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[Qemu-devel] [PATCH 00/15 v6 for 1.5] target-i386: CPU hot-add with cpu-
From: |
Igor Mammedov |
Subject: |
[Qemu-devel] [PATCH 00/15 v6 for 1.5] target-i386: CPU hot-add with cpu-add QMP command |
Date: |
Thu, 25 Apr 2013 16:05:22 +0200 |
Implements alternative way for hot-adding CPU using cpu-add QMP command,
which could be useful until it would be possible to add CPUs via device_add.
To hot-add CPU use following command from qmp-shell:
cpu-add id=[0..max-cpus - 1)
git tree for testing: https://github.com/imammedo/qemu/tree/cpu_add.v6
based on qom-cpu tree
v6->v5
* override hot_add_cpu hook statically
* extend and use memory_region_find() in IOAPIC
* s/signal_cpu_creation/tcg_signal_cpu_creation/
* add "since 1.5 to cpu-addQAPI schema description
v5->v4:
* style fixes
* new helper qemu_for_each_cpu()
* switch to qemu_for_each_cpu() in cpu_exists()
* "pc: update rtc ..." patch make depend it on "mc146818rtc: QOM'ify"
and use QOM cast style
* call CPU added notifier right before CPU becomes runable
* s/resume_vcpu/cpu_resume/
* acpi/piix4: add spec documentation for QEMU<->Seabios CPU hotplug
interface
* use error_propagate() in pc_new_cpu()
* skip cpu_exists() check in apic-id property setter if new value is
the same as current
* embed icc-bus inside icc-bridge and use qbus_create_inplace()
* move include/hw/i386/icc_bus.h into include/hw/cpu/
* make missing icc-bus fatal error for softmmu target
* split "move APIC to ICC bus" and "move IOAPIC to ICC bus" on smaller
patches
* use qdev_get_parent_bus() to get parent bus
* split "add cpu-add command..." on smaller patches
v4->v3:
* 'id' in cpu-add command will be a thread number instead of APIC ID
* split off resume_vcpu() into separate patch
* move notifier from rtc code into pc.c
v2->v3:
* use local error & propagate_error() instead of operating on
passed in errp in several places
* replace CPUClass.get_firmware_id() with CPUClass.get_arch_id()
* leave IOAPIC creation to board and just set bus to icc-bus
* include kvm-stub.o in cpu libary if no KVM is configured
* create resume_vcpu() stub and include it in libqemustub,
and use it directly instead of CPU method
* acpi_piix4: s/cpu_add_notifier/cpu_added_notifier/
v1->v2:
* generalize cpu sync to KVM, resume and hot-plug notification and
invoke them form CPUClass, to make available to all targets.
* introduce cpu_exists() and CPUClass.get_firmware_id() and use
the last one in acpi_piix to make code target independent.
* move IOAPIC to ICC bus, it was suggested and easy to convert.
* leave kvmvapic as SysBusDevice, it doesn't affect hot-plug and
created only once for all APIC instances. I haven't found yet
good/clean enough way to convert it to ICCDevice. May be follow-up
though.
* split one big ICC patch into several, one per converted device
* add cpu_hot_add hook to machine and implement it for target-i386,
instead of adding stabs. Could be used by other targets to
implement cpu-add.
* pre-allocate links<CPU> for all possible CPUs and make them available
at /machine/icc-bridge/cpu[0..N] QOM path, so users could find out
possible/free CPU IDs to use in cpu-add command.
Igor Mammedov (14):
exec: add qemu_for_each_cpu
cpu: add helper cpu_exists(), to check if CPU with specified id
exists
acpi_piix4: add infrastructure to send CPU hot-plug GPE to guest
target-i386: introduce apic-id property
target-i386: introduce ICC bus/device/bridge
target-i386: cpu: attach ICC bus to CPU on its creation
target-i386: replace MSI_SPACE_SIZE with APIC_SPACE_SIZE
target-i386: kvmvapic: make expilict dependency on sysbus.h
target-i386: move APIC to ICC bus
target-i386: move IOAPIC to ICC bus
pc: pass QEMUMachineInitArgs down to pc_cpus_init()
add hot_add_cpu hook to QEMUMachine and export machine_args
target-i386: implement machine->hot_add_cpu hook
QMP: add cpu-add command
Paolo Bonzini (1):
extend memory_region_find() and use it in kvm/ioapic
MAINTAINERS | 6 ++
cpus.c | 13 ++--
default-configs/i386-softmmu.mak | 1 +
default-configs/x86_64-softmmu.mak | 1 +
docs/specs/acpi_cpu_hotplug.txt | 22 +++++++
exec.c | 10 +++
hw/acpi/piix4.c | 90 ++++++++++++++++++++++++++-
hw/cpu/Makefile.objs | 1 +
hw/cpu/icc_bus.c | 120 ++++++++++++++++++++++++++++++++++++
hw/i386/kvm/apic.c | 2 +-
hw/i386/kvm/ioapic.c | 9 +++-
hw/i386/kvmvapic.c | 1 +
hw/i386/pc.c | 80 +++++++++++++++++++++---
hw/i386/pc_piix.c | 74 +++++++---------------
hw/i386/pc_q35.c | 31 +++++----
hw/intc/apic.c | 2 +-
hw/intc/apic_common.c | 18 ++++--
hw/intc/ioapic_common.c | 14 +++-
hw/xen/xen_apic.c | 2 +-
include/exec/memory.h | 13 ++--
include/hw/boards.h | 3 +
include/hw/cpu/icc_bus.h | 63 +++++++++++++++++++
include/hw/i386/apic_internal.h | 8 +--
include/hw/i386/ioapic_internal.h | 6 +-
include/hw/i386/pc.h | 4 +-
include/qom/cpu.h | 18 ++++++
memory.c | 20 +++++--
qapi-schema.json | 13 ++++
qmp-commands.hx | 23 +++++++
qmp.c | 10 +++
qom/cpu.c | 26 ++++++++
target-i386/cpu.c | 73 ++++++++++++++++++----
target-i386/cpu.h | 1 +
vl.c | 8 ++-
34 files changed, 656 insertions(+), 130 deletions(-)
create mode 100644 docs/specs/acpi_cpu_hotplug.txt
create mode 100644 hw/cpu/icc_bus.c
create mode 100644 include/hw/cpu/icc_bus.h