[Xen-ia64-devel] [patch 07/12] ia64: 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>


Index: 20071119-ia64/xen/arch/ia64/xen/ivt.S
===================================================================
--- 20071119-ia64.orig/xen/arch/ia64/xen/ivt.S  2007-11-25 22:53:36.000000000 
-0700
+++ 20071119-ia64/xen/arch/ia64/xen/ivt.S       2007-11-25 23:16:52.000000000 
-0700
@@ -225,8 +225,13 @@
        ;;
 late_alt_dtlb_miss:
        mov r20=cr.isr
+       cmp.eq p6,p0=0x18,r22   // address == 0xe...
+       cmp.eq p7,p0=0x1c,r22   // address == 0xf...
        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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