[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] Clear VMCS if reusing after vcpu reset
On 30/4/07 07:09, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote: > Clear whole page when VMCS is reused due to cpu hotplug. > construct_vmcs doesn't take care of all fields and some stale > content may make hardware unhappy. You almost certainly need to vmx_clear_vmcs() before you zap it, as there's no reason it might not be active on some CPU when vmx_create_vmcs() is called (domain_pause() does not deactivate VMCSs). Furthermore, this need to zap the page a second time is worrying. We only modify architectural state in the VMCS in a well-defined way. That shouldn't upset the hardware. Is this actually an indication that there is some architectural state that we are forgetting to re-initialise? If so then that's the bug which should be fixed. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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