@@ -583,39 +583,34 @@ static void etm4_set_default_config(struct etmv4_config *config)
static void etm4_set_default_filter(struct etmv4_config *config)
{
- /*
- * TRCVICTLR::SSSTATUS == 1, the start-stop logic is
- * in the started state
- */
- config->vinst_ctrl |= BIT(9);
+ u64 start, stop, access_type = 0;
/*
* Configure address range comparator '0' to encompass all
* possible addresses.
*/
+ start = 0x0;
+ stop = ~0x0;
- /* First half of default address comparator: start at address 0 */
- config->addr_val[ETM_DEFAULT_ADDR_COMP] = 0x0;
- /* trace instruction addresses */
- config->addr_acc[ETM_DEFAULT_ADDR_COMP] &= ~(BIT(0) | BIT(1));
- /* EXLEVEL_NS, bits[12:15], only trace application and kernel space */
- config->addr_acc[ETM_DEFAULT_ADDR_COMP] |= ETM_EXLEVEL_NS_HYP;
- /* EXLEVEL_S, bits[11:8], don't trace anything in secure state */
- config->addr_acc[ETM_DEFAULT_ADDR_COMP] |= (ETM_EXLEVEL_S_APP |
- ETM_EXLEVEL_S_OS |
- ETM_EXLEVEL_S_HYP);
- config->addr_type[ETM_DEFAULT_ADDR_COMP] = ETM_ADDR_TYPE_RANGE;
+ /* EXLEVEL_NS, bits[12:15], always stay away from hypervisor mode. */
+ access_type = ETM_EXLEVEL_NS_HYP;
/*
- * Second half of default address comparator: go all
- * the way to the top.
- */
- config->addr_val[ETM_DEFAULT_ADDR_COMP + 1] = ~0x0;
- /* trace instruction addresses */
- config->addr_acc[ETM_DEFAULT_ADDR_COMP + 1] &= ~(BIT(0) | BIT(1));
- /* Address comparator type must be equal for both halves */
- config->addr_acc[ETM_DEFAULT_ADDR_COMP + 1] =
- config->addr_acc[ETM_DEFAULT_ADDR_COMP];
+ * EXLEVEL_S, bits[11:8], don't trace anything happening
+ * in secure state.
+ */
+ access_type |= (ETM_EXLEVEL_S_APP |
+ ETM_EXLEVEL_S_OS |
+ 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;
+
+ /* 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;
/*
@@ -624,7 +619,13 @@ static void etm4_set_default_filter(struct etmv4_config *config)
*/
config->viiectlr = BIT(0);
- /* no start-stop filtering for ViewInst */
+ /*
+ * TRCVICTLR::SSSTATUS == 1, the start-stop logic is
+ * in the started state
+ */
+ config->vinst_ctrl |= BIT(9);
+
+ /* No start-stop filtering for ViewInst */
config->vissctlr = 0x0;
}
The default filter configuration was hard to read and included some redundancy. This patch attempts to stream line configuration and improve readability. No change of functionality is included. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- drivers/hwtracing/coresight/coresight-etm4x.c | 53 ++++++++++++++------------- 1 file changed, 27 insertions(+), 26 deletions(-) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel