motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-09 10:34:58 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

hw/xen: Add backend implementation of interdomain event channel support

Browse source 
The provides the QEMU side of interdomain event channels, allowing events
to be sent to/from the guest.

The API mirrors libxenevtchn, and in time both this and the real Xen one
will be available through ops structures so that the PV backend drivers
can use the correct one as appropriate.

For now, this implementation can be used directly by our XenStore which
will be for emulated mode only.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2022-12-27 21:20:07 +00:00
parent c6623cc3e7
commit 794fba23a5
2 changed files with 352 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

19
hw/i386/kvm/xen_evtchn.h
View file

@ -14,6 +14,8 @@
#include "hw/sysbus.h"
typedef uint32_t evtchn_port_t;
void xen_evtchn_create(void);
int xen_evtchn_soft_reset(void);
int xen_evtchn_set_callback_param(uint64_t param);
@ -22,6 +24,23 @@ void xen_evtchn_set_callback_level(int level);
int xen_evtchn_set_port(uint16_t port);
/*
* These functions mirror the libxenevtchn library API, providing the QEMU
* backend side of "interdomain" event channels.
*/
struct xenevtchn_handle;
struct xenevtchn_handle *xen_be_evtchn_open(void);
int xen_be_evtchn_bind_interdomain(struct xenevtchn_handle *xc, uint32_t domid,
evtchn_port_t guest_port);
int xen_be_evtchn_unbind(struct xenevtchn_handle *xc, evtchn_port_t port);
int xen_be_evtchn_close(struct xenevtchn_handle *xc);
int xen_be_evtchn_fd(struct xenevtchn_handle *xc);
int xen_be_evtchn_notify(struct xenevtchn_handle *xc, evtchn_port_t port);
int xen_be_evtchn_unmask(struct xenevtchn_handle *xc, evtchn_port_t port);
int xen_be_evtchn_pending(struct xenevtchn_handle *xc);
/* Apart from this which is a local addition */
int xen_be_evtchn_get_guest_port(struct xenevtchn_handle *xc);
struct evtchn_status;
struct evtchn_close;
struct evtchn_unmask;