KVM: MMU: remove bypass_guest_pf
The idea is from Avi:
| Maybe it's time to kill off bypass_guest_pf=1. It's not as effective as
| it used to be, since unsync pages always use shadow_trap_nonpresent_pte,
| and since we convert between the two nonpresent_ptes during sync and unsync.
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index f5b49c7..a644acb 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -49,9 +49,6 @@
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");
-static int __read_mostly bypass_guest_pf = 1;
-module_param(bypass_guest_pf, bool, S_IRUGO);
-
static int __read_mostly enable_vpid = 1;
module_param_named(vpid, enable_vpid, bool, 0444);
@@ -3632,8 +3629,8 @@
vmcs_write32(PLE_WINDOW, ple_window);
}
- vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
- vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
+ vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0);
+ vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, 0);
vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */
@@ -7103,16 +7100,12 @@
vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
if (enable_ept) {
- bypass_guest_pf = 0;
kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
VMX_EPT_EXECUTABLE_MASK);
kvm_enable_tdp();
} else
kvm_disable_tdp();
- if (bypass_guest_pf)
- kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
-
return 0;
out3: