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path: root/include/hw/xen/xen_backend.h
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2016-11-22xen: create qdev for each backend deviceJuergen Gross
Create a qdev plugged to the xen-sysbus for each new backend device. This device can be used as a parent for all needed devices of that backend. The id of the new device will be "xen-<type>-<dev>" with <type> being the xen backend type (e.g. "qdisk") and <dev> the xen backend number of the type under which it is to be found in xenstore. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
2016-11-22xen: add an own bus for xen backend devicesJuergen Gross
Add a bus for Xen backend devices in order to be able to establish a dedicated device path for pluggable devices. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
2016-10-28xen: Prepare xendev qtail to be shared with frontendsEmil Condrea
* move xendevs qtail to xen_pvdev.c * change xen_be_get_xendev to use a new function: xen_pv_insert_xendev Signed-off-by: Emil Condrea <emilcondrea@gmail.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Quan Xu <xuquan8@huawei.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com>
2016-10-28xen: Move evtchn functions to xen_pvdev.cEmil Condrea
The name of the functions moved: * xen_be_evtchn_event * xen_be_unbind_evtchn * xen_be_send_notify Signed-off-by: Emil Condrea <emilcondrea@gmail.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Quan Xu <xuquan8@huawei.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com>
2016-10-28xen: Move xenstore_update to xen_pvdev.cEmil Condrea
* xenstore_update -> xen_pvdev.c Signed-off-by: Emil Condrea <emilcondrea@gmail.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Quan Xu <xuquan8@huawei.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com>
2016-10-28xen: Create a new file xen_pvdev.cEmil Condrea
The purpose of the new file is to store generic functions shared by frontend and backends such as xenstore operations, xendevs. Signed-off-by: Quan Xu <quan.xu@intel.com> Signed-off-by: Emil Condrea <emilcondrea@gmail.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Quan Xu <xuquan8@huawei.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com>
2016-10-28xen: Fix coding style warningsEmil Condrea
Fixes: * WARNING: line over 80 characters Signed-off-by: Emil Condrea <emilcondrea@gmail.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Quan Xu <xuquan8@huawei.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com>
2016-08-03xen: use a common function for pv and hvm guest backend register callsJuergen Gross
Instead of calling xen_be_register() for each supported backend type for hvm and pv guests in their machine init functions use a common function in order not to have to add new backends twice. This at once fixes the error that hvm domains couldn't use the qusb backend. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Message-id: 1470119552-16170-1-git-send-email-jgross@suse.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2016-07-12Clean up decorations and whitespace around header guardsMarkus Armbruster
Cleaned up with scripts/clean-header-guards.pl. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2016-05-23xen: add pvUSB backendJuergen Gross
Add a backend for para-virtualized USB devices for xen domains. The backend is using host-libusb to forward USB requests from a domain via libusb to the real device(s) passed through. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Message-id: 1463062421-613-4-git-send-email-jgross@suse.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2016-05-23xen: write information about supported backendsJuergen Gross
Add a Xenstore directory for each supported pv backend. This will allow Xen tools to decide which backend type to use in case there are multiple possibilities. The information is added under /local/domain/<backend-domid>/device-model/<domid>/backends before the "running" state is written to Xenstore. Using a directory for each backend enables us to add parameters for specific backends in the future. This interface is documented in the Xen source repository in the file docs/misc/qemu-backends.txt In order to reuse the Xenstore directory creation already present in hw/xen/xen_devconfig.c move the related functions to hw/xen/xen_backend.c where they fit better. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Wei Liu <wei.liu2@citrix.com> Message-id: 1463062421-613-3-git-send-email-jgross@suse.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2016-05-23xen: introduce dummy system deviceJuergen Gross
Introduce a new dummy system device serving as parent for virtual buses. This will enable new pv backends to introduce virtual buses which are removable again opposed to system buses which are meant to stay once added. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Wei Liu <wei.liu2@citrix.com> Message-id: 1463062421-613-2-git-send-email-jgross@suse.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2016-02-10xen: drop XenXC and associated interface wrappersIan Campbell
