From: Mukesh Rathor <mukesh.rathor@oracle.com>
Date: Mon, 24 Mar 2014 08:47:59 +0000 (+0100)
Subject: x86/pvh: disallow PHYSDEVOP_pirq_eoi_gmfn_v2/v1
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~5353
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=a7ca5c402e8cf61c5e8dd6e6797a627863f5a243;p=xen.git

x86/pvh: disallow PHYSDEVOP_pirq_eoi_gmfn_v2/v1

A call to do_physdev_op with PHYSDEVOP_pirq_eoi_gmfn_v2/v1 will corrupt
struct hvm_domain when it writes to domain->arch.pv_domain.pirq_eoi_map.
Disallow that. Currently, such a path exists for linux dom0 pvh.

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
---

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 9dd56f7fc8..08ab9cba37 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -3427,6 +3427,12 @@ static long hvm_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
     case PHYSDEVOP_irq_status_query:
     case PHYSDEVOP_get_free_pirq:
         return do_physdev_op(cmd, arg);
+
+    /* pvh fixme: coming soon */
+    case PHYSDEVOP_pirq_eoi_gmfn_v1:
+    case PHYSDEVOP_pirq_eoi_gmfn_v2:
+        return -ENOSYS;
+
     }
 }