From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King - ARM Linux Subject: Re: [PATCH 5/5] ARM: spectre-v2: per-CPU vtables to work around big.Little systems Date: Fri, 5 Oct 2018 10:46:19 +0100 Message-ID: <20181005094618.GG30658@n2100.armlinux.org.uk> References: <20180919094802.GH30658@n2100.armlinux.org.uk> <20181005090941eucas1p14031cd38d78e9d561975925bf977727d~aq0-OFZeE1866318663eucas1p1b@eucas1p1.samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: <20181005090941eucas1p14031cd38d78e9d561975925bf977727d~aq0-OFZeE1866318663eucas1p1b@eucas1p1.samsung.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Marek Szyprowski Cc: Mark Rutland , 'Linux Samsung SOC' , Julien Thierry , Marc Zyngier , Will Deacon , Krzysztof Kozlowski , Dietmar Eggemann , Morten Rasmussen , linux-arm-kernel@lists.infradead.org, Qais Yousef List-Id: linux-samsung-soc@vger.kernel.org On Fri, Oct 05, 2018 at 11:09:40AM +0200, Marek Szyprowski wrote: > This patch causes lots of kernel 'BUG' messages on all Samsung Exynos > boards.=A0 It started to appear since it has been merged to linux-next > on 20181002.=A0 I wonder if this issue is Exynos specific or there are > some patches missing in linux-next, which should fix those 'BUGS'. > If this is Exynos specific, please let us know what should be changed > in Exynos platform code to avoid this issue. Thanks for the report. It looks like my solution for big.Little isn't possible... back to the drawing board, and big.Little will have to remain vulnerable to Spectre for another release cycle. -- = RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps = up According to speedtest.net: 11.9Mbps down 500kbps up