[PATCH 06/10] MIPS: ensure Config5.UFE is clear on boot

From: Paul Burton
Date: Thu Sep 11 2014 - 04:39:21 EST


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@xxxxxxxxxx>
---
arch/mips/kernel/cpu-probe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index db929a0..4e2a6e0 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -400,7 +400,7 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c)
unsigned int config5;

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

if (config5 & MIPS_CONF5_EVA)
--
2.0.4

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