# HG changeset patch
# User Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
# Date 1216696502 -32400
# Node ID 59d4d71420d10d3dfa9fd84668a0236a689f1482
# Parent 91332bc4abd42eac452c1735e75683b1f9b1dc4e
[IA64] kexec: Add identity mapping of EFI memory to alt_dtlb_miss
Cc: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Cc: Tristan Gingold <tgingold@xxxxxxx>
Cc: Alex Williamson <alex.williamson@xxxxxx>
Cc: Aron Griffis <aron@xxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
xen/arch/ia64/xen/ivt.S | 28 ++++++++++++++++++++++++----
1 files changed, 24 insertions(+), 4 deletions(-)
diff -r 91332bc4abd4 -r 59d4d71420d1 xen/arch/ia64/xen/ivt.S
--- a/xen/arch/ia64/xen/ivt.S Tue Jul 22 12:15:02 2008 +0900
+++ b/xen/arch/ia64/xen/ivt.S Tue Jul 22 12:15:02 2008 +0900
@@ -207,17 +207,37 @@ late_alt_dtlb_miss:
(p8) br.cond.sptk frametable_miss ;;
#endif
// If it is not a Xen address, handle it via page_fault.
+ // !( ((r22 == 0x18 || r22 == 0x1c) && rr7 == XEN_EFI_RR) ||
+ // r22 == 0x1e )
+ // Note that rr7 == XEN_EFI_RR implies rr6 == XEN_EFI_RR
extr.u r22=r16,59,5
;;
dep r20=0,r20,IA64_ITIR_KEY,IA64_ITIR_KEY_LEN // clear the key
- cmp.ne p8,p0=0x1e,r22
-(p8) br.cond.sptk page_fault
- ;;
+ movl r23=7 << 61
+ ;;
+ mov r23=rr[r23]
+ ;;
+ mov r25=XEN_EFI_RR
+ cmp.eq p8,p0=0x18,r22 // 0xc...
+ ;;
+ cmp.eq.or p8,p0=0x1c,r22 // 0xe...
+ ;;
+ cmp.eq.and p8,p0=r25,r23 // rr7 == XEN_EFI_RR
+ ;;
+ cmp.eq.or p8,p0=0x1e,r22 // 0xf...
+(p8) br.cond.spnt alt_dtlb_miss_identity_map
+ br.cond.spnt page_fault
+ ;;
+alt_dtlb_miss_identity_map:
dep r21=-1,r21,IA64_PSR_ED_BIT,1
or r19=r19,r17 // insert PTE control bits into r19
mov cr.itir=r20 // set itir with cleared key
;;
- dep r19=r18,r19,4,1 // set bit 4 (uncached) if access to UC area
+ cmp.ne p8,p0=r0,r18 // Xen UC bit set
+ ;;
+ cmp.eq.or p8,p0=0x18,r22 // Region 6 is UC for EFI
+ ;;
+(p8) dep r19=-1,r19,4,1 // set bit 4 (uncached) if access to UC area
(p6) mov cr.ipsr=r21
;;
(p7) itc.d r19 // insert the TLB entry
_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog
|
Home