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[POWERPC] powerpc: Clear HID0 attention enable on PPC970 at boot time
author
Olof Johansson
<olof@lixom.net>
Mon, 7 Aug 2006 01:51:25 +0000
(20:51 -0500)
committer
Paul Mackerras
<paulus@samba.org>
Thu, 17 Aug 2006 21:23:29 +0000
(07:23 +1000)
Clear HID0[en_attn] at CPU init time on PPC970. Closes CVE-2006-4093.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/kernel/cpu_setup_power4.S
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diff --git
a/arch/powerpc/kernel/cpu_setup_power4.S
b/arch/powerpc/kernel/cpu_setup_power4.S
index
f69af2c
..
76e97aa
100644
(file)
--- a/
arch/powerpc/kernel/cpu_setup_power4.S
+++ b/
arch/powerpc/kernel/cpu_setup_power4.S
@@
-76,6
+76,8
@@
_GLOBAL(__setup_cpu_ppc970)
mfspr r0,SPRN_HID0
li r11,5 /* clear DOZE and SLEEP */
rldimi r0,r11,52,8 /* set NAP and DPM */
+ li r11,0
+ rldimi r0,r11,32,31 /* clear EN_ATTN */
mtspr SPRN_HID0,r0
mfspr r0,SPRN_HID0
mfspr r0,SPRN_HID0