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[217.140.101.70]) by mx.google.com with ESMTP id i22si752281edv.214.2019.03.06.07.51.06 for ; Wed, 06 Mar 2019 07:51:06 -0800 (PST) Received-SPF: pass (google.com: domain of steven.price@arm.com designates 217.140.101.70 as permitted sender) client-ip=217.140.101.70; Authentication-Results: mx.google.com; spf=pass (google.com: domain of steven.price@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=steven.price@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 54ABF165C; Wed, 6 Mar 2019 07:51:05 -0800 (PST) Received: from e112269-lin.arm.com (e112269-lin.cambridge.arm.com [10.1.196.69]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A34033F703; Wed, 6 Mar 2019 07:51:01 -0800 (PST) From: Steven Price To: linux-mm@kvack.org Cc: Steven Price , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Dave Hansen , Ingo Molnar , James Morse , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Peter Zijlstra , Thomas Gleixner , Will Deacon , x86@kernel.org, "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland , "Liang, Kan" , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org Subject: [PATCH v4 05/19] riscv: mm: Add p?d_large() definitions Date: Wed, 6 Mar 2019 15:50:17 +0000 Message-Id: <20190306155031.4291-6-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190306155031.4291-1-steven.price@arm.com> References: <20190306155031.4291-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: walk_page_range() is going to be allowed to walk page tables other than those of user space. For this it needs to know when it has reached a 'leaf' entry in the page tables. This information is provided by the p?d_large() functions/macros. For riscv a page is large when it has a read, write or execute bit set on it. CC: Palmer Dabbelt CC: Albert Ou CC: linux-riscv@lists.infradead.org Signed-off-by: Steven Price --- arch/riscv/include/asm/pgtable-64.h | 7 +++++++ arch/riscv/include/asm/pgtable.h | 7 +++++++ 2 files changed, 14 insertions(+) diff --git a/arch/riscv/include/asm/pgtable-64.h b/arch/riscv/include/asm/pgtable-64.h index 7aa0ea9bd8bb..73747d9d7c66 100644 --- a/arch/riscv/include/asm/pgtable-64.h +++ b/arch/riscv/include/asm/pgtable-64.h @@ -51,6 +51,13 @@ static inline int pud_bad(pud_t pud) return !pud_present(pud); } +#define pud_large pud_large +static inline int pud_large(pud_t pud) +{ + return pud_present(pud) + && (pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); +} + static inline void set_pud(pud_t *pudp, pud_t pud) { *pudp = pud; diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 16301966d65b..c66e2a69215f 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -111,6 +111,13 @@ static inline int pmd_bad(pmd_t pmd) return !pmd_present(pmd); } +#define pmd_large pmd_large +static inline int pmd_large(pmd_t pmd) +{ + return pmd_present(pmd) + && (pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); +} + static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) { *pmdp = pmd; -- 2.20.1