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| author | Igor Mammedov | 2020-09-23 11:46:40 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin | 2020-09-29 08:15:24 +0200 |
| commit | 00dc02d284eab0890936ec47c0b7baba5e3b4e37 (patch) | |
| tree | 7b58e18a411cc3cbc3d5058268cb26c374821c80 /include/hw/i386 | |
| parent | virtio: update MemoryRegionCaches when guest set bad features (diff) | |
| download | qemu-00dc02d284eab0890936ec47c0b7baba5e3b4e37.tar.gz qemu-00dc02d284eab0890936ec47c0b7baba5e3b4e37.tar.xz qemu-00dc02d284eab0890936ec47c0b7baba5e3b4e37.zip | |
x86: lpc9: let firmware negotiate 'CPU hotplug with SMI' features
It will allow firmware to notify QEMU that firmware requires SMI
being triggered on CPU hot[un]plug, so that it would be able to account
for hotplugged CPU and relocate it to new SMM base and/or safely remove
CPU on unplug.
Using negotiated features, follow up patches will insert SMI upcall
into AML code, to make sure that firmware processes hotplug before
guest OS would attempt to use new CPU.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20200923094650.1301166-2-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw/i386')
| -rw-r--r-- | include/hw/i386/ich9.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/i386/ich9.h b/include/hw/i386/ich9.h index 48b442bc0b..703d56036a 100644 --- a/include/hw/i386/ich9.h +++ b/include/hw/i386/ich9.h @@ -247,5 +247,7 @@ struct ICH9LPCState { /* bit positions used in fw_cfg SMI feature negotiation */ #define ICH9_LPC_SMI_F_BROADCAST_BIT 0 +#define ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT 1 +#define ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT 2 #endif /* HW_ICH9_H */ |