[PATCH v10 2/5] xen: change VIRQ_CONSOLE to VIRQ_DOMAIN to allow non-hwdom binding

[Stefano Stabellini <stefano.stabellini@xxxxxxx>]

Today only hwdom can bind VIRQ_CONSOLE. This patch changes the virq from
global to VIRQ_DOMAIN to allow other domains to bind to it.

Note that Linux silently falls back to polling when binding fails, which
masks the issue.

Signed-off-by: Jason Andryuk <jason.andryuk@xxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
---
Changes in v10:
- update comment in xen/include/public/xen.h
---
 xen/common/event_channel.c | 1 +
 xen/drivers/char/console.c | 2 +-
 xen/include/public/xen.h   | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/xen/common/event_channel.c b/xen/common/event_channel.c
index a3d18bc464..f9becb4ca5 100644
--- a/xen/common/event_channel.c
+++ b/xen/common/event_channel.c
@@ -138,6 +138,7 @@ static enum virq_type get_virq_type(unsigned int virq)
         return VIRQ_VCPU;
 
     case VIRQ_ARGO:
+    case VIRQ_CONSOLE:
         return VIRQ_DOMAIN;
 
     case VIRQ_ARCH_0 ... VIRQ_ARCH_7:
diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c
index 35f541ca8e..fbc89ca2a4 100644
--- a/xen/drivers/char/console.c
+++ b/xen/drivers/char/console.c
@@ -613,7 +613,7 @@ static void __serial_rx(char c)
          * Always notify the hardware domain: prevents receive path from
          * getting stuck.
          */
-        send_global_virq(VIRQ_CONSOLE);
+        send_guest_domain_virq(d, VIRQ_CONSOLE);
     }
 #ifdef CONFIG_SBSA_VUART_CONSOLE
     else
diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
index b12fd10e63..b8146bd00a 100644
--- a/xen/include/public/xen.h
+++ b/xen/include/public/xen.h
@@ -176,7 +176,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
 /* ` enum virq { */
 #define VIRQ_TIMER      0  /* V. Timebase update, and/or requested timeout.  */
 #define VIRQ_DEBUG      1  /* V. Request guest to dump debug info.           */
-#define VIRQ_CONSOLE    2  /* G. Bytes received on emergency console.        */
+#define VIRQ_CONSOLE    2  /* D. Bytes received on Xen console.              */
 #define VIRQ_DOM_EXC    3  /* G. Exceptional event for some domain.          */
 #define VIRQ_TBUF       4  /* G. Trace buffer has records available.         */
 #define VIRQ_DEBUGGER   6  /* G. A domain has paused for debugging.          */
-- 
2.25.1