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Date: Wed, 25 Mar 2026 12:57:14 -0600 (MDT)
From: Paul Walmsley <pjw@kernel.org>
To: Zishun Yi <vulab@iscas.ac.cn>
cc: Paul Walmsley <pjw@kernel.org>, Palmer Dabbelt <palmer@dabbelt.com>, 
    Albert Ou <aou@eecs.berkeley.edu>, Alexandre Ghiti <alex@ghiti.fr>, 
    Deepak Gupta <debug@rivosinc.com>, Zong Li <zong.li@sifive.com>, 
    Thomas Gleixner <tglx@kernel.org>, Charlie Jenkins <charlie@rivosinc.com>, 
    =?ISO-8859-15?Q?Cl=E9ment_L=E9ger?= <cleger@rivosinc.com>, 
    Nam Cao <namcao@linutronix.de>, Samuel Holland <samuel.holland@sifive.com>, 
    Simon Schuster <schuster.simon@siemens-energy.com>, 
    linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] riscv: Reset pmm when PR_TAGGED_ADDR_ENABLE is not set
In-Reply-To: <20260322160022.21908-1-vulab@iscas.ac.cn>
Message-ID: <d0a66d50-cfa8-2260-2185-12c945c8e6f2@kernel.org>
References: <20260322160022.21908-1-vulab@iscas.ac.cn>
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On Mon, 23 Mar 2026, Zishun Yi wrote:

> In set_tagged_addr_ctrl(), when PR_TAGGED_ADDR_ENABLE is not set, pmlen
> is correctly set to 0, but it forgets to reset pmm. This results in the
> CPU pmm state not corresponding to the software pmlen state.
> 
> Fix this by resetting pmm along with pmlen.
> 
> Fixes: 2e1743085887 ("riscv: Add support for the tagged address ABI")
> Signed-off-by: Zishun Yi <vulab@iscas.ac.cn>

Thanks, queued for v7.0-rc.


- Paul