cregit-Linux how code gets into the kernel

Release 4.12 include/linux/lguest_launcher.h

Directory: include/linux

/* Everything the "lguest" userspace program needs to know. */
#include <linux/types.h>

 * 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;

Overall Contributors

Rusty Russell6198.39%1191.67%
Matias Zabaljauregui11.61%18.33%
Directory: include/linux
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