From: Jimi Xenidis Date: Wed, 21 Jun 2006 23:15:55 +0000 (-0400) Subject: [POWERPC] Don't access HID registers if running on a Hypervisor. X-Git-Tag: v2.6.18-rc1~358^2~41 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d7c466292fc7c90bb160c1c7df74035c7c12595;p=linux-2.6 [POWERPC] Don't access HID registers if running on a Hypervisor. The following patch avoids accessing Hypervisor privilege HID registers when running on a Hypervisor (MSR[HV]=0). Signed-off-by: Jimi Xenidis Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/kernel/cpu_setup_power4.S b/arch/powerpc/kernel/cpu_setup_power4.S index 271418308d..1fc8632610 100644 --- a/arch/powerpc/kernel/cpu_setup_power4.S +++ b/arch/powerpc/kernel/cpu_setup_power4.S @@ -125,7 +125,12 @@ _GLOBAL(__save_cpu_setup) cmpwi r0,0x44 bne 2f -1: /* Save HID0,1,4 and 5 */ +1: /* skip if not running in HV mode */ + mfmsr r0 + rldicl. r0,r0,4,63 + beq 2f + + /* Save HID0,1,4 and 5 */ mfspr r3,SPRN_HID0 std r3,CS_HID0(r5) mfspr r3,SPRN_HID1 @@ -159,7 +164,12 @@ _GLOBAL(__restore_cpu_setup) cmpwi r0,0x44 bnelr -1: /* Before accessing memory, we make sure rm_ci is clear */ +1: /* skip if not running in HV mode */ + mfmsr r0 + rldicl. r0,r0,4,63 + beqlr + + /* Before accessing memory, we make sure rm_ci is clear */ li r0,0 mfspr r3,SPRN_HID4 rldimi r3,r0,40,23 /* clear bit 23 (rm_ci) */