Re: [PATCH] - Pass OS logical cpu number to the SN prom (bios)

Pass the OS logical cpu number to the PROM. This allows PROM
to log the OS logical cpu number in error records viewed thru POD.


	Signed-off-by: Jack Steiner <steiner@sgi.com>

---
Add change suggested by Keith...


Index: linux/arch/ia64/sn/kernel/setup.c
===================================================================
--- linux.orig/arch/ia64/sn/kernel/setup.c	2006-04-22 08:50:14.567000831 -0500
+++ linux/arch/ia64/sn/kernel/setup.c	2006-04-27 19:58:16.633858645 -0500
@@ -577,7 +577,8 @@ void __init sn_cpu_init(void)
 	int i;
 	static int wars_have_been_checked;
 
-	if (smp_processor_id() == 0 && IS_MEDUSA()) {
+	cpuid = smp_processor_id();
+	if (cpuid == 0 && IS_MEDUSA()) {
 		if (ia64_sn_is_fake_prom())
 			sn_prom_type = 2;
 		else
@@ -597,6 +598,12 @@ void __init sn_cpu_init(void)
 	sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2;
 
 	/*
+	 * Don't check status. The SAL call is not supported on all PROMs
+	 * but a failure is harmless.
+	 */
+	(void) ia64_sn_set_cpu_number(cpuid);
+
+	/*
 	 * The boot cpu makes this call again after platform initialization is
 	 * complete.
 	 */
@@ -607,7 +614,6 @@ void __init sn_cpu_init(void)
 		if (ia64_sn_get_prom_feature_set(i, &sn_prom_features[i]) != 0)
 			break;
 
-	cpuid = smp_processor_id();
 	cpuphyid = get_sapicid();
 
 	if (ia64_sn_get_sapic_info(cpuphyid, &nasid, &subnode, &slice))
Index: linux/include/asm-ia64/sn/sn_sal.h
===================================================================
--- linux.orig/include/asm-ia64/sn/sn_sal.h	2006-04-22 08:50:19.858482442 -0500
+++ linux/include/asm-ia64/sn/sn_sal.h	2006-04-27 17:02:24.654672135 -0500
@@ -85,6 +85,7 @@
 
 #define  SN_SAL_GET_PROM_FEATURE_SET		   0x02000065
 #define  SN_SAL_SET_OS_FEATURE_SET		   0x02000066
+#define  SN_SAL_SET_CPU_NUMBER			   0x02000068
 
 /*
  * Service-specific constants
@@ -1140,4 +1141,13 @@ ia64_sn_set_os_feature(int feature)
 	return rv.status;
 }
 
+static inline int
+ia64_sn_set_cpu_number(int cpu)
+{
+	struct ia64_sal_retval rv;
+
+	SAL_CALL_NOLOCK(rv, SN_SAL_SET_CPU_NUMBER, cpu, 0, 0, 0, 0, 0, 0);
+	return rv.status;
+}
+
 #endif /* _ASM_IA64_SN_SN_SAL_H */
-
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