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00a134fc2b
linux/arch/mips/kernel
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Paul Burton 00a134fc2b MIPS: pm-cps: Use per-CPU variables as per-CPU, not per-core 
The pm-cps code has up until now used per-CPU variables indexed by core,
rather than CPU number, in order to share data amongst sibling CPUs (ie.
VPs/threads in a core). This works fine for single cluster systems, but
with multi-cluster systems a core number is no longer unique in the
system, leading to sharing between CPUs that are not actually siblings.

Avoid this issue by using per-CPU variables as they are more generally
used - ie. access them using CPU numbers rather than core numbers.
Sharing between siblings is then accomplished by:
 - Assigning the same pointer to entries for each sibling CPU for the
   nc_asm_enter & ready_count variables, which allow this by virtue of
   being per-CPU pointers.

 - Indexing by the first CPU set in a CPUs cpu_sibling_map in the case
   of pm_barrier, for which we can't use the previous approach because
   the per-CPU variable is not a pointer.

Signed-off-by: Paul Burton <paulburton@kernel.org>
Signed-off-by: Dragan Mladjenovic <dragan.mladjenovic@syrmia.com>
Signed-off-by: Aleksandar Rikalo <arikalo@gmail.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2025-02-21 10:19:30 +01:00
..
syscalls Revert "mips: fix shmctl/semctl/msgctl syscall for o32" 2025-01-31 09:28:38 +01:00
.gitignore
access-helper.h MIPS: Fix new sparse warnings 2021-04-07 16:11:05 +02:00
asm-offsets.c MIPS: Export syscall stack arguments properly for remote use 2025-02-13 12:41:18 +01:00
bmips_5xxx_init.S
bmips_vec.S
branch.c
cacheinfo.c drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION() 2021-09-01 10:29:10 +02:00
cevt-bcm1480.c MIPS: Fix the wrong format specifier 2025-01-11 12:33:01 +01:00
cevt-ds1287.c
cevt-gt641xx.c
cevt-r4k.c MIPS: cevt-r4k: Don't call get_c0_compare_int if timer irq is installed 2024-08-20 10:36:52 +02:00
cevt-sb1250.c
cevt-txx9.c
cmpxchg.c MIPS: export __cmpxchg_small() 2024-10-23 18:10:24 +02:00
cps-vec-ns16550.S
cps-vec.S MIPS: cps-vec: Use macros for 64bits access 2024-02-20 12:44:59 +01:00
cpu-probe.c MIPS: Loongson64: Set timer mode in cpu-probe 2024-08-08 18:17:43 +02:00
cpu-r3k-probe.c mips: move cache declarations into header 2023-12-10 17:21:41 -08:00
crash_dump.c vmcore: convert copy_oldmem_page() to take an iov_iter 2022-04-29 14:37:59 -07:00
crash.c
csrc-bcm1480.c
csrc-ioasic.c
csrc-r4k.c Revert "MIPS: csrc-r4k: Apply verification clocksource flags" 2024-08-25 15:26:30 -07:00
csrc-sb1250.c
early_printk_8250.c
early_printk.c
elf.c MIPS: Implement ieee754 NAN2008 emulation mode 2024-07-12 13:09:25 +02:00
entry.S MIPS: Remove TX39XX support 2022-03-01 10:07:22 +01:00
fpu-probe.c MIPS: Implement ieee754 NAN2008 emulation mode 2024-07-12 13:09:25 +02:00
fpu-probe.h
ftrace.c MIPS: ftrace: Declare ftrace_get_parent_ra_addr() as static 2025-01-11 12:37:05 +01:00
genex.S MIPS: Allow vectored interrupt handler to reside everywhere for 64bit 2023-12-30 15:36:01 +01:00
gpio_txx9.c
head.S MIPS: Add a blank line after __HEAD 2025-01-11 12:32:12 +01:00
i8253.c
idle.c cpuidle,arch: Mark all regular cpuidle_state:: Enter methods __cpuidle 2023-01-13 11:48:18 +01:00
irq_txx9.c MIPS: Remove TX39XX support 2022-03-01 10:07:22 +01:00
irq-gt641xx.c
irq-msc01.c
irq.c MIPS: Only use current_stack_pointer on GCC 2022-03-14 15:02:53 +01:00
jump_label.c MIPS: jump_label: Fix compat branch range check 2022-11-11 15:46:03 +01:00
kgdb.c MIPS: kernel: Drop kgdb_call_nmi_hook 2021-02-15 12:23:54 +01:00
kprobes.c MIPS: Fix typos 2024-01-08 10:39:12 +01:00
linux32.c mips: add asm/syscalls.h header 2023-12-10 17:21:38 -08:00
machine_kexec.c mips: kexec: include linux/reboot.h 2023-12-10 17:21:42 -08:00
Makefile mips, kexec: fix the incorrect ifdeffery and dependency of CONFIG_KEXEC 2023-12-12 17:20:18 -08:00
mcount.S mips: replace #include <asm/export.h> with #include <linux/export.h> 2023-08-15 10:22:23 +02:00
mips-cm.c MIPS: CPS: Add a couple of multi-cluster utility functions 2024-07-09 10:48:17 +02:00
mips-cpc.c mips: cpc: Fix refcount leak in mips_cpc_default_phys_base 2022-04-26 15:11:25 +02:00
mips-mt-fpaff.c mips: add asm/syscalls.h header 2023-12-10 17:21:38 -08:00
