diff mbox series

[03/16] xen: link against xentoolcore

Message ID 1524156319-11465-4-git-send-email-ian.jackson@eu.citrix.com
State New
Headers show
Series xen: xen-domid-restrict improvements | expand

Commit Message

Ian Jackson April 19, 2018, 4:45 p.m. UTC 
From: Anthony PERARD <anthony.perard@citrix.com>

Xen libraries in 4.10 include a new xentoolcore library.  This
contains the xentoolcore_restrict_all function which we are about to
want to use.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
---
v5: More truthful commit message.
---
 configure | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

Comments

Anthony PERARD April 23, 2018, 3:05 p.m. UTC | #1 
On Thu, Apr 19, 2018 at 05:45:06PM +0100, Ian Jackson wrote:
> From: Anthony PERARD <anthony.perard@citrix.com>
> 
> Xen libraries in 4.10 include a new xentoolcore library.  This
> contains the xentoolcore_restrict_all function which we are about to
> want to use.
> 
> Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
> Acked-by: Stefano Stabellini <sstabellini@kernel.org>
> ---
> v5: More truthful commit message.
> ---
>  configure | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/configure b/configure
> index 0a19b03..f580255 100755
> --- a/configure
> +++ b/configure
> @@ -2188,7 +2188,7 @@ if test "$xen" != "no" ; then
>        $($pkg_config --modversion xencontrol | sed 's/\./ /g') )"
>      xen=yes
>      xen_pc="xencontrol xenstore xenguest xenforeignmemory xengnttab"
> -    xen_pc="$xen_pc xenevtchn xendevicemodel"
> +    xen_pc="$xen_pc xenevtchn xendevicemodel xentoolcore"

I think we want to check if "xentoolcore" pkg_config exist before trying
to use it. Otherwith, that is not going to work with Xen older than
4.10.

`pkg-config --libs` will throw an error without printing anything if
one of the library doesn't exist.

Instead, we could do this:
if $pkg_config --exists xentoolcore; then
  xen_pc+=" xentoolcore"
fi

>      QEMU_CFLAGS="$QEMU_CFLAGS $($pkg_config --cflags $xen_pc)"
>      libs_softmmu="$($pkg_config --libs $xen_pc) $libs_softmmu"
>      LDFLAGS="$($pkg_config --libs $xen_pc) $LDFLAGS"
Ian Jackson April 24, 2018, 2:28 p.m. UTC | #2 
Anthony PERARD writes ("Re: [PATCH 03/16] xen: link against xentoolcore"):
> On Thu, Apr 19, 2018 at 05:45:06PM +0100, Ian Jackson wrote:
> >      xen_pc="xencontrol xenstore xenguest xenforeignmemory xengnttab"
> > -    xen_pc="$xen_pc xenevtchn xendevicemodel"
> > +    xen_pc="$xen_pc xenevtchn xendevicemodel xentoolcore"
> 
> I think we want to check if "xentoolcore" pkg_config exist before trying
> to use it. Otherwith, that is not going to work with Xen older than
> 4.10.

Yes.  Thanks for spotting this.  My tests were all with builds from in
the Xen tree and I hadn't spotted that that is handled as a special
case.

> Instead, we could do this:
> if $pkg_config --exists xentoolcore; then
>   xen_pc+=" xentoolcore"
> fi

I will test that.

Ian.
diff mbox series

Patch

diff --git a/configure b/configure
index 0a19b03..f580255 100755
--- a/configure
+++ b/configure
@@ -2188,7 +2188,7 @@  if test "$xen" != "no" ; then
       $($pkg_config --modversion xencontrol | sed 's/\./ /g') )"
     xen=yes
     xen_pc="xencontrol xenstore xenguest xenforeignmemory xengnttab"
-    xen_pc="$xen_pc xenevtchn xendevicemodel"
+    xen_pc="$xen_pc xenevtchn xendevicemodel xentoolcore"
     QEMU_CFLAGS="$QEMU_CFLAGS $($pkg_config --cflags $xen_pc)"
     libs_softmmu="$($pkg_config --libs $xen_pc) $libs_softmmu"
     LDFLAGS="$($pkg_config --libs $xen_pc) $LDFLAGS"
@@ -2220,18 +2220,20 @@  EOF
         cat > $TMPC <<EOF &&
 #undef XC_WANT_COMPAT_MAP_FOREIGN_API
 #include <xenforeignmemory.h>
+#include <xentoolcore.h>
 int main(void) {
   xenforeignmemory_handle *xfmem;
 
   xfmem = xenforeignmemory_open(0, 0);
   xenforeignmemory_map2(xfmem, 0, 0, 0, 0, 0, 0, 0);
+  xentoolcore_restrict_all(0);
 
   return 0;
 }
 EOF
-        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs"
+        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs -lxentoolcore"
       then
-      xen_stable_libs="-lxendevicemodel $xen_stable_libs"
+      xen_stable_libs="-lxendevicemodel $xen_stable_libs -lxentoolcore"
       xen_ctrl_version=41000
       xen=yes
     elif