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libpmc: Allow specifying explicit EVENT_xxH events on armv7 and arm64

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This is useful for processors where we don't have an event table; in
those cases we default to a Cortex A8 (armv7) or Cortex A53 (arm64) in
order to attempt to provide something useful, but you're then limited to
the counters in those tables, some of which may also not be implemented
(e.g. LD/ST_RETIRED are no longer implemented in more recent cores,
replaced by LD/ST_SPEC).

Adding the raw EVENT_xxH event lists to each table ensures that you can
always request the exact events you want, regardless of what has been
detected or is known.

Reviewed by:	mhorne
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D33805
This commit is contained in:
Jessica Clarke 2022-02-15 16:10:34 +00:00
parent 235ed6a486
commit 9f22e0959b
1 changed files with 10 additions and 0 deletions
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10
lib/libpmc/libpmc.c
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@ -143,29 +143,39 @@ static struct pmc_event_descr soft_event_table[PMC_EV_DYN_COUNT];
#undef __PMC_EV_ALIAS
#define __PMC_EV_ALIAS(N,CODE) { N, PMC_EV_##CODE },
/*
* TODO: Factor out the __PMC_EV_ARMV7/8 list into a single separate table
* rather than duplicating for each core.
*/
static const struct pmc_event_descr cortex_a8_event_table[] =
{
__PMC_EV_ALIAS_ARMV7_CORTEX_A8()
__PMC_EV_ARMV7()
};
static const struct pmc_event_descr cortex_a9_event_table[] =
{
__PMC_EV_ALIAS_ARMV7_CORTEX_A9()
__PMC_EV_ARMV7()
};
static const struct pmc_event_descr cortex_a53_event_table[] =
{
__PMC_EV_ALIAS_ARMV8_CORTEX_A53()
__PMC_EV_ARMV8()
};
static const struct pmc_event_descr cortex_a57_event_table[] =
{
__PMC_EV_ALIAS_ARMV8_CORTEX_A57()
__PMC_EV_ARMV8()
};
static const struct pmc_event_descr cortex_a76_event_table[] =
{
__PMC_EV_ALIAS_ARMV8_CORTEX_A76()
__PMC_EV_ARMV8()
};
static const struct pmc_event_descr tsc_event_table[] =