Commit d175ed2b authored Sep 11, 2014 by Paul Burton Committed by Ralf Baechle Nov 24, 2014

MIPS: Ensure Config5.UFE is clear on boot



As is done for UFR, ensure that userland cannot directly manipulate the
mode by clearing the UFE bit during boot.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7677/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent adac5d53

arch/mips/kernel/cpu-probe.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -461,7 +461,7 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c)
	unsigned int config5;		unsigned int config5;

	config5 = read_c0_config5();		config5 = read_c0_config5();
	config5 &= ~MIPS_CONF5_UFR;		config5 &= ~(MIPS_CONF5_UFR \| MIPS_CONF5_UFE);
	write_c0_config5(config5);		write_c0_config5(config5);

	if (config5 & MIPS_CONF5_EVA)		if (config5 & MIPS_CONF5_EVA)