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[PATCH v9 2/4] xen: change VIRQ_CONSOLE to VIRQ_DOMAIN to allow non-hwdom binding
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Stefano Stabellini <stefano.stabellini@xxxxxxx>
- Date: Tue, 3 Feb 2026 15:07:55 -0800
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- Cc: <grygorii_strashko@xxxxxxxx>, <anthony.perard@xxxxxxxxxx>, <michal.orzel@xxxxxxx>, <julien@xxxxxxx>, <roger.pau@xxxxxxxxxx>, <jason.andryuk@xxxxxxx>, <victorm.lira@xxxxxxx>, <andrew.cooper3@xxxxxxxxxx>, <jbeulich@xxxxxxxx>, <sstabellini@xxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxx>
- Delivery-date: Tue, 03 Feb 2026 23:08:13 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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>
---
xen/common/event_channel.c | 1 +
xen/drivers/char/console.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
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
--
2.25.1
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