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MIPS: Rework smt cmdline parameters

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Provide a generic smt parameters interface aligned with s390
to allow users to limit smt usage and threads per core.

It replaced previous undocumented "nothreads" parameter for
smp-cps which is ambiguous and does not cover smp-mt.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Jiaxun Yang
2023-05-21 23:31:22 +01:00
committed by Thomas Bogendoerfer
parent dfbd992e0e
commit 96cb8ae28c
5 changed files with 25 additions and 15 deletions
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13
arch/mips/kernel/smp-cps.c
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@@ -25,24 +25,13 @@
#include <asm/time.h>
#include <asm/uasm.h>
static bool threads_disabled;
static DECLARE_BITMAP(core_power, NR_CPUS);
struct core_boot_config *mips_cps_core_bootcfg;
static int __init setup_nothreads(char *s)
{
threads_disabled = true;
return 0;
}
early_param("nothreads", setup_nothreads);
static unsigned core_vpe_count(unsigned int cluster, unsigned core)
{
if (threads_disabled)
return 1;
return mips_cps_numvps(cluster, core);
return min(smp_max_threads, mips_cps_numvps(cluster, core));
}
static void __init cps_smp_setup(void)