[Xen-changelog] [xen-unstable] x86/hvm/vmx: Trace traps and realmode exits

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User George Dunlap <george.dunlap@xxxxxxxxxxxxx>
# Date 1322665584 28800
# Node ID 31f751ef3e009f20b1515416ebffa6e19221a56b
# Parent  77421dbd48711e625dfc835df5e0fa7a3e09b634
x86/hvm/vmx: Trace traps and realmode exits

Add some more tracing to vmexits that don't currently have
trace information:
 * VMX realmode emulation
 * Various VMX traps
 * Fast-pathed APIC accesses

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Committed-by: Keir Fraser <keir@xxxxxxx>
---


diff -r 77421dbd4871 -r 31f751ef3e00 xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c        Wed Nov 30 06:57:20 2011 -0800
+++ b/xen/arch/x86/hvm/vmx/vmx.c        Wed Nov 30 07:06:24 2011 -0800
@@ -2217,6 +2217,7 @@
     {
         update_guest_eip(); /* Safe: APIC data write */
         vlapic_EOI_set(vcpu_vlapic(current));
+        HVMTRACE_0D(VLAPIC);
         return 1;
     }
 
@@ -2324,6 +2325,7 @@
             {
                 perfc_incr(realmode_exits);
                 v->arch.hvm_vmx.vmx_emulate = 1;
+                HVMTRACE_0D(REALMODE_EMULATE);
                 return;
             }
         case EXIT_REASON_EXTERNAL_INTERRUPT:
@@ -2343,6 +2345,7 @@
         default:
             v->arch.hvm_vmx.vmx_emulate = 1;
             perfc_incr(realmode_exits);
+            HVMTRACE_0D(REALMODE_EMULATE);
             return;
         }
     }
@@ -2386,6 +2389,7 @@
              * Table 23-1, "Exit Qualification for Debug Exceptions").
              */
             exit_qualification = __vmread(EXIT_QUALIFICATION);
+            HVMTRACE_1D(TRAP_DEBUG, exit_qualification);
             write_debugreg(6, exit_qualification | 0xffff0ff0);
             if ( !v->domain->debugger_attached || cpu_has_monitor_trap_flag )
                 goto exit_and_crash;
@@ -2393,6 +2397,7 @@
             break;
         case TRAP_int3: 
         {
+            HVMTRACE_1D(TRAP, vector);
             if ( v->domain->debugger_attached )
             {
                 update_guest_eip(); /* Safe: INT3 */            
@@ -2415,6 +2420,7 @@
             goto exit_and_crash;
         }
         case TRAP_no_device:
+            HVMTRACE_1D(TRAP, vector);
             vmx_fpu_dirty_intercept();
             break;
         case TRAP_page_fault:
@@ -2455,9 +2461,11 @@
             /* Already handled above. */
             break;
         case TRAP_invalid_op:
+            HVMTRACE_1D(TRAP, vector);
             vmx_vmexit_ud_intercept(regs);
             break;
         default:
+            HVMTRACE_1D(TRAP, vector);
             goto exit_and_crash;
         }
         break;
diff -r 77421dbd4871 -r 31f751ef3e00 xen/include/asm-x86/hvm/trace.h
--- a/xen/include/asm-x86/hvm/trace.h   Wed Nov 30 06:57:20 2011 -0800
+++ b/xen/include/asm-x86/hvm/trace.h   Wed Nov 30 07:06:24 2011 -0800
@@ -50,6 +50,10 @@
 #define DO_TRC_HVM_CLTS        DEFAULT_HVM_MISC
 #define DO_TRC_HVM_LMSW        DEFAULT_HVM_MISC
 #define DO_TRC_HVM_LMSW64      DEFAULT_HVM_MISC
+#define DO_TRC_HVM_REALMODE_EMULATE DEFAULT_HVM_MISC 
+#define DO_TRC_HVM_TRAP             DEFAULT_HVM_MISC
+#define DO_TRC_HVM_TRAP_DEBUG       DEFAULT_HVM_MISC
+#define DO_TRC_HVM_VLAPIC           DEFAULT_HVM_MISC
 
 
 #ifdef __x86_64__
diff -r 77421dbd4871 -r 31f751ef3e00 xen/include/public/trace.h
--- a/xen/include/public/trace.h        Wed Nov 30 06:57:20 2011 -0800
+++ b/xen/include/public/trace.h        Wed Nov 30 07:06:24 2011 -0800
@@ -164,6 +164,10 @@
 #define TRC_HVM_RDTSC           (TRC_HVM_HANDLER + 0x1a)
 #define TRC_HVM_INTR_WINDOW     (TRC_HVM_HANDLER + 0x20)
 #define TRC_HVM_NPF             (TRC_HVM_HANDLER + 0x21)
+#define TRC_HVM_REALMODE_EMULATE (TRC_HVM_HANDLER + 0x22)
+#define TRC_HVM_TRAP             (TRC_HVM_HANDLER + 0x23)
+#define TRC_HVM_TRAP_DEBUG       (TRC_HVM_HANDLER + 0x24)
+#define TRC_HVM_VLAPIC           (TRC_HVM_HANDLER + 0x25)
 
 #define TRC_HVM_IOPORT_WRITE    (TRC_HVM_HANDLER + 0x216)
 #define TRC_HVM_IOMEM_WRITE     (TRC_HVM_HANDLER + 0x217)

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog