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/******************************************************************************
 * tpmif.h
 *
 * TPM I/O interface for Xen guest OSes, v2
 *
 * This file is in the public domain.
 *
 */

#ifndef __XEN_PUBLIC_IO_TPMIF_H__
#define __XEN_PUBLIC_IO_TPMIF_H__

/*
 * Xenbus state machine
 *
 * Device open:
 *   1. Both ends start in XenbusStateInitialising
 *   2. Backend transitions to InitWait (frontend does not wait on this step)
 *   3. Frontend populates ring-ref, event-channel, feature-protocol-v2
 *   4. Frontend transitions to Initialised
 *   5. Backend maps grant and event channel, verifies feature-protocol-v2
 *   6. Backend transitions to Connected
 *   7. Frontend verifies feature-protocol-v2, transitions to Connected
 *
 * Device close:
 *   1. State is changed to XenbusStateClosing
 *   2. Frontend transitions to Closed
 *   3. Backend unmaps grant and event, changes state to InitWait
 */

enum vtpm_shared_page_state {
	VTPM_STATE_IDLE,         /* no contents / vTPM idle / cancel complete */
	VTPM_STATE_SUBMIT,       /* request ready / vTPM working */
	VTPM_STATE_FINISH,       /* response ready / vTPM idle */
	VTPM_STATE_CANCEL,       /* cancel requested / vTPM working */
};
/* The backend should only change state to IDLE or FINISH, while the
 * frontend should only change to SUBMIT or CANCEL. */


struct vtpm_shared_page {
	uint32_t length;         /* request/response length in bytes */

	uint8_t state;           /* enum vtpm_shared_page_state */
	uint8_t locality;        /* for the current request */
	uint8_t pad;

	uint8_t nr_extra_pages;  /* extra pages for long packets; may be zero */
	uint32_t extra_pages[0]; /* grant IDs; length in nr_extra_pages */
};

#endif

Filemanager

Name Type Size Permission Actions
9pfs.h File 1.43 KB 0644
blkif.h File 12.9 KB 0644
console.h File 587 B 0644
displif.h File 39.03 KB 0644
fbif.h File 4.48 KB 0644
kbdif.h File 22.25 KB 0644
netif.h File 34.08 KB 0644
pciif.h File 3.52 KB 0644
protocols.h File 697 B 0644
pvcalls.h File 3.04 KB 0644
ring.h File 23.2 KB 0644
sndif.h File 34.89 KB 0644
tpmif.h File 1.67 KB 0644
vscsiif.h File 8.7 KB 0644
xenbus.h File 1.29 KB 0644
xs_wire.h File 2.21 KB 0644