[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PULL v2 07/16] pc: apic_common: Reset APIC ID to initial I
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PULL v2 07/16] pc: apic_common: Reset APIC ID to initial ID when switching into x2APIC mode |
Date: |
Mon, 24 Oct 2016 17:52:16 -0200 |
From: Igor Mammedov <address@hidden>
SDM: x2APIC State Transitions:
State Changes From xAPIC Mode to x2APIC Mode
"
Any APIC ID value written to the memory-mapped
local APIC ID register is not preserved
"
Signed-off-by: Igor Mammedov <address@hidden>
Reviewed-by: Radim Krčmář <address@hidden>
Reviewed-by: Eduardo Habkost <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
---
hw/intc/apic_common.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
index ea3c8ca..d78c885 100644
--- a/hw/intc/apic_common.c
+++ b/hw/intc/apic_common.c
@@ -40,6 +40,11 @@ void cpu_set_apic_base(DeviceState *dev, uint64_t val)
if (dev) {
APICCommonState *s = APIC_COMMON(dev);
APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+ /* switching to x2APIC, reset possibly modified xAPIC ID */
+ if (!(s->apicbase & MSR_IA32_APICBASE_EXTD) &&
+ (val & MSR_IA32_APICBASE_EXTD)) {
+ s->id = s->initial_apic_id;
+ }
info->set_base(s, val);
}
}
--
2.7.4
- [Qemu-devel] [PULL v2 00/16] x86 and CPU queue, 2016-10-24, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 01/16] pc: acpi: x2APIC support for MADT table and _MAT method, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 02/16] pc: acpi: x2APIC support for SRAT table, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 03/16] acpi: cphp: Force switch to modern cpu hotplug if APIC ID > 254, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 04/16] pc: Leave max apic_id_limit only in legacy cpu hotplug code, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 06/16] pc: apic_common: Restore APIC ID to initial ID on reset, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 05/16] pc: apic_common: Extend APIC ID property to 32bit, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 08/16] pc: kvm_apic: Pass APIC ID depending on xAPIC/x2APIC mode, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 07/16] pc: apic_common: Reset APIC ID to initial ID when switching into x2APIC mode,
Eduardo Habkost <=
- [Qemu-devel] [PULL v2 09/16] pc: Clarify FW_CFG_MAX_CPUS usage comment, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 10/16] Increase MAX_CPUMASK_BITS from 255 to 288, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 11/16] pc: Add 'etc/boot-cpus' fw_cfg file for machine with more than 255 CPUs, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 13/16] pc: q35: Bump max_cpus to 288, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 12/16] pc: Require IRQ remapping and EIM if there could be x2APIC CPUs, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 14/16] exec: split cpu_exec_init(), Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 16/16] exec: call cpu_exec_exit() from a CPU unrealize common function, Eduardo Habkost, 2016/10/24
- [Qemu-devel] [PULL v2 15/16] exec: move cpu_exec_init() calls to realize functions, Eduardo Habkost, 2016/10/24
- Re: [Qemu-devel] [PULL v2 00/16] x86 and CPU queue, 2016-10-24, Peter Maydell, 2016/10/25