From patchwork Fri Nov 1 14:09:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 11223197 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C67651515 for ; Fri, 1 Nov 2019 14:10:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9CF652085B for ; Fri, 1 Nov 2019 14:10:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9CF652085B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 714226B0266; Fri, 1 Nov 2019 10:10:16 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 6EDE36B0269; Fri, 1 Nov 2019 10:10:16 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 602AF6B026A; Fri, 1 Nov 2019 10:10:16 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0106.hostedemail.com [216.40.44.106]) by kanga.kvack.org (Postfix) with ESMTP id 3D2936B0266 for ; Fri, 1 Nov 2019 10:10:16 -0400 (EDT) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id DC020180AD837 for ; Fri, 1 Nov 2019 14:10:15 +0000 (UTC) X-FDA: 76107893190.15.fear24_3c676a2aee804 X-Spam-Summary: 2,0,0,10191aa4436c632a,d41d8cd98f00b204,steven.price@arm.com,:akpm@linux-foundation.org::steven.price@arm.com:luto@kernel.org:ard.biesheuvel@linaro.org:arnd@arndb.de:bp@alien8.de:catalin.marinas@arm.com:dave.hansen@linux.intel.com:mingo@redhat.com:james.morse@arm.com:jglisse@redhat.com:peterz@infradead.org:tglx@linutronix.de:will@kernel.org:x86@kernel.org:hpa@zytor.com:linux-arm-kernel@lists.infradead.org:linux-kernel@vger.kernel.org:mark.rutland@arm.com:kan.liang@linux.intel.com:palmer@sifive.com:aou@eecs.berkeley.edu:linux-riscv@lists.infradead.org:alex@ghiti.fr:zong.li@sifive.com:paul.walmsley@sifive.com,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1311:1314:1345:1359:1431:1437:1515:1534:1541:1711:1730:1747:1777:1792:2393:2559:2562:2730:2892:3138:3139:3140:3141:3142:3353:3865:3866:3867:3870:3871:3872:4321:4605:5007:6117:6261:6742:6743:7903:8634:10004:11026:11657:11658:11914:12043:12296:12297:12517:12519:12555:12895:12986:13069:13311:13357:13894:14 096:1418 X-HE-Tag: fear24_3c676a2aee804 X-Filterd-Recvd-Size: 3929 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Fri, 1 Nov 2019 14:10:14 +0000 (UTC) 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 89BFF337; Fri, 1 Nov 2019 07:10:14 -0700 (PDT) Received: from e112269-lin.cambridge.arm.com (e112269-lin.cambridge.arm.com [10.1.194.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 51CDF3F718; Fri, 1 Nov 2019 07:10:11 -0700 (PDT) From: Steven Price To: Andrew Morton , 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?b?SsOpcsO0bWUgR2xpc3Nl?= , 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, Alexandre Ghiti , Zong Li , Paul Walmsley Subject: [PATCH v15 07/23] riscv: mm: Add p?d_leaf() definitions Date: Fri, 1 Nov 2019 14:09:26 +0000 Message-Id: <20191101140942.51554-8-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191101140942.51554-1-steven.price@arm.com> References: <20191101140942.51554-1-steven.price@arm.com> MIME-Version: 1.0 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_leaf() functions/macros. For riscv a page is a leaf page when it has a read, write or execute bit set on it. CC: Palmer Dabbelt CC: Albert Ou CC: linux-riscv@lists.infradead.org Reviewed-by: Alexandre Ghiti Reviewed-by: Zong Li Acked-by: Paul Walmsley # for arch/riscv 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 74630989006d..4c4d2c65ba6c 100644 --- a/arch/riscv/include/asm/pgtable-64.h +++ b/arch/riscv/include/asm/pgtable-64.h @@ -43,6 +43,13 @@ static inline int pud_bad(pud_t pud) return !pud_present(pud); } +#define pud_leaf pud_leaf +static inline int pud_leaf(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 7255f2d8395b..3aa972dda75a 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -130,6 +130,13 @@ static inline int pmd_bad(pmd_t pmd) return !pmd_present(pmd); } +#define pmd_leaf pmd_leaf +static inline int pmd_leaf(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;