FM / io

/usr/src/linux-headers-5.15.0-190/include/xen/interface/io/

/usr/src/linux-headers-5.15.0-190/include/xen/interface/io

Name	Size	Mode	Actions
9pfs.h	1466	0644	edit dl rm
blkif.h	13206	0644	edit dl rm
console.h	587	0644	edit dl rm
displif.h	44263	0644	edit dl rm
fbif.h	4586	0644	edit dl rm
kbdif.h	24273	0644	edit dl rm
netif.h	35590	0644	edit dl rm
pciif.h	3601	0644	edit dl rm
protocols.h	697	0644	edit dl rm
pvcalls.h	3113	0644	edit dl rm
ring.h	23756	0644	edit dl rm
sndif.h	49478	0644	edit dl rm
tpmif.h	1704	0644	edit dl rm
vscsiif.h	8908	0644	edit dl rm
xenbus.h	1173	0644	edit dl rm
xs_wire.h	2263	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/include/xen/interface/io/tpmif.h (1704B)

/******************************************************************************
 * 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[]; /* grant IDs; length in nr_extra_pages */
};

#endif

/****************************************************************************** * 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[]; /* grant IDs; length in nr_extra_pages */ }; #endif