linux-kernel - Re: [PATCH 1/4] perf/x86/amd: AMD support for bp_len > HW_BREAKPOINT_LEN

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Message-ID: <538936AB.9000005@amd.com>
Date:	Fri, 30 May 2014 20:55:55 -0500
From:	Suravee Suthikulpanit <suravee.suthikulpanit@....com>
To:	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jacob Shin <jacob.w.shin@...il.com>
CC:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	xiakaixu <xiakaixu@...wei.com>
Subject: Re: [PATCH 1/4] perf/x86/amd: AMD support for bp_len > HW_BREAKPOINT_LEN_8



On 05/30/2014 08:33 AM, Frederic Weisbecker wrote:
>> diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h
>> >index 4b528a9..145b009 100644
>> >--- a/arch/x86/include/asm/debugreg.h
>> >+++ b/arch/x86/include/asm/debugreg.h
>> >@@ -114,5 +114,10 @@ static inline void debug_stack_usage_inc(void) { }
>> >  static inline void debug_stack_usage_dec(void) { }
>> >  #endif /* X86_64 */
>> >
>> >+#ifdef CONFIG_CPU_SUP_AMD
>> >+extern void set_dr_addr_mask(unsigned long mask, int dr);
>> >+#else
>> >+static inline void set_dr_addr_mask(unsigned long mask, int dr) { }
>> >+#endif
> I see this symbol in the code but it's not defined anywhere in a Kconfig file.
> Maybe you (or I) forgot to include a file in your patches?
>
> Thanks.

If you are referring to the CONFIG_CPU_SUP_AMD, this is in 
arch/x86/Kconfig.cpu

Suravee
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