Re: [Xen-devel] [PATCH v2 5/5] xen: use libxendevicemodel when available

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Fri, 3 Mar 2017, Paul Durrant wrote:
> > -----Original Message-----
> > From: Stefano Stabellini [mailto:sstabellini@xxxxxxxxxx]
> > Sent: 02 March 2017 22:50
> > To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
> > Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx; qemu-devel@xxxxxxxxxx; Stefano
> > Stabellini <sstabellini@xxxxxxxxxx>; Anthony Perard
> > <anthony.perard@xxxxxxxxxx>
> > Subject: Re: [PATCH v2 5/5] xen: use libxendevicemodel when available
> > 
> > On Thu, 2 Mar 2017, Paul Durrant wrote:
> > > This patch modifies the wrapper functions in xen_common.h to use the
> > > new xendevicemodel interface if it is available along with compatibility
> > > code to use the old libxenctrl interface if it is not.
> > >
> > > Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> > > ---
> > > Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> > > Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>
> > >
> > > v2:
> > > - Add a compat define for xenforeignmemory_close() since this is now
> > >   used.
> > > ---
> > >  include/hw/xen/xen_common.h | 115
> > +++++++++++++++++++++++++++++++-------------
> > >  xen-common.c                |   8 +++
> > >  2 files changed, 90 insertions(+), 33 deletions(-)
> > >
> > > diff --git a/include/hw/xen/xen_common.h
> > b/include/hw/xen/xen_common.h
> > > index 31cf25f..48444e5 100644
> > > --- a/include/hw/xen/xen_common.h
> > > +++ b/include/hw/xen/xen_common.h
> > > @@ -9,6 +9,7 @@
> > >  #undef XC_WANT_COMPAT_EVTCHN_API
> > >  #undef XC_WANT_COMPAT_GNTTAB_API
> > >  #undef XC_WANT_COMPAT_MAP_FOREIGN_API
> > > +#undef XC_WANT_COMPAT_DEVICEMODEL_API
> > >
> > >  #include <xenctrl.h>
> > >  #include <xenstore.h>
> > > @@ -26,48 +27,95 @@ extern xc_interface *xen_xc;
> > >   * We don't support Xen prior to 4.2.0.
> > >   */
> > >
> > > +#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 490
> > > +
> > > +typedef xc_interface xendevicemodel_handle;
> > > +
> > > +#define xendevicemodel_open(l, f) xen_xc
> > > +
> > > +#define xendevicemodel_map_io_range_to_ioreq_server \
> > > +    xc_hvm_map_io_range_to_ioreq_server
> > > +#define xendevicemodel_unmap_io_range_from_ioreq_server \
> > > +    xc_hvm_unmap_io_range_from_ioreq_server
> > > +#define xendevicemodel_map_pcidev_to_ioreq_server \
> > > +    xc_hvm_map_pcidev_to_ioreq_server
> > > +#define xendevicemodel_unmap_pcidev_from_ioreq_server \
> > > +    xc_hvm_unmap_pcidev_from_ioreq_server
> > > +#define xendevicemodel_create_ioreq_server \
> > > +    xc_hvm_create_ioreq_server
> > > +#define xendevicemodel_destroy_ioreq_server \
> > > +    xc_hvm_destroy_ioreq_server
> > > +#define xendevicemodel_get_ioreq_server_info \
> > > +    xc_hvm_get_ioreq_server_info
> > > +#define xendevicemodel_set_ioreq_server_state \
> > > +    xc_hvm_set_ioreq_server_state
> > > +#define xendevicemodel_set_pci_intx_level \
> > > +    xc_hvm_set_pci_intx_level
> > > +#define xendevicemodel_set_pci_link_route \
> > > +    xc_hvm_set_pci_link_route
> > > +#define xendevicemodel_set_isa_irq_level \
> > > +    xc_hvm_set_isa_irq_level
> > > +#define xendevicemodel_inject_msi \
> > > +    xc_hvm_inject_msi
> > > +#define xendevicemodel_set_mem_type \
> > > +    xc_hvm_set_mem_type
> > > +#define xendevicemodel_track_dirty_vram \
> > > +    xc_hvm_track_dirty_vram
> > > +#define xendevicemodel_modified_memory \
> > > +    xc_hvm_modified_memory
> > 
> > It does build correctly now for Xen < 4.9, however it breaks against
> > xen-unstable:
> > 
> >   ERROR: configure test passed without -Werror but failed with -Werror.
> >          This is probably a bug in the configure script. The failing command
> >          will be at the bottom of config.log.
> >          You can run configure with --disable-werror to bypass this check.
> > 
> > and config.log says:
> > 
> >   config-temp/qemu-conf.c: In function 'main':
> >   config-temp/qemu-conf.c:32:3: error: implicit declaration of function
> > 'xc_hvm_set_mem_type' [-Werror=implicit-function-declaration]
> >   config-temp/qemu-conf.c:32:3: error: nested extern declaration of
> > 'xc_hvm_set_mem_type' [-Werror=nested-externs]
> >   config-temp/qemu-conf.c:34:3: error: implicit declaration of function
> > 'xc_hvm_inject_msi' [-Werror=implicit-function-declaration]
> >   config-temp/qemu-conf.c:34:3: error: nested extern declaration of
> > 'xc_hvm_inject_msi' [-Werror=nested-externs]
> >   config-temp/qemu-conf.c:35:3: error: implicit declaration of function
> > 'xc_hvm_create_ioreq_server' [-Werror=implicit-function-declaration]
> >   config-temp/qemu-conf.c:35:3: error: nested extern declaration of
> > 'xc_hvm_create_ioreq_server' [-Werror=nested-externs]
> > 
> > 
> > With -DXC_WANT_COMPAT_DEVICEMODEL_API=1:
> > 
> >   In file included from /local/qemu-
> > upstream/include/hw/xen/xen_backend.h:4:0,
> >                    from hw/block/xen_disk.c:27:
> >   /local/qemu-upstream/include/hw/xen/xen_common.h: In function
> > 'xen_set_mem_type':
> >   /local/qemu-upstream/include/hw/xen/xen_common.h:78:5: error: implicit
> > declaration of function 'xc_hvm_set_mem_type' [-Werror=implicit-function-
> > declaration]
> > 
> 
> Ah... Do you have Anthony's patch?
> 
> http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=9970e98ace48574701f7e2286fb67090481a3fec
> 
> I suspect that may be the problem you're seeing above.

Yes, I do have it. I am still having build troubles with v5 too. I am
attaching my build test script: feel free to use it to test the build of
a single QEMU branch against multiple Xen versions. It requires one Xen
repository checked out and built for each Xen version. I have just
added the Xen 4.9 tests, so they might be wrong somehow, but the others
are known to work.

Attachment: test_qemu_all.sh
Description: Bourne shell script

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel