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Allocate arm64 per-CPU data in the correct domain

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To minimise NUMA traffic allocate the pcpu, dpcpu, and boot stacks in
the correct domain when possible.

Submitted by:	markj
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D32338
This commit is contained in:
Andrew Turner 2021-10-06 15:08:04 +00:00
parent 806a88e742
commit a90ebeb5fe
4 changed files with 39 additions and 18 deletions
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14
sys/arm64/arm64/machdep.c
View File

@ -102,7 +102,12 @@ __FBSDID("$FreeBSD$");
enum arm64_bus arm64_bus_method = ARM64_BUS_NONE;
struct pcpu __pcpu[MAXCPU];
/*
* XXX: The .bss is assumed to be in the boot CPU NUMA domain. If not we
* could relocate this, but will need to keep the same virtual address as
* it's reverenced by the EARLY_COUNTER macro.
*/
struct pcpu pcpu0;
static struct trapframe proc0_tf;
@ -334,7 +339,10 @@ makectx(struct trapframe *tf, struct pcb *pcb)
static void
init_proc0(vm_offset_t kstack)
{
struct pcpu *pcpup = &__pcpu[0];
struct pcpu *pcpup;
pcpup = cpuid_to_pcpu[0];
MPASS(pcpup != NULL);
proc_linkup0(&proc0, &thread0);
thread0.td_kstack = kstack;
@ -762,7 +770,7 @@ initarm(struct arm64_bootparams *abp)
EXFLAG_NOALLOC);
/* Set the pcpu data, this is needed by pmap_bootstrap */
pcpup = &__pcpu[0];
pcpup = &pcpu0;
pcpu_init(pcpup, 0, sizeof(struct pcpu));
/*

