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| author | Xudong Hao | 2012-05-28 13:33:35 +0200 |
|---|---|---|
| committer | Avi Kivity | 2012-06-05 15:31:03 +0200 |
| commit | 83c3a3312235220476d3c207f67bd17be6e17ff9 (patch) | |
| tree | 4aec1de6ac8419a276a46a8365b50436cc66a8fc /arch/x86/kvm/vmx.c | |
| parent | KVM: VMX: Add EPT A/D bits definitions (diff) | |
| download | kernel-qcow2-linux-83c3a3312235220476d3c207f67bd17be6e17ff9.tar.gz kernel-qcow2-linux-83c3a3312235220476d3c207f67bd17be6e17ff9.tar.xz kernel-qcow2-linux-83c3a3312235220476d3c207f67bd17be6e17ff9.zip | |
KVM: VMX: Add parameter to control A/D bits support, default is on
Add kernel parameter to control A/D bits support, it's on by default.
Signed-off-by: Haitao Shan <haitao.shan@intel.com>
Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 32eb58866292..18590e003bd2 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -71,6 +71,9 @@ static bool __read_mostly enable_unrestricted_guest = 1; module_param_named(unrestricted_guest, enable_unrestricted_guest, bool, S_IRUGO); +static bool __read_mostly enable_ept_ad_bits = 1; +module_param_named(eptad, enable_ept_ad_bits, bool, S_IRUGO); + static bool __read_mostly emulate_invalid_guest_state = 0; module_param(emulate_invalid_guest_state, bool, S_IRUGO); @@ -789,6 +792,11 @@ static inline bool cpu_has_vmx_ept_4levels(void) return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; } +static inline bool cpu_has_vmx_ept_ad_bits(void) +{ + return vmx_capability.ept & VMX_EPT_AD_BIT; +} + static inline bool cpu_has_vmx_invept_individual_addr(void) { return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT; @@ -2645,8 +2653,12 @@ static __init int hardware_setup(void) !cpu_has_vmx_ept_4levels()) { enable_ept = 0; enable_unrestricted_guest = 0; + enable_ept_ad_bits = 0; } + if (!cpu_has_vmx_ept_ad_bits()) + enable_ept_ad_bits = 0; + if (!cpu_has_vmx_unrestricted_guest()) enable_unrestricted_guest = 0; |