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[PATCH 1/2] xen/events: Fix xen_set_upcall_vector stub
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Jane Malalane <jane.malalane@xxxxxxxxxx>
- From: Jason Andryuk <jason.andryuk@xxxxxxx>
- Date: Wed, 5 Aug 2026 21:52:30 -0400
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Jason Andryuk <jason.andryuk@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>
- Delivery-date: Thu, 06 Aug 2026 02:15:58 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Building the xen_set_upcall_vector stub fails with
error: control reaches end of non-void function.
Return -EINVAL, which matches the hypercall's return for a non-HVM
domain.
This is needed to allow disabling CONFIG_XEN_PVHVM.
Fixes: b1c3497e604d ("x86/xen: Add support for HVMOP_set_evtchn_upcall_vector")
Signed-off-by: Jason Andryuk <jason.andryuk@xxxxxxx>
---
drivers/xen/events/events_base.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 6ea945508a89..3a5ae96e73cc 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -2245,7 +2245,7 @@ static __init void xen_alloc_callback_vector(void)
#else
void xen_setup_callback_vector(void) {}
static inline void xen_init_setup_upcall_vector(void) {}
-int xen_set_upcall_vector(unsigned int cpu) {}
+int xen_set_upcall_vector(unsigned int cpu) { return -EINVAL; }
static inline void xen_alloc_callback_vector(void) {}
#endif /* CONFIG_XEN_PVHVM */
#endif /* CONFIG_X86 */
--
2.55.0
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