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Re: [Qemu-devel] [PATCH] allow update of MSR_EFER_SVM
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From: |
Bernhard Kauer |
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Subject: |
Re: [Qemu-devel] [PATCH] allow update of MSR_EFER_SVM |
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Date: |
Fri, 29 Feb 2008 16:43:14 +0100 |
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User-agent: |
Mutt/1.5.17+20080114 (2008-01-14) |
On Fri, Feb 29, 2008 at 11:20:24AM +0100, Alexander Graf wrote:
> Keep in mind that updating the bit should fail within a virtual machine.
I found the following sentence in the manual:
The effect of turning off EFER.SVME while a guest is running is
undefined;
therefore, the VMM should always prevent guests from writing EFER.
Therefore i think the wrmsr-code is just fine, as it is in my patch.
Bernhard Kauer