From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2ADD495510; Wed, 1 Jul 2026 16:08:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782922134; cv=none; b=EFXgbkRiaFZ1lURj0SddyAAj1FH9g1JbquI6I2g48d6/Vyk3ElZ0ofxY2h3qsQemGl7klKwn8EJBjrUDoLidpz2PbC3rTQ3yHN2UhwglGNXZY3ptRAkJI1cHVORcehafZMtjwr1nR84CnAqonm4vtwZichgaO9LepJwSOX0JV6Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782922134; c=relaxed/simple; bh=AJ0pMXg4zNx6iBLjC5rKIhxKfi1x1FCeAKc7Ze03gg0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=hW1QzASw2781WCV5nLyj/DsZ0XxQtfjPwlMlLwSm1wjVtEvFpmNZjsMcFyE0Yt5CoyK3bn58w2GvbNezBnQBm3c8ONijoyW3UDO/YaRfG2dMF2pI2CjPolr4CPPXpWjqPSgCaNvaIgRUxGNjM1TMXOgwYgRzIQQfZgdwhI5RQn8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gDKGsoSu; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gDKGsoSu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D934C1F000E9; Wed, 1 Jul 2026 16:08:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782922132; bh=4svri2kKaEffu19Oke4jQpVS/UKAzGmltv6WEa4/xwk=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=gDKGsoSuoX4y4+MxDGlxgvPDvWfjgJkJqbd4Z9YYZpHz8hxnq0PT2TzxefRMxVAa0 LLxc0gfXz+qgZo48WkXD5vaITziU/QoAPNRgdHmevJCl3HtlfFa8V8lnaN8/lPSoPG p5iKl8CJsukVWbfhFl8WXyUsjdOfJnyUyxwTN8lF7AaXcwOjfoawTFhSMighESuZ5r YEe/SUMdBjlGtyX5rVRWovUn0rzPNWNqDvBxJdBLtHjc3eCV8Gyyi7+WN47vgNUBTm 7jd0LJecHEfHZckFVTdLIX5rxFoXf27BDwP0eu3Fdmr93ZkcEmdf6rFk/LkbhdGvTl McmYvWLdY5ukQ== From: Thierry Reding Date: Wed, 01 Jul 2026 18:08:15 +0200 Subject: [PATCH v3 04/11] arm64/mm: Add set_memory_device() and set_memory_normal() Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260701-tegra-vpr-v3-4-d80f7b871bb4@nvidia.com> References: <20260701-tegra-vpr-v3-0-d80f7b871bb4@nvidia.com> In-Reply-To: <20260701-tegra-vpr-v3-0-d80f7b871bb4@nvidia.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , Jonathan Hunter , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Sowjanya Komatineni , Luca Ceresoli , Mikko Perttunen , Yury Norov , Rasmus Villemoes , Russell King , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Marek Szyprowski , Robin Murphy , Sumit Semwal , Benjamin Gaignard , Brian Starkey , John Stultz , "T.J. Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Catalin Marinas , Will Deacon Cc: Thierry Reding , devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux.dev, linaro-mm-sig@lists.linaro.org, linux-trace-kernel@vger.kernel.org, Thierry Reding , Chun Ng X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2551; i=treding@nvidia.com; h=from:subject:message-id; bh=G1LDIXegX2JsIizEgI4OVqdVWI4H2qUqnDjgZImq5XA=; b=owEBbQKS/ZANAwAKAd0jrNd/PrOhAcsmYgBqRTuFpaJPLzRyixdVeDrzwyjHz8TdwopYr+lh2 QtMV/FTH92JAjMEAAEKAB0WIQSI6sMIAUnM98CNyJ/dI6zXfz6zoQUCakU7hQAKCRDdI6zXfz6z oYHgD/9DX2Si/rXRk+uCTzgU4FnEHIC0/836XVX0PwE8Ma9Ts3J4Ee1/5z4Bu7fsEBHy4B5nsYJ 5HY7goBFPkb8aaQuFHph3Elh5ghlrSLBKMwuM9bif/EjTZCy4cJvzDmW8MoMxwShmrhItxDbn2m wDriAvc09QSZbZJXHGas0SwlZbJrBfz/L7SGZpaHlEuK0/18CNrzsihbkF03qYcRhI+bIbyKp6x OCCsizV8aNU6Rdv6A76LYBE1opYbwXE3hBvSoEb0rdjK4pwc1M9VrGaANO2WFhSqtp3p329kiCR t3M6Tcq9VW6OhNoVWjtbxSYsH4AyO/4GImvYOoBBZmABxd3BYGtDyx9qiSxwTnhIOkowltBwDEC r8qcvoNnhp1KLdYBeatZBsgshi++YY+yJDNl7EnvEnHwAsIe0yhIyirKeSf1eTvj/1j3R4XXu5i w2FAaNtlofPzZAj/5aiWC8afRClCczkiKN/T527UzBH93xC/VZFX214PjZama7wpFXNU98m3jDG wFusLKzUfW0WuCLubnpA/ais9Yz78tToqcJdtGAvP/sN+buHI3vnWH44We1nPHow3pKyFXOxngI uPQWSO+yHz2FMkvwy0UDzziwfMQNIiMuzY7FpCKSivOCfIUKmjoYRUW/GLcGJqauaMlNBlwCoMm 8wKqeTnYGGDOWRw== X-Developer-Key: i=treding@nvidia.com; a=openpgp; fpr=88EAC3080149CCF7C08DC89FDD23ACD77F3EB3A1 From: Chun Ng Add helpers to swap PROT_NORMAL and PROT_DEVICE_nGnRnE protection bits on a kernel-linear-map range. Signed-off-by: Chun Ng Signed-off-by: Thierry Reding --- arch/arm64/include/asm/set_memory.h | 2 ++ arch/arm64/mm/pageattr.c | 16 ++++++++++++++++ include/linux/set_memory.h | 11 +++++++++++ 3 files changed, 29 insertions(+) diff --git a/arch/arm64/include/asm/set_memory.h b/arch/arm64/include/asm/set_memory.h index 90f61b17275e..6a7030609789 100644 --- a/arch/arm64/include/asm/set_memory.h +++ b/arch/arm64/include/asm/set_memory.h @@ -10,6 +10,8 @@ bool can_set_direct_map(void); #define can_set_direct_map can_set_direct_map int set_memory_valid(unsigned long addr, int numpages, int enable); +int set_memory_device(unsigned long addr, int numpages); +int set_memory_normal(unsigned long addr, int numpages); int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index bbe98ac9ad8c..871b59a6c9ea 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -251,6 +251,22 @@ int set_memory_valid(unsigned long addr, int numpages, int enable) __pgprot(PTE_PRESENT_VALID_KERNEL)); } +int set_memory_device(unsigned long addr, int numpages) +{ + return __change_memory_common(addr, PAGE_SIZE * numpages, + __pgprot(PROT_DEVICE_nGnRnE), + __pgprot(PROT_NORMAL)); +} +EXPORT_SYMBOL_GPL(set_memory_device); + +int set_memory_normal(unsigned long addr, int numpages) +{ + return __change_memory_common(addr, PAGE_SIZE * numpages, + __pgprot(PROT_NORMAL), + __pgprot(PROT_DEVICE_nGnRnE)); +} +EXPORT_SYMBOL_GPL(set_memory_normal); + int set_direct_map_invalid_noflush(struct page *page) { pgprot_t clear_mask = __pgprot(PTE_PRESENT_VALID_KERNEL); diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h index 3030d9245f5a..abcb11378fdb 100644 --- a/include/linux/set_memory.h +++ b/include/linux/set_memory.h @@ -72,6 +72,17 @@ static inline int clear_mce_nospec(unsigned long pfn) } #endif +#ifndef CONFIG_ARM64 +static inline int set_memory_device(unsigned long addr, int numpages) +{ + return 0; +} +static inline int set_memory_normal(unsigned long addr, int numpages) +{ + return 0; +} +#endif + #ifndef CONFIG_ARCH_HAS_MEM_ENCRYPT static inline int set_memory_encrypted(unsigned long addr, int numpages) { -- 2.54.0