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

Selaa lähdekoodia 
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
This commit is contained in:
Linus Torvalds
2019-09-26 11:30:16 -07:00
vanhempi ec56103e18 ab57588480
commit 16cdf08467
14 muutettua tiedostoa jossa 334 lisäystä ja 82 poistoa
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10
arch/s390/include/asm/cpu_mf.h
Näytä tiedosto

@@ -70,7 +70,7 @@ struct hws_qsi_info_block { /* Bit(s) */
unsigned long tear; /* 24-31: TEAR contents */
unsigned long dear; /* 32-39: DEAR contents */
unsigned int rsvrd0; /* 40-43: reserved */
unsigned int cpu_speed; /* 44-47: CPU speed */
unsigned int cpu_speed; /* 44-47: CPU speed */
unsigned long long rsvrd1; /* 48-55: reserved */
unsigned long long rsvrd2; /* 56-63: reserved */
} __packed;
@@ -89,10 +89,10 @@ struct hws_lsctl_request_block {
unsigned long tear; /* 16-23: TEAR contents */
unsigned long dear; /* 24-31: DEAR contents */
/* 32-63: */
unsigned long rsvrd1; /* reserved */
unsigned long rsvrd2; /* reserved */
unsigned long rsvrd3; /* reserved */
unsigned long rsvrd4; /* reserved */
unsigned long rsvrd1; /* reserved */
unsigned long rsvrd2; /* reserved */
unsigned long rsvrd3; /* reserved */
unsigned long rsvrd4; /* reserved */
} __packed;
struct hws_basic_entry {

2
arch/s390/include/asm/perf_event.h
Näytä tiedosto

@@ -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 */

4
arch/s390/include/uapi/asm/zcrypt.h
Näytä tiedosto

@@ -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

165
arch/s390/kernel/perf_cpum_sf.c
Näytä tiedosto

@@ -673,13 +673,89 @@ out:
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");
goto out;
}
}
SAMPL_RATE(hwc) = rate;
hw_init_period(hwc, SAMPL_RATE(hwc));
err = __hw_perf_event_init_rate(event, &si);
if (err)
goto out;
/* 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,

3
arch/s390/kernel/topology.c
Näytä tiedosto

@@ -311,7 +311,8 @@ 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);
kobject_uevent(&dev->kobj, KOBJ_CHANGE);
if (dev)
kobject_uevent(&dev->kobj, KOBJ_CHANGE);
}
return rc;
}