39
sys/arm64/arm64/mp_machdep.c
View File

@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$");
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/csan.h>
#include <sys/domainset.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/malloc.h>
@ -151,7 +152,7 @@ static bool
is_boot_cpu(uint64_t target_cpu)
{
return (__pcpu[0].pc_mpidr == (target_cpu & CPU_AFF_MASK));
return (cpuid_to_pcpu[0]->pc_mpidr == (target_cpu & CPU_AFF_MASK));
}
static void
@ -213,15 +214,17 @@ init_secondary(uint64_t cpu)
* they can pass random value in it.
*/
mpidr = READ_SPECIALREG(mpidr_el1) & CPU_AFF_MASK;
if (cpu >= MAXCPU || __pcpu[cpu].pc_mpidr != mpidr) {
if (cpu >= MAXCPU || cpuid_to_pcpu[cpu] == NULL ||
cpuid_to_pcpu[cpu]->pc_mpidr != mpidr) {
for (cpu = 0; cpu < mp_maxid; cpu++)
if (__pcpu[cpu].pc_mpidr == mpidr)
if (cpuid_to_pcpu[cpu] != NULL &&
cpuid_to_pcpu[cpu]->pc_mpidr == mpidr)
break;
if ( cpu >= MAXCPU)
panic("MPIDR for this CPU is not in pcpu table");
}
pcpup = &__pcpu[cpu];
pcpup = cpuid_to_pcpu[cpu];
/*
* Set the pcpu pointer with a backup in tpidr_el1 to be
* loaded when entering the kernel from userland.
@ -482,7 +485,7 @@ cpu_mp_probe(void)
* do nothing. Returns true if the CPU is present and running.
*/
static bool
start_cpu(u_int cpuid, uint64_t target_cpu)
start_cpu(u_int cpuid, uint64_t target_cpu, int domain)
{
struct pcpu *pcpup;
vm_paddr_t pa;
@ -498,14 +501,17 @@ start_cpu(u_int cpuid, uint64_t target_cpu)
KASSERT(cpuid < MAXCPU, ("Too many CPUs"));
pcpup = &__pcpu[cpuid];
pcpup = (void *)kmem_malloc_domainset(DOMAINSET_PREF(domain),
sizeof(*pcpup), M_WAITOK | M_ZERO);
pcpu_init(pcpup, cpuid, sizeof(struct pcpu));
pcpup->pc_mpidr = target_cpu & CPU_AFF_MASK;
dpcpu[cpuid - 1] = (void *)kmem_malloc(DPCPU_SIZE, M_WAITOK | M_ZERO);
dpcpu[cpuid - 1] = (void *)kmem_malloc_domainset(
DOMAINSET_PREF(domain), DPCPU_SIZE, M_WAITOK | M_ZERO);
dpcpu_init(dpcpu[cpuid - 1], cpuid);
bootstacks[cpuid] = (void *)kmem_malloc(PAGE_SIZE, M_WAITOK | M_ZERO);
bootstacks[cpuid] = (void *)kmem_malloc_domainset(
DOMAINSET_PREF(domain), PAGE_SIZE, M_WAITOK | M_ZERO);
naps = atomic_load_int(&aps_started);
bootstack = (char *)bootstacks[cpuid] + PAGE_SIZE;
@ -548,6 +554,7 @@ madt_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
ACPI_MADT_GENERIC_INTERRUPT *intr;
u_int *cpuid;
u_int id;
int domain;
switch(entry->Type) {
case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
@ -559,8 +566,14 @@ madt_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
else
id = *cpuid;
if (start_cpu(id, intr->ArmMpidr)) {
__pcpu[id].pc_acpi_id = intr->Uid;
#ifdef NUMA
domain = acpi_pxm_get_cpu_locality(*cpuid);
#else
domain = 0;
#endif
if (start_cpu(id, intr->ArmMpidr, domain)) {
MPASS(cpuid_to_pcpu[id] != NULL);
cpuid_to_pcpu[id]->pc_acpi_id = intr->Uid;
/*
* Don't increment for the boot CPU, its CPU ID is
* reserved.
@ -623,7 +636,7 @@ start_cpu_fdt(u_int id, phandle_t node, u_int addr_size, pcell_t *reg)
else
cpuid = fdt_cpuid;
if (!start_cpu(cpuid, target_cpu))
if (!start_cpu(cpuid, target_cpu, 0))
return (FALSE);
/*
@ -636,7 +649,7 @@ start_cpu_fdt(u_int id, phandle_t node, u_int addr_size, pcell_t *reg)
if (vm_ndomains == 1 ||
OF_getencprop(node, "numa-node-id", &domain, sizeof(domain)) <= 0)
domain = 0;
__pcpu[cpuid].pc_domain = domain;
cpuid_to_pcpu[cpuid]->pc_domain = domain;
if (domain < MAXMEMDOM)
CPU_SET(cpuid, &cpuset_domain[domain]);
return (TRUE);
@ -667,7 +680,7 @@ cpu_mp_start(void)
/* CPU 0 is always boot CPU. */
CPU_SET(0, &all_cpus);
__pcpu[0].pc_mpidr = READ_SPECIALREG(mpidr_el1) & CPU_AFF_MASK;
cpuid_to_pcpu[0]->pc_mpidr = READ_SPECIALREG(mpidr_el1) & CPU_AFF_MASK;
switch(arm64_bus_method) {
#ifdef DEV_ACPI

2
sys/arm64/include/counter.h
View File

@ -32,7 +32,7 @@
#include <sys/pcpu.h>
#include <machine/atomic.h>
#define EARLY_COUNTER &__pcpu[0].pc_early_dummy_counter
#define EARLY_COUNTER &pcpu0.pc_early_dummy_counter
#define counter_enter() do {} while (0)
#define counter_exit() do {} while (0)

2
sys/arm64/include/pcpu_aux.h
View File

@ -47,6 +47,6 @@
*/
_Static_assert(PAGE_SIZE % sizeof(struct pcpu) == 0, "fix pcpu size");
extern struct pcpu __pcpu[];
extern struct pcpu pcpu0;
#endif /* _MACHINE_PCPU_AUX_H_ */