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Re: [PATCH v2 5/9] tools/libxenevtchn: add xenevtchn_bind() under Mini-OS
- To: Anthony PERARD <anthony@xxxxxxxxxxxxxx>
- From: Jürgen Groß <jgross@xxxxxxxx>
- Date: Wed, 30 Jul 2025 08:03:49 +0200
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Jason Andryuk <jason.andryuk@xxxxxxx>
- Delivery-date: Wed, 30 Jul 2025 06:03:59 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 29.07.25 19:00, Anthony PERARD wrote:
On Tue, Jul 29, 2025 at 01:01:41PM +0200, Juergen Gross wrote:
In order to reactivate an event channel after kexec() of Mini-OS,
libxenevtchn needs to allocate the port data for the event channel
and set the handler again. Add a new interface xenevtchn_bind()
for that purpose, available under Mini-OS only.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
---
tools/include/xenevtchn.h | 11 +++++++++++
tools/libs/evtchn/minios.c | 17 +++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/tools/include/xenevtchn.h b/tools/include/xenevtchn.h
index 1255c85178..113a718d67 100644
--- a/tools/include/xenevtchn.h
+++ b/tools/include/xenevtchn.h
@@ -173,6 +173,17 @@ int xenevtchn_unmask(xenevtchn_handle *xce, evtchn_port_t
port);
*/
int xenevtchn_restrict(xenevtchn_handle *xce, domid_t domid);
+/**
+ * Bind an event channel under Mini-OS.
+ *
+ * Bind an event channel specified by its known port after a kexec() of
+ * Mini-OS. This function is available under Mini-OS only!
Would guarding this prototype within "#ifdef __MINIOS__" be useful to
prevent it from been used? That would give an error earlier when
compiling, rather than later when linking a binary.
Yes, I can add that.
In anycase: Acked-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Thanks,
Juergen
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