[Skiboot] [PATCH v9 06/11] skiboot: Nest IMC macro definitions
Anju T Sudhakar
anju at linux.vnet.ibm.com
Thu Apr 27 06:36:56 AEST 2017
From: Hemant Kumar <hemant at linux.vnet.ibm.com>
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.
Signed-off-by: Hemant Kumar <hemant at linux.vnet.ibm.com>
Reviewed-by: Oliver O'Halloran <oohall at gmail.com>
[maddy: Removed nest_imc.h and updated few macros]
Signed-off-by: Madhavan Srinivasan <maddy at linux.vnet.ibm.com>
[changed NEST_IMC_RESUME to NEST_IMC_RUNNING]
Signed-off-by: Anju T Sudhakar <anju at linux.vnet.ibm.com>
include/imc.h | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 118 insertions(+)
create mode 100644 include/imc.h
diff --git a/include/imc.h b/include/imc.h
new file mode 100644
@@ -0,0 +1,118 @@
+/* Copyright 2016 IBM Corp.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * IMC (In-Memory Collection) :
+ * Power9 has IMC instrumentation support with which several metrics of the
+ * platform can be monitored. These metrics are backed by the
+ * Performance Monitoring Units (PMUs) and their counters.
+ * IMC counters run continuously from startup to shutdown and hence, the
+ * name and data from these counters are fed directly into a pre-defined
+ * memory location.
+ * Depending on the counters' location and monitoring engines, they are
+ * classified into three domains :
+ * Nest IMC, core IMC and thread IMC.
+ * Nest Counters :
+ * Nest counters are per-chip counters and can help in providing utilisation
+ * metrics like memory bandwidth, Xlink/Alink bandwidth etc.
+ * A microcode in OCC programs the nest counters and moves counter values to
+ * per chip HOMER region in a fixed offset for each unit. Engine has a
+ * control block structure for communication with Hypervisor(Host OS).
+ * Control Block structure offset in HOMER nest Region
+#define P9_CB_STRUCT_OFFSET 0x1BFC00
+#define P9_CB_STRUCT_CMD 0x1BFC08
+#define P9_CB_STRUCT_SPEED 0x1BFC10
+/* Nest microcode Status */
+#define NEST_IMC_PAUSE 0x2
+#define NEST_IMC_RUNNING 0x1
+#define NEST_IMC_NOP 0
+ * Control Block Structure:
+ * Name Producer Consumer Values Desc
+ * IMCRunStatus IMC Code Hypervisor 0 Initializing
+ * (Host OS) 1 Running
+ * 2 Paused
+ * IMCCommand Hypervisor IMC Code 0 NOP
+ * 1 Resume
+ * 2 Pause
+ * 3 Clear and Restart
+ * IMCCollection Hypervisor IMC Code 0 128us
+ * Speed 1 256us
+ * 2 1ms
+ * 3 4ms
+ * 4 16ms
+ * 5 64ms
+ * 6 256ms
+ * 7 1000ms
+ * IMCAvailability IMC Code Hypervisor - 64-bit value describes
+ * the Vector Nest PMU
+ * availability.
+ * Bits 0-47 denote the
+ * availability of 48 different
+ * nest units.
+ * Rest are reserved. For details
+ * regarding which bit belongs
+ * to which unit, see
+ * include/nest_imc.h.
+ * If a bit is unset (0),
+ * then, the corresponding unit
+ * is unavailable. If its set (1),
+ * then, the unit is available.
+ * IMCRun Mode Hypervisor IMC Code 0 Normal Mode (Monitor Mode)
+ * 1 Debug Mode 1 (PB)
+ * 2 Debug Mode 2 (MEM)
+ * 3 Debug Mode 3 (PCIE)
+ * 4 Debug Mode 4 (CAPP)
+ * 5 Debug Mode 5 (NPU 1)
+ * 6 Debug Mode 6 (NPU 2)
+ u64 imc_chip_run_status;
+ u64 imc_chip_command;
+ u64 imc_chip_collection_speed;
+ u64 imc_chip_avl_vector;
+ u64 imc_chip_run_mode;
+/* Size of IMC dtb LID (256KBytes) */
+#define IMC_DTB_SIZE 0x40000
+ * Nest IMC operations
+#define NEST_IMC_ENABLE 0x1
+#define NEST_IMC_DISABLE 0x2
+#define MAX_AVL 48
+#endif /* __IMC_H */
More information about the Skiboot