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Groups > linux.kernel > #1470446
| From | Mathieu Poirier <mathieu.poirier@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 25/28] coresight: etm4x: adding range filter configuration function |
| Date | 2016-08-25 23:30 +0200 |
| Message-ID | <saanM-6sR-53@gated-at.bofh.it> (permalink) |
| References | <saanL-6sR-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Introducing a new function to do address range configuration
generic enough to work for any address range and any comparator.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/coresight-etm4x.c | 56 ++++++++++++++++++---------
1 file changed, 38 insertions(+), 18 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index 04462fffe8e4..aca624010b9f 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -581,16 +581,10 @@ static void etm4_set_default_config(struct etmv4_config *config)
config->vinst_ctrl |= BIT(0);
}
-static void etm4_set_default_filter(struct etmv4_config *config)
+static void etm4_set_comparator_filter(struct etmv4_config *config,
+ u64 start, u64 stop, int comparator)
{
- u64 start, stop, access_type = 0;
-
- /*
- * Configure address range comparator '0' to encompass all
- * possible addresses.
- */
- start = 0x0;
- stop = ~0x0;
+ u64 access_type = 0;
/* EXLEVEL_NS, bits[12:15], always stay away from hypervisor mode. */
access_type = ETM_EXLEVEL_NS_HYP;
@@ -604,20 +598,46 @@ static void etm4_set_default_filter(struct etmv4_config *config)
ETM_EXLEVEL_S_HYP);
/* First half of default address comparator */
- config->addr_val[ETM_DEFAULT_ADDR_COMP] = start;
- config->addr_acc[ETM_DEFAULT_ADDR_COMP] = access_type;
- config->addr_type[ETM_DEFAULT_ADDR_COMP] = ETM_ADDR_TYPE_RANGE;
+ config->addr_val[comparator] = start;
+ config->addr_acc[comparator] = access_type;
+ config->addr_type[comparator] = ETM_ADDR_TYPE_RANGE;
/* Second half of default address comparator */
- config->addr_val[ETM_DEFAULT_ADDR_COMP + 1] = stop;
- config->addr_acc[ETM_DEFAULT_ADDR_COMP + 1] = access_type;
- config->addr_type[ETM_DEFAULT_ADDR_COMP + 1] = ETM_ADDR_TYPE_RANGE;
+ config->addr_val[comparator + 1] = stop;
+ config->addr_acc[comparator + 1] = access_type;
+ config->addr_type[comparator + 1] = ETM_ADDR_TYPE_RANGE;
+
+ /*
+ * Configure the ViewInst function to include this address range
+ * comparator.
+ *
+ * @comparator is divided by two since it is the index in the
+ * etmv4_config::addr_val array but register TRCVIIECTLR deals with
+ * address range comparator _pairs_.
+ *
+ * Therefore:
+ * index 0 -> compatator pair 0
+ * index 2 -> comparator pair 1
+ * index 4 -> comparator pair 2
+ * ...
+ * index 14 -> comparator pair 7
+ */
+ config->viiectlr |= BIT(comparator / 2);
+}
+
+static void etm4_set_default_filter(struct etmv4_config *config)
+{
+ u64 start, stop;
/*
- * Configure the ViewInst function to filter on address range
- * comparator '0'.
+ * Configure address range comparator '0' to encompass all
+ * possible addresses.
*/
- config->viiectlr = BIT(0);
+ start = 0x0;
+ stop = ~0x0;
+
+ etm4_set_comparator_filter(config, start, stop,
+ ETM_DEFAULT_ADDR_COMP);
/*
* TRCVICTLR::SSSTATUS == 1, the start-stop logic is
--
2.7.4
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[PATCH 00/28] coresight: next v4.8-rc3 Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 20/28] coresight: etm-perf: pass struct perf_event to source::enable/disable() Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 03/28] coresight: always use stashed trace id value in etm4_trace_id Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 21/28] coresight: remove duplicated enumeration Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 02/28] coresight-stm: support mmapping channel regions with mmio_addr Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 26/28] coresight: etm4x: configuring include/exclude function Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 17/28] coresight: tmc: Delete an unnecessary check before the function call "kfree" Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 24/28] coresight: etm4x: cleaning up default filter configuration Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 04/28] coresight: Remove erroneous dma_free_coherent in tmc_probe Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 09/28] coresight: Cleanup TMC status check Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 28/28] coresight: etm4x: adding configurable start/stop filtering Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 08/28] coresight: etmv4: Fix ETMv4x peripheral ID table Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 25/28] coresight: etm4x: adding range filter configuration function Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:30 +0200 [PATCH 16/28] coresight: etm4x: remove duplicated include from coresight-etm4x.c Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:40 +0200 [PATCH 10/28] coresight: Add better messages for coresight_timeout Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:40 +0200 [PATCH 14/28] hwtracing: coresight: of_coresight: add missing of_node_put after calling of_parse_phandle Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:40 +0200 [PATCH 15/28] coresight: Use local coresight_desc instances Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:40 +0200 [PATCH 13/28] coresight-etm3x: Add ARM ETM 3.5 Cortex-A5 peripheral ID Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:40 +0200 [PATCH 11/28] coresight: delay initialisation when children are missing Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:50 +0200 [PATCH 12/28] coresight: add PM runtime calls to coresight_simple_func() Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:50 +0200 [PATCH 06/28] coresight: Fix csdev connections initialisation Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:50 +0200 [PATCH 23/28] coresight: etm4x: split default and filter configuration Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-25 23:50 +0200 [PATCH 07/28] coresight: tmc: Limit the trace to available data Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-26 00:00 +0200 [PATCH 19/28] coresight: fix handling of ETM trace register access via sysfs Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-26 00:00 +0200 [PATCH 27/28] coresight: etm4x: adding configurable address range filtering Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-26 00:00 +0200 [PATCH 01/28] coresight: access conn->child_name only if it's initialised Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-08-26 00:30 +0200 Re: [PATCH 00/28] coresight: next v4.8-rc3 Greg KH <gregkh@linuxfoundation.org> - 2016-08-31 13:10 +0200
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