mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-13 14:14:37 +00:00
c056718464
Currently we do a spin on secondary cpus when waiting to boot. This theoretically causes issues with power consumption and does cause issues with qemu cycle burning (it starves cpu 0 from actually being able to boot.) This change puts each secondary cpu to sleep if they have a power management unit, then signals them to wake via IPI when its time to boot. If the cpus have no power management unit they will loop as before. Note: The wakeup IPI requires a special interrupt handler as on secondary cpu's the interrupt infrastructure is not yet established. This interrupt handler is set and reset by updating SPR_EVBAR. Signed-off-by: Stafford Horne <shorne@gmail.com> |
||
|---|---|---|
| .. | ||
| .gitignore | ||
| asm-offsets.c | ||
| dma.c | ||
| entry.S | ||
| head.S | ||
| irq.c | ||
| Makefile | ||
| module.c | ||
| or32_ksyms.c | ||
| process.c | ||
| prom.c | ||
| ptrace.c | ||
| setup.c | ||
| signal.c | ||
| smp.c | ||
| sys_call_table.c | ||
| time.c | ||
| traps.c | ||
| vmlinux.h | ||
| vmlinux.lds.S | ||