linux-kernel - Re: [PATCH v2 3/8] perf/amd/ibs: Add support for L3 miss filtering

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]

Message-ID: <YnkDfRIRyztvXv6o@hirez.programming.kicks-ass.net>
Date:   Mon, 9 May 2022 14:05:17 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Ravi Bangoria <ravi.bangoria@....com>
Cc:     acme@...nel.org, rrichter@....com, mingo@...hat.com,
        mark.rutland@....com, jolsa@...nel.org, namhyung@...nel.org,
        tglx@...utronix.de, bp@...en8.de, irogers@...gle.com,
        yao.jin@...ux.intel.com, james.clark@....com, leo.yan@...aro.org,
        kan.liang@...ux.intel.com, ak@...ux.intel.com, eranian@...gle.com,
        like.xu.linux@...il.com, x86@...nel.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        sandipan.das@....com, ananth.narayan@....com, kim.phillips@....com,
        santosh.shukla@....com
Subject: Re: [PATCH v2 3/8] perf/amd/ibs: Add support for L3 miss filtering

On Mon, May 09, 2022 at 10:19:09AM +0530, Ravi Bangoria wrote:
> diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
> index b06e4c573add..a24b637a6e1d 100644
> --- a/arch/x86/include/asm/perf_event.h
> +++ b/arch/x86/include/asm/perf_event.h
> @@ -391,6 +391,7 @@ struct pebs_xmm {
>  #define IBS_CAPS_OPBRNFUSE		(1U<<8)
>  #define IBS_CAPS_FETCHCTLEXTD		(1U<<9)
>  #define IBS_CAPS_OPDATA4		(1U<<10)
> +#define IBS_CAPS_ZEN4IBSEXTENSIONS	(1U<<11)
>  
>  #define IBS_CAPS_DEFAULT		(IBS_CAPS_AVAIL		\
>  					 | IBS_CAPS_FETCHSAM	\

Would you mind terribly if I do:

  's/IBS_CAPS_ZEN4IBSEXTENSIONS/IBS_CAPS_ZEN4/'

on it? Per the IBS_ suffix, we're already talking about IBS, per the
CAPS thing we're talking about capabilities and I'm thinking that makes
EXTENTION somewhat redundant, which then leaves:

  IBS_CAPS_ZEN4