ > Link: https://lore.kernel.org/qemu-devel/87frubi402.fsf@draig.linaro.org/ > > Patch-set V9 -> V10 > 1. Addressed Nicholas Piggin's (IBM) & Philippe Mathieu-Daudé (Linaro) comments > - carved out kvm_unpark_vcpu and added its trace > - Widened the scope of the kvm_unpark_vcpu so that it can be used by generic framework > being thought out > Link: https://lore.kernel.org/qemu-devel/20240519210620.228342-1-salil.mehta@huawei.com/ > Link: https://lore.kernel.org/qemu-devel/e94b0e14-efee-4050-9c9f-08382a36b63a@linaro.org/ > > Patch-set V8 -> V9 > 1. Addressed Vishnu Pajjuri's (Ampere) comments > - Added kvm_fd to trace in kvm_create_vcpu > - Some clean ups: arch vcpu-id and sbd variable > - Added the missed initialization of cpu->gdb_num_regs > 2. Addressed the commnet from Zhao Liu (Intel) > - Make initialization of CPU Hotplug state conditional (possible_cpu_arch_ids!=NULL) > Link: https://lore.kernel.org/qemu-devel/20240312020000.12992-1-salil.mehta@huawei.com/ > > Patch-set V7 -> V8 > 1. Rebased and Fixed the conflicts > > 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 | 95 +++++++++++++++++--------- > accel/kvm/kvm-cpus.h | 1 - > accel/kvm/trace-events | 5 +- > docs/specs/acpi_hw_reduced_hotplug.rst | 3 +- > gdbstub/gdbstub.c | 13 ++++ > hw/acpi/acpi-cpu-hotplug-stub.c | 6 ++ > hw/acpi/cpu.c | 33 ++++++--- > hw/acpi/generic_event_device.c | 21 ++++++ > hw/core/cpu-common.c | 1 - > hw/i386/acpi-build.c | 3 +- > include/exec/cpu-common.h | 8 +++ > include/exec/gdbstub.h | 6 ++ > 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 | 25 +++++++ > system/physmem.c | 29 ++++++++ > 18 files changed, 214 insertions(+), 49 deletions(-) > > -- > 2.34.1
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-v3.arch.agnostic.v13 NOTE: This series is meant to work in conjunction with Architecture specific patch-set. For ARM, a combined patch-set (arch agnostic + specific) was earlier pushed as RFC V2[1]. A ARM architecture specific patch-set (subset of RFC V2) is being finalized and shall be floated soon as RFC-V3. Please find a version of it compatible with this patch-set at the below location. (TCG support is broken in below and is being fixed) [*] https://github.com/salil-mehta/qemu/tree/virt-cpuhp-armv8/rfc-v3-rc2 Revision History: Patch-set V12 -> V13 1. Added Reviewed-by Tag of Harsh Prateek Bora's (IBM) [PATCH V12 1/8] 2. Moved the kvm_{create,park,unpark}_vcpu prototypes from accel/kvm/kvm-cpus.h to include/sysemu/kvm.h. These can later be exported through AccelOps. Link: https://lore.kernel.org/qemu-devel/62f55169-1796-4d8e-a35d-7f003a172750@linux.ibm.com/ Patch-set V11 -> V12 1. Addressed Harsh Prateek Bora's (IBM) comment - Changed @cpu to @vcpu_id in the kvm_unpark_vcpu protoype header/ 2. Added Zhao Liu's (Intel) Tested-by for whole series - Qtest does not breaks on Intel platforms now. 3. Added Zhao Liu's (Intel) Reviewed-by for [PATCH V11 {1/8 - 3/8}] Link: https://lore.kernel.org/qemu-devel/ZlRSPuJGBgyEUW6w@intel.com/ Link: https://lore.kernel.org/qemu-devel/a5f3d78e-cfed-441f-9c56-e3e78fa5edee@linux.ibm.com/ Patch-set V10 -> V11 1. Addressed Nicholas Piggin's (IBM) comment - moved the traces in kvm_unpark_vcpu and kvm_create_vcpu at the end - Added the Reviewed-by Tag for [PATCH V10 1/8] 2. Addressed Alex Bennée's (Linaro) comments - Added a note explaining dependency of the [PATCH V10 7/8] on Arch specific patch-set Link: https://lore.kernel.org/qemu-devel/D1FS5GOOFWWK.2PNRIVL0V6DBL@gmail.com/ Link: https://lore.kernel.org/qemu-devel/87frubi402.fsf@draig.linaro.org/ Patch-set V9 -> V10 1. Addressed Nicholas Piggin's (IBM) & Philippe Mathieu-Daudé (Linaro) comments - carved out kvm_unpark_vcpu and added its trace - Widened the scope of the kvm_unpark_vcpu so that it can be used by generic framework being thought out Link: https://lore.kernel.org/qemu-devel/20240519210620.228342-1-salil.mehta@huawei.com/ Link: https://lore.kernel.org/qemu-devel/e94b0e14-efee-4050-9c9f-08382a36b63a@linaro.org/ Patch-set V8 -> V9 1. Addressed Vishnu Pajjuri's (Ampere) comments - Added kvm_fd to trace in kvm_create_vcpu - Some clean ups: arch vcpu-id and sbd variable - Added the missed initialization of cpu->gdb_num_regs 2. Addressed the commnet from Zhao Liu (Intel) - Make initialization of CPU Hotplug state conditional (possible_cpu_arch_ids!=NULL) Link: https://lore.kernel.org/qemu-devel/20240312020000.12992-1-salil.mehta@huawei.com/ Patch-set V7 -> V8 1. Rebased and Fixed the conflicts 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 | 95 +++++++++++++++++--------- accel/kvm/kvm-cpus.h | 1 - accel/kvm/trace-events | 5 +- docs/specs/acpi_hw_reduced_hotplug.rst | 3 +- gdbstub/gdbstub.c | 13 ++++ hw/acpi/acpi-cpu-hotplug-stub.c | 6 ++ hw/acpi/cpu.c | 33 ++++++--- hw/acpi/generic_event_device.c | 21 ++++++ hw/core/cpu-common.c | 1 - hw/i386/acpi-build.c | 3 +- include/exec/cpu-common.h | 8 +++ include/exec/gdbstub.h | 6 ++ 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 | 25 +++++++ system/physmem.c | 29 ++++++++ 18 files changed, 214 insertions(+), 49 deletions(-)