diff options
| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-07-12 03:32:13 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-07-24 11:50:38 +0300 |
| commit | c2a2ac2b563ccc3a69540965b5a994c19e3817d7 (patch) | |
| tree | 83e3c35da3b9e696f77d08d6ab757bae606dd975 /arch/x86/include | |
| parent | 603e0651cfc8562b103454d7ded71f3ad1eb3a37 (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')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 8 |
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 |