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Commit f1b0a434 authored by Harald Freudenberger's avatar Harald Freudenberger Committed by Martin Schwidefsky
Browse files

s390/zcrypt: Integrate ap_asm.h into include/asm/ap.h. 



Move all the inline functions from the ap bus header
file ap_asm.h into the in-kernel api header file
arch/s390/include/asm/ap.h so that KVM can make use
of all the low level AP functions.

Signed-off-by: default avatarHarald Freudenberger <freude@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 4a07750b

arch/s390/include/asm/ap.h

+257 −27
Original line number Diff line number Diff line
@@ -46,6 +46,50 @@ struct ap_queue_status { 
	unsigned int _pad2		: 16;

};



/**

 * ap_intructions_available() - Test if AP instructions are available.

 *

 * Returns 0 if the AP instructions are installed.

 */

static inline int ap_instructions_available(void)

{

	register unsigned long reg0 asm ("0") = AP_MKQID(0, 0);

	register unsigned long reg1 asm ("1") = -ENODEV;

	register unsigned long reg2 asm ("2");



	asm volatile(

		"   .long 0xb2af0000\n"		/* PQAP(TAPQ) */

		"0: la    %0,0\n"

		"1:\n"

		EX_TABLE(0b, 1b)

		: "+d" (reg1), "=d" (reg2)

		: "d" (reg0)

		: "cc");

	return reg1;

}



/**

 * ap_tapq(): Test adjunct processor queue.

 * @qid: The AP queue number

 * @info: Pointer to queue descriptor

 *

 * Returns AP queue status structure.

 */

static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)

{

	register unsigned long reg0 asm ("0") = qid;

	register struct ap_queue_status reg1 asm ("1");

	register unsigned long reg2 asm ("2");



	asm volatile(".long 0xb2af0000"		/* PQAP(TAPQ) */

		     : "=d" (reg1), "=d" (reg2)

		     : "d" (reg0)

		     : "cc");

	if (info)

		*info = reg2;

	return reg1;

}



/**

 * ap_test_queue(): Test adjunct processor queue.

 * @qid: The AP queue number
@@ -54,10 +98,57 @@ struct ap_queue_status { 
 *

 * Returns AP queue status structure.

 */

struct ap_queue_status ap_test_queue(ap_qid_t qid,

static inline struct ap_queue_status ap_test_queue(ap_qid_t qid,

						   int tbit,

				     unsigned long *info);

						   unsigned long *info)

{

	if (tbit)

		qid |= 1UL << 23; /* set T bit*/

	return ap_tapq(qid, info);

}



/**

 * ap_pqap_rapq(): Reset adjunct processor queue.

 * @qid: The AP queue number

 *

 * Returns AP queue status structure.

 */

static inline struct ap_queue_status ap_rapq(ap_qid_t qid)

{

	register unsigned long reg0 asm ("0") = qid | (1UL << 24);

	register struct ap_queue_status reg1 asm ("1");



	asm volatile(

		".long 0xb2af0000"		/* PQAP(RAPQ) */

		: "=d" (reg1)

		: "d" (reg0)

		: "cc");

	return reg1;

}



/**

 * ap_pqap_zapq(): Reset and zeroize adjunct processor queue.

 * @qid: The AP queue number

 *

 * Returns AP queue status structure.

 */

static inline struct ap_queue_status ap_zapq(ap_qid_t qid)

{

	register unsigned long reg0 asm ("0") = qid | (2UL << 24);

	register struct ap_queue_status reg1 asm ("1");



	asm volatile(

		".long 0xb2af0000"		/* PQAP(ZAPQ) */

		: "=d" (reg1)

		: "d" (reg0)

		: "cc");

	return reg1;

}



/**

 * struct ap_config_info - convenience struct for AP crypto

 * config info as returned by the ap_qci() function.

 */

struct ap_config_info {

	unsigned int apsc	 : 1;	/* S bit */

	unsigned int apxa	 : 1;	/* N bit */
@@ -74,21 +165,34 @@ struct ap_config_info { 
	unsigned char _reserved4[16];

} __aligned(8);



/*

 * ap_query_configuration(): Fetch cryptographic config info

/**

 * ap_qci(): Get AP configuration data

 *

 * Returns the ap configuration info fetched via PQAP(QCI).

 * On success 0 is returned, on failure a negative errno

 * is returned, e.g. if the PQAP(QCI) instruction is not

 * available, the return value will be -EOPNOTSUPP.

