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Revision 32ffa4f71e10009498ae6b54da65ab316db967bd authored by Axel Rasmussen on 19 May 2021, 20:03:33 UTC, committed by Paolo Bonzini on 27 May 2021, 11:45:55 UTC 
KVM: selftests: compute correct demand paging size
 
This is a preparatory commit needed before we can use different kinds of
backing pages for guest memory.

Previously, we used perf_test_args.host_page_size, which is the host's
native page size (commonly 4K). For VM_MEM_SRC_ANONYMOUS this turns out
to be okay, but in a follow-up commit we want to allow using different
kinds of backing memory.

Take VM_MEM_SRC_ANONYMOUS_HUGETLB for example. Without this change, if
we used that backing page type, when we issued a UFFDIO_COPY ioctl we'd
only do so with 4K, rather than the full 2M of a backing hugepage. In
this case, UFFDIO_COPY returns -EINVAL (__mcopy_atomic_hugetlb checks
the size).

Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Message-Id: <20210519200339.829146-5-axelrasmussen@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 25408e5
Raw File
setup_protocol.h 
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * IPWireless 3G PCMCIA Network Driver
 *
 * Original code
 *   by Stephen Blackheath <stephen@blacksapphire.com>,
 *      Ben Martel <benm@symmetric.co.nz>
 *
 * Copyrighted as follows:
 *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
 *
 * Various driver changes and rewrites, port to new kernels
 *   Copyright (C) 2006-2007 Jiri Kosina
 *
 * Misc code cleanups and updates
 *   Copyright (C) 2007 David Sterba
 */

#ifndef _IPWIRELESS_CS_SETUP_PROTOCOL_H_
#define _IPWIRELESS_CS_SETUP_PROTOCOL_H_

/* Version of the setup protocol and transport protocols */
#define TL_SETUP_VERSION		1

#define TL_SETUP_VERSION_QRY_TMO	1000
#define TL_SETUP_MAX_VERSION_QRY	30

/* Message numbers 0-9 are obsoleted and must not be reused! */
#define TL_SETUP_SIGNO_GET_VERSION_QRY	10
#define TL_SETUP_SIGNO_GET_VERSION_RSP	11
#define TL_SETUP_SIGNO_CONFIG_MSG	12
#define TL_SETUP_SIGNO_CONFIG_DONE_MSG	13
#define TL_SETUP_SIGNO_OPEN_MSG		14
#define TL_SETUP_SIGNO_CLOSE_MSG	15

#define TL_SETUP_SIGNO_INFO_MSG     20
#define TL_SETUP_SIGNO_INFO_MSG_ACK 21

#define TL_SETUP_SIGNO_REBOOT_MSG      22
#define TL_SETUP_SIGNO_REBOOT_MSG_ACK  23

/* Synchronous start-messages */
struct tl_setup_get_version_qry {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_GET_VERSION_QRY */
} __attribute__ ((__packed__));

struct tl_setup_get_version_rsp {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_GET_VERSION_RSP */
	unsigned char version;		/* TL_SETUP_VERSION */
} __attribute__ ((__packed__));

struct tl_setup_config_msg {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_CONFIG_MSG */
	unsigned char port_no;
	unsigned char prio_data;
	unsigned char prio_ctrl;
} __attribute__ ((__packed__));

struct tl_setup_config_done_msg {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_CONFIG_DONE_MSG */
} __attribute__ ((__packed__));

/* Asynchronous messages */
struct tl_setup_open_msg {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_OPEN_MSG */
	unsigned char port_no;
} __attribute__ ((__packed__));

struct tl_setup_close_msg {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_CLOSE_MSG */
	unsigned char port_no;
} __attribute__ ((__packed__));

/* Driver type  - for use in tl_setup_info_msg.driver_type */
#define COMM_DRIVER     0
#define NDISWAN_DRIVER  1
#define NDISWAN_DRIVER_MAJOR_VERSION  2
#define NDISWAN_DRIVER_MINOR_VERSION  0

/*
 * It should not matter when this message comes over as we just store the
 * results and send the ACK.
 */
struct tl_setup_info_msg {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_INFO_MSG */
	unsigned char driver_type;
	unsigned char major_version;
	unsigned char minor_version;
} __attribute__ ((__packed__));

struct tl_setup_info_msgAck {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_INFO_MSG_ACK */
} __attribute__ ((__packed__));

struct TlSetupRebootMsgAck {
	unsigned char sig_no;		/* TL_SETUP_SIGNO_REBOOT_MSG_ACK */
} __attribute__ ((__packed__));

/* Define a union of all the msgs that the driver can receive from the card.*/
union ipw_setup_rx_msg {
	unsigned char sig_no;
	struct tl_setup_get_version_rsp version_rsp_msg;
	struct tl_setup_open_msg open_msg;
	struct tl_setup_close_msg close_msg;
	struct tl_setup_info_msg InfoMsg;
	struct tl_setup_info_msgAck info_msg_ack;
} __attribute__ ((__packed__));

#endif				/* _IPWIRELESS_CS_SETUP_PROTOCOL_H_ */
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