Re: [PATCH v2] firmware: google: coreboot_table: skip no-map CBMEM entries
From: Tzung-Bi Shih
Date: Sun Jul 19 2026 - 22:59:43 EST
On Fri, Jul 17, 2026 at 08:41:26AM +0000, Hsin-Te Yuan wrote:
> From: Yidi Lin <yidilin@xxxxxxxxxx>
>
> On ARM64 platforms, certain reserved memory regions (like those used
> by pKVM) are marked with the 'no-map' property. This indicates that
> the host kernel is forbidden from creating a structural mapping for
> these regions.
>
> The coreboot table may describe CBMEM entries that overlap with or are
> entirely contained within these no-map regions. Attempting to populate
> these entries as devices and subsequently remapping them can lead to
> system crashes or security violations.
>
> [...]
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git for-firmware-next
[1/1] firmware: google: coreboot_table: skip no-map CBMEM entries
commit: e31ecda9e3af675bc05039f0791a34a46c27f253
Thanks!