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coresight: etm4x: cleaning up default filter configuration

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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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2016-08-25 15:19:14 -06:00 committed by Greg Kroah-Hartman
parent 2a5695a585
commit 5edd944b43
1 changed files with 27 additions and 26 deletions
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53
drivers/hwtracing/coresight/coresight-etm4x.c
View File

@ -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;
}