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Wed, 8 Nov 2023 17:20:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699464024; bh=prYzLaZu06WtQmNg4/UT6PWTH9U6sgDBvBDcv1Ulv/8=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=JvZes0SyVw4VZJlD4zFojOe2NBOedMICGWUUbV7VYo4k58CokiZWkkcipReuSdsNn VKlEcNHWaR+GOLRUs3gGoFR3tmk7uhJACdbJHYkKvKs17gnNNkBAhm88MjiFJzvZed kF1jaHgGTAqgRHWq71DYq8Ougef2P5sR/Wcd2mi6m+Y7NkQLZDPQIoSTN9DggqhQ3z PunUnQuLe+KIozqk1SvZQsioWbgX3LoVNI/hbXmNJMJhj2EGfCI2Tu3EazDtQRBI6F PbYUuPW+3uwX8Wr2Q6N+Ov2TOIlyOC0uD3nakVfFff5T12qDGt09EJyAn4MXwO6IIM oOuA3gSJxuLHA== Received: from aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (localhost.localdomain [127.0.0.1]) by aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (Postfix) with ESMTP id BBA39E00086; Wed, 8 Nov 2023 17:20:24 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH RESEND v2 0/2] riscv: Fix set_memory_XX() and set_direct_map_XX() From: patchwork-bot+linux-riscv@kernel.org Message-Id: <169946402476.8523.11934307334970092099.git-patchwork-notify@kernel.org> Date: Wed, 08 Nov 2023 17:20:24 +0000 References: <20231108075930.7157-1-alexghiti@rivosinc.com> In-Reply-To: <20231108075930.7157-1-alexghiti@rivosinc.com> To: Alexandre Ghiti Cc: linux-riscv@lists.infradead.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, rppt@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 4B16E1A0025 X-Stat-Signature: cqdas45gtk4swxza1fcjp1kd3fc9u5rf X-HE-Tag: 1699464028-175157 X-HE-Meta: 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 7ucAN+SH Ev3uY8/0tlMV4bt8TbFGVkg9/iDm3nuapsexW1Pgc5ravZc/ph86JqgO7yL4H43vgKYF8EmpMkBa0DhqcDFb7xoGsf4U/VfuYe3D9rGABpkq+TSeaxDEpxLAEI6lHiOZEgTI3i9aiM7CdufQr6005wdQxUNEn4cklAF9BZ943i3xlsHJOHqnhQRqcDQlv5J1Pc1oylWfxjoYGkDBSRdmbyZgkRw7ghfGPmPLWXX3b8tQkCFhXdxpjN6WSo2qHtVI8aH/mJOr1eKne6sB5V1//GlsBnz+34S6eo4fCYG3Jn1lL84T7yYUgKZqqHvOoiiAZxjOALieYA7Lb82LQH45L39wTOQqq5d1XtOn9UXtYTXQzwQp5xPrcGwmUrLmZqtig9jWI X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello: This series was applied to riscv/linux.git (for-next) by Palmer Dabbelt : On Wed, 8 Nov 2023 08:59:28 +0100 you wrote: > Those 2 patches fix the set_memory_XX() and set_direct_map_XX() APIs, which > in turn fix STRICT_KERNEL_RWX and memfd_secret(). Those were broken since the > permission changes were not applied to the linear mapping because the linear > mapping is mapped using hugepages and walk_page_range_novma() does not split > such mappings. > > To fix that, patch 1 disables PGD mappings in the linear mapping as it is > hard to propagate changes at this level in *all* the page tables, this has the > downside of disabling PMD mapping for sv32 and PUD (1GB) mapping for sv39 in > the linear mapping (for specific kernels, we could add a Kconfig to enable > ARCH_HAS_SET_DIRECT_MAP and STRICT_KERNEL_RWX if needed, I'm pretty sure we'll > discuss that). > > [...] Here is the summary with links: - [RESEND,v2,1/2] riscv: Don't use PGD entries for the linear mapping https://git.kernel.org/riscv/c/629db01c64ff - [RESEND,v2,2/2] riscv: Fix set_memory_XX() and set_direct_map_XX() by splitting huge linear mappings https://git.kernel.org/riscv/c/311cd2f6e253 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html