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From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
To: Alexey Budankov <alexey.budankov@linux.intel.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Ingo Molnar <mingo@redhat.com>,
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	"joonas.lahtinen@linux.intel.com"
	<joonas.lahtinen@linux.intel.com>,
	"rodrigo.vivi@intel.com" <rodrigo.vivi@intel.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Serge Hallyn <serge@hallyn.com>, James Morris <jmorris@namei.org>,
	Casey Schaufler <casey@schaufler-ca.com>
Cc: songliubraving@fb.com, Andi Kleen <ak@linux.intel.com>,
	Kees Cook <keescook@chromium.org>,
	"linux-parisc@vger.kernel.org" <linux-parisc@vger.kernel.org>,
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	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	intel-gfx@lists.freedesktop.org,
	Igor Lubashev <ilubashe@akamai.com>,
	linux-kernel@vger.kernel.org,
	Stephane Eranian <eranian@google.com>,
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	<linux-perf-users@vger.kernel.org>,
	"selinux@vger.kernel.org" <selinux@vger.kernel.org>,
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	<linux-security-module@vger.kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Brendan Gregg <bgregg@netflix.com>, Jiri Olsa <jolsa@redhat.com>,
	"bpf@vger.kernel.org" <bpf@vger.kernel.org>
Subject: Re: [Intel-gfx] [PATCH v3 4/7] drm/i915/perf: open access for CAP_SYS_PERFMON privileged process
Date: Tue, 17 Dec 2019 11:45:20 +0200
Message-ID: <503ad40c-d94e-df1d-1541-730c002ad3b7@intel.com> (raw)
In-Reply-To: <bc5b2a0d-a185-91b6-5deb-a4b6e1dc3d3e@linux.intel.com>

On 16/12/2019 22:03, Alexey Budankov wrote:
> Open access to i915_perf monitoring for CAP_SYS_PERFMON privileged processes.
> For backward compatibility reasons access to i915_perf subsystem remains open
> for CAP_SYS_ADMIN privileged processes but CAP_SYS_ADMIN usage for secure
> i915_perf monitoring is discouraged with respect to CAP_SYS_PERFMON capability.
>
> Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>


Assuming people are fine with this new cap, I like this idea of a 
lighter privilege for i915-perf.


-Lionel



  reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-16 19:52 [PATCH v3 0/7] Introduce CAP_SYS_PERFMON to secure system performance monitoring and observability Alexey Budankov
2019-12-16 19:58 ` [PATCH v3 1/7] capabilities: introduce CAP_SYS_PERFMON to kernel and user space Alexey Budankov
2019-12-17 15:02   ` Stephen Smalley
2019-12-16 19:59 ` [PATCH v3 2/7] perf/core: open access for CAP_SYS_PERFMON privileged process Alexey Budankov
2019-12-16 20:00 ` [PATCH v3 3/7] perf tool: extend Perf tool with CAP_SYS_PERFMON capability support Alexey Budankov
2019-12-16 20:03 ` [PATCH v3 4/7] drm/i915/perf: open access for CAP_SYS_PERFMON privileged process Alexey Budankov
2019-12-17  9:45   ` Lionel Landwerlin [this message]
2019-12-17 11:38     ` [Intel-gfx] " Alexey Budankov
2019-12-16 20:03 ` [PATCH v3 5/7] trace/bpf_trace: " Alexey Budankov
2019-12-16 20:04 ` [PATCH v3 6/7] powerpc/perf: " Alexey Budankov
2019-12-16 20:05 ` [PATCH v3 7/7] parisc/perf: " Alexey Budankov

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