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diff --git a/qemu/roms/seabios/src/fw/paravirt.h b/qemu/roms/seabios/src/fw/paravirt.h
new file mode 100644
index 000000000..95ffb92ad
--- /dev/null
+++ b/qemu/roms/seabios/src/fw/paravirt.h
@@ -0,0 +1,37 @@
+#ifndef __PV_H
+#define __PV_H
+
+#include "config.h" // CONFIG_*
+#include "biosvar.h" // GET_GLOBAL
+
+// Types of paravirtualized platforms.
+#define PF_QEMU     (1<<0)
+#define PF_XEN      (1<<1)
+#define PF_KVM      (1<<2)
+
+extern u32 RamSize;
+extern u64 RamSizeOver4G;
+extern int PlatformRunningOn;
+
+static inline int runningOnQEMU(void) {
+    return CONFIG_QEMU || (
+        CONFIG_QEMU_HARDWARE && GET_GLOBAL(PlatformRunningOn) & PF_QEMU);
+}
+static inline int runningOnXen(void) {
+    return CONFIG_XEN && GET_GLOBAL(PlatformRunningOn) & PF_XEN;
+}
+static inline int runningOnKVM(void) {
+    return CONFIG_QEMU && GET_GLOBAL(PlatformRunningOn) & PF_KVM;
+}
+
+// Common paravirt ports.
+#define PORT_SMI_CMD           0x00b2
+#define PORT_SMI_STATUS        0x00b3
+#define PORT_QEMU_CFG_CTL      0x0510
+#define PORT_QEMU_CFG_DATA     0x0511
+
+void qemu_preinit(void);
+void qemu_platform_setup(void);
+void qemu_cfg_init(void);
+
+#endif