Re: [PATCH V38 15/29] acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down

On Wed, Aug 14, 2019 at 10:14:54AM -0700, Matthew Garrett wrote:

We explicitly don't want to pay attention to the acpi_rsdp kernel
parameter in early boot except for the case of finding the SRAT table,
and we only need that if CONFIG_RANDOMIZE_BASE and
CONFIG_MEMORY_HOTREMOVE are set. However, we *do* want to tell the
actual kernel where the RSDP is if we found it via some other means,
so we can't just clear the boot parameters value.

Ok.

The kernel proper will parse the command line again and will then (if
lockdown isn't enabled) override the actual value we passed up in boot
params.

Yeah, ok, I see what you're doing there. AFAICT, you do that in

setup_arch->acpi_boot_table_init-> ... -> acpi_os_get_root_pointer()

I hope nothing needs it earlier because then we'll have to restructure
again...

Thx.

-- 
Regards/Gruss,
    Boris.

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