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From: Randy Dunlap <rdunlap@infradead.org>
To: Tim Chen <tim.c.chen@linux.intel.com>,
Jiri Kosina <jikos@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
David Woodhouse <dwmw@amazon.co.uk>,
Andi Kleen <ak@linux.intel.com>,
Dave Hansen <dave.hansen@intel.com>,
Casey Schaufler <casey.schaufler@intel.com>,
Asit Mallick <asit.k.mallick@intel.com>,
Arjan van de Ven <arjan@linux.intel.com>,
Jon Masters <jcm@redhat.com>,
linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [Patch v3 13/13] x86/speculation: Create PRCTL interface to restrict indirect branch speculation
Date: Wed, 17 Oct 2018 12:12:33 -0700 [thread overview]
Message-ID: <cff6ca63-3fce-75a1-8734-048d809d4260@infradead.org> (raw)
In-Reply-To: <a04ba925a19af6ad5eaad2bc5501b7ea1ece66a9.1539798901.git.tim.c.chen@linux.intel.com>
On 10/17/18 10:59 AM, Tim Chen wrote:
>
> Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 5 +-
> Documentation/userspace-api/spec_ctrl.rst | 10 +++
> arch/x86/kernel/cpu/bugs.c | 85 ++++++++++++++++++++++++-
> include/linux/sched.h | 11 ++++
> include/uapi/linux/prctl.h | 1 +
> tools/include/uapi/linux/prctl.h | 1 +
> 6 files changed, 111 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 2feb6b2..9af11be 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -4196,7 +4196,10 @@
> lite - turn on mitigation for non-dumpable
> processes (i.e. protect daemons and other
> privileged processes that tend to be
> - non-dumpable).
> + non-dumpable), and processes that has indirect
have
> + branch speculation restricted via prctl's
> + PR_SET_SPECULATION_CTRL option
> +
> strict - protect against attacks for all user processes
> auto - let kernel decide lite or strict mode
>
--
~Randy
next prev parent reply other threads:[~2018-10-17 19:12 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-17 17:59 [Patch v3 00/13] Provide process property based options to enable Spectre v2 userspace-userspace protection Tim Chen
2018-10-17 17:59 ` [Patch v3 01/13] x86/speculation: Clean up spectre_v2_parse_cmdline Tim Chen
2018-10-18 12:43 ` Thomas Gleixner
2018-10-17 17:59 ` [Patch v3 02/13] x86/speculation: Remove unnecessary ret variable in cpu_show_common Tim Chen
2018-10-18 12:46 ` Thomas Gleixner
2018-10-17 17:59 ` [Patch v3 03/13] x86/speculation: Add static key for Enhanced IBRS Tim Chen
2018-10-18 12:50 ` Thomas Gleixner
2018-10-26 16:58 ` Waiman Long
2018-10-26 18:15 ` Tim Chen
2018-10-28 9:32 ` Thomas Gleixner
2018-10-17 17:59 ` [Patch v3 04/13] x86/speculation: Disable STIBP when enhanced IBRS is in use Tim Chen
2018-10-18 12:58 ` Thomas Gleixner
2018-10-26 17:00 ` Waiman Long
2018-10-26 18:18 ` Tim Chen
2018-10-26 18:29 ` Tim Chen
2018-10-17 17:59 ` [Patch v3 05/13] x86/smt: Create cpu_smt_enabled static key for SMT specific code Tim Chen
2018-10-18 13:03 ` Thomas Gleixner
2018-10-19 7:51 ` Peter Zijlstra
2018-10-17 17:59 ` [Patch v3 06/13] mm: Pass task instead of task->mm as argument to set_dumpable Tim Chen
2018-10-18 13:22 ` Thomas Gleixner
2018-10-19 20:02 ` Peter Zijlstra
2018-10-17 17:59 ` [Patch v3 07/13] x86/process Add arch_set_dumpable Tim Chen
2018-10-18 13:28 ` Thomas Gleixner
2018-10-18 18:46 ` Tim Chen
2018-10-19 19:12 ` Thomas Gleixner
2018-10-19 20:16 ` Thomas Gleixner
2018-10-22 23:55 ` Tim Chen
2018-10-17 17:59 ` [Patch v3 08/13] x86/speculation: Rename SSBD update functions Tim Chen
2018-10-18 13:37 ` Thomas Gleixner
2018-10-17 17:59 ` [Patch v3 09/13] x86/speculation: Reorganize SPEC_CTRL MSR update Tim Chen
2018-10-18 13:47 ` Thomas Gleixner
2018-10-26 17:21 ` Waiman Long
2018-10-26 18:25 ` Tim Chen
2018-10-17 17:59 ` [Patch v3 10/13] x86/speculation: Add per thread STIBP flag Tim Chen
2018-10-18 13:53 ` Thomas Gleixner
2018-10-17 17:59 ` [Patch v3 11/13] x86/speculation: Add Spectre v2 lite app to app protection mode Tim Chen
2018-10-18 15:12 ` Thomas Gleixner
2018-10-17 17:59 ` [Patch v3 12/13] x86/speculation: Protect non-dumpable processes against Spectre v2 attack Tim Chen
2018-10-18 15:17 ` Thomas Gleixner
2018-10-26 17:46 ` Waiman Long
2018-10-26 18:10 ` Tim Chen
2018-10-17 17:59 ` [Patch v3 13/13] x86/speculation: Create PRCTL interface to restrict indirect branch speculation Tim Chen
2018-10-17 19:12 ` Randy Dunlap [this message]
2018-10-18 15:31 ` Thomas Gleixner
2018-10-19 7:57 ` [Patch v3 00/13] Provide process property based options to enable Spectre v2 userspace-userspace protection Peter Zijlstra
2018-10-19 16:43 ` Tim Chen
2018-10-19 18:38 ` Peter Zijlstra
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