From: Tzung-Bi Shih <tzungbi@kernel.org>
To: Hsin-Te Yuan <yuanhsinte@chromium.org>
Cc: Brian Norris <briannorris@chromium.org>,
Julius Werner <jwerner@chromium.org>,
chrome-platform@lists.linux.dev, linux-kernel@vger.kernel.org,
Yidi Lin <yidilin@google.com>
Subject: Re: [PATCH v2] firmware: google: coreboot_table: skip no-map CBMEM entries
Date: Mon, 20 Jul 2026 02:56:56 +0000 [thread overview]
Message-ID: <al2OePSmQNG5zkwx@google.com> (raw)
In-Reply-To: <20260717-coreboot-v2-1-8f8b389e3758@chromium.org>
On Fri, Jul 17, 2026 at 08:41:26AM +0000, Hsin-Te Yuan wrote:
> From: Yidi Lin <yidilin@google.com>
>
> 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!
prev parent reply other threads:[~2026-07-20 2:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-17 8:41 [PATCH v2] firmware: google: coreboot_table: skip no-map CBMEM entries Hsin-Te Yuan
2026-07-20 2:56 ` Tzung-Bi Shih [this message]
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