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| author | Keith Owens <kaos@sgi.com> | 2006-04-07 16:34:34 +1000 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2006-04-07 23:01:32 -0700 |
| commit | 8cab7ccccbdd9fe3cf6b3400d5a88ecb683a5b1b (patch) | |
| tree | 7d847ecf60940f7dae3e12240fc48184e68b87b8 /arch/ia64/kernel | |
| parent | 958b166c00b39ff0b28ad2bbb32624b9f305a4e1 (diff) | |
| download | op-kernel-dev-8cab7ccccbdd9fe3cf6b3400d5a88ecb683a5b1b.zip op-kernel-dev-8cab7ccccbdd9fe3cf6b3400d5a88ecb683a5b1b.tar.gz | |
[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')
| -rw-r--r-- | arch/ia64/kernel/mca_asm.S | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S index 60a464b..6dff024 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 |
