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authorPaul E. McKenney <paulmck@kernel.org>2023-11-26 11:06:10 -0800
committerBoqun Feng <boqun.feng@gmail.com>2024-02-14 07:53:50 -0800
commit600716592a3a6de8bfcf3a0625d75cda8dce3ced (patch)
tree7a3f4e2615b4427c646d68684d7cbb8d683105b2 /kernel/context_tracking.c
parent739337d482f12b9eff062586ba64f008fcc6efba (diff)
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doc: Add EARLY flag to early-parsed kernel boot parameters
Kernel boot parameters declared with early_param() are parsed before embedded parameters are extracted from initrd, and early_param() parameters are not helpful when embedded in initrd. Therefore, mark early_param() kernel boot parameters with "EARLY" in kernel-parameters.txt. The following early_param() calls declare kernel boot parameters that are undocumented: early_param("atmel.pm_modes", at91_pm_modes_select); early_param("mem_fclk_21285", early_fclk); early_param("ecc", early_ecc); early_param("cachepolicy", early_cachepolicy); early_param("nodebugmon", early_debug_disable); early_param("kfence.sample_interval", parse_kfence_early_init); early_param("additional_cpus", setup_additional_cpus); early_param("stram_pool", atari_stram_setup); early_param("disable_octeon_edac", disable_octeon_edac); early_param("rd_start", rd_start_early); early_param("rd_size", rd_size_early); early_param("coherentio", setcoherentio); early_param("nocoherentio", setnocoherentio); early_param("fadump", early_fadump_param); early_param("fadump_reserve_mem", early_fadump_reserve_mem); early_param("no_stf_barrier", handle_no_stf_barrier); early_param("no_rfi_flush", handle_no_rfi_flush); early_param("smt-enabled", early_smt_enabled); early_param("ppc_pci_reset_phbs", pci_reset_phbs_setup); early_param("ps3fb", early_parse_ps3fb); early_param("ps3flash", early_parse_ps3flash); early_param("novx", disable_vector_extension); early_param("nobp", nobp_setup_early); early_param("nospec", nospec_setup_early); early_param("possible_cpus", _setup_possible_cpus); early_param("stp", early_parse_stp); early_param("nopfault", nopfault); early_param("nmi_mode", nmi_mode_setup); early_param("sh_mv", early_parse_mv); early_param("pmb", early_pmb); early_param("hvirq", early_hvirq_major); early_param("cfi", cfi_parse_cmdline); early_param("disableapic", setup_disableapic); early_param("noapictimer", parse_disable_apic_timer); early_param("disable_cpu_apicid", apic_set_disabled_cpu_apicid); early_param("uv_memblksize", parse_mem_block_size); early_param("retbleed", retbleed_parse_cmdline); early_param("no-kvmclock-vsyscall", parse_no_kvmclock_vsyscall); early_param("update_mptable", update_mptable_setup); early_param("alloc_mptable", parse_alloc_mptable_opt); early_param("possible_cpus", _setup_possible_cpus); early_param("lsmsi", early_parse_ls_scfg_msi); early_param("nokgdbroundup", opt_nokgdbroundup); early_param("kgdbcon", opt_kgdb_con); early_param("kasan", early_kasan_flag); early_param("kasan.mode", early_kasan_mode); early_param("kasan.vmalloc", early_kasan_flag_vmalloc); early_param("kasan.page_alloc.sample", early_kasan_flag_page_alloc_sample); early_param("kasan.page_alloc.sample.order", early_kasan_flag_page_alloc_sample_order); early_param("kasan.fault", early_kasan_fault); early_param("kasan.stacktrace", early_kasan_flag_stacktrace); early_param("kasan.stack_ring_size", early_kasan_flag_stack_ring_size); early_param("accept_memory", accept_memory_parse); early_param("page_table_check", early_page_table_check_param); sh_early_platform_init("earlytimer", &sh_cmt_device_driver); early_param_on_off("gbpages", "nogbpages", direct_gbpages, CONFIG_X86_DIRECT_GBPAGES); These are not necessarily bugs, given that some kernel boot parameters are intended for deep debugging rather than general use. This work does not cover all of the kernel boot parameters declared using cmdline_find_option() and cmdline_find_option_bool(). If these are in fact guaranteed to be early (which appears to be the case), they can be added in a later version of this patch. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Petr Malat <oss@malat.biz> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: <linux-doc@vger.kernel.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'kernel/context_tracking.c')
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