Mailing List Archive

# HG changeset patch
# User Isaku Yamahata <yamahata@valinux.co.jp>
# Date 1219658677 -32400
# Node ID 0ac39e4bf63a72175a47eaf063ff85197e20f2af
# Parent efee1e0f2e087cc9940c533f402b2dd93936e048
[IA64] fix mca hander.

When reloading dtr[], itr[], overlapping must be avoided.
Add overlap check.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
---
xen/arch/ia64/linux-xen/mca_asm.S | 54 +++++++++++++++++++++++++++-----------
1 files changed, 39 insertions(+), 15 deletions(-)

diff -r efee1e0f2e08 -r 0ac39e4bf63a xen/arch/ia64/linux-xen/mca_asm.S
--- a/xen/arch/ia64/linux-xen/mca_asm.S Mon Aug 25 19:04:37 2008 +0900
+++ b/xen/arch/ia64/linux-xen/mca_asm.S Mon Aug 25 19:04:37 2008 +0900
@@ -540,6 +540,17 @@ ia64_reload_tr:
;;
dep r17=0,r17,0,IA64_GRANULE_SHIFT
;;
+
+ // avoid overlapping with stack
+ GET_THIS_PADDR(r2, cpu_kr);;
+ add r2=IA64_KR_CURRENT_STACK_OFFSET,r2
+ ;;
+ ld8 r19=[r2]
+ ;;
+ shl r19=r19,IA64_GRANULE_SHIFT
+ ;;
+ cmp.eq p0,p7=r17,r19
+
movl r20=PAGE_KERNEL
;;
or r17=r20,r17 // construct PA | page properties
@@ -552,7 +563,7 @@ ia64_reload_tr:
;;
itr.i itr[r16]=r17
;;
- itr.d dtr[r18]=r17
+(p7) itr.d dtr[r18]=r17
;;
srlz.i
;;
@@ -567,24 +578,37 @@ ia64_reload_tr:
cmp.eq p7,p0=r2,r0
;;
(p7) br.cond.sptk .overlap_vhpt // vhpt isn't mapped.
-
- // avoid overlapping with stack TR
+
dep r16=0,r2,0,IA64_GRANULE_SHIFT
;;
- GET_THIS_PADDR(r2,cpu_kr);;
- add r2=IA64_KR_CURRENT_OFFSET,r2
- ;;
- ld8 r2=[r2]
- ;;
- dep r17=0,r2,0,IA64_GRANULE_SHIFT
- ;;
- cmp.eq p7,p0=r16,r17
-(p7) br.cond.sptk .overlap_vhpt
- movl r20=PAGE_KERNEL
- ;;
- mov r18=IA64_TR_VHPT
dep r17=0,r16,60,4 // physical address of
// va_vhpt & ~(IA64_GRANULE_SIZE - 1)
+
+ // avoid overlapping with stack TR
+ GET_THIS_PADDR(r2,cpu_kr);;
+ add r2=IA64_KR_CURRENT_STACK_OFFSET,r2
+ ;;
+ ld8 r2=[r2]
+ ;;
+ shl r18=r2,IA64_GRANULE_SHIFT
+ ;;
+ cmp.eq p7,p0=r17,r18
+(p7) br.cond.sptk .overlap_vhpt
+
+ // avoid overlapping with VPD
+ GET_THIS_PADDR(r2, inserted_vpd);;
+ ld8 r18=[r2]
+ ;;
+ dep r18=0,r18,60,4
+ ;;
+ dep r18=0,r18,0,IA64_GRANULE_SHIFT
+ ;;
+ cmp.eq p7,p0=r17,r18
+(p7) br.cond.sptk .overlap_vhpt
+
+ movl r20=PAGE_KERNEL
+ ;;
+ mov r18=IA64_TR_VHPT
mov r19=IA64_GRANULE_SHIFT<<2
;;
or r17=r17,r20 // construct PA | page properties

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