Now that 4.2 and earlier are no longer supported "xc_interface *" is always the right type for the xc interface handle. With this we can also simplify the handling of the xenforeignmemory compatibility wrapper by making xenforeignmemory_handle == xc_interface, instead of an xc_interface* and remove various uses of & and *h. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2016-01-26xen: Switch uses of xc_map_foreign_{pages,bulk} to use libxenforeignmemory API.Ian Campbell
In Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity. One such library will be libxenforeignmemory which provides access to privileged foreign mappings and which will provide an interface equivalent to xc_map_foreign_{pages,bulk}. The new xenforeignmemory_map() function behaves like xc_map_foreign_pages() when the err argument is NULL and like xc_map_foreign_bulk() when err is non-NULL, which maps into the shim here onto checking err == NULL and calling the appropriate old function. Note that xenforeignmemory_map() takes the number of pages before the arrays themselves, in order to support potentially future use of variable-length-arrays in the prototype (in the future, when Xen's baseline toolchain requirements are new enough to ensure VLAs are supported). In preparation for adding support for libxenforeignmemory add support to the <=4.0 and <=4.6 compat code in xen_common.h to allow us to switch to using the new API. These shims will disappear for versions of Xen which include libxenforeignmemory. Since libxenforeignmemory will have its own handle type but for <= 4.6 the functionality is provided by using a libxenctrl handle we introduce a new global xen_fmem alongside the existing xen_xc. In fact we make xen_fmem a pointer to the existing xen_xc, which then works correctly with both <=4.0 (xc handle is an int) and <=4.6 (xc handle is a pointer). In the latter case xen_fmem is actually a double indirect pointer, but it all falls out in the wash. Unlike libxenctrl libxenforeignmemory has an explicit unmap function, rather than just specifying that munmap should be used, so the unmap paths are updated to use xenforeignmemory_unmap, which is a shim for munmap on these versions of xen. The mappings in xen-hvm.c do not appear to be unmapped (which makes sense for a qemu-dm process) In fb_disconnect this results in a change from simply mmap over the existing mapping (with an implicit munmap) to expliclty unmapping with xenforeignmemory_unmap and then mapping the required anonymous memory in the same hole. I don't think this is a problem since any other thread which was racily touching this region would already be running the risk of hitting the mapping halfway through the call. If this is thought to be a problem then we could consider adding an extra API to the libxenforeignmemory interface to replace a foreign mapping with anonymous shared memory, but I'd prefer not to. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2016-01-26xen: Switch to libxengnttab interface for compat shims.Ian Campbell
In Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity. One such library will be libxengnttab which provides access to grant tables. In preparation for this switch the compatibility layer in xen_common.h (which support building with older versions of Xen) to use what will be the new library API. This means that the gnttab shim will disappear for versions of Xen which include libxengnttab. To simplify things for the <= 4.0.0 support we wrap the int fd in a malloc(sizeof int) such that the handle is always a pointer. This leads to less typedef headaches and the need for XC_HANDLER_INITIAL_VALUE etc for these interfaces. Note that this patch does not add any support for actually using libxengnttab, it just adjusts the existing shims. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2016-01-26xen: Switch to libxenevtchn interface for compat shims.Ian Campbell
In Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity. One such library will be libxenevtchn which provides access to event channels. In preparation for this switch the compatibility layer in xen_common.h (which support building with older versions of Xen) to use what will be the new library API. This means that the evtchn shim will disappear for versions of Xen which include libxenevtchn. To simplify things for the <= 4.0.0 support we wrap the int fd in a malloc(sizeof int) such that the handle is always a pointer. This leads to less typedef headaches and the need for XC_HANDLER_INITIAL_VALUE etc for these interfaces. Note that this patch does not add any support for actually using libxenevtchn, it just adjusts the existing shims. Note that xc_evtchn_alloc_unbound functionality remains in libxenctrl, since that functionality is not exposed by /dev/xen/evtchn. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2014-07-07xen_backend: introduce xenstore_read_uint64 and xenstore_read_fe_uint64Stefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2013-04-08hw: move headers to include/Paolo Bonzini
Many of these should be cleaned up with proper qdev-/QOM-ification. Right now there are many catch-all headers in include/hw/ARCH depending on cpu.h, and this makes it necessary to compile these files per-target. However, fixing this does not belong in these patches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>