[Xen-changelog] [xen staging] x86/pvh: allow PVH Dom0 to use the debug IO port console

[patchbot@xxxxxxx]

commit ce47462cb4d049971aedec51c1105673be41adce
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Wed Oct 31 17:59:26 2018 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Oct 31 17:59:26 2018 +0100

    x86/pvh: allow PVH Dom0 to use the debug IO port console
    
    Force trapping accesses to IO port 0xe9 for a PVH Dom0, so it can
    print to the HVM debug console.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/dom0_build.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c
index fe73cef899..038e37132a 100644
--- a/xen/arch/x86/dom0_build.c
+++ b/xen/arch/x86/dom0_build.c
@@ -433,6 +433,12 @@ int __init dom0_setup_permissions(struct domain *d)
         rc |= ioports_deny_access(d, pmtmr_ioport, pmtmr_ioport + 3);
     /* PCI configuration space (NB. 0xcf8 has special treatment). */
     rc |= ioports_deny_access(d, 0xcfc, 0xcff);
+#ifdef CONFIG_HVM
+    if ( is_hvm_domain(d) )
+        /* HVM debug console IO port. */
+        rc |= ioports_deny_access(d, XEN_HVM_DEBUGCONS_IOPORT,
+                                  XEN_HVM_DEBUGCONS_IOPORT);
+#endif
     /* Command-line I/O ranges. */
     process_dom0_ioports_disable(d);
 
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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