[Xen-ia64-devel] [patch 12/16] Kexec: Set protection key of identity mapping of EFI in alt_dtlb_miss

[Simon Horman <horms@xxxxxxxxxxxx>]

This will also set the protection key for identity mapped EFI memory
handled by dtlb_miss, as it branches to alt_dtlb_miss.

Without this HP rx3600 machines will not boot

Cc: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Cc: Tristan Gingold <tgingold@xxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>

--- 
Thu, 06 Dec 2007 16:11:35 +0900
* Fix up bogus hex values in comments

Index: xen-unstable.hg/xen/arch/ia64/xen/ivt.S
===================================================================
--- xen-unstable.hg.orig/xen/arch/ia64/xen/ivt.S        2008-02-05 
16:18:55.000000000 +0900
+++ xen-unstable.hg/xen/arch/ia64/xen/ivt.S     2008-02-05 16:18:56.000000000 
+0900
@@ -217,8 +217,15 @@ ENTRY(alt_dtlb_miss)
        ;;
 late_alt_dtlb_miss:
        mov r20=cr.isr
+       extr.u r22=r16,59,5
+       ;;
+       cmp.eq p6,p0=0x18,r22   // address == 0xc...
+       cmp.eq p7,p0=0x1c,r22   // address == 0xe...
        movl r17=PAGE_KERNEL
        mov r21=cr.ipsr
+       ;;
+(p6)   movl r17=(__DIRTY_BITS | _PAGE_AR_RWX | _PAGE_PL_PRIV | _PAGE_MA_UC)
+(p7)   movl r17=(__DIRTY_BITS | _PAGE_AR_RWX)
        movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
        ;;
        extr.u r23=r21,IA64_PSR_CPL0_BIT,2      // extract psr.cpl

-- 

-- 
Horms


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