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Commit 16cdf084 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 's390-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull more s390 updates from Vasily Gorbik:

 - Fix three kasan findings

 - Add PERF_EVENT_IOC_PERIOD ioctl support

 - Add Crypto Express7S support and extend sysfs attributes for pkey

 - Minor common I/O layer documentation corrections

* tag 's390-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cio: exclude subchannels with no parent from pseudo check
  s390/cio: avoid calling strlen on null pointer
  s390/topology: avoid firing events before kobjs are created
  s390/cpumf: Remove mixed white space
  s390/cpum_sf: Support ioctl PERF_EVENT_IOC_PERIOD
  s390/zcrypt: CEX7S exploitation support
  s390/cio: fix intparm documentation
  s390/pkey: Add sysfs attributes to emit AES CIPHER key blobs
parents ec56103e ab575884

arch/s390/include/asm/perf_event.h

+2 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ struct perf_sf_sde_regs { 
#define PERF_CPUM_SF_MODE_MASK		(PERF_CPUM_SF_BASIC_MODE| \

					 PERF_CPUM_SF_DIAG_MODE)

#define PERF_CPUM_SF_FULL_BLOCKS	0x0004	  /* Process full SDBs only */

#define PERF_CPUM_SF_FREQ_MODE		0x0008	  /* Sampling with frequency */



#define REG_NONE		0

#define REG_OVERFLOW		1
@@ -70,5 +71,6 @@ struct perf_sf_sde_regs { 
#define SAMPL_FLAGS(hwc)	((hwc)->config_base)

#define SAMPL_DIAG_MODE(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)

#define SDB_FULL_BLOCKS(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)

#define SAMPLE_FREQ_MODE(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE)



#endif /* _ASM_S390_PERF_EVENT_H */

arch/s390/include/uapi/asm/zcrypt.h

+2 −2
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 
 *

 *  zcrypt 2.2.1 (user-visible header)

 *

 *  Copyright IBM Corp. 2001, 2018

 *  Copyright IBM Corp. 2001, 2019

 *  Author(s): Robert Burroughs

 *	       Eric Rossman (edrossma@us.ibm.com)

 *
@@ -286,7 +286,7 @@ struct zcrypt_device_matrix_ext { 
 *	 0x08: CEX3A

 *	 0x0a: CEX4

 *	 0x0b: CEX5

 *	 0x0c: CEX6

 *	 0x0c: CEX6 and CEX7

 *	 0x0d: device is disabled

 *

 *   ZCRYPT_QDEPTH_MASK

arch/s390/kernel/perf_cpum_sf.c

+125 −40
Original line number Diff line number Diff line
@@ -673,13 +673,89 @@ static void cpumsf_output_event_pid(struct perf_event *event, 
	rcu_read_unlock();

}



static unsigned long getrate(bool freq, unsigned long sample,

			     struct hws_qsi_info_block *si)

{

	unsigned long rate;



	if (freq) {

		rate = freq_to_sample_rate(si, sample);

		rate = hw_limit_rate(si, rate);

	} else {

		/* The min/max sampling rates specifies the valid range

		 * of sample periods.  If the specified sample period is

		 * out of range, limit the period to the range boundary.

		 */

		rate = hw_limit_rate(si, sample);



		/* The perf core maintains a maximum sample rate that is

		 * configurable through the sysctl interface.  Ensure the

		 * sampling rate does not exceed this value.  This also helps

		 * to avoid throttling when pushing samples with

		 * perf_event_overflow().

		 */

		if (sample_rate_to_freq(si, rate) >

		    sysctl_perf_event_sample_rate) {

			debug_sprintf_event(sfdbg, 1,

					    "Sampling rate exceeds maximum "

					    "perf sample rate\n");

			rate = 0;

		}

	}

	return rate;

}



/* The sampling information (si) contains information about the

 * min/max sampling intervals and the CPU speed.  So calculate the

 * correct sampling interval and avoid the whole period adjust

 * feedback loop.