 * Returns 0 on success, or -EOPNOTSUPP.

 */

int ap_query_configuration(struct ap_config_info *info);

static inline int ap_qci(struct ap_config_info *config)

{

	register unsigned long reg0 asm ("0") = 4UL << 24;

	register unsigned long reg1 asm ("1") = -EOPNOTSUPP;

	register struct ap_config_info *reg2 asm ("2") = config;



	asm volatile(

		".long 0xb2af0000\n"		/* PQAP(QCI) */

		"0: la    %0,0\n"

		"1:\n"

		EX_TABLE(0b, 1b)

		: "+d" (reg1)

		: "d" (reg0), "d" (reg2)

		: "cc", "memory");



	return reg1;

}



/*

 * struct ap_qirq_ctrl - convenient struct for easy invocation

 * of the ap_queue_irq_ctrl() function. This struct is passed

 * as GR1 parameter to the PQAP(AQIC) instruction. For details

 * please see the AR documentation.

 * of the ap_aqic() function. This struct is passed as GR1

 * parameter to the PQAP(AQIC) instruction. For details please

 * see the AR documentation.

 */

struct ap_qirq_ctrl {

	unsigned int _res1 : 8;
@@ -105,19 +209,145 @@ struct ap_qirq_ctrl { 
};



/**

 * ap_queue_irq_ctrl(): Control interruption on a AP queue.

 * ap_aqic(): Control interruption for a specific AP.

 * @qid: The AP queue number

 * @qirqctrl: struct ap_qirq_ctrl, see above

 * @qirqctrl: struct ap_qirq_ctrl (64 bit value)

 * @ind: The notification indicator byte

 *

 * Returns AP queue status.

 *

 * Control interruption on the given AP queue.

 * Just a simple wrapper function for the low level PQAP(AQIC)

 * instruction available for other kernel modules.

 */

struct ap_queue_status ap_queue_irq_ctrl(ap_qid_t qid,

static inline struct ap_queue_status ap_aqic(ap_qid_t qid,

					     struct ap_qirq_ctrl qirqctrl,

					 void *ind);

					     void *ind)

{

	register unsigned long reg0 asm ("0") = qid | (3UL << 24);

	register struct ap_qirq_ctrl reg1_in asm ("1") = qirqctrl;

	register struct ap_queue_status reg1_out asm ("1");

	register void *reg2 asm ("2") = ind;



	asm volatile(

		".long 0xb2af0000"		/* PQAP(AQIC) */

		: "=d" (reg1_out)

		: "d" (reg0), "d" (reg1_in), "d" (reg2)

		: "cc");

	return reg1_out;

}



/*

 * union ap_qact_ap_info - used together with the

 * ap_aqic() function to provide a convenient way

 * to handle the ap info needed by the qact function.

 */

union ap_qact_ap_info {

	unsigned long val;

	struct {

		unsigned int	  : 3;

		unsigned int mode : 3;

		unsigned int	  : 26;

		unsigned int cat  : 8;

		unsigned int	  : 8;

		unsigned char ver[2];

	};

};



/**

 * ap_qact(): Query AP combatibility type.

 * @qid: The AP queue number

 * @apinfo: On input the info about the AP queue. On output the

 *	    alternate AP queue info provided by the qact function

 *	    in GR2 is stored in.

 *

 * Returns AP queue status. Check response_code field for failures.

 */

static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,

					     union ap_qact_ap_info *apinfo)

{

	register unsigned long reg0 asm ("0") = qid | (5UL << 24)

		| ((ifbit & 0x01) << 22);

	register unsigned long reg1_in asm ("1") = apinfo->val;

	register struct ap_queue_status reg1_out asm ("1");

	register unsigned long reg2 asm ("2");



	asm volatile(

		".long 0xb2af0000"		/* PQAP(QACT) */

		: "+d" (reg1_in), "=d" (reg1_out), "=d" (reg2)

		: "d" (reg0)

		: "cc");

	apinfo->val = reg2;

	return reg1_out;

}



/**

 * ap_nqap(): Send message to adjunct processor queue.

 * @qid: The AP queue number

 * @psmid: The program supplied message identifier

 * @msg: The message text

 * @length: The message length

 *

 * Returns AP queue status structure.

 * Condition code 1 on NQAP can't happen because the L bit is 1.

