BMC/Intel-BMC/linux.git/arch/s390/include/asm/perf_event.h, branch dev

s390/oprofile: fix compile error

2015-07-01T07:34:39+00:00

Fix these errors when compiling with CONFIG_OPROFILE=y and CONFIG_PERF_EVENTS=n: arch/s390/oprofile/init.c: In function ‘oprofile_hwsampler_start’: arch/s390/oprofile/init.c:93:2: error: implicit declaration of function 'perf_reserve_sampling' [-Werror=implicit-function-declaration] retval = perf_reserve_sampling(); ^ arch/s390/oprofile/init.c:99:3: error: implicit declaration of function 'perf_release_sampling' [-Werror=implicit-function-declaration] perf_release_sampling(); ^ Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky

s390: remove 31 bit support

2015-03-25T10:49:33+00:00

Remove the 31 bit support in order to reduce maintenance cost and effectively remove dead code. Since a couple of years there is no distribution left that comes with a 31 bit kernel. The 31 bit kernel also has been broken since more than a year before anybody noticed. In addition I added a removal warning to the kernel shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning message") which let everybody know about the plan to remove 31 bit code. We didn't get any response. Given that the last 31 bit only machine was introduced in 1999 let's remove the code. Anybody with 31 bit user space code can still use the compat mode. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/cpum_sf: Add flag to process full SDBs only

2013-12-16T13:38:01+00:00

Add the PERF_CPUM_SF_FULL_BLOCKS flag to process only sample-data-blocks that have the block-full-indicator bit set. Sample-data-blocks that are partially filled are discarded. Use this flag if the sampling buffer is likely to be shared among perf events that use different sampling modes. In such environments, flushing sample-data-blocks that are not completely filled, might cause invalid-data-formats. Setting PERF_CPUM_SF_FULL_BLOCKS prevents potentially invalid sampling data to be processed but, in contrast, also discards valid samples in partially filled sample-data-blocks. Note that sample-data-blocks might not become full for small sampling frequencies or for workload that is scheduled for tiny intervals. To sample with the PERF_CPUM_SF_FULL_BLOCKS flag, set the perf->attr.config1 to 0x0004. For example: perf record -e cpum_sf/config=0xB000,config1=0x0004/ Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

s390/cpum_sf: Add raw data sampling to support the diagnostic-sampling function

2013-12-16T13:38:00+00:00

Also support the diagnostic-sampling function in addition to the basic-sampling function. Diagnostic-sampling data entries contain hardware model specific sampling data and additional programs are required to analyze the data. To deliver diagnostic-sampling, as well, as basis-sampling data entries to user space, introduce support for sampling "raw data". If this particular perf sampling type (PERF_SAMPLE_RAW) is used, sampling data entries are copied to user space. External programs can then analyze these data. Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

s390/cpum_sf: Detect KVM guest samples

2013-12-16T13:37:59+00:00

The host-program-parameter (hpp) value of basic sample-data-entries designates a SIE control block that is set by the LPP instruction in sie64a(). Non-zero values indicate guest samples, a value of zero indicates a host sample. For perf samples, host and guest samples are distinguished using particular PERF_MISC_* flags. The perf layer calls perf_misc_flags() to set the flags based on the pt_regs content. For each sample-data-entry, the cpum_sf PMU creates a pt_regs structure with the sample-data information. An additional flag structure is added to easily distinguish between host and guest samples. Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

s390/cpum_sf: Dynamically extend the sampling buffer if overflows occur

2013-12-16T13:37:57+00:00

Improve the sampling buffer allocation and add a function to reallocate and increase the sampling buffer structure. The number of allocated buffer elements (sample-data-blocks) are accounted. You can control the minimum and maximum number these sample-data-blocks through the cpum_sfb_size kernel parameter. The number hardware sample overflows (if any) are also accounted and stored per perf event. During the PMU disable/enable calls, the accumulated overflow counter is analyzed and, if necessary, the sampling buffer is dynamically increased. Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

s390/perf,oprofile: Share sampling facility

2013-12-16T13:37:52+00:00

Introduce reserve/release functions to share the sampling facility between perf and oprofile. Also improve error handling for the sampling facility support in perf. Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

s390/perf: add support for the CPU-Measurement Sampling Facility

2013-12-16T13:37:51+00:00

Introduce a perf PMU, "cpum_sf", to support the CPU-Measurement Sampling Facility. You can control the sampling facility through this perf PMU interfaces. Perf sampling events are created for hardware samples. For details about the CPU-Measurement Sampling Facility, see "The Load-Program-Parameter and the CPU-Measurement Facilities" (SA23-2260). Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

s390/cpum_cf: Export event names in sysfs

2013-12-16T13:37:50+00:00

Provide PMU event attributes for supported counters and export their symbolic names to the sysfs "events" directory. See the /sys/devices/cpum_cf/events/ directory for a list of available counters. Note that you might require counter set authorizations for the LPAR to use them. Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

KVM: s390,perf: Detect if perf samples belong to KVM host or guest

2013-06-17T15:10:23+00:00

This patch is based on an original patch of David Hildenbrand. The perf core implementation calls architecture specific code in order to ask for specific information for a particular sample: perf_instruction_pointer() When perf core code asks for the instruction pointer, architecture specific code must detect if a KVM guest was running when the sample was taken. A sample can be associated with a KVM guest when the PSW supervisor state bit is set and the PSW instruction pointer part contains the address of 'sie_exit'. A KVM guest's instruction pointer information is then retrieved via gpsw entry pointed to by the sie control-block. perf_misc_flags() perf code code calls this function in order to associate the kernel vs. user state infomation with a particular sample. Architecture specific code must also first detectif a KVM guest was running at the time the sample was taken. Signed-off-by: Heinz Graalfs Reviewed-by: Hendrik Brueckner Signed-off-by: Christian Borntraeger Signed-off-by: Cornelia Huck Signed-off-by: Paolo Bonzini