[Xen-ia64-devel] Fix the misaddressing issue in PERCPU DATA

["Dong, Eddie" <eddie.dong@xxxxxxxxx>]

Dan:
        Following patch is to fix the potential issue in low level code
addressing for PERCPU DATA. It is fortunately to be ok now as cpu_info
layout is in the beginning of PERCPU data.
        If you agree, I will put it into staging tree.
Eddie



# HG changeset patch
# User ydong@xxxxxxxxxxxxxxxxxxxxx
# Node ID 90c6abbd4a59fd90718f3b798c0ce75ba4d7445c
# Parent  8bd2dc2c653de47bd9ab07a748ed6cb60f112701
Remove misaddressing of cpu_info in PERCPU data

signed-off-by Eddie dong <eddie.dong@xxxxxxxxx>

diff -r 8bd2dc2c653d -r 90c6abbd4a59 xen/arch/ia64/hyperprivop.S
--- a/xen/arch/ia64/hyperprivop.S       Thu Aug 11 09:47:31 2005
+++ b/xen/arch/ia64/hyperprivop.S       Fri Aug 12 03:16:25 2005
@@ -306,7 +306,7 @@
        mov r28=IA64_TIMER_VECTOR;;
        cmp.ne p6,p0=r28,r30
 (p6)   br.cond.spnt.few rp;;
-       movl r20=(PERCPU_ADDR)+IA64_CPUINFO_ITM_NEXT_OFFSET;;
+       movl r20=THIS_CPU(cpu_info)+IA64_CPUINFO_ITM_NEXT_OFFSET;;
        ld8 r26=[r20];;
        mov r27=ar.itc;;
        adds r27=200,r27;;      // safety margin
@@ -1305,7 +1305,7 @@
        adds r21=1,r21;;
        st8 [r20]=r21;;
 #endif
-       movl r20=(PERCPU_ADDR)+IA64_CPUINFO_ITM_NEXT_OFFSET;;
+       movl r20=THIS_CPU(cpu_info)+IA64_CPUINFO_ITM_NEXT_OFFSET;;
        ld8 r21=[r20];;
        mov r20=IA64_KR(CURRENT);;
        adds r20=IA64_VCPU_DOMAIN_ITM_OFFSET,r20;;
diff -r 8bd2dc2c653d -r 90c6abbd4a59 xen/arch/ia64/ivt.S
--- a/xen/arch/ia64/ivt.S       Thu Aug 11 09:47:31 2005
+++ b/xen/arch/ia64/ivt.S       Fri Aug 12 03:16:25 2005
@@ -934,7 +934,7 @@
        // FIXME: this is a hack... use cpuinfo.ksoftirqd because its
        // not used anywhere else and we need a place to stash ivr and
        // there's no registers available unused by SAVE_MIN/REST
-       movl r29=(PERCPU_ADDR)+IA64_CPUINFO_KSOFTIRQD_OFFSET;;
+       movl r29=THIS_CPU(cpu_info)+IA64_CPUINFO_KSOFTIRQD_OFFSET;;
        st8 [r29]=r30;;
        movl r28=slow_interrupt;;
        mov r29=rp;;
@@ -954,7 +954,7 @@
        ;;
        alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group
 #ifdef XEN
-       movl out0=(PERCPU_ADDR)+IA64_CPUINFO_KSOFTIRQD_OFFSET;;
+       movl out0=THIS_CPU(cpu_info)+IA64_CPUINFO_KSOFTIRQD_OFFSET;;
        ld8 out0=[out0];;
 #else
        mov out0=cr.ivr         // pass cr.ivr as first arg

Attachment: remove_kr_pre.patch
Description: remove_kr_pre.patch

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