xen: add a dummy xc_hvm_inject_msi for Xen < 4.2
xc_hvm_inject_msi is only available on Xen >= 4.2: add a dummy
compatibility function for Xen < 4.2.
Also enable msi support only on Xen >= 4.2.
Signed-off-by: Stefano Stabellini <[email protected]>
Acked-by: Anthony PERARD <[email protected]>
diff --git a/hw/pc.c b/hw/pc.c
index 1f5aacb..4d34a33 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -916,7 +916,7 @@
msi_supported = true;
}
- if (xen_enabled()) {
+ if (xen_msi_support()) {
msi_supported = true;
}
diff --git a/hw/xen.h b/hw/xen.h
index e5926b7..3ae4cd0 100644
--- a/hw/xen.h
+++ b/hw/xen.h
@@ -57,4 +57,14 @@
# define HVM_MAX_VCPUS 32
#endif
+static inline int xen_msi_support(void)
+{
+#if defined(CONFIG_XEN_CTRL_INTERFACE_VERSION) \
+ && CONFIG_XEN_CTRL_INTERFACE_VERSION >= 420
+ return xen_enabled();
+#else
+ return 0;
+#endif
+}
+
#endif /* QEMU_HW_XEN_H */
diff --git a/hw/xen_common.h b/hw/xen_common.h
index 0409ac7..7043c14 100644
--- a/hw/xen_common.h
+++ b/hw/xen_common.h
@@ -133,6 +133,21 @@
}
#endif
+/* Xen before 4.2 */
+#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 420
+static inline int xen_xc_hvm_inject_msi(XenXC xen_xc, domid_t dom,
+ uint64_t addr, uint32_t data)
+{
+ return -ENOSYS;
+}
+#else
+static inline int xen_xc_hvm_inject_msi(XenXC xen_xc, domid_t dom,
+ uint64_t addr, uint32_t data)
+{
+ return xc_hvm_inject_msi(xen_xc, dom, addr, data);
+}
+#endif
+
void destroy_hvm_domain(void);
#endif /* QEMU_HW_XEN_COMMON_H */
diff --git a/xen-all.c b/xen-all.c
index a08eec0..bdf9c0f 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -129,7 +129,7 @@
void xen_hvm_inject_msi(uint64_t addr, uint32_t data)
{
- xc_hvm_inject_msi(xen_xc, xen_domid, addr, data);
+ xen_xc_hvm_inject_msi(xen_xc, xen_domid, addr, data);
}
static void xen_suspend_notifier(Notifier *notifier, void *data)
