[SeaBIOS] [PATCH] KVM vcpu hotplug seabios infrastructure

[Liu, Jinsong]

Hi, Kevin, Gleb, Avi, and Yunhong

I have updated vcpu hotplug seabios infrastructure, as attached. Please kindly review it, thanks!

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This patch is to support KVM vcpu hotplug feature.
It ported from KVM bochs bios, and update some points to KVM seabios:
1. build ssdt with 15/255 processor obj, which separately support Win2000 and other oses;
2. build madt accordingly, protect it as 'E820_NVS', and keep madt checksum and lapic flag correctly when cpu hotplug;
3. define Processor under \_SB instead of \_PR, so that it works better with latest linux like 2.6.32 later;
4. for Processor _MAT method, explicitly transfer it 'ToBuffer' so that os will not confused with 'Integer' which will result in parse failure;
5. for Processor _STA method, use 0x0 instead of 0x9 for cpu hot-remove, which matchs better with ACPI 4.0 spec, and works better with latest linux;
6. add Processor _EJ0 method, so that 'eject' appear under linux /sys, and triggered by uevent to make cpu hot-remove;
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Thanks,
Jinsong

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