linux-kernel - Re: [PATCH v3 0/6] arm64: Clean up and simplify PA space size handling

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Message-Id: <173462903479.3930132.9019084013797129885.b4-ty@kernel.org>
Date: Thu, 19 Dec 2024 19:47:08 +0000
From: Will Deacon <will@...nel.org>
To: linux-arm-kernel@...ts.infradead.org,
	Ard Biesheuvel <ardb+git@...gle.com>
Cc: catalin.marinas@....com,
	kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	linux-kernel@...r.kernel.org,
	Ard Biesheuvel <ardb@...nel.org>,
	Marc Zyngier <maz@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Ryan Roberts <ryan.roberts@....com>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Quentin Perret <qperret@...gle.com>,
	Kees Cook <kees@...nel.org>
Subject: Re: [PATCH v3 0/6] arm64: Clean up and simplify PA space size handling

On Thu, 12 Dec 2024 09:18:42 +0100, Ard Biesheuvel wrote:
> This series addresses a number of buglets related to how we handle the
> size of the physical address space when building LPA2 capable kernels:
> 
> - reject 52-bit physical addressess in the mapping routines when LPA2 is
>   configured but not available at runtime
> - ensure that TCR.IPS is not set to 52-bits if LPA2 is not supported
> - ensure that TCR_EL2.PS and DS match the host, regardless of whether
>   LPA2 is available at stage 2
> - don't rely on kvm_get_parange() and invalid physical addresses as
>   control flags in the pKVM page donation APIs
> 
> [...]

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

[1/6] arm64/mm: Reduce PA space to 48 bits when LPA2 is not enabled
      https://git.kernel.org/arm64/c/bf74bb73cd87
[2/6] arm64/mm: Override PARange for !LPA2 and use it consistently
      https://git.kernel.org/arm64/c/62cffa496aac
[3/6] arm64/kvm: Configure HYP TCR.PS/DS based on host stage1
      https://git.kernel.org/arm64/c/f0da16992aef
[4/6] arm64/kvm: Avoid invalid physical addresses to signal owner updates
      https://git.kernel.org/arm64/c/9d86c3c97434
[5/6] arm64: Kconfig: force ARM64_PAN=y when enabling TTBR0 sw PAN
      https://git.kernel.org/arm64/c/92b6919d7fb2
[6/6] arm64/mm: Drop configurable 48-bit physical address space limit
      https://git.kernel.org/arm64/c/32d053d6f5e9

Cheers,
-- 
Will

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