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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [win-pv-devel] [PATCH] 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@xxxxxxxxxx>
---
src/xen/hypercall.c | 4 +
src/xen/system.c | 231 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 235 insertions(+)
diff --git a/src/xen/hypercall.c b/src/xen/hypercall.c
index 5f14caa..7003687 100644
--- 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 1a788ce..1934011 100644
--- 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);
--
2.1.1
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