meson, configure: move Xen detection to meson

This is quite a complicated check.  I moved all the test programs to
a single file in scripts/, picking the right program with #if and a -D
flag in meson.build's cc.links() invocation.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 203 insertions, 0 deletions

diff --git a/scripts/xen-detect.c b/scripts/xen-detect.c
new file mode 100644
index 0000000000..85e8206490
--- /dev/null
+++ b/scripts/xen-detect.c
@@ -0,0 +1,203 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/* Test programs for various Xen versions that QEMU supports.  */
+#if CONFIG_XEN_CTRL_INTERFACE_VERSION == 41100
+  #undef XC_WANT_COMPAT_DEVICEMODEL_API
+  #define __XEN_TOOLS__
+  #include <xendevicemodel.h>
+  #include <xenforeignmemory.h>
+  int main(void) {
+    xendevicemodel_handle *xd;
+    xenforeignmemory_handle *xfmem;
+
+    xd = xendevicemodel_open(0, 0);
+    xendevicemodel_pin_memory_cacheattr(xd, 0, 0, 0, 0);
+
+    xfmem = xenforeignmemory_open(0, 0);
+    xenforeignmemory_map_resource(xfmem, 0, 0, 0, 0, 0, NULL, 0, 0);
+
+    return 0;
+  }
+
+#elif CONFIG_XEN_CTRL_INTERFACE_VERSION == 41000
+  #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;
+  }
+
+#elif CONFIG_XEN_CTRL_INTERFACE_VERSION == 40900
+  #undef XC_WANT_COMPAT_DEVICEMODEL_API
+  #define __XEN_TOOLS__
+  #include <xendevicemodel.h>
+  int main(void) {
+    xendevicemodel_handle *xd;
+
+    xd = xendevicemodel_open(0, 0);
+    xendevicemodel_close(xd);
+
+    return 0;
+  }
+
+#elif CONFIG_XEN_CTRL_INTERFACE_VERSION == 40800
+  /*
+   * If we have stable libs the we don't want the libxc compat
+   * layers, regardless of what CFLAGS we may have been given.
+   *
+   * Also, check if xengnttab_grant_copy_segment_t is defined and
+   * grant copy operation is implemented.
+   */
+  #undef XC_WANT_COMPAT_EVTCHN_API
+  #undef XC_WANT_COMPAT_GNTTAB_API
+  #undef XC_WANT_COMPAT_MAP_FOREIGN_API
+  #include <xenctrl.h>
+  #include <xenstore.h>
+  #include <xenevtchn.h>
+  #include <xengnttab.h>
+  #include <xenforeignmemory.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) {
+    xc_interface *xc = NULL;
+    xenforeignmemory_handle *xfmem;
+    xenevtchn_handle *xe;
+    xengnttab_handle *xg;
+    xengnttab_grant_copy_segment_t* seg = NULL;
+
+    xs_daemon_open();
+
+    xc = xc_interface_open(0, 0, 0);
+    xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
+    xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
+    xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
+    xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);
+
+    xfmem = xenforeignmemory_open(0, 0);
+    xenforeignmemory_map(xfmem, 0, 0, 0, 0, 0);
+
+    xe = xenevtchn_open(0, 0);
+    xenevtchn_fd(xe);
+
+    xg = xengnttab_open(0, 0);
+    xengnttab_grant_copy(xg, 0, seg);
+
+    return 0;
+  }
+
+#elif CONFIG_XEN_CTRL_INTERFACE_VERSION == 40701
+  /*
+   * If we have stable libs the we don't want the libxc compat
+   * layers, regardless of what CFLAGS we may have been given.
+   */
+  #undef XC_WANT_COMPAT_EVTCHN_API
+  #undef XC_WANT_COMPAT_GNTTAB_API
+  #undef XC_WANT_COMPAT_MAP_FOREIGN_API
+  #include <xenctrl.h>
+  #include <xenstore.h>
+  #include <xenevtchn.h>
+  #include <xengnttab.h>
+  #include <xenforeignmemory.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) {
+    xc_interface *xc = NULL;
+    xenforeignmemory_handle *xfmem;
+    xenevtchn_handle *xe;
+    xengnttab_handle *xg;
+
+    xs_daemon_open();
+
+    xc = xc_interface_open(0, 0, 0);
+    xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
+    xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
+    xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
+    xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);
+
+    xfmem = xenforeignmemory_open(0, 0);
+    xenforeignmemory_map(xfmem, 0, 0, 0, 0, 0);
+
+    xe = xenevtchn_open(0, 0);
+    xenevtchn_fd(xe);
+
+    xg = xengnttab_open(0, 0);
+    xengnttab_map_grant_ref(xg, 0, 0, 0);
+
+    return 0;
+  }
+
+#elif CONFIG_XEN_CTRL_INTERFACE_VERSION == 40600
+  #include <xenctrl.h>
+  #include <xenstore.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) {
+    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);
+    xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
+    xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
+    xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);
+    xc_reserved_device_memory_map(xc, 0, 0, 0, 0, NULL, 0);
+    return 0;
+  }
+
+#elif CONFIG_XEN_CTRL_INTERFACE_VERSION == 40500
+  #include <xenctrl.h>
+  #include <xenstore.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) {
+    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);
+    xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
+    xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
+    xc_hvm_create_ioreq_server(xc, 0, 0, NULL);
+    return 0;
+  }
+
+#elif CONFIG_XEN_CTRL_INTERFACE_VERSION == 40200
+  #include <xenctrl.h>
+  #include <xenstore.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) {
+    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);
+    xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
+    xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
+    return 0;
+  }
+
+#else
+#error invalid CONFIG_XEN_CTRL_INTERFACE_VERSION
+#endif