[PATCH] KVM: MMU: Write protect guest pages when a shadow is created for them
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>
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Linus Torvalds
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374cbac033
@ -133,6 +133,7 @@ static void FNAME(walk_addr)(struct guest_walker *walker,
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walker->level - 1, table_gfn);
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}
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walker->ptep = ptep;
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pgprintk("%s: pte %llx\n", __FUNCTION__, (u64)*ptep);
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}
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static void FNAME(release_walker)(struct guest_walker *walker)
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