From mboxrd@z Thu Jan  1 00:00:00 1970
From: linux@armlinux.org.uk (Russell King - ARM Linux)
Date: Wed, 19 Sep 2018 10:48:02 +0100
Subject: [PATCH 0/5] Spectre big.Little updates
Message-ID: <20180919094802.GH30658@n2100.armlinux.org.uk>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

This series of patches allows Spectre to be worked around on
big.Little systems, and as far as I'm aware, completes the Spectre
workarounds as were known at the beginning of the year for 32-bit
ARM.

In order to solve Spectre for such systems, we need to introduce
per-CPU indirection of the "processor" vtable, but we are unable to
use the kernel's per-CPU infrastructure as this is not initialised
early enough.

To work around that, we fall back to using a static array of
processor vtables indexed by the logical CPU number.  This should
not be a problem as 32-bit ARM systems are limited to 8 logical
CPUs.

 arch/arm/include/asm/cputype.h  |  2 ++
 arch/arm/include/asm/proc-fns.h | 49 ++++++++++++++++++++++++++++++++---------
 arch/arm/kernel/bugs.c          |  4 ++--
 arch/arm/kernel/head-common.S   |  6 ++---
 arch/arm/kernel/setup.c         | 40 ++++++++++++++++++++-------------
 arch/arm/kernel/smp.c           | 31 ++++++++++++++++++++++++++
 arch/arm/mm/proc-v7-bugs.c      | 17 ++------------
 7 files changed, 103 insertions(+), 46 deletions(-)

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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