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| author | Anthony Liguori | 2013-05-02 17:57:01 +0200 |
|---|---|---|
| committer | Anthony Liguori | 2013-05-02 17:57:01 +0200 |
| commit | 8ca27ce2e1150486ea2db4116a03706b28294f16 (patch) | |
| tree | 39a42b9ba7a4b1fc8db8c098fd24b08f39fee6ed /docs | |
| parent | Merge remote-tracking branch 'mjt/trivial-patches' into staging (diff) | |
| parent | Drop redundant resume_all_vcpus() from main() (diff) | |
| download | qemu-8ca27ce2e1150486ea2db4116a03706b28294f16.tar.gz qemu-8ca27ce2e1150486ea2db4116a03706b28294f16.tar.xz qemu-8ca27ce2e1150486ea2db4116a03706b28294f16.zip | |
Merge remote-tracking branch 'afaerber/qom-cpu' into staging
# By Igor Mammedov (21) and others
# Via Andreas Färber
* afaerber/qom-cpu: (29 commits)
Drop redundant resume_all_vcpus() from main()
cpus: Fix pausing TCG CPUs while in vCPU thread
target-i386: Replace cpuid_*features fields with a feature word array
target-i386: Break CPUID feature definition lines
target-i386/kvm.c: Code formatting changes
target-i386: Group together level, xlevel, xlevel2 fields
pc: Implement QEMUMachine::hot_add_cpu hook
QMP: Add cpu-add command
Add hot_add_cpu hook to QEMUMachine
target-i386: Move APIC to ICC bus
target-i386: Attach ICC bus to CPU on its creation
target-i386: Introduce ICC bus/device/bridge
cpu: Move cpu_write_elfXX_note() functions to CPUState
kvmvapic: Make dependency on sysbus.h explicit
target-i386: Replace MSI_SPACE_SIZE with APIC_SPACE_SIZE
target-i386: Do not allow to set apic-id once CPU is realized
target-i386: Introduce apic-id CPU property
target-i386: Introduce feat2prop() for CPU properties
acpi_piix4: Add infrastructure to send CPU hot-plug GPE to guest
cpu: Add helper cpu_exists(), to check if CPU with specified id exists
...
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/specs/acpi_cpu_hotplug.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/docs/specs/acpi_cpu_hotplug.txt b/docs/specs/acpi_cpu_hotplug.txt new file mode 100644 index 0000000000..5dec0c5010 --- /dev/null +++ b/docs/specs/acpi_cpu_hotplug.txt @@ -0,0 +1,22 @@ +QEMU<->ACPI BIOS CPU hotplug interface +-------------------------------------- + +QEMU supports CPU hotplug via ACPI. This document +describes the interface between QEMU and the ACPI BIOS. + +ACPI GPE block (IO ports 0xafe0-0xafe3, byte access): +----------------------------------------- + +Generic ACPI GPE block. Bit 2 (GPE.2) used to notify CPU +hot-add/remove event to ACPI BIOS, via SCI interrupt. + +CPU present bitmap (IO port 0xaf00-0xae1f, 1-byte access): +--------------------------------------------------------------- +One bit per CPU. Bit position reflects corresponding CPU APIC ID. +Read-only. + +CPU hot-add/remove notification: +----------------------------------------------------- +QEMU sets/clears corresponding CPU bit on hot-add/remove event. +CPU present map read by ACPI BIOS GPE.2 handler to notify OS of CPU +hot-(un)plug events. |