redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

s390/crypto: use basic blocks for ap bus inline assemblies

Browse source 
Use only simple inline assemblies which consist of a single basic
block if the register asm construct is being used.

Otherwise gcc would generate broken code if the compiler option
--sanitize-coverage=trace-pc would be used.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2016-06-20 14:00:27 +02:00 committed by Martin Schwidefsky
parent 931641c639
commit 11d3767303
1 changed files with 49 additions and 28 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

77
drivers/s390/crypto/ap_bus.c
View file

@ -169,6 +169,19 @@ static int ap_configuration_available(void)
return test_facility(12);
}
static inline struct ap_queue_status
__pqap_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") = 0UL;
asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */
: "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc");
*info = reg2;
return reg1;
}
/**
* ap_test_queue(): Test adjunct processor queue.
* @qid: The AP queue number
@ -179,17 +192,15 @@ static int ap_configuration_available(void)
static inline struct ap_queue_status
ap_test_queue(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") = 0UL;
struct ap_queue_status aqs;
unsigned long _info;
if (test_facility(15))
reg0 |= 1UL << 23; /* set APFT T bit*/
asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */
: "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc");
qid |= 1UL << 23; /* set APFT T bit*/
aqs = __pqap_tapq(qid, &_info);
if (info)
*info = reg2;
return reg1;
*info = _info;
return aqs;
}
/**
@ -237,14 +248,12 @@ ap_queue_interruption_control(ap_qid_t qid, void *ind)
*
* Returns 0 on success, or -EOPNOTSUPP.
*/
static inline int ap_query_configuration(void)
static inline int __ap_query_configuration(void)
{
register unsigned long reg0 asm ("0") = 0x04000000UL;
register unsigned long reg1 asm ("1") = -EINVAL;
register void *reg2 asm ("2") = (void *) ap_configuration;
if (!ap_configuration)
return -EOPNOTSUPP;
asm volatile(
".long 0xb2af0000\n" /* PQAP(QCI) */
"0: la %1,0\n"
@ -257,6 +266,13 @@ static inline int ap_query_configuration(void)
return reg1;
}
static inline int ap_query_configuration(void)
{
if (!ap_configuration)
return -EOPNOTSUPP;
return __ap_query_configuration();
}
/**
* ap_init_configuration(): Allocate and query configuration array.
*/
@ -346,6 +362,26 @@ static int ap_queue_enable_interruption(struct ap_device *ap_dev, void *ind)
}
}
static inline struct ap_queue_status
__nqap(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length)
{
typedef struct { char _[length]; } msgblock;
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), "m" (*(msgblock *) msg)
: "cc");
return reg1;
}
/**
* __ap_send(): Send message to adjunct processor queue.
* @qid: The AP queue number
@ -363,24 +399,9 @@ static inline struct ap_queue_status
__ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length,
unsigned int special)
{
typedef struct { char _[length]; } msgblock;
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;
if (special == 1)
reg0 |= 0x400000UL;
asm volatile (
"0: .long 0xb2ad0042\n" /* NQAP */
" brc 2,0b"
: "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3)
: "d" (reg4), "d" (reg5), "m" (*(msgblock *) msg)
: "cc" );
return reg1;
qid |= 0x400000UL;
return __nqap(qid, psmid, msg, length);
}
int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length)