Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / lguest_launcher.h

diff --git a/kernel/include/linux/lguest_launcher.h b/kernel/include/linux/lguest_launcher.h
new file mode 100644 (file)
index 0000000..acd5b12
--- /dev/null
+++ b/kernel/include/linux/lguest_launcher.h
@@ -0,0 +1,44 @@
+#ifndef _LINUX_LGUEST_LAUNCHER
+#define _LINUX_LGUEST_LAUNCHER
+/* Everything the "lguest" userspace program needs to know. */
+#include <linux/types.h>
+
+/*D:010
+ * Drivers
+ *
+ * The Guest needs devices to do anything useful.  Since we don't let it touch
+ * real devices (think of the damage it could do!) we provide virtual devices.
+ * We emulate a PCI bus with virtio devices on it; we used to have our own
+ * lguest bus which was far simpler, but this tests the virtio 1.0 standard.
+ *
+ * Virtio devices are also used by kvm, so we can simply reuse their optimized
+ * device drivers.  And one day when everyone uses virtio, my plan will be
+ * complete.  Bwahahahah!
+ */
+
+/* Write command first word is a request. */
+enum lguest_req
+{
+       LHREQ_INITIALIZE, /* + base, pfnlimit, start */
+       LHREQ_GETDMA, /* No longer used */
+       LHREQ_IRQ, /* + irq */
+       LHREQ_BREAK, /* No longer used */
+       LHREQ_EVENTFD, /* No longer used. */
+       LHREQ_GETREG, /* + offset within struct pt_regs (then read value). */
+       LHREQ_SETREG, /* + offset within struct pt_regs, value. */
+       LHREQ_TRAP, /* + trap number to deliver to guest. */
+};
+
+/*
+ * This is what read() of the lguest fd populates.  trap ==
+ * LGUEST_TRAP_ENTRY for an LHCALL_NOTIFY (addr is the
+ * argument), 14 for a page fault in the MMIO region (addr is
+ * the trap address, insn is the instruction), or 13 for a GPF
+ * (insn is the instruction).
+ */
+struct lguest_pending {
+       __u8 trap;
+       __u8 insn[7];
+       __u32 addr;
+};
+#endif /* _LINUX_LGUEST_LAUNCHER */