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authorKeith Owens <kaos@sgi.com>2006-04-07 10:34:34 +0400
committerTony Luck <tony.luck@intel.com>2006-04-08 10:01:32 +0400
commit8cab7ccccbdd9fe3cf6b3400d5a88ecb683a5b1b (patch)
tree7d847ecf60940f7dae3e12240fc48184e68b87b8 /arch/ia64/kernel/mca_asm.S
parent958b166c00b39ff0b28ad2bbb32624b9f305a4e1 (diff)
downloadlinux-8cab7ccccbdd9fe3cf6b3400d5a88ecb683a5b1b.tar.xz
[IA64] Failure to resume after INIT in user space
The OS INIT handler is loading incorrect values into cr.ifa on exit. This shows up as a hang when resuming after an INIT that is delivered while a cpu is in user space. Correct the value loaded into cr.ifa. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/mca_asm.S')
-rw-r--r--arch/ia64/kernel/mca_asm.S10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S
index 60a464bfd9e2..6dff024cd62b 100644
--- a/arch/ia64/kernel/mca_asm.S
+++ b/arch/ia64/kernel/mca_asm.S
@@ -827,7 +827,7 @@ ia64_state_restore:
ld8 r9=[temp2],16 // sal_gp
;;
ld8 r22=[temp1],16 // pal_min_state, virtual
- ld8 r21=[temp2],16 // prev_IA64_KR_CURRENT
+ ld8 r13=[temp2],16 // prev_IA64_KR_CURRENT
;;
ld8 r16=[temp1],16 // prev_IA64_KR_CURRENT_STACK
ld8 r20=[temp2],16 // prev_task
@@ -848,7 +848,7 @@ ia64_state_restore:
mov cr.iim=temp3
mov cr.iha=temp4
dep r22=0,r22,62,1 // pal_min_state, physical, uncached
- mov IA64_KR(CURRENT)=r21
+ mov IA64_KR(CURRENT)=r13
ld8 r8=[temp1] // os_status
ld8 r10=[temp2] // context
@@ -856,7 +856,7 @@ ia64_state_restore:
* avoid any dependencies on the algorithm in ia64_switch_to(), just
* purge any existing CURRENT_STACK mapping and insert the new one.
*
- * r16 contains prev_IA64_KR_CURRENT_STACK, r21 contains
+ * r16 contains prev_IA64_KR_CURRENT_STACK, r13 contains
* prev_IA64_KR_CURRENT, these values may have been changed by the C
* code. Do not use r8, r9, r10, r22, they contain values ready for
* the return to SAL.
@@ -873,7 +873,7 @@ ia64_state_restore:
;;
srlz.d
- extr.u r19=r21,61,3 // r21 = prev_IA64_KR_CURRENT
+ extr.u r19=r13,61,3 // r13 = prev_IA64_KR_CURRENT
shl r20=r16,IA64_GRANULE_SHIFT // r16 = prev_IA64_KR_CURRENT_STACK
movl r21=PAGE_KERNEL // page properties
;;
@@ -883,7 +883,7 @@ ia64_state_restore:
(p6) br.spnt 1f // the dreaded cpu 0 idle task in region 5:(
;;
mov cr.itir=r18
- mov cr.ifa=r21
+ mov cr.ifa=r13
mov r20=IA64_TR_CURRENT_STACK
;;
itr.d dtr[r20]=r21