[PATCH] x86_64: Allow oprofile for model P4 models
Add it for P4 model 6 - reported to work and have a similar PMU to earlier P4s. Add an p4force=1 module override parameter for future use. We had a discussion about that earlier - it's a trade off between the PMU staying compatible or not. I think the force parameter is a reasonable compromise. Cc: oprofile-list@lists.sf.net Cc: Asit Mallick <asit.k.mallick@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -13,6 +13,7 @@
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#include <linux/oprofile.h>
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#include <linux/sysdev.h>
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#include <linux/slab.h>
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#include <linux/moduleparam.h>
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#include <asm/nmi.h>
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#include <asm/msr.h>
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#include <asm/apic.h>
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@ -296,12 +297,14 @@ static int nmi_create_files(struct super_block * sb, struct dentry * root)
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return 0;
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}
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static int p4force;
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module_param(p4force, int, 0);
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static int __init p4_init(char ** cpu_type)
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{
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__u8 cpu_model = boot_cpu_data.x86_model;
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if (cpu_model > 4)
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if (!p4force && (cpu_model > 6 || cpu_model == 5))
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return 0;
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#ifndef CONFIG_SMP
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