Re: [Qemu-devel] [PATCH V9 04/16] xen: Support new libxc calls from xen unstable.

[Anthony Liguori <anthony@codemonkey.ws>]

On 01/25/2011 08:29 AM, anthony.perard@citrix.com wrote:
> From: Anthony PERARD<anthony.perard@citrix.com>
>
> Update the libxenctrl calls in Qemu to use the new interface, otherwise
> Qemu wouldn't be able to build against new versions of the library.
>
> We also check libxenctrl version in configure, from Xen 3.3.0 to Xen
> unstable.
>
> Signed-off-by: Anthony PERARD<anthony.perard@citrix.com>
> Signed-off-by: Stefano Stabellini<stefano.stabellini@eu.citrix.com>
> ---
>   Makefile.target      |    3 +
>   configure            |   62 +++++++++++++++++++++++++++++-
>   hw/xen_backend.c     |   21 +++++-----
>   hw/xen_backend.h     |    7 ++-
>   hw/xen_common.h      |   36 ++++++++++-------
>   hw/xen_disk.c        |    4 +-
>   hw/xen_domainbuild.c |    2 +-
>   hw/xen_interfaces.c  |  103 +++++++++++++++++++++++++++++++++++++++++++++-----
>   hw/xen_interfaces.h  |   76 +++++++++++++++++++++++++------------
>   hw/xen_redirect.h    |   32 ++++++++-------
>   10 files changed, 264 insertions(+), 82 deletions(-)
>
> diff --git a/Makefile.target b/Makefile.target
> index db29e96..d09719f 100644
> --- a/Makefile.target
> +++ b/Makefile.target
> @@ -205,6 +205,9 @@ QEMU_CFLAGS += $(VNC_SASL_CFLAGS)
>   QEMU_CFLAGS += $(VNC_JPEG_CFLAGS)
>   QEMU_CFLAGS += $(VNC_PNG_CFLAGS)
>
> +# xen support
> +obj-$(CONFIG_XEN) += xen_interfaces.o
> +
>   # xen backend driver support
>   obj-$(CONFIG_XEN) += xen_backend.o xen_devconfig.o
>   obj-$(CONFIG_XEN) += xen_console.o xenfb.o xen_disk.o xen_nic.o
> diff --git a/configure b/configure
> index 5a9121d..fde9bad 100755
> --- a/configure
> +++ b/configure
> @@ -126,6 +126,7 @@ vnc_jpeg=""
>   vnc_png=""
>   vnc_thread="no"
>   xen=""
> +xen_ctrl_version=""
>   linux_aio=""
>   attr=""
>   vhost_net=""
> @@ -1144,13 +1145,71 @@ fi
>
>   if test "$xen" != "no" ; then
>     xen_libs="-lxenstore -lxenctrl -lxenguest"
> +
> +  # Xen unstable
>     cat>  $TMPC<<EOF
>   #include<xenctrl.h>
>   #include<xs.h>
> -int main(void) { xs_daemon_open(); xc_interface_open(); return 0; }
> +#include<stdint.h>
> +#include<xen/hvm/hvm_info_table.h>
> +#if !defined(HVM_MAX_VCPUS)
> +# error HVM_MAX_VCPUS not defined
> +#endif
> +int main(void) {
> +  xc_interface *xc;
> +  xs_daemon_open();
> +  xc = xc_interface_open(0, 0, 0);
> +  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
> +  xc_gnttab_open(NULL, 0);
> +  return 0;
> +}
>   EOF
>     if compile_prog "" "$xen_libs" ; then
> +    xen_ctrl_version=410
> +    xen=yes
> +
> +  # Xen 4.0.0
> +  elif (
> +      cat>  $TMPC<<EOF
> +#include<xenctrl.h>
> +#include<xs.h>
> +#include<stdint.h>
> +#include<xen/hvm/hvm_info_table.h>
> +#if !defined(HVM_MAX_VCPUS)
> +# error HVM_MAX_VCPUS not defined
> +#endif
> +int main(void) {
> +  xs_daemon_open();
> +  xc_interface_open();
> +  xc_gnttab_open();
> +  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
> +  return 0;
> +}
>    

Really?  There's no VERSION #define?  Can please fix this upstream so we 
don't have to do this forever.

> diff --git a/hw/xen_backend.c b/hw/xen_backend.c
> index 860b038..7e78546 100644
> --- a/hw/xen_backend.c
> +++ b/hw/xen_backend.c
> @@ -43,7 +43,8 @@
>   /* ------------------------------------------------------------- */
>
>   /* public */
> -int xen_xc;
> +qemu_xc_interface xen_xc = XC_HANDLER_INITIAL_VALUE;
> +qemu_xc_gnttab xen_xcg = XC_HANDLER_INITIAL_VALUE;
>    

Where ever qemu_xc_interface comes from, the typename needs to change.
> +/* Xen unstable */
> +#if CONFIG_XEN_CTRL_INTERFACE_VERSION<  410
> +typedef int qemu_xc_interface;
>    

Ah, right here :-)

Regards,

Anthony Liguori