MIPS: smp-cps: Add nothreads kernel parameter
When debugging a new system or core it can be useful to disable the use of multithreading. Introduce a "nothreads" kernel command line parameter that can be set in order to do so. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Niklas Cassel <niklas.cassel@axis.com> Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/12340/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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@ -27,14 +27,25 @@
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#include <asm/time.h>
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#include <asm/uasm.h>
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static bool threads_disabled;
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static DECLARE_BITMAP(core_power, NR_CPUS);
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struct core_boot_config *mips_cps_core_bootcfg;
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static int __init setup_nothreads(char *s)
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{
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threads_disabled = true;
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return 0;
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}
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early_param("nothreads", setup_nothreads);
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static unsigned core_vpe_count(unsigned core)
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{
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unsigned cfg;
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if (threads_disabled)
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return 1;
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if ((!config_enabled(CONFIG_MIPS_MT_SMP) || !cpu_has_mipsmt)
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&& (!config_enabled(CONFIG_CPU_MIPSR6) || !cpu_has_vp))
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return 1;
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