 *

 * Since the CPU Measurement sampling facility can not handle frequency

 * calculate the sampling interval when frequency is specified using

 * this formula:

 *	interval := cpu_speed * 1000000 / sample_freq

 *

 * Returns errno on bad input and zero on success with parameter interval

 * set to the correct sampling rate.

 *

 * Note: This function turns off freq bit to avoid calling function

 * perf_adjust_period(). This causes frequency adjustment in the common

 * code part which causes tremendous variations in the counter values.

 */

static int __hw_perf_event_init_rate(struct perf_event *event,

				     struct hws_qsi_info_block *si)

{

	struct perf_event_attr *attr = &event->attr;

	struct hw_perf_event *hwc = &event->hw;

	unsigned long rate;



	if (attr->freq) {

		if (!attr->sample_freq)

			return -EINVAL;

		rate = getrate(attr->freq, attr->sample_freq, si);

		attr->freq = 0;		/* Don't call  perf_adjust_period() */

		SAMPL_FLAGS(hwc) |= PERF_CPUM_SF_FREQ_MODE;

	} else {

		rate = getrate(attr->freq, attr->sample_period, si);

		if (!rate)

			return -EINVAL;

	}

	attr->sample_period = rate;

	SAMPL_RATE(hwc) = rate;

	hw_init_period(hwc, SAMPL_RATE(hwc));

	debug_sprintf_event(sfdbg, 4, "__hw_perf_event_init_rate:"

			    "cpu:%d period:%llx freq:%d,%#lx\n", event->cpu,

			    event->attr.sample_period, event->attr.freq,

			    SAMPLE_FREQ_MODE(hwc));

	return 0;

}



static int __hw_perf_event_init(struct perf_event *event)

{

	struct cpu_hw_sf *cpuhw;

	struct hws_qsi_info_block si;

	struct perf_event_attr *attr = &event->attr;

	struct hw_perf_event *hwc = &event->hw;

	unsigned long rate;

	int cpu, err;



	/* Reserve CPU-measurement sampling facility */
@@ -745,43 +821,9 @@ static int __hw_perf_event_init(struct perf_event *event) 
	if (attr->config1 & PERF_CPUM_SF_FULL_BLOCKS)

		SAMPL_FLAGS(hwc) |= PERF_CPUM_SF_FULL_BLOCKS;



	/* The sampling information (si) contains information about the

	 * min/max sampling intervals and the CPU speed.  So calculate the

	 * correct sampling interval and avoid the whole period adjust

	 * feedback loop.

	 */

	rate = 0;

	if (attr->freq) {

		if (!attr->sample_freq) {

			err = -EINVAL;

			goto out;

		}

		rate = freq_to_sample_rate(&si, attr->sample_freq);

		rate = hw_limit_rate(&si, rate);

		attr->freq = 0;

		attr->sample_period = rate;

	} else {

		/* The min/max sampling rates specifies the valid range

		 * of sample periods.  If the specified sample period is

		 * out of range, limit the period to the range boundary.

		 */

		rate = hw_limit_rate(&si, hwc->sample_period);



		/* The perf core maintains a maximum sample rate that is

		 * configurable through the sysctl interface.  Ensure the

		 * sampling rate does not exceed this value.  This also helps

		 * to avoid throttling when pushing samples with

		 * perf_event_overflow().

		 */

		if (sample_rate_to_freq(&si, rate) >

		      sysctl_perf_event_sample_rate) {

			err = -EINVAL;

			debug_sprintf_event(sfdbg, 1, "Sampling rate exceeds maximum perf sample rate\n");

	err =  __hw_perf_event_init_rate(event, &si);

	if (err)

		goto out;

		}

	}

	SAMPL_RATE(hwc) = rate;

	hw_init_period(hwc, SAMPL_RATE(hwc));



	/* Initialize sample data overflow accounting */

	hwc->extra_reg.reg = REG_OVERFLOW;
@@ -904,6 +946,8 @@ static void cpumsf_pmu_enable(struct pmu *pmu) 
			if (sfb_has_pending_allocs(&cpuhw->sfb, hwc))

				extend_sampling_buffer(&cpuhw->sfb, hwc);

