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>
---
Tue, 04 Dec 2007 22:19:26 +0900
* Remove duplicate comment
Thu, 06 Dec 2007 16:09:14 +0900
* rr index should be bitshifted 61 bits to the left
Thu, 24 Jan 2008 16:02:33 +0900
* Check rr7 not rr6, as the rr changes don't really take
full affect until rr7 is switched - and checking on rr6 doesn't work
in alt_dtlb_miss
Index: xen-unstable.hg/xen/arch/ia64/xen/ivt.S
===================================================================
--- xen-unstable.hg.orig/xen/arch/ia64/xen/ivt.S 2008-02-05
16:18:54.000000000 +0900
+++ xen-unstable.hg/xen/arch/ia64/xen/ivt.S 2008-02-05 16:18:54.000000000
+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_RID) ||
+ // r22 == 0x1e )
+ // Note that rr7 == XEN_EFI_RID implies rr6 == XEN_EFI_RID
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_RID
+ 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_RID
+ ;;
+ 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
--
--
Horms
_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel
|
Home