From: "Woodhouse, David" <dwmw@amazon.co.uk>
To: Tim Chen <tim.c.chen@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Greg KH <gregkh@linuxfoundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andi Kleen <ak@linux.intel.com>,
Arjan Van De Ven <arjan.van.de.ven@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
"Dan Williams" <dan.j.williams@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Ashok Raj <ashok.raj@intel.com>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 3/5] x86/enter: Use IBRS on syscall and interrupts
Date: Thu, 11 Jan 2018 12:45:29 +0000 [thread overview]
Message-ID: <1515674729.22302.330.camel@amazon.co.uk> (raw)
In-Reply-To: <d5e4c03ec290c61dfbe5a769f7287817283fa6b7.1515542293.git.tim.c.chen@linux.intel.com>
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On Tue, 2018-01-09 at 18:26 -0800, Tim Chen wrote:
> Set IBRS upon kernel entrance via syscall and interrupts. Clear it
> upon exit.
In the former set of sites, you're going to want to stuff the RSB too.
The patch I sent out this morning adds the infrastructure you want for
that; we'll just want to shift it from being dependent on RETPOLINE
(both CONFIG_RETPOLINE and X86_FEATURE_RETPOLINE).
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next prev parent reply other threads:[~2018-01-11 12:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-10 2:26 [PATCH v3 0/5] IBRS patch series Tim Chen
2018-01-10 2:26 ` [PATCH v3 1/5] x86/feature: Detect the x86 IBRS feature to control Speculation Tim Chen
2018-01-10 2:26 ` [PATCH v3 2/5] x86/enter: Create macros to set/clear IBRS Tim Chen
2018-01-11 16:04 ` Thomas Gleixner
2018-01-11 21:05 ` Tim Chen
2018-01-11 21:24 ` Tim Chen
2018-01-10 2:26 ` [PATCH v3 3/5] x86/enter: Use IBRS on syscall and interrupts Tim Chen
2018-01-10 10:04 ` Peter Zijlstra
2018-01-10 11:27 ` Paolo Bonzini
2018-01-10 18:16 ` Tim Chen
2018-01-10 18:28 ` Peter Zijlstra
2018-01-10 18:44 ` Tim Chen
2018-01-10 18:47 ` Van De Ven, Arjan
2018-01-11 12:45 ` Woodhouse, David [this message]
2018-01-10 2:26 ` [PATCH v3 4/5] x86/ibrs: Create boot option for IBRS Tim Chen
2018-01-10 2:26 ` [PATCH v3 5/5] x86/idle: Disable IBRS entering idle and enable it on wakeup Tim Chen
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