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From: Karl Mehltretter <kmehltretter@gmail.com>
To: Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	 Albert Ou <aou@eecs.berkeley.edu>
Cc: "Alexandre Ghiti" <alex@ghiti.fr>,
	"Mike Rapoport" <rppt@kernel.org>,
	"Luis Chamberlain" <mcgrof@kernel.org>,
	"Björn Töpel" <bjorn@kernel.org>,
	linux-riscv@lists.infradead.org, bpf@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] riscv: mm: Pre-allocate module page tables for execmem
Date: Sat, 14 Nov 2026 10:29:29 +0100	[thread overview]
Message-ID: <avgpqlpWf01mwo9P@gmail.com> (raw)
In-Reply-To: <20261016102847.96530-1-kmehltretter@gmail.com>

On Fri, Oct 16, 2026 at 12:28:47PM +0100, Karl Mehltretter wrote:
>   Unable to handle kernel paging request ...
>   [ffffffff78000000] pgd=0000000000000000
>   ...
>   bpf_jit_fill_hole_with_zero
>   bpf_prog_pack_alloc
> 
> Use CONFIG_EXECMEM for the module-range pre-allocation, as powerpc does
> for its execmem page-table setup. Both CONFIG_MODULES and CONFIG_BPF_JIT
> select it.
> 
> Fixes: 2c9e5d4a0082 ("bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of")
> Cc: stable@vger.kernel.org
> Assisted-by: LLM
> Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> Acked-by: Björn Töpel <bjorn@kernel.org>
> ---
> Changes in v2:
> - State that the BPF JIT region lies inside the module region (Mike).
> - Add Acked-by tags from Mike Rapoport and Björn Töpel.
> - No code changes from v1.
> 

A friendly ping on v2 of this RV64 execmem page-table fix.

Is anything else needed from my side?

Thanks,
Karl

WARNING: multiple messages have this Message-ID (diff)
From: Karl Mehltretter <kmehltretter@gmail.com>
To: Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	 Albert Ou <aou@eecs.berkeley.edu>
Cc: "Alexandre Ghiti" <alex@ghiti.fr>,
	"Mike Rapoport" <rppt@kernel.org>,
	"Luis Chamberlain" <mcgrof@kernel.org>,
	"Björn Töpel" <bjorn@kernel.org>,
	linux-riscv@lists.infradead.org, bpf@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] riscv: mm: Pre-allocate module page tables for execmem
Date: Sat, 14 Nov 2026 10:29:29 +0100	[thread overview]
Message-ID: <avgpqlpWf01mwo9P@gmail.com> (raw)
In-Reply-To: <20261016102847.96530-1-kmehltretter@gmail.com>

On Fri, Oct 16, 2026 at 12:28:47PM +0100, Karl Mehltretter wrote:
>   Unable to handle kernel paging request ...
>   [ffffffff78000000] pgd=0000000000000000
>   ...
>   bpf_jit_fill_hole_with_zero
>   bpf_prog_pack_alloc
> 
> Use CONFIG_EXECMEM for the module-range pre-allocation, as powerpc does
> for its execmem page-table setup. Both CONFIG_MODULES and CONFIG_BPF_JIT
> select it.
> 
> Fixes: 2c9e5d4a0082 ("bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of")
> Cc: stable@vger.kernel.org
> Assisted-by: LLM
> Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> Acked-by: Björn Töpel <bjorn@kernel.org>
> ---
> Changes in v2:
> - State that the BPF JIT region lies inside the module region (Mike).
> - Add Acked-by tags from Mike Rapoport and Björn Töpel.
> - No code changes from v1.
> 

A friendly ping on v2 of this RV64 execmem page-table fix.

Is anything else needed from my side?

Thanks,
Karl

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http://lists.infradead.org/mailman/listinfo/linux-riscv

  reply	other threads:[~2026-11-14  9:29 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-16 10:28 [PATCH v2] riscv: mm: Pre-allocate module page tables for execmem Karl Mehltretter
2026-10-16 10:28 ` Karl Mehltretter
2026-11-14  9:29 ` Karl Mehltretter [this message]
2026-11-14  9:29   ` Karl Mehltretter

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