From: Wei Liu <wei.liu2@citrix.com>
Date: Fri, 17 Aug 2018 15:12:32 +0000 (+0100)
Subject: x86/pt: add HVM check to XEN_DOMCTL_unbind_pt_irq
X-Git-Tag: archive/raspbian/4.14.0+80-gd101b417b7-1+rpi1^2~63^2~3427
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=a3562d8c369fed726e7d2ba105f1185878873adb;p=xen.git

x86/pt: add HVM check to XEN_DOMCTL_unbind_pt_irq

Its counterpart is HVM only. Add the check to help dead code
elimination to figure out the call to pt_irq_destroy_bind is not
needed when HVM is not enabled.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index 1002659de0..ab854899a5 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -715,6 +715,10 @@ long arch_do_domctl(
         struct xen_domctl_bind_pt_irq *bind = &domctl->u.bind_pt_irq;
         int irq = domain_pirq_to_irq(d, bind->machine_irq);
 
+        ret = -EINVAL;
+        if ( !is_hvm_domain(d) )
+            break;
+
         ret = -EPERM;
         if ( irq <= 0 || !irq_access_permitted(currd, irq) )
             break;