Dump information about viridian enlightenments

Sometimes, for diagnosis, it's useful to have a log of what viridian
enlightenments are visiable to a VM. This patch adds new code into the
XEN system module to dump relevant information at boot time.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>

diff --git a/src/xen/hypercall.c b/src/xen/hypercall.c
index 5f14caaf6f9526dba88a54baeb5061e86d69434e..7003687381f8eb6f09bdb4f014675520ae30c70e 100644 (file)
--- a/src/xen/hypercall.c
+++ b/src/xen/hypercall.c
@@ -107,6 +107,10 @@ HypercallInitialize(
             goto fail1;
     }
 
+    LogPrintf(LOG_LEVEL_INFO,
+              "XEN: BASE CPUID LEAF @ %08x\n",
+              XenBaseLeaf);
+
     if ((ULONG_PTR)__Section & (PAGE_SIZE - 1))
         Hypercall = (PVOID)(((ULONG_PTR)__Section + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1));
     else

diff --git a/src/xen/system.c b/src/xen/system.c
index 1a788ce1970878a7fb5e17c04649404788cb4d1a..19340114864bcf02359373f64cba3e1f6deb43e0 100644 (file)
--- a/src/xen/system.c
+++ b/src/xen/system.c
@@ -329,6 +329,222 @@ SystemApicIDToProcessorID(
 
 #pragma warning(pop)
 
+static VOID
+SystemViridianInformation(
+    IN  ULONG   Count
+    )
+{
+    ULONG       EAX;
+    ULONG       EBX;
+    CHAR        Signature[5];
+    ULONG       Bit;
+
+    Info("====>\n");
+
+    if (Count < 1)
+        goto done;
+
+    RtlZeroMemory(Signature, sizeof (Signature));
+
+    __CpuId(0x40000001, &EAX, NULL, NULL, NULL);
+
+    *((PULONG)(Signature + 0)) = EAX;
+
+    Info("Interface Identifier: %s\n", Signature);
+
+    if (strcmp(Signature, "Hv#1") != 0)
+        goto done;
+
+    if (Count < 3)
+        goto done;
+
+    __CpuId(0x40000003, &EAX, NULL, NULL, NULL);
+
+    Info("Hypervisor Features:\n");
+
+    for (Bit = 0; Bit < sizeof (ULONG) * 8; Bit++) {
+        if (EAX == 0)
+            break;
+
+        if (EAX & 1) {
+            switch (Bit) {
+            case 0:
+                Info(" - VP Runtime\n");
+                break;
+
+            case 1:
+                Info(" - Partition Reference Counter\n");
+                break;
+
+            case 2:
+                Info(" - Basic SynIC MSRs\n");
+                break;
+
+            case 3:
+                Info(" - Synthetic Timer MSRs\n");
+                break;
+
+            case 4:
+                Info(" - APIC Access MSRs\n");
+                break;
+
+            case 5:
+                Info(" - Hypercall MSRs\n");
+                break;
+
+            case 6:
+                Info(" - Virtual Processor Index MSR\n");
+                break;
+
+            case 7:
+                Info(" - Virtual System Reset MSR\n");
+                break;
+
+            case 8:
+                Info(" - Statistics Pages MSRs\n");
+                break;
+
+            case 9:
+                Info(" - Partition Reference TSC MSR\n");
+                break;
+
+            case 10:
+                Info(" - Guest Idle State MSR\n");
+                break;
+
+            case 11:
+                Info(" - Timer Frequency MSR\n");
+                break;
+
+            case 12:
+                Info(" - Debug MSRs\n");
+                break;
+
+            default:
+                break;
+            }
+        }
+
+        EAX >>= 1;
+    }
+
+    if (Count < 4)
+        goto done;
+
+    __CpuId(0x40000004, &EAX, &EBX, NULL, NULL);
+
+    Info("Recommendations:\n");
+
+    for (Bit = 0; Bit < sizeof (ULONG) * 8; Bit++) {
+        if (EAX == 0)
+            break;
+
+        if (EAX & 1) {
+            switch (Bit) {
+            case 0:
+                Info(" - Address space switch via hypercall\n");
+                break;
+
+            case 1:
+                Info(" - Local TLB flush via hypercall\n");
+                break;
+
+            case 2:
+                Info(" - Remote TLB flush via hypercall\n");
+                break;
+
+            case 3:
+                Info(" - EOI, ICR and TPR access via MSR\n");
+                break;
+
+            case 4:
+                Info(" - Reset via MSR\n");
+                break;
+
+            case 5:
+                Info(" - Use relaxed timing\n");
+                break;
+
+            case 6:
+                Info(" - Use DMA remapping\n");
+                break;
+
+            case 7:
+                Info(" - Use interrupt remapping\n");
+                break;
+
+            case 8:
+                Info(" - Use x2APIC MSRs\n");
+                break;
+
+            case 9:
+                Info(" - Deprecate AutoEOI\n");
+                break;
+
+            default:
+                break;
+            }
+        }
+
+        EAX >>= 1;
+    }
+
+    if (EBX != 0xFFFFFFFF)
+        Info(" - Retry spinlocks %u times\n", EBX);
+
+    if (Count < 6)
+        goto done;
+
+    __CpuId(0x40000006, &EAX, NULL, NULL, NULL);
+
+    Info("Hardware Features:\n");
+
+    for (Bit = 0; Bit < sizeof (ULONG) * 8; Bit++) {
+        if (EAX == 0)
+            break;
+
+        if (EAX & 1) {
+            switch (Bit) {
+            case 0:
+                Info(" - APIC overlay assist\n");
+                break;
+
+            case 1:
+                Info(" - MSR bitmaps\n");
+                break;
+
+            case 2:
+                Info(" - Architectural performance counters\n");
+                break;
+
+            case 3:
+                Info(" - Second Level Address Translation (SLAT)\n");
+                break;
+
+            case 4:
+                Info(" - DMA remapping\n");
+                break;
+
+            case 5:
+                Info(" - Interrupt remapping\n");
+                break;
+
+            case 6:
+                Info(" - Memory Patrol Scrubber\n");
+                break;
+
+            default:
+                break;
+            }
+        }
+
+        EAX >>= 1;
+    }
+
+done:
+    Info("<====\n");
+}
+
 static
 _Function_class_(KDEFERRED_ROUTINE)
 _IRQL_requires_max_(DISPATCH_LEVEL)
@@ -348,6 +564,7 @@ SystemProcessorInformation(
     ULONG               Index;
     PROCESSOR_NUMBER    ProcNumber;
     PSYSTEM_PROCESSOR   Processor;
+    ULONG               EAX;
     ULONG               EBX;
     ULONG               ECX;
     ULONG               EDX;
@@ -361,6 +578,20 @@ SystemProcessorInformation(
 
     Processor = &Context->Processor[Index];
 
+    if (Index == 0) {
+        CHAR    Signature[13];
+
+        RtlZeroMemory(Signature, sizeof (Signature));
+
+        __CpuId(0x40000000, &EAX, &EBX, &ECX, &EDX);
+        *((PULONG)(Signature + 0)) = EBX;
+        *((PULONG)(Signature + 4)) = ECX;
+        *((PULONG)(Signature + 8)) = EDX;
+
+        if (strcmp(Signature, "Microsoft Hv") == 0)
+            SystemViridianInformation(EAX - 0x40000000);
+    }
+
     Info("====> (%u:%u)\n", ProcNumber.Group, ProcNumber.Number);
 
     __CpuId(0, NULL, &EBX, &ECX, &EDX);