Commit 346d034d authored by Hendrik Brueckner's avatar Hendrik Brueckner Committed by Martin Schwidefsky
Browse files

s390/cpu_mf: replace stcctm5() with the stcctm() function 



Remove the stcctm5() function to extract counters from the MT-diagnostic
counter set with the stcctm() function.  For readability, introduce an
enum to map the counter sets names to respective numbers for the stcctm
instruction.

Signed-off-by: default avatarHendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 778fb10c

arch/s390/include/asm/cpu_mf.h

+9 −16
Original line number Diff line number Diff line
@@ -212,7 +212,15 @@ static inline int ecctr(u64 ctr, u64 *val) 
}



/* Store CPU counter multiple for a particular counter set */

static inline int stcctm(u8 set, u64 range, u64 *dest)

enum stcctm_ctr_set {

	EXTENDED = 0,

	BASIC = 1,

	PROBLEM_STATE = 2,

	CRYPTO_ACTIVITY = 3,

	MT_DIAG = 5,

	MT_DIAG_CLEARING = 9,	/* clears loss-of-MT-ctr-data alert */

};

static inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest)

{

	int cc;
@@ -226,21 +234,6 @@ static inline int stcctm(u8 set, u64 range, u64 *dest) 
	return cc;

}



/* Store CPU counter multiple for the MT utilization counter set */

static inline int stcctm5(u64 num, u64 *val)

{

	int cc;



	asm volatile (

		"	.insn	rsy,0xeb0000000017,%2,5,%1\n"

		"	ipm	%0\n"

		"	srl	%0,28\n"

		: "=d" (cc)

		: "Q" (*val), "d" (num)

		: "cc", "memory");

	return cc;

}



/* Query sampling information */

static inline int qsi(struct hws_qsi_info_block *info)

{

arch/s390/kernel/vtime.c

+2 −2
Original line number Diff line number Diff line
@@ -69,7 +69,7 @@ static void update_mt_scaling(void) 
	u64 delta, fac, mult, div;

	int i;



	stcctm5(smp_cpu_mtid + 1, cycles_new);

	stcctm(MT_DIAG, smp_cpu_mtid + 1, cycles_new);

	cycles_old = this_cpu_ptr(mt_cycles);

	fac = 1;

	mult = div = 0;
@@ -432,6 +432,6 @@ void vtime_init(void) 
		__this_cpu_write(mt_scaling_jiffies, jiffies);

		__this_cpu_write(mt_scaling_mult, 1);

		__this_cpu_write(mt_scaling_div, 1);

		stcctm5(smp_cpu_mtid + 1, this_cpu_ptr(mt_cycles));

		stcctm(MT_DIAG, smp_cpu_mtid + 1, this_cpu_ptr(mt_cycles));

	}

}