 * Condition code 2 on NQAP also means the send is incomplete,

 * because a segment boundary was reached. The NQAP is repeated.

 */

static inline struct ap_queue_status ap_nqap(ap_qid_t qid,

					     unsigned long long psmid,

					     void *msg, size_t length)

{

	register unsigned long reg0 asm ("0") = qid | 0x40000000UL;

	register struct ap_queue_status reg1 asm ("1");

	register unsigned long reg2 asm ("2") = (unsigned long) msg;

	register unsigned long reg3 asm ("3") = (unsigned long) length;

	register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32);

	register unsigned long reg5 asm ("5") = psmid & 0xffffffff;



	asm volatile (

		"0: .long 0xb2ad0042\n"		/* NQAP */

		"   brc   2,0b"

		: "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3)

		: "d" (reg4), "d" (reg5)

		: "cc", "memory");

	return reg1;

}



/**

 * ap_dqap(): Receive message from adjunct processor queue.

 * @qid: The AP queue number

 * @psmid: Pointer to program supplied message identifier

 * @msg: The message text

 * @length: The message length

 *

 * Returns AP queue status structure.

 * Condition code 1 on DQAP means the receive has taken place

 * but only partially.	The response is incomplete, hence the

 * DQAP is repeated.

 * Condition code 2 on DQAP also means the receive is incomplete,

 * this time because a segment boundary was reached. Again, the

 * DQAP is repeated.

 * Note that gpr2 is used by the DQAP instruction to keep track of

 * any 'residual' length, in case the instruction gets interrupted.

 * Hence it gets zeroed before the instruction.

 */

static inline struct ap_queue_status ap_dqap(ap_qid_t qid,

					     unsigned long long *psmid,

					     void *msg, size_t length)

{

	register unsigned long reg0 asm("0") = qid | 0x80000000UL;

	register struct ap_queue_status reg1 asm ("1");

	register unsigned long reg2 asm("2") = 0UL;

	register unsigned long reg4 asm("4") = (unsigned long) msg;

	register unsigned long reg5 asm("5") = (unsigned long) length;

	register unsigned long reg6 asm("6") = 0UL;

	register unsigned long reg7 asm("7") = 0UL;





	asm volatile(

		"0: .long 0xb2ae0064\n"		/* DQAP */

		"   brc   6,0b\n"

		: "+d" (reg0), "=d" (reg1), "+d" (reg2),

		  "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7)

		: : "cc", "memory");

	*psmid = (((unsigned long long) reg6) << 32) + reg7;

	return reg1;

}



#endif /* _ASM_S390_AP_H_ */

drivers/s390/crypto/ap_asm.h

deleted100644 → 0
+0 −261
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright IBM Corp. 2016

 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>

 *

 * Adjunct processor bus inline assemblies.

 */



#ifndef _AP_ASM_H_

#define _AP_ASM_H_



#include <asm/isc.h>



/**

 * ap_intructions_available() - Test if AP instructions are available.

 *

 * Returns 0 if the AP instructions are installed.

 */

static inline int ap_instructions_available(void)

{

	register unsigned long reg0 asm ("0") = AP_MKQID(0, 0);

	register unsigned long reg1 asm ("1") = -ENODEV;

	register unsigned long reg2 asm ("2");



	asm volatile(

		"   .long 0xb2af0000\n"		/* PQAP(TAPQ) */

		"0: la    %0,0\n"

		"1:\n"

		EX_TABLE(0b, 1b)

		: "+d" (reg1), "=d" (reg2)

		: "d" (reg0)

		: "cc");

	return reg1;

}



/**

 * ap_tapq(): Test adjunct processor queue.

 * @qid: The AP queue number

 * @info: Pointer to queue descriptor

 *

 * Returns AP queue status structure.

 */

static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)

{

	register unsigned long reg0 asm ("0") = qid;

	register struct ap_queue_status reg1 asm ("1");

	register unsigned long reg2 asm ("2");



	asm volatile(".long 0xb2af0000"		/* PQAP(TAPQ) */

		     : "=d" (reg1), "=d" (reg2)

		     : "d" (reg0)

		     : "cc");

	if (info)

		*info = reg2;

	return reg1;

}



/**

 * ap_pqap_rapq(): Reset adjunct processor queue.

 * @qid: The AP queue number

 *

 * Returns AP queue status structure.

