Hi, This series adds OVMF support for CPU hot-unplug.
QEMU secureboot hot-unplug logic corresponding to this is in upstream. Also posted here: https://lore.kernel.org/qemu-devel/20201207140739.3829993-1-imamm...@redhat.com/ Testing (with QEMU 5.2.50): - Stable with randomized CPU plug/unplug (guest maxcpus=33,128) - Synthetic tests with simultaneous multi CPU hot-unplug Also at: github.com/terminus/edk2/ hot-unplug-v7 Changelog: v7: - Address review comments from v6. - Fix ejection bug where we were using APIC ID to do the ejection rather than the Qemu Selector. - Describes safety properties and ordering needed for concurrent accesses to CPU_HOT_EJECT_DATA->QemuSelectorMap, and CPU_HOT_EJECT_DATA->Handler, v6: - addresses v5 review comments. URL: https://patchew.org/EDK2/20210129005950.467638-1-ankur.a.ar...@oracle.com/ v5: - fixes ECC errors (all but one in "OvmfPkg/CpuHotplugSmm: add add Qemu Cpu Status helper"). URL: https://patchew.org/EDK2/20210126064440.299596-1-ankur.a.ar...@oracle.com/ v4: - Gets rid of unnecessary UefiCpuPkg changes URL: https://patchew.org/EDK2/20210118063457.358581-1-ankur.a.ar...@oracle.com/ v3: - Use a saner PCD based interface to share state between PiSmmCpuDxeSmm and OvmfPkg/CpuHotplugSmm - Cleaner split of the hot-unplug code URL: https://patchew.org/EDK2/20210115074533.277448-1-ankur.a.ar...@oracle.com/ v2: - Do the ejection via SmmCpuFeaturesRendezvousExit() URL: https://patchew.org/EDK2/20210107195515.106158-1-ankur.a.ar...@oracle.com/ RFC: URL: https://patchew.org/EDK2/20201208053432.2690694-1-ankur.a.ar...@oracle.com/ Please review. Thanks Ankur Ankur Arora (10): OvmfPkg/CpuHotplugSmm: refactor hotplug logic OvmfPkg/CpuHotplugSmm: collect hot-unplug events OvmfPkg/CpuHotplugSmm: add Qemu Cpu Status helper OvmfPkg/CpuHotplugSmm: introduce UnplugCpus() OvmfPkg/CpuHotplugSmm: define CPU_HOT_EJECT_DATA OvmfPkg/SmmCpuFeaturesLib: init CPU ejection state OvmfPkg/SmmCpuFeaturesLib: call CPU hot-eject handler OvmfPkg/CpuHotplugSmm: add EjectCpu() OvmfPkg/CpuHotplugSmm: do actual CPU hot-eject OvmfPkg/SmmControl2Dxe: negotiate CPU hot-unplug OvmfPkg/OvmfPkg.dec | 4 + OvmfPkg/CpuHotplugSmm/CpuHotplugSmm.inf | 2 + .../SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf | 4 + OvmfPkg/CpuHotplugSmm/QemuCpuhp.h | 7 + OvmfPkg/Include/IndustryStandard/QemuCpuHotplug.h | 2 + OvmfPkg/Include/Pcd/CpuHotEjectData.h | 52 ++ OvmfPkg/CpuHotplugSmm/CpuHotplug.c | 578 +++++++++++++++++---- OvmfPkg/CpuHotplugSmm/QemuCpuhp.c | 106 +++- .../Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c | 136 +++++ OvmfPkg/SmmControl2Dxe/SmiFeatures.c | 18 +- 10 files changed, 789 insertions(+), 120 deletions(-) create mode 100644 OvmfPkg/Include/Pcd/CpuHotEjectData.h -- 2.9.3 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#71828): https://edk2.groups.io/g/devel/message/71828 Mute This Topic: https://groups.io/mt/80751391/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
