Commit 9a936a2e authored Aug 06, 2006 by Olof Johansson Committed by Paul Mackerras Aug 18, 2006

[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>

parent e5c14ce1

arch/powerpc/kernel/cpu_setup_power4.S

+2 −0

Original line number	Diff line number	Diff line
		@@ -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