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hwpmc_arm64: accept raw event codes for PMC_OP_PMCALLOCATE

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Make it possible to specify event codes without an offset of
PMC_EV_ARMV8_FIRST, by setting a machine-dependent flag. This is
required to make use of event definitions from pmu-events.

Reviewed by:	ray (slightly earlier version)
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D30602
This commit is contained in:
Mitchell Horne 2021-05-19 13:11:33 -03:00
parent 5867cccdc4
commit 8cc3815f02
2 changed files with 11 additions and 5 deletions
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5
sys/arm64/include/pmc_mdep.h
View file

@ -38,7 +38,10 @@
#include <dev/hwpmc/hwpmc_arm64.h>
union pmc_md_op_pmcallocate {
uint64_t __pad[4];
uint32_t pm_md_flags;
#define PM_MD_RAW_EVENT 0x1
uint32_t __pad32;
uint64_t __pad[3];
};
/* Logging */

11
sys/dev/hwpmc/hwpmc_arm64.c
View file

@ -181,11 +181,14 @@ arm64_allocate_pmc(int cpu, int ri, struct pmc *pm,
}
pe = a->pm_ev;
config = (uint32_t)pe - PMC_EV_ARMV8_FIRST;
if (config > (PMC_EV_ARMV8_LAST - PMC_EV_ARMV8_FIRST))
return (EINVAL);
/* Adjust the config value if needed. */
config = (uint32_t)pe;
if ((a->pm_md.pm_md_flags & PM_MD_RAW_EVENT) == 0) {
config -= PMC_EV_ARMV8_FIRST;
if (config > (PMC_EV_ARMV8_LAST - PMC_EV_ARMV8_FIRST))
return (EINVAL);
}
pm->pm_md.pm_arm64.pm_arm64_evsel = config;
PMCDBG2(MDP, ALL, 2, "arm64-allocate ri=%d -> config=0x%x", ri, config);
return (0);