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| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | 2017-07-19 00:36:33 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-07-25 15:55:27 +0300 |
| commit | 8f95faaac56c18b32d0e23ace55417a440abdb7e (patch) | |
| tree | cfc36a3fb718296b460ad9e1d5f5652a150a359c /arch/powerpc/platforms/powernv/opal.c | |
| parent | 28a5db0061014c8afbbb98560cf420c29bc4d8e1 (diff) | |
| download | linux-8f95faaac56c18b32d0e23ace55417a440abdb7e.tar.xz | |
powerpc/powernv: Detect and create IMC device
Code to create platform device for the In-Memory Collection (IMC)
counters. Platform devices are created based on the IMC compatibility.
New header file created to contain the data structures and macros
needed for In-Memory Collection (IMC) counter pmu devices.
The device tree for IMC counters starts at the node "imc-counters".
This node contains all the IMC PMU nodes and event nodes for these IMC
PMUs. Device probe() parses the device to locate three possible IMC
device types (Nest/Core/Thread). Function then branch to parse each
unit nodes to populate vital information such as device memory sizes,
event nodes information, base address for reserve memory access (if
any) and so on. Simple bare-minimum shutdown function added which only
"stops" the engines.
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
[mpe: Fix build with CONFIG_PERF_EVENTS=n]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index cad6b57ce494..946158e6fc1d 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -16,6 +16,7 @@ #include <linux/of.h> #include <linux/of_fdt.h> #include <linux/of_platform.h> +#include <linux/of_address.h> #include <linux/interrupt.h> #include <linux/notifier.h> #include <linux/slab.h> @@ -30,6 +31,7 @@ #include <asm/opal.h> #include <asm/firmware.h> #include <asm/mce.h> +#include <asm/imc-pmu.h> #include "powernv.h" @@ -720,6 +722,15 @@ static void opal_pdev_init(const char *compatible) of_platform_device_create(np, NULL, NULL); } +static void __init opal_imc_init_dev(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, IMC_DTB_COMPAT); + if (np) + of_platform_device_create(np, NULL, NULL); +} + static int kopald(void *unused) { unsigned long timeout = msecs_to_jiffies(opal_heartbeat) + 1; @@ -793,6 +804,9 @@ static int __init opal_init(void) /* Setup a heatbeat thread if requested by OPAL */ opal_init_heartbeat(); + /* Detect In-Memory Collection counters and create devices*/ + opal_imc_init_dev(); + /* Create leds platform devices */ leds = of_find_node_by_path("/ibm,opal/leds"); if (leds) { |