From: "Van De Ven, Arjan" <arjan.van.de.ven@intel.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>,
Andy Lutomirski <luto@amacapital.net>,
Jon Masters <jcm@jonmasters.org>
Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br>,
Andi Kleen <andi@firstfloor.org>,
David Woodhouse <dwmw2@infradead.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"x86@kernel.org" <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"pjt@google.com" <pjt@google.com>,
"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
"gregkh@linux-foundation.org" <gregkh@linux-foundation.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"thomas.lendacky@amd.com" <thomas.lendacky@amd.com>
Subject: RE: Improve retpoline for Skylake
Date: Mon, 15 Jan 2018 17:56:56 +0000 [thread overview]
Message-ID: <0575AF4FD06DD142AD198903C74E1CC87A5CC692@FMSMSX151.amr.corp.intel.com> (raw)
In-Reply-To: <445ec6c6-a835-fbdc-dca3-222a73d19816@citrix.com>
> Having firmware refill the RSB only makes a difference if you are on
> Skylake+ were RSB underflows are bad, and you're not using IBRS to
> protect your indirect predictions.
... and before that you don't need it.
next prev parent reply other threads:[~2018-01-15 17:57 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-12 18:45 Andi Kleen
2018-01-12 18:45 ` [PATCH 1/4] x86/retpoline: Add new mode RETPOLINE_UNDERFLOW Andi Kleen
2018-01-12 22:13 ` Dominik Brodowski
2018-01-12 22:57 ` Andi Kleen
2018-01-12 18:45 ` [PATCH 2/4] x86/retpoline: Avoid return buffer underflows on context switch Andi Kleen
2018-01-12 18:45 ` [PATCH 3/4] x86/retpoline: Fill return buffer after idle Andi Kleen
2018-01-12 18:45 ` [PATCH 4/4] x86/retpoline: Fill return buffer on interrupt return to kernel Andi Kleen
2018-01-12 19:12 ` Improve retpoline for Skylake David Woodhouse
2018-01-12 19:21 ` Andi Kleen
2018-01-12 22:03 ` Henrique de Moraes Holschuh
2018-01-15 8:26 ` Jon Masters
2018-01-15 9:06 ` David Woodhouse
2018-01-15 10:03 ` Thomas Gleixner
2018-01-15 10:20 ` David Woodhouse
2018-01-15 16:57 ` Andy Lutomirski
2018-01-15 17:38 ` Andrew Cooper
2018-01-15 17:56 ` Van De Ven, Arjan [this message]
2018-01-15 18:06 ` Andy Lutomirski
2018-01-15 18:07 ` David Woodhouse
2018-01-15 18:10 ` Andy Lutomirski
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