From patchwork Thu Aug 10 17:09:05 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Punit Agrawal X-Patchwork-Id: 9894279 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 722CF60352 for ; Thu, 10 Aug 2017 17:13:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 59F6F286A2 for ; Thu, 10 Aug 2017 17:13:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4E98E28908; Thu, 10 Aug 2017 17:13:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C023028B6B for ; Thu, 10 Aug 2017 17:13:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=KB9bKgBptbc1x/i4Zbq3lKlJpbWUtNN6BTngjIZOfr8=; b=sXycGY/OerJRxEXvtkyk+00Xw9 Jzbgzdarjc1tEmLtpZ1ioeXbIyMAcHbtqs2bHmxahLvPnmv77tVRGhAYoRfVV1MGNYHpAxWR+/V1A u3sLFpYvu6zkb6dGAUKv6Rt8pjfTATLUBd3GLYiiew4XoE5cbLxr4yx8CqLmrdlsCdRAs+Zh/GvAH x/pBGjVZlIaBqwxPhNbjen9Xj++wpoeN9WBvzrUhOjQ4/y++it6aIvmyiqKLVlTWc8KLCRvWghAMp vn4HgN3mqvmdd9rg4tAq2h0nEJ+qrRuuREyk1AIQwpiHuWMdKRLiO1eYOMtJq/31rWdH9+JLDu8pQ ADcMALvg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dfr1Y-0005Uo-7Z; Thu, 10 Aug 2017 17:13:32 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dfqzj-0004A5-Pc for linux-arm-kernel@lists.infradead.org; Thu, 10 Aug 2017 17:12:19 +0000 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 C043115AD; Thu, 10 Aug 2017 10:11:23 -0700 (PDT) Received: from localhost (e105922-lin.cambridge.arm.com [10.1.206.107]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 649833F540; Thu, 10 Aug 2017 10:11:23 -0700 (PDT) From: Punit Agrawal To: will.deacon@arm.com, catalin.marinas@arm.com Subject: [PATCH v6 8/9] arm64: Re-enable support for contiguous hugepages Date: Thu, 10 Aug 2017 18:09:05 +0100 Message-Id: <20170810170906.30772-9-punit.agrawal@arm.com> X-Mailer: git-send-email 2.13.2 In-Reply-To: <20170810170906.30772-1-punit.agrawal@arm.com> References: <20170810170906.30772-1-punit.agrawal@arm.com> X-ARM-No-Footer: FoSSMail X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170810_101140_574085_DBB2EC6B X-CRM114-Status: UNSURE ( 8.72 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, linux-mm@kvack.org, Punit Agrawal , linux-arm-kernel@lists.infradead.org, steve.capper@arm.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP also known as - Revert "Revert "Revert "arm64: hugetlb: partial revert of 66b3923a1a0f""" Now that our hugetlb implementation is compliant with the break-before-make requirements of the architecture and we have addressed some of the issues in core code required for properly dealing with hardware poisoning of contiguous hugepages let's re-enable support for contiguous hugepages. This reverts commit 6ae979ab39a368c18ceb0424bf824d172d6ab56f. Signed-off-by: Punit Agrawal --- arch/arm64/mm/hugetlbpage.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index f6b2ef23285d..273f126072e4 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -403,6 +403,10 @@ static __init int setup_hugepagesz(char *opt) hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT); } else if (ps == PUD_SIZE) { hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT); + } else if (ps == (PAGE_SIZE * CONT_PTES)) { + hugetlb_add_hstate(CONT_PTE_SHIFT); + } else if (ps == (PMD_SIZE * CONT_PMDS)) { + hugetlb_add_hstate((PMD_SHIFT + CONT_PMD_SHIFT) - PAGE_SHIFT); } else { hugetlb_bad_size(); pr_err("hugepagesz: Unsupported page size %lu K\n", ps >> 10); @@ -411,3 +415,13 @@ static __init int setup_hugepagesz(char *opt) return 1; } __setup("hugepagesz=", setup_hugepagesz); + +#ifdef CONFIG_ARM64_64K_PAGES +static __init int add_default_hugepagesz(void) +{ + if (size_to_hstate(CONT_PTES * PAGE_SIZE) == NULL) + hugetlb_add_hstate(CONT_PTE_SHIFT); + return 0; +} +arch_initcall(add_default_hugepagesz); +#endif