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[Qemu-discuss] How to get linux guest with x2apic support
From: |
developer wang |
Subject: |
[Qemu-discuss] How to get linux guest with x2apic support |
Date: |
Fri, 24 Feb 2012 20:02:30 +0800 |
Hi,
I want to use QEMU (version 1.0) to emulate guest systems with x2APIC enabled.
Our host machine is running Debian 6, and the host system has x2APIC support.
I use the following command to run qemu:
qemu-system-x86_64 -nographic -cpu qemu64,+x2apic -serial mon:/dev/tty -hda ~/debian6.qcow2
After the guest (also Debian 6) boots up, I can't see x2apic in /proc/cpuinfo. What's the problem?
Our host machine's CPU features:
model name : Intel(R) Xeon(R) CPU E7- 4850 @ 2.00GHz
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 x2apic popcnt aes lahf_lm ida arat dts tpr_shadow vnmi flexpriority ept vpid
The CPU feature from the guest emulated by QEMU:
model name : QEMU Virtual CPU version 1.0,1
flags : fpu pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx lm up pni cx16 popcnt hypervisor lahf_lm svm abm sse4a
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