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authorMarcelo Tosatti <mtosatti@redhat.com>2008-09-23 12:18:39 -0400
committerAvi Kivity <avi@redhat.com>2008-10-15 08:25:25 -0400
commit4731d4c7a07769cf2926c327177b97bb8c68cafc (patch)
treec732e9de4dbb35c74c158962771b6804dd8db153 /include/asm-x86
parent6844dec6948679d084f054235fee19ba4e3a3096 (diff)
KVM: MMU: out of sync shadow core
Allow guest pagetables to go out of sync. Instead of emulating write accesses to guest pagetables, or unshadowing them, we un-write-protect the page table and allow the guest to modify it at will. We rely on invlpg executions to synchronize individual ptes, and will synchronize the entire pagetable on tlb flushes. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'include/asm-x86')
-rw-r--r--include/asm-x86/kvm_host.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 8b935cc4c14b..7d36fcc02818 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -195,6 +195,8 @@ struct kvm_mmu_page {
195 */ 195 */
196 int multimapped; /* More than one parent_pte? */ 196 int multimapped; /* More than one parent_pte? */
197 int root_count; /* Currently serving as active root */ 197 int root_count; /* Currently serving as active root */
198 bool unsync;
199 bool unsync_children;
198 union { 200 union {
199 u64 *parent_pte; /* !multimapped */ 201 u64 *parent_pte; /* !multimapped */
200 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */ 202 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
@@ -371,6 +373,7 @@ struct kvm_vm_stat {
371 u32 mmu_flooded; 373 u32 mmu_flooded;
372 u32 mmu_recycled; 374 u32 mmu_recycled;
373 u32 mmu_cache_miss; 375 u32 mmu_cache_miss;
376 u32 mmu_unsync;
374 u32 remote_tlb_flush; 377 u32 remote_tlb_flush;
375 u32 lpages; 378 u32 lpages;
376}; 379};