6bae79f884
bus_get_cpus() returns a specified set of CPUs for a device. It accepts an enum for the second parameter that indicates the type of cpuset to request. Currently two valus are supported: - LOCAL_CPUS (on x86 this returns all the CPUs in the package closest to the device when DEVICE_NUMA is enabled) - INTR_CPUS (like LOCAL_CPUS but only returns 1 SMT thread for each core) For systems that do not support NUMA (or if it is not enabled in the kernel config), LOCAL_CPUS fails with EINVAL. INTR_CPUS is mapped to 'all_cpus' by default. The idea is that INTR_CPUS should always return a valid set. Device drivers which want to use per-CPU interrupts should start using INTR_CPUS instead of simply assigning interrupts to all available CPUs. In the future we may wish to add tunables to control the policy of INTR_CPUS (e.g. should it be local-only or global, should it ignore SMT threads or not). The x86 nexus driver exposes the internal set of interrupt CPUs from the the x86 interrupt code via INTR_CPUS. The ACPI bus driver and PCI bridge drivers use _PXM to return a suitable LOCAL_CPUS set when _PXM exists and DEVICE_NUMA is enabled. They also and the global INTR_CPUS set from the nexus driver with the per-domain set from _PXM to generate a local INTR_CPUS set for child devices. Compared to the r298933, this version uses 'struct _cpuset' in <sys/bus.h> instead of 'cpuset_t' to avoid requiring <sys/param.h> (<sys/_cpuset.h> still requires <sys/param.h> for MAXCPU even though <sys/_bitset.h> does not after recent changes). |
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.. | ||
pc | ||
xen | ||
_align.h | ||
_bus.h | ||
_inttypes.h | ||
_limits.h | ||
_stdint.h | ||
_types.h | ||
acpica_machdep.h | ||
apm_bios.h | ||
apm_segments.h | ||
asm.h | ||
asmacros.h | ||
atomic.h | ||
bootinfo.h | ||
bus_dma.h | ||
bus.h | ||
clock.h | ||
counter.h | ||
cpu.h | ||
cpufunc.h | ||
cputypes.h | ||
cserial.h | ||
db_machdep.h | ||
dump.h | ||
elan_mmcr.h | ||
elf.h | ||
endian.h | ||
exec.h | ||
fdt.h | ||
float.h | ||
floatingpoint.h | ||
frame.h | ||
gdb_machdep.h | ||
ieeefp.h | ||
if_wl_wavelan.h | ||
in_cksum.h | ||
intr_machdep.h | ||
ioctl_bt848.h | ||
ioctl_meteor.h | ||
iodev.h | ||
kdb.h | ||
limits.h | ||
md_var.h | ||
memdev.h | ||
metadata.h | ||
minidump.h | ||
mp_watchdog.h | ||
nexusvar.h | ||
npx.h | ||
ofw_machdep.h | ||
param.h | ||
pcaudioio.h | ||
pcb_ext.h | ||
pcb.h | ||
pci_cfgreg.h | ||
pcpu.h | ||
perfmon.h | ||
pmap.h | ||
pmc_mdep.h | ||
ppireg.h | ||
proc.h | ||
profile.h | ||
psl.h | ||
ptrace.h | ||
pvclock.h | ||
reg.h | ||
reloc.h | ||
resource.h | ||
runq.h | ||
segments.h | ||
setjmp.h | ||
sf_buf.h | ||
sigframe.h | ||
signal.h | ||
smapi.h | ||
smp.h | ||
speaker.h | ||
specialreg.h | ||
stack.h | ||
stdarg.h | ||
sysarch.h | ||
timerreg.h | ||
trap.h | ||
tss.h | ||
ucontext.h | ||
varargs.h | ||
vdso.h | ||
vm86.h | ||
vm.h | ||
vmparam.h | ||
xbox.h |