KVM: VMX: Enable Virtual Processor Identification (VPID)

To allow TLB entries to be retained across VM entry and VM exit, the VMM
can now identify distinct address spaces through a new virtual-processor ID
(VPID) field of the VMCS.

[avi: drop vpid_sync_all()]
[avi: add "cc" to asm constraints]

Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86/kvm/vmx.h b/arch/x86/kvm/vmx.h
index d52ae8d7303d..436ce0f29092 100644
--- a/arch/x86/kvm/vmx.h
+++ b/arch/x86/kvm/vmx.h
@@ -49,6 +49,7 @@
  * Definitions of Secondary Processor-Based VM-Execution Controls.
  */
 #define SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES 0x00000001
+#define SECONDARY_EXEC_ENABLE_VPID              0x00000020
 #define SECONDARY_EXEC_WBINVD_EXITING           0x00000040
 
 
@@ -65,6 +66,7 @@
 
 /* VMCS Encodings */
 enum vmcs_field {
+        VIRTUAL_PROCESSOR_ID            = 0x00000000,
         GUEST_ES_SELECTOR               = 0x00000800,
         GUEST_CS_SELECTOR               = 0x00000802,
         GUEST_SS_SELECTOR               = 0x00000804,
@@ -321,4 +323,8 @@ enum vmcs_field {
 
 #define APIC_ACCESS_PAGE_PRIVATE_MEMSLOT        9
 
+#define VMX_NR_VPIDS                            (1 << 16)
+#define VMX_VPID_EXTENT_SINGLE_CONTEXT          1
+#define VMX_VPID_EXTENT_ALL_CONTEXT             2
+
 #endif