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SubjectRe: [PATCH v2 2/2] x86, kexec_file_load: make it work with efi=noruntime or efi=old_map
On Mon, Jan 21, 2019 at 09:29:32AM +0100, Borislav Petkov wrote:
>On Mon, Jan 21, 2019 at 09:18:30AM +0800, Chao Fan wrote:
>> So I have changed as this method and put in my mail thread, you may not
>> notice, so I put here for my function if I need to fill the
>> boot_parameters:
>>
>> static inline acpi_physical_address get_boot_params_rsdp(void)
>> {
>> return boot_params->acpi_rsdp_addr;
>> }
>
>Why do you need that silly wrapper?
>
>> static acpi_physical_address get_rsdp_addr(void)
>> {
>> bool boot_params_rsdp_exist;
>
>What's that bool supposed to do?
>
>> acpi_physical_address pa;
>>
>> pa = get_acpi_rsdp();
>>
>> if (!pa)
>> pa = get_boot_params_rsdp();
>>
>> if (!pa) {
>> pa = efi_get_rsdp_addr();
>> boot_params_rsdp_exist = false;
>> }
>> else
>> boot_params_rsdp_exist = true;
>>
>> if (!pa)
>> pa = bios_get_rsdp_addr();
>>
>> if (pa && !boot_params_rsdp_exist)
>> boot_params.acpi_rsdp_addr = pa;
>>
>> return pa;
>> }
>>
>> At the same time, I notice kernel only parses it when
>> "#ifdef CONFIG_ACPI", we should keep sync with kernel, but I think
>> we are parsing SRAT, CONFIG_ACPI is needed sure, so I am going to
>> update the define of EARLY_SRAT_PARSE:
>>
>> config EARLY_SRAT_PARSE
>> bool "EARLY SRAT parsing"
>> def_bool y
>> depends on RANDOMIZE_BASE && MEMORY_HOTREMOVE && ACPI
>
>Actually, you don't need that anymore - make it unconditionally
>built-in. Because there are a bunch of users which need this and instead
>of complicating this config option with a bunch of dependencies, we can
>just as well have it always on.

According to your reply, I change it as:
vmlinux-objs-y += $(obj)/acpi.o
But I notice the only function call entry is in kaslr.c which needs
RANDOMIZE_BASE, so do I need change it as:
vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/acpi.o

Thanks,
Chao Fan

>
>Thx.
>
>--
>Regards/Gruss,
> Boris.
>
>Good mailing practices for 400: avoid top-posting and trim the reply.
>
>


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