From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 313DB481FCF; Wed, 2 Sep 2026 11:57:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788350257; cv=none; b=LrRBamQITnRi3O5QdhDFi7bLXy/jM6j5QbptCo2VxaJDty+GByjG1YWhlZn1yA64usaIsjX+HRtscFuEXREVKgT3wq3z9xkW9CIofnrtCDQvrbVUl8bVNklYupcoDeaiLI1NYi0pZKbaOEmz3kOeEmqDQBK8tOqvWp5iWtumUzU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788350257; c=relaxed/simple; bh=AEzoNqJWVGEbFZMm+Tu7vEHKp4NF/8YTbhQnUKsI3m4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sohv0TeDywwQUqllP8ovp0K1u3tjPjvsF/edPhknDfC8Y7SXxEPWblYbm8oOVcCayaR8hCklBZA9uez5/ZuhtlCZCDun+FtLfdrxS0ljPpYyCsJoiKuZIA6fwPcgGDJ5V+P/FXFH7DmwfwRLomIgBsJHtHgbUrmxDwESRkQtwBk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=rDhX00MP; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="rDhX00MP" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id F23C61682; Wed, 2 Sep 2026 04:57:16 -0700 (PDT) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9A6603F85F; Wed, 2 Sep 2026 04:57:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1788350240; bh=AEzoNqJWVGEbFZMm+Tu7vEHKp4NF/8YTbhQnUKsI3m4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=rDhX00MPIeeIR4/aNEALnSD180H0Rq4w476QmcrQalugOcR068b6Ssx4dUNN+D+7M NTCmQ7okmA3nur8IK/sSj2IT8efBSr5H5MBtXxSIGdE/mWPzf/LtQtpk5//WWhwMpl QDzgztTq9IwHHlxrFQT2hNqr1xsq+hTgnATXvCsM= From: Yeoreum Yun Date: Wed, 02 Sep 2026 12:56:08 +0100 Subject: [PATCH RFC v3 06/21] mm/pgtable: define (pgd|p4d|pud)_leaf() for folded page tables Precedence: bulk X-Mailing-List: kvm@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: <20260902-dummy_ptxp3-v3-6-5d8f5b17c25c@arm.com> References: <20260902-dummy_ptxp3-v3-0-5d8f5b17c25c@arm.com> In-Reply-To: <20260902-dummy_ptxp3-v3-0-5d8f5b17c25c@arm.com> To: Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2645; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=YBS0Wsk+xkEZqH0tYrGlw8G+wUvAR+VIvzuFsaQMCdU=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBqmA7kbsa357ogNAOMBFKPrS36nRaOAW3NnTvXN g1Fn0QQqKWJAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCapgO5AAKCRBt1cPRWsUx MzDoC/9z4m8r6ojRFiRZMEOkVvdnc4vvf7uPxKhHnjXcv6Cg2C8vEkuYn9TPkuh9PTW9ENWRhzb yJiujsYNPfHUzu16XkVVMy03PnWyfefbhdbj6XnqppUsLXXGgnYGXwjKKguXzhGP9VZl0Xvizcc xs3I8jR/vRFlKh/JJxcQv+mTbY4iTYZg9PurZ/0XgJhnJ8xvns/Qv4R9fdQpKLYxo2p5gJOMlQU 9bVt+T4JpLNiZvDYEVumcxzuFxzeQkKUGxhZ7Y3/OCO4OuGo1rE5jpU9q+IgA7ojcbXZ+gaaOjt cpY1tD4oA5vYqZ0r5tgWm9CnO6QEkhy7W89kmB54q27+Po92E71tEXZSOAMS6zs/IBgIIu9bF9g 8tyrLcGNPySE/WE3c6HD5TBY6cn2nDM3GlvOEwlYAs3SLBpDTj/XOYK5rgt/2dP5snbu273q/s1 1YrNxbGBvCWvC32W1ZWq6nQkFR/ucefGCfdA5vSU79pVeB9Z0XlfeqezSFZiqsSHq5cr4= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 From: "David Hildenbrand (Arm)" Define (pgd|p4d|pud)_leaf(), hard-coding it to "false". Note that it's missed to define pud_leaf() before, allowing architectures to unknowingly overwrite it. Still use static inline functions (type checking), and while at it, just use "bool" as a return value. Signed-off-by: David Hildenbrand (Arm) --- include/asm-generic/pgtable-nop4d.h | 3 +++ include/asm-generic/pgtable-nopmd.h | 3 ++- include/asm-generic/pgtable-nopud.h | 3 +++ 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/include/asm-generic/pgtable-nop4d.h b/include/asm-generic/pgtable-nop4d.h index 1cf739ee38aa..c6a5a43899b5 100644 --- a/include/asm-generic/pgtable-nop4d.h +++ b/include/asm-generic/pgtable-nop4d.h @@ -22,6 +22,9 @@ static inline int pgd_none(pgd_t pgd) { return 0; } static inline int pgd_bad(pgd_t pgd) { return 0; } static inline int pgd_present(pgd_t pgd) { return 1; } static inline void pgd_clear(pgd_t *pgd) { } +static inline bool pgd_leaf(pgd_t pgd) { return false; } +#define pgd_leaf pgd_leaf +#define p4d_ERROR(p4d) (pgd_ERROR((p4d).pgd)) #define pgd_populate(mm, pgd, p4d) do { } while (0) #define pgd_populate_safe(mm, pgd, p4d) do { } while (0) diff --git a/include/asm-generic/pgtable-nopmd.h b/include/asm-generic/pgtable-nopmd.h index ff4235cf84d7..4e5aaf253b6a 100644 --- a/include/asm-generic/pgtable-nopmd.h +++ b/include/asm-generic/pgtable-nopmd.h @@ -31,7 +31,8 @@ static inline int pud_none(pud_t pud) { return 0; } static inline int pud_bad(pud_t pud) { return 0; } static inline int pud_present(pud_t pud) { return 1; } static inline int pud_user(pud_t pud) { return 0; } -static inline int pud_leaf(pud_t pud) { return 0; } +static inline bool pud_leaf(pud_t pud) { return false; } +#define pud_leaf pud_leaf static inline void pud_clear(pud_t *pud) { } #define pud_populate(mm, pmd, pte) do { } while (0) diff --git a/include/asm-generic/pgtable-nopud.h b/include/asm-generic/pgtable-nopud.h index eedee8e3ad68..6c9bca78047c 100644 --- a/include/asm-generic/pgtable-nopud.h +++ b/include/asm-generic/pgtable-nopud.h @@ -29,6 +29,9 @@ static inline int p4d_none(p4d_t p4d) { return 0; } static inline int p4d_bad(p4d_t p4d) { return 0; } static inline int p4d_present(p4d_t p4d) { return 1; } static inline void p4d_clear(p4d_t *p4d) { } +static inline bool p4d_leaf(p4d_t p4d) { return false; } +#define p4d_leaf p4d_leaf +#define pud_ERROR(pud) (p4d_ERROR((pud).p4d)) #define p4d_populate(mm, p4d, pud) do { } while (0) #define p4d_populate_safe(mm, p4d, pud) do { } while (0) -- 2.43.0