KVM: MMU: remove oos_shadow parameter

The unsync code should be stable now, maybe it is the time to remove this
parameter to cleanup the code a little bit

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 81c287fad79d6370d0d697d5ddf33b8af756a036..6e7cce096e6bce7a2aaa998ed73ec1a2eda46d16 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1178,9 +1178,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs.
                        Default is 0 (don't ignore, but inject #GP)
 
-       kvm.oos_shadow= [KVM] Disable out-of-sync shadow paging.
-                       Default is 1 (enabled)
-
        kvm.mmu_audit=  [KVM] This is a R/W parameter which allows audit
                        KVM MMU at runtime.
                        Default is 0 (off)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 262a3af1f0ec8bfa084c7a7a4b63d7a77536ec9b..b1178d1bb8f5ae533d05cb8f7df1c1a621926516 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -93,9 +93,6 @@ static int dbg = 0;
 module_param(dbg, bool, 0644);
 #endif
 
-static int oos_shadow = 1;
-module_param(oos_shadow, bool, 0644);
-
 #ifndef MMU_DEBUG
 #define ASSERT(x) do { } while (0)
 #else
@@ -2196,8 +2193,6 @@ static int mmu_need_write_protect(struct kvm_vcpu *vcpu, gfn_t gfn,
                        return 1;
 
                if (!need_unsync && !s->unsync) {
-                       if (!oos_shadow)
-                               return 1;
                        need_unsync = true;
                }
        }