From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Urja <urja@urja.dev>
Cc: "linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Linus Walleij <linus.walleij@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Kees Cook <keescook@chromium.org>
Subject: Re: Userspace programs segfaulting since CONFIG_ARM_PAN was introduced for LPAE
Date: Mon, 29 Jul 2024 09:51:15 +0100 [thread overview]
Message-ID: <ZqdYA+43xVitaAWL@shell.armlinux.org.uk> (raw)
In-Reply-To: <PmbX6S6Osc50o8nCGiyOtYWlewq2QKXVo69V_1hkK0WeFxprG387m1JY619uKGK0Kynb7Jdb7plnUWfzKgV0UP9L7RIA4E2KnupKhIr5aYQ=@urja.dev>
On Fri, Jul 19, 2024 at 11:09:23AM +0000, Urja wrote:
> Hi,
>
> Trying to start KDE Plasma (startplasma-wayland) on my ASUS C201 (RK3288) with any kernel since "ARM: 9358/2: Implement PAN for LPAE by TTBR0 page table walks disablement"* and CONFIG_ARM_PAN=y (enabled by default for an LPAE kernel in that commit) causes a segfault.
This is a known bug. Make sure you have this applied:
eebadafc3b14 ("ARM: 9398/1: Fix userspace enter on LPAE with CC_OPTIMIZE_FOR_SIZE=y")
Thanks.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!
prev parent reply other threads:[~2024-07-29 8:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-19 11:09 Userspace programs segfaulting since CONFIG_ARM_PAN was introduced for LPAE Urja
2024-07-29 8:51 ` Russell King (Oracle) [this message]
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