Re: FW: [ia64 R&D] CONFIG_IA64_MCA

[Jesse Barnes <jbarnes@engr.sgi.com>]

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John> Hi, I have heard rumors that the CONFIG_IA64_MCA option may be
John> phased out. If this is true, this email is an attempt to lobby
John> AGAINST such a move.  I work with a team that explicitly
John> disables the CONFIG_IA64_MCA so that the kernel will NOT
John> handle MCAs. If kernel handling of MCAs is made automatic,
John> then that would interfere with our use of the
John> kernel. Hopefully, this rumor is false.

Too bad you didn't send this message to the linux-ia64 list at the time I 
posted the patch.  Oh well.  Here's the original patch that you can revert 
with 'patch -R'.  I'll put something better together shortly.

Jesse

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===== arch/ia64/Kconfig 1.63 vs edited =====
--- 1.63/arch/ia64/Kconfig	Thu Mar 11 12:58:54 2004
+++ edited/arch/ia64/Kconfig	Mon Mar 15 14:21:32 2004
@@ -238,13 +238,6 @@
 	  or have huge holes in the physical address space for other reasons.
 	  See <file:Documentation/vm/numa> for more.
 
-config IA64_MCA
-	bool "Machine Check Abort"
-	default y if !IA64_HP_SIM
-	help
-	  Say Y here to enable machine check support for IA-64.  If you're
-	  unsure, answer Y.
-
 config IA64_CYCLONE
 	bool "Support Cyclone(EXA) Time Source"
 	help
===== arch/ia64/kernel/Makefile 1.29 vs edited =====
--- 1.29/arch/ia64/kernel/Makefile	Mon Feb 23 17:44:56 2004
+++ edited/arch/ia64/kernel/Makefile	Mon Mar 15 14:17:01 2004
@@ -6,13 +6,12 @@
 
 obj-y := acpi.o entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o	\
 	 irq_lsapic.o ivt.o machvec.o pal.o patch.o process.o perfmon.o ptrace.o sal.o		\
-	 salinfo.o semaphore.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o unwind.o
+	 salinfo.o semaphore.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o unwind.o mca.o mca_asm.o
 
 obj-$(CONFIG_EFI_VARS)		+= efivars.o
 obj-$(CONFIG_IA64_BRL_EMU)	+= brl_emu.o
 obj-$(CONFIG_IA64_GENERIC)	+= acpi-ext.o
 obj-$(CONFIG_IA64_HP_ZX1)	+= acpi-ext.o
-obj-$(CONFIG_IA64_MCA)		+= mca.o mca_asm.o
 obj-$(CONFIG_IA64_PALINFO)	+= palinfo.o
 obj-$(CONFIG_IOSAPIC)		+= iosapic.o
 obj-$(CONFIG_MODULES)		+= module.o
===== arch/ia64/kernel/efi.c 1.29 vs edited =====
--- 1.29/arch/ia64/kernel/efi.c	Mon Jan  5 07:43:05 2004
+++ edited/arch/ia64/kernel/efi.c	Mon Mar 15 14:20:10 2004
@@ -399,9 +399,7 @@
 	int pal_code_count = 0;
 	u64 mask, psr;
 	u64 vaddr;
-#ifdef CONFIG_IA64_MCA
 	int cpu;
-#endif
 
 	efi_map_start = __va(ia64_boot_param->efi_memmap);
 	efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
@@ -463,13 +461,11 @@
 		ia64_set_psr(psr);		/* restore psr */
 		ia64_srlz_i();
 
-#ifdef CONFIG_IA64_MCA
 		cpu = smp_processor_id();
 
 		/* insert this TR into our list for MCA recovery purposes */
 		ia64_mca_tlb_list[cpu].pal_base = vaddr & mask;
 		ia64_mca_tlb_list[cpu].pal_paddr = pte_val(mk_pte_phys(md->phys_addr, PAGE_KERNEL));
-#endif
 	}
 }
 
===== arch/ia64/kernel/setup.c 1.68 vs edited =====
--- 1.68/arch/ia64/kernel/setup.c	Mon Jan 19 15:38:10 2004
+++ edited/arch/ia64/kernel/setup.c	Mon Mar 15 14:20:19 2004
@@ -355,10 +355,8 @@
 # endif
 #endif
 
-#ifdef CONFIG_IA64_MCA
 	/* enable IA-64 Machine Check Abort Handling */
 	ia64_mca_init();
-#endif
 
 	platform_setup(cmdline_p);
 	paging_init();
===== arch/ia64/kernel/smpboot.c 1.47 vs edited =====
--- 1.47/arch/ia64/kernel/smpboot.c	Thu Feb 12 16:54:17 2004
+++ edited/arch/ia64/kernel/smpboot.c	Mon Mar 15 14:20:27 2004
@@ -300,9 +300,7 @@
 	 */
 	ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
 
-#ifdef CONFIG_IA64_MCA
 	ia64_mca_cmc_vector_setup();	/* Setup vector on AP & enable */
-#endif
 
 #ifdef CONFIG_PERFMON
 	pfm_init_percpu();
===== arch/ia64/mm/init.c 1.56 vs edited =====
--- 1.56/arch/ia64/mm/init.c	Thu Feb 26 12:18:51 2004
+++ edited/arch/ia64/mm/init.c	Mon Mar 15 14:20:43 2004
@@ -279,9 +279,7 @@
 {
 	unsigned long psr, pta, impl_va_bits;
 	extern void __init tlb_init (void);
-#ifdef CONFIG_IA64_MCA
 	int cpu;
-#endif
 
 #ifdef CONFIG_DISABLE_VHPT
 #	define VHPT_ENABLE_BIT	0
@@ -346,7 +344,6 @@
 	ia64_set_rr(HPAGE_REGION_BASE, HPAGE_SHIFT << 2);
 #endif
 
-#ifdef	CONFIG_IA64_MCA
 	cpu = smp_processor_id();
 
 	/* mca handler uses cr.lid as key to pick the right entry */
@@ -360,7 +357,6 @@
 	ia64_mca_tlb_list[cpu].ptce_count[1] = local_cpu_data->ptce_count[1];
 	ia64_mca_tlb_list[cpu].ptce_stride[0] = local_cpu_data->ptce_stride[0];
 	ia64_mca_tlb_list[cpu].ptce_stride[1] = local_cpu_data->ptce_stride[1];
-#endif
 }
 
 #ifdef CONFIG_VIRTUAL_MEM_MAP
===== arch/ia64/sn/kernel/setup.c 1.33 vs edited =====
--- 1.33/arch/ia64/sn/kernel/setup.c	Sat Feb 14 23:22:40 2004
+++ edited/arch/ia64/sn/kernel/setup.c	Mon Mar 15 14:19:50 2004
@@ -194,10 +194,7 @@
 	}
 }
 
-#ifdef CONFIG_IA64_MCA
 extern int platform_intr_list[];
-#endif
-
 extern nasid_t master_nasid;
 static int shub_1_1_found __initdata;