[Xen-changelog] [xen-unstable] [IA64] Fix HVM boot failure

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Alex Williamson <alex.williamson@xxxxxx>
# Date 1181142830 21600
# Node ID 2fd72ec88a9afa1af005b261d835ef8b42bbb5e8
# Parent  9daa40cae3d6548f404bcfd4300e604185db6b64
[IA64] Fix HVM boot failure

HVM sometimes fails to boot with the message
"Guest nested fault vector=0x5400!".

The cause of this issue is that cr.ifs never be initialized in very
first context switching. To optimize hypercall on HVM, cr.ifs is only
set with the predicate pNonSys(pr5)=1.

Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>
---
 xen/arch/ia64/vmx/vmx_init.c |    6 ++++++
 1 files changed, 6 insertions(+)

diff -r 9daa40cae3d6 -r 2fd72ec88a9a xen/arch/ia64/vmx/vmx_init.c
--- a/xen/arch/ia64/vmx/vmx_init.c      Wed Jun 06 09:10:52 2007 -0600
+++ b/xen/arch/ia64/vmx/vmx_init.c      Wed Jun 06 09:13:50 2007 -0600
@@ -51,6 +51,7 @@
 #include <asm/viosapic.h>
 #include <xen/event.h>
 #include <asm/vlsapic.h>
+#include "entry.h"
 
 /* Global flag to identify whether Intel vmx feature is on */
 u32 vmx_enabled = 0;
@@ -296,6 +297,7 @@ vmx_final_setup_guest(struct vcpu *v)
 {
        vpd_t *vpd;
        int rc;
+       struct switch_stack *sw;
 
        vpd = alloc_vpd();
        ASSERT(vpd);
@@ -331,6 +333,10 @@ vmx_final_setup_guest(struct vcpu *v)
        /* Set up guest 's indicator for VTi domain*/
        set_bit(ARCH_VMX_DOMAIN, &v->arch.arch_vmx.flags);
 
+       /* Initialize pNonSys=1 for the first context switching */
+       sw = (struct switch_stack *)vcpu_regs(v) - 1;
+       sw->pr = (1UL << PRED_NON_SYSCALL);
+
        return 0;
 }
 

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