mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 06:06:44 +07:00
d9bab50aa4
Disappointing, as this was kind of neat (especially getting to use RCU to manage the address -> eventfd mapping). But now the devices are PCI handled in userspace, we get rid of both the NOTIFY hypercall and the interface to connect an eventfd. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
#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 */
|