Re: [PATCH v8 1/3] x86/boot: Add acpitb.c to parse acpi tables

Chao Fan
2018-10-16T02:48:44Z

On Thu, Oct 11, 2018 at 12:57:08PM +0200, Borislav Petkov wrote:
>On Wed, Oct 10, 2018 at 04:41:17PM +0800, Chao Fan wrote:
[...]
>> +#ifdef CONFIG_KEXEC
>> +static bool get_acpi_rsdp(acpi_physical_address *rsdp_addr)
>> +{
>> + char *args = (char *)get_cmd_line_ptr();
>> + size_t len = strlen((char *)args);
>> + char *tmp_cmdline, *param, *val;
>> + unsigned long long addr = 0;
>> + char *endptr;
>> +
>> + if (!strstr(args, "acpi_rsdp="))
>> + return false;
>> +
>> + tmp_cmdline = malloc(len+1);
>> + if (!tmp_cmdline)
>> + error("Failed to allocate space for tmp_cmdline");
>
>Why do you even need to allocate a tmp cmdline?
>
>Ah, I see what you've done - you've copied handle_mem_options() in
>kaslr.c. Well no, not really.
>
>That functionality needs to get extracted into a separate facility. Oh
>look, there's arch/x86/boot/compressed/cmdline.c which is begging to get
>extended.
>
>:-)
>

Hi Boris,

Sorry for disturbing you again, I want to make sure this detail with you.
You mean that I need splite this as a function and put it to
cmdline.c, right?
If my understand is wrong, please let me know.

Thanks,
Chao Fan