From: awilliam@xenbuild2.aw <awilliam@xenbuild2.aw>
Date: Sun, 4 Feb 2007 18:28:54 +0000 (-0700)
Subject: [IA64] Bug fix new_tlbflush_clock_period()
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~15364
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=9aee93077301b348e869b8c0410e47f5f09d15ab;p=xen.git

[IA64] Bug fix new_tlbflush_clock_period()

__vhpt_flush() might be called from new_tlbflush_clock_period()
even if the vcpu doesn't have the per-vcpu-vhpt.
It erases 64KB memory content that starts from machine address 0.

Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.com>
---

diff --git a/xen/arch/ia64/xen/flushtlb.c b/xen/arch/ia64/xen/flushtlb.c
index 0c77c1b6df..c7008db3ff 100644
--- a/xen/arch/ia64/xen/flushtlb.c
+++ b/xen/arch/ia64/xen/flushtlb.c
@@ -88,6 +88,8 @@ new_tlbflush_clock_period(void)
     smp_mb();
     for_each_domain(d) {
         for_each_vcpu(d, v) {
+            if (!test_bit(_VCPUF_initialised, &v->vcpu_flags) || VMX_DOMAIN(v))
+                continue;
             if (HAS_PERVCPU_VHPT(v->domain))
                 vcpu_vhpt_flush(v);
         }