From 9a936a2e0526089194159eae31238e36b1c19e74 Mon Sep 17 00:00:00 2001 From: Olof Johansson Date: Sun, 6 Aug 2006 20:51:25 -0500 Subject: [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 Signed-off-by: Paul Mackerras diff --git a/arch/powerpc/kernel/cpu_setup_power4.S b/arch/powerpc/kernel/cpu_setup_power4.S index f69af2c..76e97aa 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 -- cgit v0.10.2