linux-kernel - Re: [PATCH 1/6] perf_counter: powerpc: Enable use of software counters on 32-bit powerpc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 17 Jun 2009 09:10:49 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	Ingo Molnar <mingo@...e.hu>, benh@...nel.crashing.org,
	linuxppc-dev@...abs.org, Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] perf_counter: powerpc: Enable use of software counters on 32-bit powerpc


On Jun 17, 2009, at 6:50 AM, Paul Mackerras wrote:

> diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/ 
> platforms/Kconfig.cputype
> index cca6b4f..dd9f3ec 100644
> --- a/arch/powerpc/platforms/Kconfig.cputype
> +++ b/arch/powerpc/platforms/Kconfig.cputype
> @@ -1,7 +1,7 @@
> config PPC64
> 	bool "64-bit kernel"
> 	default n
> -	select HAVE_PERF_COUNTERS
> +	select PPC_HAVE_PMU_SUPPORT
> 	help
> 	  This option selects whether a 32-bit or a 64-bit kernel
> 	  will be built.
> @@ -243,6 +243,15 @@ config VIRT_CPU_ACCOUNTING
>
> 	  If in doubt, say Y here.
>
> +config PPC_HAVE_PMU_SUPPORT
> +       bool

what does this mean?

> +
> +config PPC_PERF_CTRS
> +       def_bool y
> +       depends on PERF_COUNTERS && PPC_HAVE_PMU_SUPPORT
> +       help
> +         This enables the powerpc-specific perf_counter back-end.

Can we distinguish between the two different architected perf counters  
programming models to start with.  Maybe something like:

PPC_BOOK3S_PERF_CTRS and PPC_BOOK3E_PERF_CTRS (or  
PPC_SERVER_PERF_CTRS / PPC_EMB_PERF_CTRS)


>
> +
> config SMP
> 	depends on PPC_STD_MMU || FSL_BOOKE
> 	bool "Symmetric multi-processing support"
> -- 
> 1.6.0.4
>

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/