From: Anthony PERARD<anthony.per...@citrix.com>
This patch adds a generic layer for xc calls, allowing us to choose
between the
xenner and xen implementations at runtime.
It also 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 check libxenctrl version in configure, from Xen 3.3.0 to Xen
unstable.
Signed-off-by: Anthony PERARD<anthony.per...@citrix.com>
Signed-off-by: Stefano Stabellini<stefano.stabell...@eu.citrix.com>
Acked-by: Alexander Graf<ag...@suse.de>
---
Makefile.target | 3 +
configure | 62 +++++++++++++++-
hw/xen_backend.c | 74 ++++++++++---------
hw/xen_backend.h | 7 +-
hw/xen_common.h | 38 ++++++----
hw/xen_console.c | 10 +-
hw/xen_devconfig.c | 10 +-
hw/xen_disk.c | 28 ++++---
hw/xen_domainbuild.c | 29 ++++----
hw/xen_interfaces.c | 191
++++++++++++++++++++++++++++++++++++++++++++++++
hw/xen_interfaces.h | 198
++++++++++++++++++++++++++++++++++++++++++++++++++
hw/xen_nic.c | 36 +++++-----
hw/xenfb.c | 14 ++--
13 files changed, 584 insertions(+), 116 deletions(-)
create mode 100644 hw/xen_interfaces.c
create mode 100644 hw/xen_interfaces.h
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> $TMPC<<EOF
+#include<xenctrl.h>
+#include<xs.h>
+#include<stdint.h>
+#include<xen/hvm/hvm_info_table.h>
+#if !defined(HVM_MAX_VCPUS)
+# error HVM_MAX_VCPUS not defined
+#endif
+int main(void) {
+ xs_daemon_open();
+ xc_interface_open();
+ xc_gnttab_open();
+ xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
+ return 0;
+}
+EOF
+ compile_prog "" "$xen_libs"
+ ) ; then
+ xen_ctrl_version=400
+ xen=yes
+
+ # Xen 3.3.0, 3.4.0
+ elif (
+ cat> $TMPC<<EOF
+#include<xenctrl.h>
+#include<xs.h>
+int main(void) {
+ xs_daemon_open();
+ xc_interface_open();
+ xc_gnttab_open();
+ xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
+ return 0;
+}
+EOF
+ compile_prog "" "$xen_libs"
+ ) ; then
+ xen_ctrl_version=330
xen=yes
+
+ # Xen not found or unsupported
else
if test "$xen" = "yes" ; then
feature_not_found "xen"
@@ -3009,6 +3068,7 @@ case "$target_arch2" in
if test "$xen" = "yes" -a "$target_softmmu" = "yes" ; then
echo "CONFIG_XEN=y">> $config_target_mak
echo "LIBS+=$xen_libs">> $config_target_mak
+ echo "CONFIG_XEN_CTRL_INTERFACE_VERSION=$xen_ctrl_version">>
$config_target_mak
fi
esac
case "$target_arch2" in
diff --git a/hw/xen_backend.c b/hw/xen_backend.c
index 860b038..cf081e1 100644
--- a/hw/xen_backend.c
+++ b/hw/xen_backend.c
@@ -43,7 +43,8 @@
/* ------------------------------------------------------------- */
/* public */
-int xen_xc;
+XenXC xen_xc = XC_HANDLER_INITIAL_VALUE;
+XenGnttab xen_xcg = XC_HANDLER_INITIAL_VALUE;
struct xs_handle *xenstore = NULL;
const char *xen_protocol;
@@ -58,7 +59,7 @@ int xenstore_write_str(const char *base, const char
*node, const char *val)
char abspath[XEN_BUFSIZE];
snprintf(abspath, sizeof(abspath), "%s/%s", base, node);
- if (!xs_write(xenstore, 0, abspath, val, strlen(val)))
+ if (!xs_ops.write(xenstore, 0, abspath, val, strlen(val)))
return -1;
return 0;
}
@@ -70,7 +71,7 @@ char *xenstore_read_str(const char *base, const char
*node)
char *str, *ret = NULL;
snprintf(abspath, sizeof(abspath), "%s/%s", base, node);
- str = xs_read(xenstore, 0, abspath,&len);
+ str = xs_ops.read(xenstore, 0, abspath,&len);