mips-mt.c MIPS: kernel: Rename read/write_c0_ecc to read/writec0_errctl 2025-01-11 12:31:21 +01:00
mips-r2-to-r6-emul.c MIPS: Fix build error due to PTR used in more places 2022-01-27 09:04:19 +01:00
module.c arch: make execmem setup available regardless of CONFIG_MODULES 2024-05-14 00:31:44 -07:00
octeon_switch.S mips: remove unneeded #include <asm/export.h> 2023-08-15 10:22:23 +02:00
perf_event_mipsxx.c MIPS: fix typos in comments 2022-05-04 22:22:59 +02:00
perf_event.c
perf_regs.c
pm-cps.c MIPS: pm-cps: Use per-CPU variables as per-CPU, not per-core 2025-02-21 10:19:30 +01:00
pm.c
probes-common.h
proc.c MIPS: kernel: proc: Use str_yes_no() helper function 2024-11-12 15:46:20 +01:00
process.c MIPS: kernel: Clear FPU states when setting up kernel threads 2023-12-05 18:47:11 +01:00
prom.c of/fdt: add dt_phys arg to early_init_dt_scan and early_init_dt_verify 2024-10-29 15:32:45 -05:00
ptrace.c MIPS: scall: Save thread_info.syscall unconditionally on entry 2024-04-09 16:52:21 +02:00
ptrace32.c
r4k_fpu.S mips: replace #include <asm/export.h> with #include <linux/export.h> 2023-08-15 10:22:23 +02:00
r4k_switch.S
r4k-bugs64.c mips: add missing declarations for trap handlers 2023-12-10 17:21:38 -08:00
r2300_fpu.S mips: replace #include <asm/export.h> with #include <linux/export.h> 2023-08-15 10:22:23 +02:00
r2300_switch.S mips: remove unneeded #include <asm/export.h> 2023-08-15 10:22:23 +02:00
relocate_kernel.S MIPS: Fix typos 2024-01-08 10:39:12 +01:00
relocate.c of/fdt: add dt_phys arg to early_init_dt_scan and early_init_dt_verify 2024-10-29 15:32:45 -05:00
reset.c mips: Use do_kernel_power_off() 2022-05-19 19:30:31 +02:00
rtlx-mt.c mips: mt: make mt_class constant 2024-03-07 17:18:50 +01:00
rtlx.c
scall32-o32.S MIPS: Export syscall stack arguments properly for remote use 2025-02-13 12:41:18 +01:00
scall64-n32.S MIPS: scall: Save thread_info.syscall unconditionally on entry 2024-04-09 16:52:21 +02:00
scall64-n64.S MIPS: scall: Save thread_info.syscall unconditionally on entry 2024-04-09 16:52:21 +02:00
scall64-o32.S MIPS: scall: Save thread_info.syscall unconditionally on entry 2024-04-09 16:52:21 +02:00
segment.c mips: kernel: convert to DEFINE_SHOW_ATTRIBUTE 2022-09-19 16:40:17 +02:00
setup.c mm/memblock: add memblock_alloc_or_panic interface 2025-01-25 20:22:38 -08:00
signal_n32.c mips: signal: move sigcontext declarations to header 2023-12-10 17:21:39 -08:00
signal_o32.c mips: add asm/syscalls.h header 2023-12-10 17:21:38 -08:00
signal-common.h mips: signal: move sigcontext declarations to header 2023-12-10 17:21:39 -08:00
signal.c Just cleanups and fixes 2024-01-17 11:20:50 -08:00
signal32.c mips: add asm/syscalls.h header 2023-12-10 17:21:38 -08:00
smp-bmips.c mips: bmips: enable RAC on BMIPS4350 2024-06-27 10:44:36 +02:00
smp-cps.c MIPS: Allow using more than 32-bit addresses for reset vectors when possible 2024-10-30 23:45:48 +01:00
smp-mt.c MIPS: Rework smt cmdline parameters 2023-06-09 10:34:14 +02:00
smp-up.c
smp.c smp: Mark smp_prepare_boot_cpu() __init 2024-09-08 16:01:10 +02:00
spinlock_test.c mips: kernel: use DEFINE_DEBUGFS_ATTRIBUTE with debugfs_create_file_unsafe() 2021-03-14 14:09:49 +01:00
spram.c MIPS: kernel: Rename read/write_c0_ecc to read/writec0_errctl 2025-01-11 12:31:21 +01:00
stacktrace.c
sync-r4k.c MIPS: sync-r4k: Rework based on x86 tsc_sync 2024-07-03 16:50:12 +02:00
syscall.c mips: add asm/syscalls.h header 2023-12-10 17:21:38 -08:00
sysrq.c tty: sysrq: switch sysrq handlers from int to u8 2023-07-25 19:21:03 +02:00
time.c MIPS: Fix CP0 counter erratum detection for R4k CPUs 2022-04-29 15:52:00 +02:00
topology.c drivers/base/node: consolidate node device subsystem initialization in node_dev_init() 2022-03-22 15:57:10 -07:00
traps.c MIPS: traps: Use str_enabled_disabled() in parity_protection_init() 2025-01-11 12:38:54 +01:00
unaligned.c mips: add missing declarations for trap handlers 2023-12-10 17:21:38 -08:00
uprobes.c MIPS: uprobes: Restore thread.trap_nr 2023-04-24 13:31:44 +02:00
vdso.c mips: vdso: prefer do_mmap() to mmap_region() 2025-01-25 20:22:37 -08:00
vmlinux.lds.S MIPS: Place __kernel_entry at the beginning of text section 2024-11-27 09:36:01 +09:00
vpe-mt.c MIPS: Implement microMIPS MT ASE helpers 2024-02-23 10:13:47 +01:00
vpe.c MIPS: Fix typos 2024-01-08 10:39:12 +01:00
watch.c