From: Glauber de Oliveira Costa <gcosta@redhat.com>
To: xen-devel@lists.xensource.com, Keir.Fraser@cl.cam.ac.uk
Subject: [PATCH] Fix HV to properly copy runstate info
Date: Fri, 20 Oct 2006 16:23:08 -0300 [thread overview]
Message-ID: <20061020192308.GA8453@redhat.com> (raw)
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Keir,
I guess this patch does the right thing regarding the copy of the
runstate_memory_area without breaking the ABI.
Thanks,
--
Glauber de Oliveira Costa
Red Hat Inc.
"Free as in Freedom"
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--- xen-unstable/xen/arch/x86/domain.c.old 2006-10-04 01:39:48.000000000 -0300
+++ xen-unstable/xen/arch/x86/domain.c 2006-10-20 15:08:46.000000000 -0300
@@ -376,6 +376,7 @@ arch_do_vcpu_op(
case VCPUOP_register_runstate_memory_area:
{
struct vcpu_register_runstate_memory_area area;
+ struct vcpu_runstate_info runstate;
rc = -EFAULT;
if ( copy_from_guest(&area, arg, 1) )
@@ -387,9 +388,9 @@ arch_do_vcpu_op(
rc = 0;
v->runstate_guest = area.addr.v;
- if ( v == current )
- __copy_to_user(v->runstate_guest, &v->runstate,
- sizeof(v->runstate));
+ vcpu_runstate_get(v,&runstate);
+ __copy_to_user(v->runstate_guest, &runstate,
+ sizeof(runstate));
break;
}
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