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[PATCH] KVM: MMU: Write protect guest pages when a shadow is created for them

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When we cache a guest page table into a shadow page table, we need to prevent
further access to that page by the guest, as that would render the cache
incoherent.

Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Avi Kivity
2007-01-05 16:36:43 -08:00
committed by Linus Torvalds
parent cea0f0e7ea
commit 374cbac033
2 changed files with 56 additions and 19 deletions
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drivers/kvm/paging_tmpl.h
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@ -133,6 +133,7 @@ static void FNAME(walk_addr)(struct guest_walker *walker,
walker->level - 1, table_gfn);
}
walker->ptep = ptep;
pgprintk("%s: pte %llx\n", __FUNCTION__, (u64)*ptep);
}
static void FNAME(release_walker)(struct guest_walker *walker)