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authorJulian Stecklina2024-03-28 16:42:12 +0100
committerIngo Molnar2024-03-29 08:19:12 +0100
commit4faa0e5d6d79fc4c6e1943e8b62a65744d8439a0 (patch)
treeed66ed65ff6fbf0833560bf706b204e88a157b72 /scripts/Makefile.dtbinst
parent17608373cf907afe97654998663cc2ab8070e90b (diff)
x86/boot: Move kernel cmdline setup earlier in the boot process (again)
When split_lock_detect=off (or similar) is specified in CONFIG_CMDLINE, its effect is lost. The flow is currently this: setup_arch(): -> early_cpu_init() -> early_identify_cpu() -> sld_setup() -> sld_state_setup() -> Looks for split_lock_detect in boot_command_line -> e820__memory_setup() -> Assemble final command line: boot_command_line = builtin_cmdline + boot_cmdline -> parse_early_param() There were earlier attempts at fixing this in: 8d48bf8206f7 ("x86/boot: Pull up cmdline preparation and early param parsing") later reverted in: fbe618399854 ("Revert "x86/boot: Pull up cmdline preparation and early param parsing"") ... because parse_early_param() can't be called before e820__memory_setup(). In this patch, we just move the command line concatenation to the beginning of early_cpu_init(). This should fix sld_state_setup(), while not running in the same issues as the earlier attempt. The order is now: setup_arch(): -> Assemble final command line: boot_command_line = builtin_cmdline + boot_cmdline -> early_cpu_init() -> early_identify_cpu() -> sld_setup() -> sld_state_setup() -> Looks for split_lock_detect in boot_command_line -> e820__memory_setup() -> parse_early_param() Signed-off-by: Julian Stecklina <julian.stecklina@cyberus-technology.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: linux-kernel@vger.kernel.org
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