Mailing List Archive

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@eu.citrix.com>

diff -r 96bbdc894224 -r 68ac72db10a3 xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c Fri Nov 25 15:48:03 2011 +0000
+++ b/xen/arch/x86/hvm/vmx/vmx.c Fri Nov 25 17:12:41 2011 +0000
@@ -2217,6 +2217,7 @@ static int vmx_handle_eoi_write(void)
{
update_guest_eip(); /* Safe: APIC data write */
vlapic_EOI_set(vcpu_vlapic(current));
+ HVMTRACE_0D(VLAPIC);
return 1;
}

@@ -2324,6 +2325,7 @@ asmlinkage void vmx_vmexit_handler(struc
{
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 @@ asmlinkage void vmx_vmexit_handler(struc
default:
v->arch.hvm_vmx.vmx_emulate = 1;
perfc_incr(realmode_exits);
+ HVMTRACE_0D(REALMODE_EMULATE);
return;
}
}
@@ -2386,6 +2389,7 @@ asmlinkage void vmx_vmexit_handler(struc
* 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 @@ asmlinkage void vmx_vmexit_handler(struc
break;
case TRAP_int3:
{
+ HVMTRACE_1D(TRAP, vector);
if ( v->domain->debugger_attached )
{
update_guest_eip(); /* Safe: INT3 */
@@ -2415,6 +2420,7 @@ asmlinkage void vmx_vmexit_handler(struc
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 @@ asmlinkage void vmx_vmexit_handler(struc
/* 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 96bbdc894224 -r 68ac72db10a3 xen/include/asm-x86/hvm/trace.h
--- a/xen/include/asm-x86/hvm/trace.h Fri Nov 25 15:48:03 2011 +0000
+++ b/xen/include/asm-x86/hvm/trace.h Fri Nov 25 17:12:41 2011 +0000
@@ -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 96bbdc894224 -r 68ac72db10a3 xen/include/public/trace.h
--- a/xen/include/public/trace.h Fri Nov 25 15:48:03 2011 +0000
+++ b/xen/include/public/trace.h Fri Nov 25 17:12:41 2011 +0000
@@ -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)

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