 */

static inline struct ap_queue_status ap_rapq(ap_qid_t qid)

{

	register unsigned long reg0 asm ("0") = qid | (1UL << 24);

	register struct ap_queue_status reg1 asm ("1");



	asm volatile(

		".long 0xb2af0000"		/* PQAP(RAPQ) */

		: "=d" (reg1)

		: "d" (reg0)

		: "cc");

	return reg1;

}



/**

 * ap_pqap_zapq(): Reset and zeroize adjunct processor queue.

 * @qid: The AP queue number

 *

 * Returns AP queue status structure.

 */

static inline struct ap_queue_status ap_zapq(ap_qid_t qid)

{

	register unsigned long reg0 asm ("0") = qid | (2UL << 24);

	register struct ap_queue_status reg1 asm ("1");



	asm volatile(

		".long 0xb2af0000"		/* PQAP(ZAPQ) */

		: "=d" (reg1)

		: "d" (reg0)

		: "cc");

	return reg1;

}



/**

 * ap_aqic(): Control interruption for a specific AP.

 * @qid: The AP queue number

 * @qirqctrl: struct ap_qirq_ctrl (64 bit value)

 * @ind: The notification indicator byte

 *

 * Returns AP queue status.

 */

static inline struct ap_queue_status ap_aqic(ap_qid_t qid,

					     struct ap_qirq_ctrl qirqctrl,

					     void *ind)

{

	register unsigned long reg0 asm ("0") = qid | (3UL << 24);

	register struct ap_qirq_ctrl reg1_in asm ("1") = qirqctrl;

	register struct ap_queue_status reg1_out asm ("1");

	register void *reg2 asm ("2") = ind;



	asm volatile(

		".long 0xb2af0000"		/* PQAP(AQIC) */

		: "=d" (reg1_out)

		: "d" (reg0), "d" (reg1_in), "d" (reg2)

		: "cc");

	return reg1_out;

}



/**

 * ap_qci(): Get AP configuration data

 *

 * Returns 0 on success, or -EOPNOTSUPP.

 */

static inline int ap_qci(void *config)

{

	register unsigned long reg0 asm ("0") = 4UL << 24;

	register unsigned long reg1 asm ("1") = -EINVAL;

	register void *reg2 asm ("2") = (void *) config;



	asm volatile(

		".long 0xb2af0000\n"		/* PQAP(QCI) */

		"0: la    %0,0\n"

		"1:\n"

		EX_TABLE(0b, 1b)

		: "+d" (reg1)

		: "d" (reg0), "d" (reg2)

		: "cc", "memory");



	return reg1;

}



/*

 * union ap_qact_ap_info - used together with the

 * ap_aqic() function to provide a convenient way

 * to handle the ap info needed by the qact function.

 */

union ap_qact_ap_info {

	unsigned long val;

	struct {

		unsigned int	  : 3;

		unsigned int mode : 3;

		unsigned int	  : 26;

		unsigned int cat  : 8;

		unsigned int	  : 8;

		unsigned char ver[2];

	};

};



/**

 * ap_qact(): Query AP combatibility type.

 * @qid: The AP queue number

 * @apinfo: On input the info about the AP queue. On output the

 *	    alternate AP queue info provided by the qact function

 *	    in GR2 is stored in.

 *

 * Returns AP queue status. Check response_code field for failures.

 */

static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,

					     union ap_qact_ap_info *apinfo)

{

	register unsigned long reg0 asm ("0") = qid | (5UL << 24)

		| ((ifbit & 0x01) << 22);

	register unsigned long reg1_in asm ("1") = apinfo->val;

	register struct ap_queue_status reg1_out asm ("1");

	register unsigned long reg2 asm ("2");



	asm volatile(

		".long 0xb2af0000"		/* PQAP(QACT) */

		: "+d" (reg1_in), "=d" (reg1_out), "=d" (reg2)

		: "d" (reg0)

		: "cc");

	apinfo->val = reg2;

	return reg1_out;

}



/**

 * ap_nqap(): Send message to adjunct processor queue.

 * @qid: The AP queue number

 * @psmid: The program supplied message identifier

 * @msg: The message text

 * @length: The message length

 *

 * Returns AP queue status structure.

 * Condition code 1 on NQAP can't happen because the L bit is 1.

 * Condition code 2 on NQAP also means the send is incomplete,

 * because a segment boundary was reached. The NQAP is repeated.

