From: Alex Williamson <alex.williamson@hp.com>
Date: Sun, 30 Dec 2007 19:56:16 +0000 (-0700)
Subject: [IA64] Fix PV break fault handler.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14445^2~75
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=3be10ebb0105449915b29d3fa393cc5b07b1b7ca;p=xen.git

[IA64] Fix PV break fault handler.

PV domain break fault handler calls C routine reflect_event() with psr.ic = 0.
It might cause unrecoverable tlb miss. set psr.ic=1 before calling it.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
---

diff --git a/xen/arch/ia64/xen/ivt.S b/xen/arch/ia64/xen/ivt.S
index f0f8c5f62c..b9eb05e50c 100644
--- a/xen/arch/ia64/xen/ivt.S
+++ b/xen/arch/ia64/xen/ivt.S
@@ -714,15 +714,20 @@ fast_hypercall:
 	adds r2=PT(CR_IFS)+16,r12
 	;;
 	st8 [r2]=r20
-	;;   
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i
+	;;
 	br.call.sptk.many b0=reflect_event
 	;;
+	rsm psr.i|psr.ic
 	adds r2=PT(R14)+16,r12
 	adds r3=PT(R8)+16,r12
 	;;
 	//r16 contains ar.bsp before cover
 	ld8 r16=[r2]
 	ld8 r8=[r3]
+	srlz.i
 	;;
 	br.sptk.many ia64_ret_from_syscall
 	;;