From: Keir Fraser <keir.fraser@citrix.com>
Date: Tue, 9 Mar 2010 12:29:10 +0000 (+0000)
Subject: x86: Disable VCPUOP_register_vcpu_time_memory_area.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~12526
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success//%22http:/www.example.com/cgi/success/?a=commitdiff_plain;h=a148f0e67dee472f185cf66b11fbc6cdc90a1804;p=xen.git

x86: Disable VCPUOP_register_vcpu_time_memory_area.

Its implementation is buggy and causes memory corruption.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index 0ead1a1985..d20487f8d9 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -970,6 +970,11 @@ arch_do_vcpu_op(
         break;
     }
 
+    /*
+     * XXX Disable for 4.0.0: __update_vcpu_system_time() writes to the given
+     * virtual address even when running in another domain's address space.
+     */
+#if 0
     case VCPUOP_register_vcpu_time_memory_area:
     {
         struct vcpu_register_time_memory_area area;
@@ -988,6 +993,7 @@ arch_do_vcpu_op(
 
         break;
     }
+#endif
 
     case VCPUOP_get_physid:
     {