Re: [PATCH v2 3/10] KVM: MMU: fix direct sp's access corruptted
From: Avi Kivity
Date: Tue Jun 29 2010 - 05:13:40 EST
On 06/29/2010 12:04 PM, Xiao Guangrong wrote:
Simply replace (*spte& SPTE_NO_DIRTY) with a condition that checksIf the guest mapping is writable and it !dirty, we mark SPTE_NO_DIRTY flag in
whether sp->access is consistent with gw->pt(e)_access.
the spte, when the next #PF occurs, we just need check this flag and see whether
gpte's D bit is set, if it's true, we zap this spte and map to the correct sp.
My point is, SPTE_NO_DIRTY is equivalent to an sp->role.access check
(the access check is a bit slower, but that shouldn't matter).
Can you write a test case for qemu-kvm.git/kvm/test that demonstratesOK, but allow me do it later :-)
the problem and the fix? It will help ensure we don't regress in this
Sure, but please do it soon.
error compiling committee.c: too many arguments to function
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