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| author | Olof Johansson <olof@lixom.net> | 2006-08-06 20:51:25 -0500 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-08-18 07:23:29 +1000 |
| commit | 9a936a2e0526089194159eae31238e36b1c19e74 (patch) | |
| tree | fbc8063ccd2c78eeb135047f5a603b6f0d7b8959 | |
| parent | e5c14ce118ab6a96afb2af5c4ec9727b03ab1936 (diff) | |
| download | linux-9a936a2e0526089194159eae31238e36b1c19e74.tar.bz2 | |
[POWERPC] powerpc: Clear HID0 attention enable on PPC970 at boot time
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>
| -rw-r--r-- | arch/powerpc/kernel/cpu_setup_power4.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/cpu_setup_power4.S b/arch/powerpc/kernel/cpu_setup_power4.S index f69af2c5d7b3..76e97aa71c45 100644 --- 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 |