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[Xen-devel] AMD SVM question (svm_asid_g_invlpg)

from [Gianluca Guida]

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Subject:	[Xen-devel] AMD SVM question (svm_asid_g_invlpg)
From:	Gianluca Guida <gianluca.guida@xxxxxxxxxxxxx>
Date:	Tue, 17 Mar 2009 14:14:30 +0000
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Hello,

SVM code doesn't use the INVLPGA instruction, but rather invalidate thewhole ASID when invalidating a guest page.

INVLPG exit is enabled only on shadow code, which is smart enough tohandle corner cases like splintered pagetables invlpg's.

Is this a workaround for some buggy hardware? Is there any problem inenabling the INVLPGA instruction?


Thanks,
Gianluca

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