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[Xen-ia64-devel] [PATCH] fix initial value of cr.pta
| To: | xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-ia64-devel] [PATCH] fix initial value of cr.pta |
| From: | Kouya SHIMURA <kouya@xxxxxxxxxxxxxx> |
| Date: | Thu, 5 Apr 2007 18:07:21 +0900 |
| Delivery-date: | Thu, 05 Apr 2007 02:06:19 -0700 |
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The initial value of cr.pta in a vcpu is zero. So a Reserved
Register/Field fault is raised if a guest executes the following
sequence.
mov r2=cr.pta;;
...
mov cr.pta=r2
Actually, the windows installer with vcpus>=3 crashes due to this
issue.
-- Kouya
Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>
diff -r f378c424e0ce xen/arch/ia64/xen/vcpu.c
--- a/xen/arch/ia64/xen/vcpu.c Tue Apr 03 13:04:51 2007 -0600
+++ b/xen/arch/ia64/xen/vcpu.c Thu Apr 05 17:30:50 2007 +0900
@@ -174,6 +174,8 @@ void vcpu_init_regs(struct vcpu *v)
INT_ENABLE_OFFSET(v);
VCPU(v, itv) = (1 << 16); /* timer vector masked */
}
+
+ VCPU(v, pta) = 15<<2; /* pta.size mustn't be 0. the minimum is 15 */
v->arch.domain_itm_last = -1L;
}
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