Re: [PATCH v5 1/2] x86/kexec: Build identity mapping for EFI systab and ACPI tables

From: Borislav Petkov
Date: Mon Apr 29 2019 - 08:51:08 EST

On Sun, Apr 28, 2019 at 01:41:14PM +0800, Baoquan He wrote:
> About this place, do you think below change is OK to you?
> ~~~
> The current code only builds identity mapping for physical memory during
> kexec-type loading. The regions reserved by firmware are not covered.
> In the later code change, the boot decompressing code of kexec-ed kernel
> will try to access EFI systab and ACPI tables, lacking identity mapping for
> them will cause error and reset system to firmware.

Yap, better.



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