From: =?gb18030?B?V2FuZ2JlaQ==?= <wangbei@zju.edu.cn>
To: =?gb18030?B?eGVuLWRldmVs?= <xen-devel@lists.xen.org>
Subject: Question about get the user or kernel mode of vmx vcpu
Date: Thu, 6 Jun 2013 00:24:15 +0800 [thread overview]
Message-ID: <tencent_434FFDEC3836AFB043173957@qq.com> (raw)
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Hi,
This is Bei Wang, . I am doing research of spinlock optimization to deal with lock holder preemption.
I want to filter vcpu to make precise scheduling.If the vcpu of vmx hvm is running on user mode in guest,it will be filtered out.In linux-kvm £¬I use vmx_get_cpl function to get
But now i have a question to migrate the code into xen platform.I can't find any suitable function to judge cpl of vcpu.It seems that vmx_guest_x86_mode(arch/x86/hvm/vmx/vmx.c)don't output the mode of kernel or user in hvm.
So what should I do to get the vcpu cpl of vmx in xen? Can you give me some advice?
By the way ,my server is x86 architecture.(DELL T710),not IA64
Thank you very much :)
Wangbei
2013/6/5
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next reply other threads:[~2013-06-05 16:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-05 16:24 =?gb18030?B?V2FuZ2JlaQ==?= [this message]
2013-06-05 16:42 ` Question about get the user or kernel mode of vmx vcpu Andrew Cooper
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