[edk2-devel] [PATCH v4 0/9] support CPU hot-unplug
Ankur Arora
ankur.a.arora at oracle.com
Mon Jan 18 06:34:48 UTC 2021
Hi,
This series adds support for CPU hot-unplug with OVMF.
Please see this in conjunction with the QEMU secureboot hot-unplug v2
series posted here (now upstreamed):
https://lore.kernel.org/qemu-devel/20201207140739.3829993-1-imammedo@redhat.com/
Patches 1 and 3,
("OvmfPkg/CpuHotplugSmm: refactor hotplug logic")
("OvmfPkg/CpuHotplugSmm: add Qemu Cpu Status helper")
are either refactors or add support functions.
OvmfPkg/CpuHotplugSmm: introduce UnplugCpus()
OvmfPkg/CpuHotplugSmm: add CpuEject()
OvmfPkg/CpuHotplugSmm: add worker to do CPU ejection
Patch 2 and 9,
("OvmfPkg/CpuHotplugSmm: collect hot-unplug events")
("OvmfPkg/SmmControl2Dxe: negotiate CPU hot-unplug")
handle the QEMU protocol logic for collection of CPU hot-unplug events
or the protocol negotiation.
Patch 4,
("OvmfPkg/CpuHotplugSmm: introduce UnplugCpus()")
adds the MMI logic for CPU hot-unplug handling and informing
the PiSmmCpuDxeSmm of CPU removal.
Patches 5 and 6,
("OvmfPkg/CpuHotplugSmm: define CPU_HOT_EJECT_DATA")
("OvmfPkg/SmmCpuFeaturesLib: init CPU ejection state")
sets up state for doing the CPU ejection as part of hot-unplug.
Patches 7, and 8,
("OvmfPkg/CpuHotplugSmm: introduce UnplugCpus()")
("OvmfPkg/CpuHotplugSmm: add worker to do CPU ejection")
add the CPU ejection logic.
Testing (with QEMU 5.2.50):
- Stable with randomized CPU plug/unplug (guest maxcpus=1,8,128)
- Synthetic tests with simultaneous multi CPU hot-unplug
- Negotiation with/without CPU hotplug enabled
Also at:
github.com/terminus/edk2/ hot-unplug-v4
Changelog:
v4:
- Gets rid of unnecessary UefiCpuPkg changes
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.arora@oracle.com/
v2:
- Do the ejection via SmmCpuFeaturesRendezvousExit()
URL: https://patchew.org/EDK2/20210107195515.106158-1-ankur.a.arora@oracle.com/
RFC:
URL: https://patchew.org/EDK2/20201208053432.2690694-1-ankur.a.arora@oracle.com/
Please review.
Thanks
Ankur
Ankur Arora (9):
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/CpuHotplugSmm: add CpuEject()
OvmfPkg/CpuHotplugSmm: add worker to do CPU ejection
OvmfPkg/SmmControl2Dxe: negotiate CPU hot-unplug
OvmfPkg/CpuHotplugSmm/CpuHotplug.c | 435 ++++++++++++++++-----
OvmfPkg/CpuHotplugSmm/CpuHotplugSmm.inf | 1 +
OvmfPkg/CpuHotplugSmm/QemuCpuhp.c | 58 ++-
OvmfPkg/CpuHotplugSmm/QemuCpuhp.h | 6 +
OvmfPkg/Include/IndustryStandard/QemuCpuHotplug.h | 2 +
OvmfPkg/Include/Library/CpuHotEjectData.h | 31 ++
.../Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c | 62 +++
.../SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf | 3 +
OvmfPkg/OvmfPkg.dec | 6 +
OvmfPkg/SmmControl2Dxe/SmiFeatures.c | 25 +-
10 files changed, 527 insertions(+), 102 deletions(-)
create mode 100644 OvmfPkg/Include/Library/CpuHotEjectData.h
--
2.9.3
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