Message ID | 20190227170608.27963-3-steven.price@arm.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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[217.140.101.70]) by mx.google.com with ESMTP id q33si1491179edd.299.2019.02.27.09.06.36 for <linux-mm@kvack.org>; Wed, 27 Feb 2019 09:06:37 -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 EF507A78; Wed, 27 Feb 2019 09:06:35 -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 6E0723F738; Wed, 27 Feb 2019 09:06:32 -0800 (PST) From: Steven Price <steven.price@arm.com> To: linux-mm@kvack.org Cc: Steven Price <steven.price@arm.com>, Andy Lutomirski <luto@kernel.org>, Ard Biesheuvel <ard.biesheuvel@linaro.org>, Arnd Bergmann <arnd@arndb.de>, Borislav Petkov <bp@alien8.de>, Catalin Marinas <catalin.marinas@arm.com>, Dave Hansen <dave.hansen@linux.intel.com>, Ingo Molnar <mingo@redhat.com>, James Morse <james.morse@arm.com>, =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= <jglisse@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Thomas Gleixner <tglx@linutronix.de>, Will Deacon <will.deacon@arm.com>, x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland <Mark.Rutland@arm.com>, "Liang, Kan" <kan.liang@linux.intel.com>, Vineet Gupta <vgupta@synopsys.com>, linux-snps-arc@lists.infradead.org Subject: [PATCH v3 02/34] arc: mm: Add p?d_large() definitions Date: Wed, 27 Feb 2019 17:05:36 +0000 Message-Id: <20190227170608.27963-3-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190227170608.27963-1-steven.price@arm.com> References: <20190227170608.27963-1-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: <linux-mm.kvack.org> X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
Convert x86 & arm64 to use generic page walk
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expand
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On 2/27/19 9:06 AM, Steven Price wrote: > 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 will be provided by the > p?d_large() functions/macros. > > For arc, we only have two levels, so only pmd_large() is needed. > > CC: Vineet Gupta <vgupta@synopsys.com> > CC: linux-snps-arc@lists.infradead.org > Signed-off-by: Steven Price <steven.price@arm.com> Acked-by: vineet Gupta <vgupta@synopsys.com> Thx, -Vineet
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h index cf4be70d5892..0edd27bc7018 100644 --- a/arch/arc/include/asm/pgtable.h +++ b/arch/arc/include/asm/pgtable.h @@ -277,6 +277,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep) #define pmd_none(x) (!pmd_val(x)) #define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK)) #define pmd_present(x) (pmd_val(x)) +#define pmd_large(x) (pmd_val(pmd) & _PAGE_HW_SZ) #define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0) #define pte_page(pte) pfn_to_page(pte_pfn(pte))
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 will be provided by the p?d_large() functions/macros. For arc, we only have two levels, so only pmd_large() is needed. CC: Vineet Gupta <vgupta@synopsys.com> CC: linux-snps-arc@lists.infradead.org Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arc/include/asm/pgtable.h | 1 + 1 file changed, 1 insertion(+)