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[220.132.236.182]) by smtp.gmail.com with ESMTPSA id e10sm2590901pfj.7.2020.01.10.02.46.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Jan 2020 02:46:37 -0800 (PST) From: Greentime Hu To: greentime.hu@sifive.com, greentime@kernel.org, anup@brainfault.org, palmer@dabbelt.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, rppt@linux.ibm.com, gkulkarni@marvell.com, will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, paul.walmsley@sifive.com, hch@lst.de Subject: [RFC PATCH v2 1/4] riscv: Add support pte_protnone and pmd_protnone if CONFIG_NUMA_BALANCING Date: Fri, 10 Jan 2020 18:46:24 +0800 Message-Id: <1ff7e57f16cb43c8816b90716a872b8f0f101c42.1577694824.git.greentime.hu@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These two functions are used to distinguish between PROT_NONENUMA protections and hinting fault protections. Signed-off-by: Greentime Hu --- arch/riscv/include/asm/pgtable.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 36ae01761352..9650a4ce073e 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -166,6 +166,11 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd) return (unsigned long)pfn_to_virt(pmd_val(pmd) >> _PAGE_PFN_SHIFT); } +static inline pte_t pmd_pte(pmd_t pmd) +{ + return __pte(pmd_val(pmd)); +} + /* Yields the page frame number (PFN) of a page table entry */ static inline unsigned long pte_pfn(pte_t pte) { @@ -279,6 +284,21 @@ static inline pte_t pte_mkhuge(pte_t pte) return pte; } +#ifdef CONFIG_NUMA_BALANCING +/* + * See the comment in include/asm-generic/pgtable.h + */ +static inline int pte_protnone(pte_t pte) +{ + return (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROT_NONE)) == _PAGE_PROT_NONE; +} + +static inline int pmd_protnone(pmd_t pmd) +{ + return pte_protnone(pmd_pte(pmd)); +} +#endif + /* Modify page protection bits */ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { -- 2.17.1