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| author | Wei Li <liwei391@huawei.com> | 2020-12-03 09:54:43 +0300 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-12-04 15:01:47 +0300 |
| commit | d8d3276bfc49e114103c54d5f93268c70dcf3600 (patch) | |
| tree | 4539722f7711d220627d4315c3d597d165ade5c8 /arch/mips | |
| parent | ca13300a88a37a90160d352cede05776ea723919 (diff) | |
| download | linux-d8d3276bfc49e114103c54d5f93268c70dcf3600.tar.xz | |
MIPS: SMP-CPS: Add support for irq migration when CPU offline
Currently we won't migrate irqs when offline CPUs, which has been
implemented on most architectures. That will lead to some devices work
incorrectly if the bound cores are offline.
While that can be easily supported by enabling GENERIC_IRQ_MIGRATION.
But i don't pretty known the reason it was not supported on all MIPS
platforms.
This patch add the support for irq migration on MIPS CPS platform, and
it's tested on the interAptiv processor.
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/smp-cps.c | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index b99498958b5c..b49a390df1cb 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2488,6 +2488,7 @@ config MIPS_CPS select SYS_SUPPORTS_SCHED_SMT if CPU_MIPSR6 select SYS_SUPPORTS_SMP select WEAK_ORDERING + select GENERIC_IRQ_MIGRATION if HOTPLUG_CPU help Select this if you wish to run an SMP kernel across multiple cores within a MIPS Coherent Processing System. When this option is diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c index dbb3f1fc71ab..8b027c72b8ef 100644 --- a/arch/mips/kernel/smp-cps.c +++ b/arch/mips/kernel/smp-cps.c @@ -12,6 +12,7 @@ #include <linux/slab.h> #include <linux/smp.h> #include <linux/types.h> +#include <linux/irq.h> #include <asm/bcache.h> #include <asm/mips-cps.h> @@ -461,6 +462,7 @@ static int cps_cpu_disable(void) smp_mb__after_atomic(); set_cpu_online(cpu, false); calculate_cpu_foreign_map(); + irq_migrate_all_off_this_cpu(); return 0; } |