From: Mark Rutland <mark.rutland@arm.com>
Date: Tue, 9 Jul 2013 14:16:06 +0000 (+0100)
Subject: arm64: virt: ensure visibility of __boot_cpu_mode
X-Git-Tag: v3.11-rc3~7^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82b2f495fba338d1e3098dde1df54944a9c19751;p=pandora-kernel.git

arm64: virt: ensure visibility of __boot_cpu_mode

Secondary CPUs write to __boot_cpu_mode with caches disabled, and thus a
cached value of __boot_cpu_mode may be incoherent with that in memory.
This could lead to a failure to detect mismatched boot modes.

This patch adds flushing to ensure that writes by secondaries to
__boot_cpu_mode are made visible before we test against it.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

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