kexec for 2.5.42

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diff -uNrX linux-ignore-files linux-2.5.42.eb1/arch/i386/kernel/dmi_scan.c linux-2.5.42.kexec.x86/arch/i386/kernel/dmi_scan.c
@@ -204,31 +204,6 @@
 	return 0;
 }
 
-/*
- * Some machines require the "reboot=s"  commandline option, this quirk makes that automatic.
- */
-static __init int set_smp_reboot(struct dmi_blacklist *d)
-{
-#ifdef CONFIG_SMP
-	extern int reboot_smp;
-	if (reboot_smp == 0)
-	{
-		reboot_smp = 1;
-		printk(KERN_INFO "%s series board detected. Selecting SMP-method for reboots.\n", d->ident);
-	}
-#endif
-	return 0;
-}
-
-/*
- * Some machines require the "reboot=b,s"  commandline option, this quirk makes that automatic.
- */
-static __init int set_smp_bios_reboot(struct dmi_blacklist *d)
-{
-	set_smp_reboot(d);
-	set_bios_reboot(d);
-	return 0;
-}
 
 /*
  * Some bioses have a broken protected mode poweroff and need to use realmode

@@ -519,7 +494,7 @@
 			MATCH(DMI_BIOS_VERSION, "4.60 PGMA"),
 			MATCH(DMI_BIOS_DATE, "134526184"), NO_MATCH
 			} },
-	{ set_smp_bios_reboot, "Dell PowerEdge 1300", {	/* Handle problems with rebooting on Dell 1300's */
+	{ set_bios_reboot, "Dell PowerEdge 1300", {	/* Handle problems with rebooting on Dell 1300's */
 			MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
 			MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"),
 			NO_MATCH, NO_MATCH

diff -uNrX linux-ignore-files linux-2.5.42.eb1/arch/i386/kernel/io_apic.c linux-2.5.42.kexec.x86/arch/i386/kernel/io_apic.c
@@ -1112,8 +1112,6 @@
 	 * Clear the IO-APIC before rebooting:
 	 */
 	clear_IO_APIC();
-
-	disconnect_bsp_APIC();
 }
 
 /*

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diff -uNrX linux-ignore-files linux-2.5.42.eb1/arch/i386/kernel/reboot.c linux-2.5.42.kexec.x86/arch/i386/kernel/reboot.c
@@ -19,8 +19,7 @@
 int reboot_thru_bios;
 
 #ifdef CONFIG_SMP
-int reboot_smp = 0;
-static int reboot_cpu = -1;
+int reboot_cpu = -1;	  /* specifies the internal linux cpu id, not the apicid */
 /* shamelessly grabbed from lib/vsprintf.c for readability */
 #define is_digit(c)	((c) >= '0' && (c) <= '9')
 #endif

@@ -42,7 +41,6 @@
 			break;
 #ifdef CONFIG_SMP
 		case 's': /* "smp" reboot by executing reset on BSP or other CPU*/
-			reboot_smp = 1;
 			if (is_digit(*(str+1))) {
 				reboot_cpu = (int) (*(str+1) - '0');
 				if (is_digit(*(str+2))) 

@@ -224,34 +222,6 @@
 void machine_restart(char * __unused)
 {
 #if CONFIG_SMP
-	int cpuid;
-	
-	cpuid = GET_APIC_ID(apic_read(APIC_ID));
-
-	if (reboot_smp) {
-
-		/* check to see if reboot_cpu is valid 
-		   if its not, default to the BSP */
-		if ((reboot_cpu == -1) ||  
-		      (reboot_cpu > (NR_CPUS -1))  || 
-		      !(phys_cpu_present_map & (1<<cpuid))) 
-			reboot_cpu = boot_cpu_physical_apicid;
-
-		reboot_smp = 0;  /* use this as a flag to only go through this once*/
-		/* re-run this function on the other CPUs
-		   it will fall though this section since we have 
-		   cleared reboot_smp, and do the reboot if it is the
-		   correct CPU, otherwise it halts. */
-		if (reboot_cpu != cpuid)
-			smp_call_function((void *)machine_restart , NULL, 1, 0);
-	}
-
-	/* if reboot_cpu is still -1, then we want a tradional reboot, 
-	   and if we are not running on the reboot_cpu,, halt */
-	if ((reboot_cpu != -1) && (cpuid != reboot_cpu)) {
-		for (;;)
-		__asm__ __volatile__ ("hlt");
-	}
 	/*
 	 * Stop all CPUs and turn off local APICs and the IO-APIC, so
 	 * other OSs see a clean IRQ state.

diff -uNrX linux-ignore-files linux-2.5.42.eb1/arch/i386/kernel/smp.c linux-2.5.42.kexec.x86/arch/i386/kernel/smp.c
@@ -611,6 +611,30 @@
 
 void smp_send_stop(void)
 {
+	extern int reboot_cpu;
+	int reboot_cpu_id;
+
+ 	/* The boot cpu is always logical cpu 0 */
+	reboot_cpu_id = 0;
+
+	/* See if there has been give a command line override .
+	 */
+	if ((reboot_cpu != -1) && !(reboot_cpu >= NR_CPUS) && 
+		test_bit(reboot_cpu, &cpu_online_map)) {
+		reboot_cpu_id = reboot_cpu;
+	}
+	 
+	/* Make certain the the cpu I'm rebooting on is online */
+	if (!test_bit(reboot_cpu_id, &cpu_online_map)) {
+		reboot_cpu_id = smp_processor_id();
+	}
+
+	/* Make certain I only run on the appropriate processor */
+	set_cpus_allowed(current, 1 << reboot_cpu_id);
+
+	/* O.k. Now that I'm on the appropriate processor stop
+	 * all of the others.
+	 */
 	smp_call_function(stop_this_cpu, NULL, 1, 0);
 
 	local_irq_disable();

diff -uNrX linux-ignore-files linux-2.5.42.eb1/include/asm-i386/apicdef.h linux-2.5.42.kexec.x86/include/asm-i386/apicdef.h
@@ -86,6 +86,7 @@
 #define			APIC_LVT_REMOTE_IRR		(1<<14)
 #define			APIC_INPUT_POLARITY		(1<<13)
 #define			APIC_SEND_PENDING		(1<<12)
+#define			APIC_MODE_MASK			0x700
 #define			GET_APIC_DELIVERY_MODE(x)	(((x)>>8)&0x7)
 #define			SET_APIC_DELIVERY_MODE(x,y)	(((x)&~0x700)|((y)<<8))
 #define				APIC_MODE_FIXED		0x0

diff -uNrX linux-ignore-files linux-2.5.42.eb1/include/asm-i386/kexec.h linux-2.5.42.kexec.x86/include/asm-i386/kexec.h
@@ -0,0 +1,25 @@
+#ifndef _I386_KEXEC_H
+#define _I386_KEXEC_H
+
+#include <asm/fixmap.h>
+
+/*
+ * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
+ * I.e. Maximum page that is mapped directly into kernel memory,
+ * and kmap is not required.
+ *
+ * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct
+ * calculation for the amount of memory directly mappable into the
+ * kernel memory space.
+ */
+
+/* Maximum physical address we can use pages from */
+#define KEXEC_SOURCE_MEMORY_LIMIT (FIXADDR_START - PAGE_OFFSET) 
+/* Maximum address we can reach in physical address mode */
+#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
+
+#define KEXEC_REBOOT_CODE_SIZE	4096
+#define KEXEC_REBOOT_CODE_ALIGN 0
+
+
+#endif /* _I386_KEXEC_H */

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