Re: CPU boot problem on 2.6.0-test3-bk8

[William Lee Irwin III <wli@holomorphy.com>]

On Thu, Aug 21, 2003 at 02:33:50PM -0700, William Lee Irwin III wrote:
>> cpu_present_to_apicid() needs a similar treatment to dhansen's prior
>> bits. diff incoming shortly.

On Thu, Aug 21, 2003 at 03:17:44PM -0700, William Lee Irwin III wrote:
> Could one of you two try this out on a Summit machine in addition to
> Dave's prior patch (or hook me up to one)?

That broke sparse APIC ID's on several subarches. This is a bit less
indiscriminate about who it updates (and should replace the prior patch
wrt. sending anything upstream):


-- wli


===== include/asm-i386/mach-bigsmp/mach_apic.h 1.16 vs edited =====
--- 1.16/include/asm-i386/mach-bigsmp/mach_apic.h	Wed Aug 20 22:32:06 2003
+++ edited/include/asm-i386/mach-bigsmp/mach_apic.h	Thu Aug 21 15:07:42 2003
@@ -86,7 +86,10 @@
 
 static inline int cpu_present_to_apicid(int mps_cpu)
 {
-	return (int) bios_cpu_apicid[mps_cpu];
+	if (mps_cpu < NR_CPUS)
+		return (int)bios_cpu_apicid[mps_cpu];
+	else
+		return BAD_APICID;
 }
 
 static inline physid_mask_t apicid_to_cpu_present(int phys_apicid)
===== include/asm-i386/mach-es7000/mach_apic.h 1.3 vs edited =====
--- 1.3/include/asm-i386/mach-es7000/mach_apic.h	Wed Aug 20 22:32:06 2003
+++ edited/include/asm-i386/mach-es7000/mach_apic.h	Thu Aug 21 15:08:41 2003
@@ -106,8 +106,10 @@
 {
 	if (!mps_cpu)
 		return boot_cpu_physical_apicid;
-	else
+	else if (mps_cpu < NR_CPUS)
 		return (int) bios_cpu_apicid[mps_cpu];
+	else
+		return BAD_APICID;
 }
 
 static inline physid_mask_t apicid_to_cpu_present(int phys_apicid)
===== include/asm-i386/mach-numaq/mach_apic.h 1.22 vs edited =====
--- 1.22/include/asm-i386/mach-numaq/mach_apic.h	Wed Aug 20 22:32:06 2003
+++ edited/include/asm-i386/mach-numaq/mach_apic.h	Thu Aug 21 15:10:31 2003
@@ -65,9 +65,17 @@
 	return (int)cpu_2_logical_apicid[cpu];
 }
 
+/*
+ * Supporting over 60 cpus on NUMA-Q requires a locality-dependent
+ * cpu to APIC ID relation to properly interact with the intelligent
+ * mode of the cluster controller.
+ */
 static inline int cpu_present_to_apicid(int mps_cpu)
 {
-	return ((mps_cpu >> 2) << 4) | (1 << (mps_cpu & 0x3));
+	if (mps_cpu < 60)
+		return ((mps_cpu >> 2) << 4) | (1 << (mps_cpu & 0x3));
+	else
+		return BAD_APICID;
 }
 
 static inline int generate_logical_apicid(int quad, int phys_apicid)
===== include/asm-i386/mach-summit/mach_apic.h 1.31 vs edited =====
--- 1.31/include/asm-i386/mach-summit/mach_apic.h	Wed Aug 20 22:32:06 2003
+++ edited/include/asm-i386/mach-summit/mach_apic.h	Thu Aug 21 15:10:57 2003
@@ -87,7 +87,10 @@
 
 static inline int cpu_present_to_apicid(int mps_cpu)
 {
-	return (int) bios_cpu_apicid[mps_cpu];
+	if (mps_cpu < NR_CPUS)
+		return (int)bios_cpu_apicid[mps_cpu];
+	else
+		return BAD_APICID;
 }
 
 static inline physid_mask_t ioapic_phys_id_map(physid_mask_t phys_id_map)