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KVM: VMX: Make sure single type invvpid is supported before issuing invvpid instruction

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According to SDM, we need check whether single-context INVVPID type is supported
before issuing invvpid instruction.

Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Reviewed-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Gui Jianfeng 2010-06-04 08:51:39 +08:00 committed by Avi Kivity
parent 7bee342a9e
commit 518c8aee5c
2 changed files with 9 additions and 1 deletions
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2
arch/x86/include/asm/vmx.h
View File

@ -376,6 +376,8 @@ enum vmcs_field {
#define VMX_EPT_EXTENT_CONTEXT_BIT (1ull << 25)
#define VMX_EPT_EXTENT_GLOBAL_BIT (1ull << 26)
#define VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT (1ull << 9) /* (41 - 32) */
#define VMX_EPT_DEFAULT_GAW 3
#define VMX_EPT_MAX_GAW 0x4
#define VMX_EPT_MT_EPTE_SHIFT 3

8
arch/x86/kvm/vmx.c
View File

@ -360,6 +360,11 @@ static inline bool cpu_has_vmx_invept_global(void)
return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT;
}
static inline bool cpu_has_vmx_invvpid_single(void)
{
return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT;
}
static inline bool cpu_has_vmx_ept(void)
{
return vmcs_config.cpu_based_2nd_exec_ctrl &
@ -504,7 +509,8 @@ static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx)
if (vmx->vpid == 0)
return;
__invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
if (cpu_has_vmx_invvpid_single())
__invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
}
static inline void ept_sync_global(void)