[Xen-devel] [PATCH v2] pvh: disallow PHYSDEVOP_pirq_eoi_gmfn_v2/v1

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

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@xxxxxxxxxx>
---
 xen/arch/x86/physdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/xen/arch/x86/physdev.c b/xen/arch/x86/physdev.c
index bc0634c..30af0ab 100644
--- a/xen/arch/x86/physdev.c
+++ b/xen/arch/x86/physdev.c
@@ -343,6 +343,11 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) 
arg)
         if ( copy_from_guest(&info, arg, 1) != 0 )
             break;
 
+        /* pvh fixme: add pirq eoi support */
+        ret = -ENOSYS;
+        if ( is_pvh_vcpu(current) )
+            break;
+
         ret = -EINVAL;
         page = get_page_from_gfn(current->domain, info.gmfn, NULL, P2M_ALLOC);
         if ( !page )
-- 
1.8.3.1


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