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arm64: acpi: Set capacity_dmips_mhz for CPUs 

The GICC structure describes a relative power efficiency for each
processor. Use this value as-is for the capacity_dmips_mhz value of a
cpu. This makes the assumption that "more efficient" means "slower".
This commit is contained in:
jmcneill 2021-11-24 10:01:24 +00:00
parent cb0c5a1873
commit 47ed2bf4a1
1 changed files with 7 additions and 2 deletions
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9
sys/arch/arm/acpi/cpu_acpi.c
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@ -1,4 +1,4 @@
/* $NetBSD: cpu_acpi.c,v 1.11 2021/10/17 12:41:05 jmcneill Exp $ */
/* $NetBSD: cpu_acpi.c,v 1.12 2021/11/24 10:01:24 jmcneill Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@ -33,7 +33,7 @@
#include "opt_multiprocessor.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cpu_acpi.c,v 1.11 2021/10/17 12:41:05 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: cpu_acpi.c,v 1.12 2021/11/24 10:01:24 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -93,6 +93,7 @@ cpu_acpi_match(device_t parent, cfdata_t cf, void *aux)
static void
cpu_acpi_attach(device_t parent, device_t self, void *aux)
{
prop_dictionary_t dict = device_properties(self);
ACPI_MADT_GENERIC_INTERRUPT *gicc = aux;
const uint64_t mpidr = gicc->ArmMpidr;
const int unit = device_unit(self);
@ -123,6 +124,10 @@ cpu_acpi_attach(device_t parent, device_t self, void *aux)
}
#endif /* MULTIPROCESSOR */
/* Assume that less efficient processors are faster. */
prop_dictionary_set_uint32(dict, "capacity_dmips_mhz",
gicc->EfficiencyClass);
/* Store the ACPI Processor UID in cpu_info */
ci->ci_acpiid = gicc->Uid;