Re: [PATCH v8 0/3] x86/boot/KASLR: Parse ACPI table and limit kaslr in immovable memory

Borislav Petkov
2018-10-13T22:05:41Z

On Sat, Oct 13, 2018 at 05:45:51PM -0400, Masayoshi Mizuma wrote:
> Yes, but I think we need to arrange the Chao's SRAT parsing to be used
> from kernel_randomize_memory() because Chao's approach needs the SRAT
> parsing before extract kernel and the padding size calculation needs
> the parsing in start_kernel(), so they are living in different life
> cycle and space.

Or you would like to pass some info from the compressed kernel to kernel
proper?

For example, something like the passing in add_e820ext() and the consumtion
in parse_setup_data():

switch (data_type) {
case SETUP_E820_EXT:
e820__memory_setup_extended(pa_data, data_len);

So info you need for your padding gets collected in
arch/x86/boot/compressed/acpitb.c and you consume it in
kernel_randomize_memory()?

Would that work?

:-)

--
Regards/Gruss,
Boris.

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