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| From: | Dor Laor |
| Subject: | Re: [Qemu-devel] cpuid problem in upstream qemu with kvm |
| Date: | Wed, 06 Jan 2010 16:48:38 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091209 Fedora/3.0-4.fc12 Lightning/1.0pre Thunderbird/3.0 ThunderBrowse/3.2.6.8 |
On 01/06/2010 04:32 PM, Avi Kivity wrote:
On 01/06/2010 04:22 PM, Michael S. Tsirkin wrote:We can probably default -enable-kvm to -cpu host, as long as we explain very carefully that if users wish to preserve cpu features across upgrades, they can't depend on the default.Hardware upgrades or software upgrades?Yes.
I just want to remind all the the main motivation for using -cpu realModelThatWasOnceShiped is to provide correct cpu emulation for the guest. Using a random qemu|kvm64+flag1-flag2 might really cause trouble for the guest OS or guest apps.
On top of -cpu nehalem we can always add fancy features like x2apic, etc.
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