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[RFC PATCH v1 20/25] hw/xen: Hook up emulated implementation for event c
From: |
David Woodhouse |
Subject: |
[RFC PATCH v1 20/25] hw/xen: Hook up emulated implementation for event channel operations |
Date: |
Thu, 2 Mar 2023 15:34:30 +0000 |
From: David Woodhouse <dwmw@amazon.co.uk>
We provided the backend-facing evtchn functions very early on as part of
the core Xen platform support, since things like timers and xenstore need
to use them.
By what may or may not be an astonishing coincidence, those functions
just *happen* all to have exactly the right function prototypes to slot
into the evtchn_backend_ops table and be called by the PV backends.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/kvm/xen_evtchn.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index 886fbf6b3b..98a7b85047 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -34,6 +34,7 @@
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "hw/irq.h"
+#include "hw/xen/xen_backend_ops.h"
#include "xen_evtchn.h"
#include "xen_overlay.h"
@@ -278,6 +279,17 @@ static const TypeInfo xen_evtchn_info = {
.class_init = xen_evtchn_class_init,
};
+static struct evtchn_backend_ops emu_evtchn_backend_ops = {
+ .open = xen_be_evtchn_open,
+ .bind_interdomain = xen_be_evtchn_bind_interdomain,
+ .unbind = xen_be_evtchn_unbind,
+ .close = xen_be_evtchn_close,
+ .get_fd = xen_be_evtchn_fd,
+ .notify = xen_be_evtchn_notify,
+ .unmask = xen_be_evtchn_unmask,
+ .pending = xen_be_evtchn_pending,
+};
+
static void gsi_assert_bh(void *opaque)
{
struct vcpu_info *vi = kvm_xen_get_vcpu_info_hva(0);
@@ -318,6 +330,9 @@ void xen_evtchn_create(void)
s->nr_pirq_inuse_words = DIV_ROUND_UP(s->nr_pirqs, 64);
s->pirq_inuse_bitmap = g_new0(uint64_t, s->nr_pirq_inuse_words);
s->pirq = g_new0(struct pirq_info, s->nr_pirqs);
+
+ /* Set event channel functions for backend drivers to use */
+ xen_evtchn_ops = &emu_evtchn_backend_ops;
}
void xen_evtchn_connect_gsis(qemu_irq *system_gsis)
--
2.39.0
- Re: [RFC PATCH v1 07/25] hw/xen: Implement core serialize/deserialize methods for xenstore_impl, (continued)
- Re: [RFC PATCH v1 07/25] hw/xen: Implement core serialize/deserialize methods for xenstore_impl, David Woodhouse, 2023/03/07
- Re: [RFC PATCH v1 07/25] hw/xen: Implement core serialize/deserialize methods for xenstore_impl, Paul Durrant, 2023/03/07
- Re: [RFC PATCH v1 07/25] hw/xen: Implement core serialize/deserialize methods for xenstore_impl, Paul Durrant, 2023/03/07
- Re: [RFC PATCH v1 07/25] hw/xen: Implement core serialize/deserialize methods for xenstore_impl, David Woodhouse, 2023/03/07
- Re: [RFC PATCH v1 07/25] hw/xen: Implement core serialize/deserialize methods for xenstore_impl, Paul Durrant, 2023/03/07
- Re: [RFC PATCH v1 07/25] hw/xen: Implement core serialize/deserialize methods for xenstore_impl, Paul Durrant, 2023/03/07
[RFC PATCH v1 01/25] hw/xen: Add xenstore wire implementation and implementation stubs, David Woodhouse, 2023/03/02
[RFC PATCH v1 11/25] hw/xen: Pass grant ref to gnttab unmap operation, David Woodhouse, 2023/03/02
[RFC PATCH v1 20/25] hw/xen: Hook up emulated implementation for event channel operations,
David Woodhouse <=
[RFC PATCH v1 22/25] hw/xen: Add emulated implementation of XenStore operations, David Woodhouse, 2023/03/02
[RFC PATCH v1 26/25] MAINTAINERS: Add entry for Xen on KVM emulation, David Woodhouse, 2023/03/07
[RFC PATCH v1 27/25] docs: Update Xen-on-KVM documentation for PV disk support, David Woodhouse, 2023/03/07