提交 83c3a331 编写于 作者: X Xudong Hao 提交者: Avi Kivity

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: NHaitao Shan <haitao.shan@intel.com>
Signed-off-by: NXudong Hao <xudong.hao@intel.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
上级 aaf07bc2
......@@ -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;
......
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