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[Qemu-devel] [PATCH for-2.8 12/18] pc: apic_common: reset APIC ID to ini
From: |
Igor Mammedov |
Subject: |
[Qemu-devel] [PATCH for-2.8 12/18] pc: apic_common: reset APIC ID to initial ID when switching into x2APIC mode |
Date: |
Fri, 5 Aug 2016 11:46:11 +0200 |
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>
---
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 e246cf3..492afb3 100644
--- a/hw/intc/apic_common.c
+++ b/hw/intc/apic_common.c
@@ -39,6 +39,11 @@ 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] [PATCH for-2.8 03/18] tests: acpi: extend cphp testcase with numa check, (continued)
- [Qemu-devel] [PATCH for-2.8 03/18] tests: acpi: extend cphp testcase with numa check, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 02/18] acpi: provide _PXM method for CPU devices if QEMU is started numa enabled, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 05/18] pc: acpi: x2APIC support for MADT table, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 04/18] linux-headers: update to v4.8-rc1, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 06/18] pc: acpi: x2APIC support for SRAT table, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 08/18] acpi: cphp: force switch to modern cpu hotplug if APIC ID > 254, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 10/18] pc: apic_common: extend APIC ID property to 32bit, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 11/18] pc: apic_common: restore APIC ID to initial ID on reset, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 07/18] acpi: cphp: support x2APIC entry in cpu._MAT, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 09/18] pc: leave max apic_id_limit only in legacy cpu hotplug code, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 12/18] pc: apic_common: reset APIC ID to initial ID when switching into x2APIC mode,
Igor Mammedov <=
- [Qemu-devel] [PATCH for-2.8 13/18] pc: kvm_apic: pass APIC ID depending on xAPIC/x2APIC mode, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 14/18] pc: clarify FW_CFG_MAX_CPUS usage comment, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 16/18] pc: add 'etc/boot-cpus' fw_cfg file for machine with more than 255 CPUs, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 15/18] increase MAX_CPUMASK_BITS from 255 to 288, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 17/18] pc: add 2.8 machine, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 18/18] pc: q35: bump max_cpus to 288, Igor Mammedov, 2016/08/05
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Chao Gao, 2016/08/08