x86/vPMU: provide comments for which Intel model is what

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Tim Deegan <tim@xen.org>

1 files changed, 10 insertions, 10 deletions

diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index 2cef2d6b0d..4d33231dfc 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -738,16 +738,16 @@ int vmx_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
     {
         switch ( cpu_model )
         {
-        case 15:
-        case 23:
-        case 26:
-        case 29:
-        case 42:
-        case 45:
-        case 46:
-        case 47:
-        case 58:
-        case 62:
+        case 15: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
+        case 23: /* 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
+        case 26: /* 45 nm nehalem, "Bloomfield" */
+        case 29: /* six-core 45 nm xeon "Dunnington" */
+        case 42: /* SandyBridge */
+        case 45: /* SandyBridge, "Romley-EP" */
+        case 46: /* 45 nm nehalem-ex, "Beckton" */
+        case 47: /* 32 nm Xeon E7 */
+        case 58: /* IvyBridge */
+        case 62: /* IvyBridge EP */
             ret = core2_vpmu_initialise(v, vpmu_flags);
             if ( !ret )
                 vpmu->arch_vpmu_ops = &core2_vpmu_ops;