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Use Software Package Data Exchange (SPDX) to indicate license for each
file that is unique to skiboot.
At the same time, ensure the (C) who and years are correct.
See https://spdx.org/
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
[oliver: Added a few missing files]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
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hw/imc.c:188:46: warning: incorrect type in assignment (different base types)
hw/imc.c:188:46: expected unsigned long long [usertype] imc_chip_command
hw/imc.c:188:46: got restricted beint64_t
hw/imc.c:370:41: warning: incorrect type in argument 1 (different base types)
hw/imc.c:370:41: expected restricted beint64_t [usertype] be_val
hw/imc.c:370:41: got unsigned long long [usertype] imc_chip_avl_vector
hw/imc.c:833:38: warning: incorrect type in assignment (different base types)
hw/imc.c:833:38: expected unsigned long long [usertype] imc_chip_command
hw/imc.c:833:38: got restricted beint64_t
hw/imc.c:894:38: warning: incorrect type in assignment (different base types)
hw/imc.c:894:38: expected unsigned long long [usertype] imc_chip_command
hw/imc.c:894:38: got restricted beint64_t
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
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Add macros needed for Trace mode enablement of IMC(In-Memory
Collection Counters). These macros are used to identify the
trace node in the device-tree and to make appropriate scom calls
to enable trace-mode in the hardware.
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
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In-Memory Collection(IMC) counters catalog is compressed blob which is
loaded from the flash; decompression starts once the data is loaded from
nvram by the main thread. This can be optimized by using the libxz API
function which creates a job to do the decompression by not blocking the
main thread.
Refactor decompress() to use the libxz asynchronous wrapper
functions. This also cleans up the error handling path in imc_init().
CC: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
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disable_unavailable_units() loops through nest_pmus array
to filter out the unsupported nest units from the imc
catalog dtb. Current code use a static macro ('MAX_NEST_UNITS')
for array limit, instead use ARRAY_SIZE. This will avoid updates
to static macro when updating the nest_pmus array.
Fixes: 712837cedca06 ('skiboot/imc: Update the nest_pmus array with occ/gpe microcode uav updates')
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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CORE_IMC_EVENT_MASK is a scom that contains bits to control event sampling for
different machine state for core imc. The current event-mask setting sample
events only on host kernel (hypervisor) and host userspace.
Patch to enable the sampling of events in other machine states (like guest
kernel and guest userspace).
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Add code to detect combined unit nodes
in the imc device tree. Due to HW/OCC restriction
mcs* units are paired and monitored by the nest
microcode. Microcode today does not support monitoring
of individual mcs* unit events, so the patch first
remove these mcs* from the imc device tree if found.
Secondly to enable or disbale combined units nodes like
"mcs01", "mcs23","mcs45" and "mcs67", additional parser
loop is added to disable_unavailable_units().
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Add new opal calls to init, start and stop the IMC nest/core units.
To initialize the core IMC counters, it takes a physical address per
core as an input and writes that address to PDBAR[14:50] bits.
It initializes the htm_mode and event_mask, where it selects the time
interval at which the counter values must be posted to the given memory
location and enables the counters to start running by setting the
appropriate bits.
To disable/enable the nest IMC counters (stop or resume counting),
writes into "command" field of the nest control block in the reserve
memory location. To disable/enable the core IMC counters (stop or
resume counting), writes into appropriate bits of htm_mode to
disable the counters.
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
[stewart@linux.vnet.ibm.com: use pr_fmt rather than hardcode IMC prefix]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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IMC (In Memory Collection) catalog is a repository of information
about the Performance Monitoring Units (PMUs) and their events under
the IMC infrastructure. The information include :
- The PMU names
- Event names
- Event description
- Event offsets
- Event scale
- Event unit
The catalog is provided as a flattened device tree (dtb). Processors
with different PVR values may have different PMU or event names. Hence,
for each processor, there can be multiple device tree binaries (dtbs)
containing the IMC information. Each of the dtb is compressed and forms
a sub-partition inside the PNOR partition "IMA_CATALOG". Here is a link
to the commit adding this partition to PNOR :
https://github.com/open-power/pnor/commit/c940142c6dc64dd176096dc648f433c889919e84
So, each compressed dtb forms a sub-partition inside the IMC pnor
partition and can be accessed/loaded through a sub-partition id which
is nothing but the PVR id. Based on the current processor's PVR, the
appropriate sub-partion will be loaded.
Note however, that the catalog information is in the form of a dtb and
the dtb is compressed too. So, the sub-partition loaded must be
decompressed first before we can actually use it.
It is important to mention here that while a PNOR image built for one
processor is specific to only that processor and isn't portable, a
single system generation (Processor version) may have multiple revisions
and these revisions may have some changes in their IMC PMUs and events,
and hence, the need for multiple IMC DTBs.
The sub-partition that we obtain from the IMC pnor partition is a
compressed device tree binary. We uncompress it using the libxz's
functions. After uncompressing it, we link the device tree binary to the
system's device tree. The kernel can now access the device tree and get
the IMC PMUs and their events' information.
Not all the IMC PMUs listed in the device tree may be available. This is
indicated by imc availability vector (which is a part of the IMC control
block structure). We need to check this vector and make sure to remove
the IMC device nodes which are unavailable.
Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
[stewart@linux.vnet.ibm.com: use pr_fmt, fix failure path for resource load]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Add the macros needed for Nest IMC (In Memory Collection)
instrumentation support by creating a new file in include/ called
"imc.h". Also, add a header "nest_imc.h" containing an array of
possible list of nest PMUs. These macros are needed to discover the
catalog subpartition, enable and disable the nest IMC instrumentation.
Acked-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
[Anju: changed NEST_IMC_RESUME to NEST_IMC_RUNNING]
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
[maddy: Removed nest_imc.h and updated few macros]
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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