vmx: add PML definition and feature detection

The patch adds PML definition and feature detection. Note PML won't be detected
if PML is disabled from boot parameter. PML is also disabled in construct_vmcs,
as it will only be enabled when domain is switched to log dirty mode.

Signed-off-by: Kai Huang <kai.huang@linux.intel.com>
Acked-by: Tim Deegan <tim@xen.org>
Acked-by: Kevin Tian <kevin.tian@intel.com>

diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index 0a9a1aafbb14dc478577a5aab89f907571bc8b7c..f993a498007d000001a15b2570afb8816e8bde30 100644 (file)
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -140,6 +140,7 @@ static void __init vmx_display_features(void)
     P(cpu_has_vmx_virtual_intr_delivery, "Virtual Interrupt Delivery");
     P(cpu_has_vmx_posted_intr_processing, "Posted Interrupt Processing");
     P(cpu_has_vmx_vmcs_shadowing, "VMCS shadowing");
+    P(cpu_has_vmx_pml, "Page Modification Logging");
 #undef P
 
     if ( !printed )
@@ -237,6 +238,8 @@ static int vmx_init_vmcs_config(void)
             opt |= SECONDARY_EXEC_ENABLE_VPID;
         if ( opt_unrestricted_guest_enabled )
             opt |= SECONDARY_EXEC_UNRESTRICTED_GUEST;
+        if ( opt_pml_enabled )
+            opt |= SECONDARY_EXEC_ENABLE_PML;
 
         /*
          * "APIC Register Virtualization" and "Virtual Interrupt Delivery"
@@ -283,6 +286,10 @@ static int vmx_init_vmcs_config(void)
          */
         if ( !(_vmx_ept_vpid_cap & VMX_VPID_INVVPID_ALL_CONTEXT) )
             _vmx_secondary_exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
+
+        /* EPT A/D bits is required for PML */
+        if ( !(_vmx_ept_vpid_cap & VMX_EPT_AD_BIT) )
+            _vmx_secondary_exec_control &= ~SECONDARY_EXEC_ENABLE_PML;
     }
 
     if ( _vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT )
@@ -303,6 +310,14 @@ static int vmx_init_vmcs_config(void)
                   SECONDARY_EXEC_UNRESTRICTED_GUEST);
     }
 
+    /* PML cannot be supported if EPT is not used */
+    if ( !(_vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT) )
+        _vmx_secondary_exec_control &= ~SECONDARY_EXEC_ENABLE_PML;
+
+    /* Turn off opt_pml_enabled if PML feature is not present */
+    if ( !(_vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_PML) )
+        opt_pml_enabled = 0;
+
     if ( (_vmx_secondary_exec_control & SECONDARY_EXEC_PAUSE_LOOP_EXITING) &&
           ple_gap == 0 )
     {
@@ -1039,6 +1054,9 @@ static int construct_vmcs(struct vcpu *v)
         __vmwrite(POSTED_INTR_NOTIFICATION_VECTOR, posted_intr_vector);
     }
 
+    /* Disable PML anyway here as it will only be enabled in log dirty mode */
+    v->arch.hvm_vmx.secondary_exec_control &= ~SECONDARY_EXEC_ENABLE_PML;
+
     /* Host data selectors. */
     __vmwrite(HOST_SS_SELECTOR, __HYPERVISOR_DS);
     __vmwrite(HOST_DS_SELECTOR, __HYPERVISOR_DS);

diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h b/xen/include/asm-x86/hvm/vmx/vmcs.h
index 6fce6aa928f2e81efa9f01164b123e8d36743e5e..f831a78c475780d01cf1f2bc17486a74ce771cdf 100644 (file)
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -215,6 +215,7 @@ extern u32 vmx_vmentry_control;
 #define SECONDARY_EXEC_ENABLE_INVPCID           0x00001000
 #define SECONDARY_EXEC_ENABLE_VMFUNC            0x00002000
 #define SECONDARY_EXEC_ENABLE_VMCS_SHADOWING    0x00004000
+#define SECONDARY_EXEC_ENABLE_PML               0x00020000
 extern u32 vmx_secondary_exec_control;
 
 #define VMX_EPT_EXEC_ONLY_SUPPORTED             0x00000001
@@ -226,6 +227,7 @@ extern u32 vmx_secondary_exec_control;
 #define VMX_EPT_INVEPT_INSTRUCTION              0x00100000
 #define VMX_EPT_INVEPT_SINGLE_CONTEXT           0x02000000
 #define VMX_EPT_INVEPT_ALL_CONTEXT              0x04000000
+#define VMX_EPT_AD_BIT                          0x00200000
 
 #define VMX_MISC_VMWRITE_ALL                    0x20000000
 
@@ -274,6 +276,8 @@ extern u32 vmx_secondary_exec_control;
     (vmx_pin_based_exec_control & PIN_BASED_POSTED_INTERRUPT)
 #define cpu_has_vmx_vmcs_shadowing \
     (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VMCS_SHADOWING)
+#define cpu_has_vmx_pml \
+    (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_PML)
 
 #define VMCS_RID_TYPE_MASK              0x80000000
 
@@ -318,6 +322,7 @@ enum vmcs_field {
     GUEST_LDTR_SELECTOR             = 0x0000080c,
     GUEST_TR_SELECTOR               = 0x0000080e,
     GUEST_INTR_STATUS               = 0x00000810,
+    GUEST_PML_INDEX                 = 0x00000812,
     HOST_ES_SELECTOR                = 0x00000c00,
     HOST_CS_SELECTOR                = 0x00000c02,
     HOST_SS_SELECTOR                = 0x00000c04,
@@ -331,6 +336,7 @@ enum vmcs_field {
     VM_EXIT_MSR_STORE_ADDR          = 0x00002006,
     VM_EXIT_MSR_LOAD_ADDR           = 0x00002008,
     VM_ENTRY_MSR_LOAD_ADDR          = 0x0000200a,
+    PML_ADDRESS                     = 0x0000200e,
     TSC_OFFSET                      = 0x00002010,
     VIRTUAL_APIC_PAGE_ADDR          = 0x00002012,
     APIC_ACCESS_ADDR                = 0x00002014,

diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h b/xen/include/asm-x86/hvm/vmx/vmx.h
index 91c5e18e54b77e000bd13f6944ebc9195eef011b..50f1bfc95fec4a4b6c90322a65e64e36f3e1b02c 100644 (file)
--- a/xen/include/asm-x86/hvm/vmx/vmx.h
+++ b/xen/include/asm-x86/hvm/vmx/vmx.h
@@ -185,6 +185,7 @@ static inline unsigned long pi_get_pir(struct pi_desc *pi_desc, int group)
 #define EXIT_REASON_XSETBV              55
 #define EXIT_REASON_APIC_WRITE          56
 #define EXIT_REASON_INVPCID             58
+#define EXIT_REASON_PML_FULL            62
 
 /*
  * Interruption-information format