[Xen-changelog] [xen staging] xen: allow console_io hypercalls from certain DomUs

[patchbot@xxxxxxx]

commit b9a4fadf94d09a4087ce655055d6091d3da8b8c9
Author:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
AuthorDate: Tue Nov 13 08:45:49 2018 -0800
Commit:     Julien Grall <julien.grall@xxxxxxx>
CommitDate: Wed Nov 14 19:24:52 2018 +0000

    xen: allow console_io hypercalls from certain DomUs
    
    Introduce an is_console option to allow certain classes of domUs to use
    the Xen console. Specifically, it will be used to give console access to
    all domUs started from Xen from information on device tree.
    
    Signed-off-by: Stefano Stabellini <stefanos@xxxxxxxxxx>
    Acked-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    CC: andrew.cooper3@xxxxxxxxxx
    CC: George.Dunlap@xxxxxxxxxxxxx
    CC: ian.jackson@xxxxxxxxxxxxx
    CC: jbeulich@xxxxxxxx
    CC: konrad.wilk@xxxxxxxxxx
    CC: tim@xxxxxxx
    CC: wei.liu2@xxxxxxxxxx
    CC: dgdegra@xxxxxxxxxxxxx
---
 xen/include/xen/sched.h | 2 ++
 xen/include/xsm/dummy.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index 3171eabfd6..7e51a39358 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -376,6 +376,8 @@ struct domain
     bool             auto_node_affinity;
     /* Is this guest fully privileged (aka dom0)? */
     bool             is_privileged;
+    /* Can this guest access the Xen console? */
+    bool             is_console;
     /* Is this a xenstore domain (not dom0)? */
     bool             is_xenstore;
     /* Domain's VCPUs are pinned 1:1 to physical CPUs? */
diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h
index ae971822d5..a29d1efe9b 100644
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -231,6 +231,8 @@ static XSM_INLINE int 
xsm_memory_stat_reservation(XSM_DEFAULT_ARG struct domain
 static XSM_INLINE int xsm_console_io(XSM_DEFAULT_ARG struct domain *d, int cmd)
 {
     XSM_ASSERT_ACTION(XSM_OTHER);
+    if ( d->is_console )
+        return xsm_default_action(XSM_HOOK, d, NULL);
 #ifdef CONFIG_VERBOSE_DEBUG
     if ( cmd == CONSOLEIO_write )
         return xsm_default_action(XSM_HOOK, d, NULL);
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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