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

diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c
index fe73cef899e4588838222dea88f11c45938ebe80..038e37132a53b7b127ae0f6b8babd8154228b03e 100644 (file)
--- 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);