From patchwork Fri Jan 27 09:10:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sia Jee Heng X-Patchwork-Id: 13118269 X-Patchwork-Delegate: palmer@dabbelt.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 88949C38142 for ; Fri, 27 Jan 2023 09:11:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=rzI9pYLL48FICCJGimptH5Mp9ctDDGW2TVROEq+/vTU=; b=RsVqYQGnVvy6gI cIDUjE5wOuoRpJhOwzie/MAAFsXdo5T06//4RatoCEALpmZunqbhRcysuaoXX4s7O90kiYaDVaCzm Xa7Dv5nvNK2KpVtXOz4FslHlPe+zG0J4VQP2Bj7ruvr/IAthLAaFqU7cZsYG+N/NJ7tZ2PKUcHASn DmNAEad/+azGztj+5ujI1+eIeGQIgCWZMz1fVI7ettk/YGaFRgvUG9Gr+WsJo0LpY21x70ZXIobin zPWjp9w0eIeT5rpHXZLKIz6FbKwfPz9vTkFK9XyNLtbGjqKwbbkcyiz+kx/3ZUqB1kzpKQiKMr3Vq Bb8gU/j0PxTPyPXdgj8w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pLKlz-00Daso-LP; Fri, 27 Jan 2023 09:11:51 +0000 Received: from fd01.gateway.ufhost.com ([61.152.239.71]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pLKlu-00Daoe-QB for linux-riscv@lists.infradead.org; Fri, 27 Jan 2023 09:11:48 +0000 Received: from EXMBX166.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX166", Issuer "EXMBX166" (not verified)) by fd01.gateway.ufhost.com (Postfix) with ESMTP id AE99224E02F; Fri, 27 Jan 2023 17:11:27 +0800 (CST) Received: from EXMBX066.cuchost.com (172.16.7.66) by EXMBX166.cuchost.com (172.16.6.76) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 27 Jan 2023 17:11:27 +0800 Received: from jsia-virtual-machine.localdomain (60.50.196.81) by EXMBX066.cuchost.com (172.16.6.66) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 27 Jan 2023 17:11:23 +0800 From: Sia Jee Heng To: , , CC: , , , , Subject: [PATCH v3 3/4] RISC-V: mm: Enable huge page support to kernel_page_present() function Date: Fri, 27 Jan 2023 17:10:50 +0800 Message-ID: <20230127091051.1465278-4-jeeheng.sia@starfivetech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230127091051.1465278-1-jeeheng.sia@starfivetech.com> References: <20230127091051.1465278-1-jeeheng.sia@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [60.50.196.81] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX066.cuchost.com (172.16.6.66) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230127_011147_019400_CE1A450A X-CRM114-Status: UNSURE ( 8.89 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Currently kernel_page_present() function doesn't support huge page detection causes the function to mistakenly return false to the hibernation core. Add huge page detection to the function to solve the problem. Signed-off-by: Sia Jee Heng Reviewed-by: Ley Foon Tan Reviewed-by: Mason Huo --- arch/riscv/mm/pageattr.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index 86c56616e5de..792b8d10cdfc 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -221,14 +221,20 @@ bool kernel_page_present(struct page *page) p4d = p4d_offset(pgd, addr); if (!p4d_present(*p4d)) return false; + if (p4d_leaf(*p4d)) + return true; pud = pud_offset(p4d, addr); if (!pud_present(*pud)) return false; + if (pud_leaf(*pud)) + return true; pmd = pmd_offset(pud, addr); if (!pmd_present(*pmd)) return false; + if (pmd_leaf(*pmd)) + return true; pte = pte_offset_kernel(pmd, addr); return pte_present(*pte);