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https://github.com/xen-project/xen.git
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Ian Campbell
b7f76a699d
libxenevtchn will provide a stable API and ABI for accessing the evtchn device. The functions are moved into the xenevtchn namespace to make a clean break from libxc and avoid ambiguity regarding which interfaces are stable. All in-tree users are updated to use the new names. Upon request (via #define XC_WANT_COMPAT_EVTCHN_API) libxenctrl will provide a compat API for the old names. This is used by qemu-xen for the time being. qemu-xen-traditional is updated in lockstep. This leaves a few event channel related functions which go via privcmd (EVTCHNOP) rather than ioctls on the /dev/xen/evtchn device in libxenctrl. Specifically: - xc_evtchn_alloc_unbound - xc_evtchn_reset - xc_evtchn_status Note that xc_evtchn_alloc_unbound's functionality is also provided by xenevtchn_bind_unbound_port() (née xc_evtchn_bind_unbound_port) and is probably redundant. These functions do not appear to be needed by qemu-dm, qemu-pv (provision of device model to HVM guests and PV backends respectively) or by libvchan suggesting they are not needed by non-toolstack uses of event channels. QEMU does use these in hw/xenpv/xen_domainbuild.c but that is a "toolstack use". The new library uses a version script to ensure that only expected symbols are exported and to version them such that ABI guarantees can be kept in the future. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> [ ijc -- updated MINIOS_UPSTREAM_REVISION and QEMU_TRADITIONAL_REVISION ]
76 lines
1.5 KiB
C
76 lines
1.5 KiB
C
/*
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* Compat shims for use of 3rd party consumers of libxenctrl xc_evtchn
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* functionality which has been split into separate libraries.
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*/
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#include <xenevtchn.h>
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#define XC_WANT_COMPAT_EVTCHN_API
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#include "xenctrl.h"
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xc_evtchn *xc_evtchn_open(xentoollog_logger *logger,
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unsigned open_flags)
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{
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return xenevtchn_open(logger, open_flags);
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}
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int xc_evtchn_close(xc_evtchn *xce)
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{
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return xenevtchn_close(xce);
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}
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int xc_evtchn_fd(xc_evtchn *xce)
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{
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return xenevtchn_fd(xce);
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}
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int xc_evtchn_notify(xc_evtchn *xce, evtchn_port_t port)
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{
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return xenevtchn_notify(xce, port);
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}
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evtchn_port_or_error_t
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xc_evtchn_bind_unbound_port(xc_evtchn *xce, int domid)
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{
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return xenevtchn_bind_unbound_port(xce, domid);
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}
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evtchn_port_or_error_t
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xc_evtchn_bind_interdomain(xc_evtchn *xce, int domid,
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evtchn_port_t remote_port)
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{
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return xenevtchn_bind_interdomain(xce, domid, remote_port);
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}
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evtchn_port_or_error_t
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xc_evtchn_bind_virq(xc_evtchn *xce, unsigned int virq)
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{
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return xenevtchn_bind_virq(xce, virq);
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}
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int xc_evtchn_unbind(xc_evtchn *xce, evtchn_port_t port)
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{
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return xenevtchn_unbind(xce, port);
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}
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evtchn_port_or_error_t
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xc_evtchn_pending(xc_evtchn *xce)
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{
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return xenevtchn_pending(xce);
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}
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int xc_evtchn_unmask(xc_evtchn *xce, evtchn_port_t port)
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{
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return xenevtchn_unmask(xce, port);
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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