linux-kernel - Re: [PATCH v3 0/3] arm64: realm: Add support for encrypted data from firmware

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Message-Id: <175827312255.1088160.4082411097275002683.b4-ty@kernel.org>
Date: Fri, 19 Sep 2025 19:38:18 +0100
From: Will Deacon <will@...nel.org>
To: linux-arm-kernel@...ts.infradead.org,
	Suzuki K Poulose <suzuki.poulose@....com>
Cc: catalin.marinas@....com,
	kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-coco@...ts.linux.dev,
	gshan@...hat.com,
	aneesh.kumar@...nel.org,
	sami.mujawar@....com,
	sudeep.holla@....com,
	steven.price@....com
Subject: Re: [PATCH v3 0/3] arm64: realm: Add support for encrypted data from firmware

On Thu, 18 Sep 2025 13:56:15 +0100, Suzuki K Poulose wrote:
> Confidential compute firmware may provide secret data via reserved memory regions
> (e.g., ACPI CCEL, EFI Coco secret area). These must be ioremap'ed() as encrypted.
> As of now, realm only maps "trusted devices" (RIPAS = RSI_RIPAS_DEV) as encrypted.
> This series adds support for mapping areas that are protected
> (i.e., RIPAS = RSI_RIPAS_RAM) as encrypted. Also, extrapolating that, we can map
> anything that is not RIPAS_EMPTY as protected, as it is guaranteed to be "protected".
> 
> [...]

Applied to arm64 (for-next/cca), thanks!

[1/3] arm64: realm: ioremap: Allow mapping memory as encrypted
      https://git.kernel.org/arm64/c/fa84e534c3ec
[2/3] arm64: Enable EFI secret area Securityfs support
      https://git.kernel.org/arm64/c/9e8a3df3e7f7
[3/3] arm64: acpi: Enable ACPI CCEL support
      https://git.kernel.org/arm64/c/d02c2e45b1e7

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev