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authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2011-07-12 03:32:13 +0800
committerAvi Kivity <avi@redhat.com>2011-07-24 11:50:38 +0300
commitc2a2ac2b563ccc3a69540965b5a994c19e3817d7 (patch)
tree83e3c35da3b9e696f77d08d6ab757bae606dd975 /arch/x86/include/asm
parent603e0651cfc8562b103454d7ded71f3ad1eb3a37 (diff)
KVM: MMU: lockless walking shadow page table
Use rcu to protect shadow pages table to be freed, so we can safely walk it, it should run fastly and is needed by mmio page fault Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
-rw-r--r--arch/x86/include/asm/kvm_host.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a198a5b2f04e..dd51c83aa5de 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -233,6 +233,12 @@ struct kvm_mmu_page {
unsigned int unsync_children;
unsigned long parent_ptes; /* Reverse mapping for parent_pte */
DECLARE_BITMAP(unsync_child_bitmap, 512);
+
+#ifdef CONFIG_X86_32
+ int clear_spte_count;
+#endif
+
+ struct rcu_head rcu;
};
struct kvm_pv_mmu_op_buffer {
@@ -486,6 +492,8 @@ struct kvm_arch {
u64 hv_guest_os_id;
u64 hv_hypercall;
+ atomic_t reader_counter;
+
#ifdef CONFIG_KVM_MMU_AUDIT
int audit_point;
#endif