linux-kernel - Re: [PATCH v3 7/8] arm64/efi: Move uaccess en/disable out of efi_set

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Message-ID: <aM1AIPmNGik2fqL3@willie-the-truck>
Date: Fri, 19 Sep 2025 12:36:00 +0100
From: Will Deacon <will@...nel.org>
To: Ard Biesheuvel <ardb+git@...gle.com>
Cc: linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Ard Biesheuvel <ardb@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v3 7/8] arm64/efi: Move uaccess en/disable out of
 efi_set_pgd()

On Thu, Sep 18, 2025 at 12:30:18PM +0200, Ard Biesheuvel wrote:
> From: Ard Biesheuvel <ardb@...nel.org>
> 
> efi_set_pgd() will no longer be called when invoking EFI runtime
> services via the efi_rts_wq work queue, but the uaccess en/disable are
> still needed when using PAN emulation using TTBR0 switching. So move
> these into the callers.
> 
> Signed-off-by: Ard Biesheuvel <ardb@...nel.org>
> ---
>  arch/arm64/include/asm/efi.h | 13 +++----------
>  arch/arm64/kernel/efi.c      | 18 ++++++++++++++++++
>  2 files changed, 21 insertions(+), 10 deletions(-)

Thanks. This addresses the comment I made last time around:

Acked-by: Will Deacon <will@...nel.org>

Will