		}

		/* Rate may be adjusted with ioctl() */

		cpuhw->lsctl.interval = SAMPL_RATE(&cpuhw->event->hw);

	}



	/* (Re)enable the PMU and sampling facility */
@@ -922,8 +966,9 @@ static void cpumsf_pmu_enable(struct pmu *pmu) 
	lpp(&S390_lowcore.lpp);



	debug_sprintf_event(sfdbg, 6, "pmu_enable: es=%i cs=%i ed=%i cd=%i "

			    "tear=%p dear=%p\n", cpuhw->lsctl.es,

			    cpuhw->lsctl.cs, cpuhw->lsctl.ed, cpuhw->lsctl.cd,

			    "interval:%lx tear=%p dear=%p\n",

			    cpuhw->lsctl.es, cpuhw->lsctl.cs, cpuhw->lsctl.ed,

			    cpuhw->lsctl.cd, cpuhw->lsctl.interval,

			    (void *) cpuhw->lsctl.tear,

			    (void *) cpuhw->lsctl.dear);

}
@@ -1717,6 +1762,44 @@ static void cpumsf_pmu_read(struct perf_event *event) 
	/* Nothing to do ... updates are interrupt-driven */

}



/* Check if the new sampling period/freqeuncy is appropriate.

 *

 * Return non-zero on error and zero on passed checks.

 */

static int cpumsf_pmu_check_period(struct perf_event *event, u64 value)

{

	struct hws_qsi_info_block si;

	unsigned long rate;

	bool do_freq;



	memset(&si, 0, sizeof(si));

	if (event->cpu == -1) {

		if (qsi(&si))

			return -ENODEV;

	} else {

		/* Event is pinned to a particular CPU, retrieve the per-CPU

		 * sampling structure for accessing the CPU-specific QSI.

		 */

		struct cpu_hw_sf *cpuhw = &per_cpu(cpu_hw_sf, event->cpu);



		si = cpuhw->qsi;

	}



	do_freq = !!SAMPLE_FREQ_MODE(&event->hw);

	rate = getrate(do_freq, value, &si);

	if (!rate)

		return -EINVAL;



	event->attr.sample_period = rate;

	SAMPL_RATE(&event->hw) = rate;

	hw_init_period(&event->hw, SAMPL_RATE(&event->hw));

	debug_sprintf_event(sfdbg, 4, "cpumsf_pmu_check_period:"

			    "cpu:%d value:%llx period:%llx freq:%d\n",

			    event->cpu, value,

			    event->attr.sample_period, do_freq);

	return 0;

}



/* Activate sampling control.

 * Next call of pmu_enable() starts sampling.

 */
@@ -1908,6 +1991,8 @@ static struct pmu cpumf_sampling = { 


	.setup_aux    = aux_buffer_setup,

	.free_aux     = aux_buffer_free,



	.check_period = cpumsf_pmu_check_period,

};



static void cpumf_measurement_alert(struct ext_code ext_code,

arch/s390/kernel/topology.c

+2 −1
Original line number Diff line number Diff line
@@ -311,6 +311,7 @@ int arch_update_cpu_topology(void) 
	on_each_cpu(__arch_update_dedicated_flag, NULL, 0);

	for_each_online_cpu(cpu) {

		dev = get_cpu_device(cpu);

		if (dev)

			kobject_uevent(&dev->kobj, KOBJ_CHANGE);

	}

	return rc;

drivers/s390/cio/ccwgroup.c

+1 −1
Original line number Diff line number Diff line
@@ -372,7 +372,7 @@ int ccwgroup_create_dev(struct device *parent, struct ccwgroup_driver *gdrv, 
		goto error;

	}

	/* Check for trailing stuff. */

	if (i == num_devices && strlen(buf) > 0) {

	if (i == num_devices && buf && strlen(buf) > 0) {

		rc = -EINVAL;

		goto error;

	}