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[Qemu-devel] [PULL 18/28] pc: Forbid BSP removal
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PULL 18/28] pc: Forbid BSP removal |
Date: |
Wed, 20 Jul 2016 12:08:24 -0300 |
From: Igor Mammedov <address@hidden>
Boot CPU is assumed to always present in QEMU code, so
untile that assumptions are gone, deny removal request,
In another words QEMU won't support BSP hot-unplug.
Signed-off-by: Igor Mammedov <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
---
hw/i386/pc.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index f4c6a27..dd5661a 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1803,10 +1803,18 @@ out:
static void pc_cpu_unplug_request_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
+ int idx = -1;
HotplugHandlerClass *hhc;
Error *local_err = NULL;
PCMachineState *pcms = PC_MACHINE(hotplug_dev);
+ pc_find_cpu_slot(pcms, CPU(dev), &idx);
+ assert(idx != -1);
+ if (idx == 0) {
+ error_setg(&local_err, "Boot CPU is unpluggable");
+ goto out;
+ }
+
hhc = HOTPLUG_HANDLER_GET_CLASS(pcms->acpi_dev);
hhc->unplug_request(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err);
--
2.5.5
- [Qemu-devel] [PULL 08/28] pc: Extract CPU lookup into a separate function, (continued)
- [Qemu-devel] [PULL 08/28] pc: Extract CPU lookup into a separate function, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 09/28] pc: cpu: Consolidate apic-id validity checks in pc_cpu_pre_plug(), Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 10/28] target-i386: Replace custom apic-id setter/getter with static property, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 11/28] target-i386: Add socket/core/thread properties to X86CPU, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 12/28] target-i386: Add support for UMIP and RDPID CPUID bits, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 13/28] target-i386: cpu: Do not ignore error and fix apic parent, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 14/28] target-i386: Fix apic object leak when CPU is deleted, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 15/28] pc: Set APIC ID based on socket/core/thread ids if it's not been set yet, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 16/28] pc: Delay setting number of boot CPUs to machine_done time, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 17/28] pc: Register created initial and hotpluged CPUs in one place pc_cpu_plug(), Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 18/28] pc: Forbid BSP removal,
Eduardo Habkost <=
- [Qemu-devel] [PULL 19/28] pc: Enforce adding CPUs contiguously and removing them in opposite order, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 20/28] pc: cpu: Allow device_add to be used with x86 cpu, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 21/28] pc: Implement query-hotpluggable-cpus callback, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 22/28] apic: move MAX_APICS check to 'apic' class, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 23/28] apic: Drop APICCommonState.idx and use APIC ID as index in local_apics[], Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 25/28] (kvm)apic: Add unrealize callbacks, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 24/28] apic: kvm-apic: Fix crash due to access to freed memory region, Eduardo Habkost, 2016/07/20
- [Qemu-devel] [PULL 26/28] apic: Use apic_id as apic's migration instance_id, Eduardo Habkost, 2016/07/20