Make MCE panic message more direct

diff -r 68f40abeb9fe xen/arch/x86/cpu/mcheck/amd_k8.c
@@ -219,7 +219,7 @@ void k8_machine_check(struct cpu_user_re
 			show_execution_state(regs);
 		}
 		x86_mcinfo_dump(mc_data);
-		panic("End of MCE. Use mcelog to decode above error codes.\n");
+		mc_panic("End of MCE. Use mcelog to decode above error codes.\n");
 	}
 
 	/* If Dom0 registered a machine check handler, which is only possible

@@ -248,7 +248,7 @@ void k8_machine_check(struct cpu_user_re
 			/* Dom0 is impacted. Since noone can't handle
 			 * this error, panic! */
 			x86_mcinfo_dump(mc_data);
-			panic("MCE occured in Dom0, which it can't handle\n");
+			mc_panic("MCE occured in Dom0, which it can't handle\n");
 
 			/* UNREACHED */
 		} else {

diff -r 68f40abeb9fe xen/arch/x86/cpu/mcheck/k7.c
@@ -57,9 +57,9 @@ static fastcall void k7_machine_check(st
 	}
 
 	if (recover&2)
-		panic ("CPU context corrupt");
+		mc_panic ("CPU context corrupt");
 	if (recover&1)
-		panic ("Unable to continue");
+		mc_panic ("Unable to continue");
 	printk (KERN_EMERG "Attempting to continue.\n");
 	mcgstl &= ~(1<<2);
 	wrmsr (MSR_IA32_MCG_STATUS,mcgstl, mcgsth);

diff -r 68f40abeb9fe xen/arch/x86/cpu/mcheck/mce.c
@@ -9,6 +9,7 @@
 #include <xen/config.h>
 #include <xen/smp.h>
 #include <xen/errno.h>
+#include <xen/console.h>
 
 #include <asm/processor.h> 
 #include <asm/system.h>

@@ -574,3 +575,15 @@ long do_mca(XEN_GUEST_HANDLE(xen_mc_t) u
 
 	return ret;
 }
+
+void mc_panic(char *s)
+{
+    console_start_sync();
+    printk("Fatal machine check: %s\n", s);
+    printk("\n"
+           "****************************************\n"
+           "\n"
+           "   The processor has reported a hardware error which cannot\n"
+           "   be recovered from.  Xen will now reboot the machine.\n");
+    panic("HARDWARE ERROR");
+}

diff -r 68f40abeb9fe xen/arch/x86/cpu/mcheck/mce.h
@@ -24,6 +24,7 @@ void x86_mcinfo_clear(struct mc_info *mi
 void x86_mcinfo_clear(struct mc_info *mi);
 int x86_mcinfo_add(struct mc_info *mi, void *mcinfo);
 void x86_mcinfo_dump(struct mc_info *mi);
+void mc_panic(char *s);
 
 /* Global variables */
 extern int mce_disabled;

diff -r 68f40abeb9fe xen/arch/x86/cpu/mcheck/p4.c
@@ -204,9 +204,9 @@ static fastcall void intel_machine_check
 	}
 
 	if (recover & 2)
-		panic ("CPU context corrupt");
+		mc_panic ("CPU context corrupt");
 	if (recover & 1)
-		panic ("Unable to continue");
+		mc_panic ("Unable to continue");
 
 	printk(KERN_EMERG "Attempting to continue.\n");
 	/* 

diff -r 68f40abeb9fe xen/arch/x86/cpu/mcheck/p6.c
@@ -51,9 +51,9 @@ static fastcall void intel_machine_check
 	}
 
 	if (recover & 2)
-		panic ("CPU context corrupt");
+		mc_panic ("CPU context corrupt");
 	if (recover & 1)
-		panic ("Unable to continue");
+		mc_panic ("Unable to continue");
 
 	printk (KERN_EMERG "Attempting to continue.\n");
 	/*