 */

static inline struct ap_queue_status ap_nqap(ap_qid_t qid,

					     unsigned long long psmid,

					     void *msg, size_t length)

{

	register unsigned long reg0 asm ("0") = qid | 0x40000000UL;

	register struct ap_queue_status reg1 asm ("1");

	register unsigned long reg2 asm ("2") = (unsigned long) msg;

	register unsigned long reg3 asm ("3") = (unsigned long) length;

	register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32);

	register unsigned long reg5 asm ("5") = psmid & 0xffffffff;



	asm volatile (

		"0: .long 0xb2ad0042\n"		/* NQAP */

		"   brc   2,0b"

		: "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3)

		: "d" (reg4), "d" (reg5)

		: "cc", "memory");

	return reg1;

}



/**

 * ap_dqap(): Receive message from adjunct processor queue.

 * @qid: The AP queue number

 * @psmid: Pointer to program supplied message identifier

 * @msg: The message text

 * @length: The message length

 *

 * Returns AP queue status structure.

 * Condition code 1 on DQAP means the receive has taken place

 * but only partially.	The response is incomplete, hence the

 * DQAP is repeated.

 * Condition code 2 on DQAP also means the receive is incomplete,

 * this time because a segment boundary was reached. Again, the

 * DQAP is repeated.

 * Note that gpr2 is used by the DQAP instruction to keep track of

 * any 'residual' length, in case the instruction gets interrupted.

 * Hence it gets zeroed before the instruction.

 */

static inline struct ap_queue_status ap_dqap(ap_qid_t qid,

					     unsigned long long *psmid,

					     void *msg, size_t length)

{

	register unsigned long reg0 asm("0") = qid | 0x80000000UL;

	register struct ap_queue_status reg1 asm ("1");

	register unsigned long reg2 asm("2") = 0UL;

	register unsigned long reg4 asm("4") = (unsigned long) msg;

	register unsigned long reg5 asm("5") = (unsigned long) length;

	register unsigned long reg6 asm("6") = 0UL;

	register unsigned long reg7 asm("7") = 0UL;





	asm volatile(

		"0: .long 0xb2ae0064\n"		/* DQAP */

		"   brc   6,0b\n"

		: "+d" (reg0), "=d" (reg1), "+d" (reg2),

		  "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7)

		: : "cc", "memory");

	*psmid = (((unsigned long long) reg6) << 32) + reg7;

	return reg1;

}



#endif /* _AP_ASM_H_ */

drivers/s390/crypto/ap_bus.c

+1 −20
Original line number Diff line number Diff line
@@ -36,7 +36,6 @@ 
#include <linux/debugfs.h>



#include "ap_bus.h"

#include "ap_asm.h"

#include "ap_debug.h"



/*
@@ -174,24 +173,6 @@ static inline int ap_qact_available(void) 
	return 0;

}



/**

 * ap_test_queue(): Test adjunct processor queue.

 * @qid: The AP queue number

 * @tbit: Test facilities bit

 * @info: Pointer to queue descriptor

 *

 * Returns AP queue status structure.

 */

struct ap_queue_status ap_test_queue(ap_qid_t qid,

				     int tbit,

				     unsigned long *info)

{

	if (tbit)

		qid |= 1UL << 23; /* set T bit*/

	return ap_tapq(qid, info);

}

EXPORT_SYMBOL(ap_test_queue);



/*

 * ap_query_configuration(): Fetch cryptographic config info

 *
@@ -200,7 +181,7 @@ EXPORT_SYMBOL(ap_test_queue); 
 * is returned, e.g. if the PQAP(QCI) instruction is not

 * available, the return value will be -EOPNOTSUPP.

 */

int ap_query_configuration(struct ap_config_info *info)

static inline int ap_query_configuration(struct ap_config_info *info)

{

	if (!ap_configuration_available())

		return -EOPNOTSUPP;

drivers/s390/crypto/ap_bus.h

+1 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 


#include <linux/device.h>

#include <linux/types.h>

#include <asm/isc.h>

#include <asm/ap.h>



#define AP_DEVICES 256		/* Number of AP devices. */

drivers/s390/crypto/ap_card.c

+0 −1
Original line number Diff line number Diff line
@@ -14,7 +14,6 @@ 
#include <asm/facility.h>



#include "ap_bus.h"

#include "ap_asm.h"



/*

 * AP card related attributes.