From patchwork Mon Jul 26 06:37:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12398563 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD43EC4338F for ; Mon, 26 Jul 2021 06:49:47 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7FBBB60F45 for ; Mon, 26 Jul 2021 06:49:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 7FBBB60F45 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id: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=z95dbD0IVLefv8izmxOK+AVwDNUecAzM1dVEEAXDGh0=; b=sX50R7B/McrpHD QX1k0ZRLSS7lfKX52DKzl8CiX+pYVkOnXcuklq/HfUsDZ7e0Enc1NcEYdhph1zC+f7o52MTjtoOtm 7prFs9LDm9ugzXwJt7rSbSfdE8TUVUDEuZDQS9ruNrk4vX6JdlwfydWFKa/bsYghtLmpRxeFir91r wogmU9En9GaOy17eI54SWk9ms4rgNqT0IhVm1c4bvIIekv6VbydvYfh2tveihJez/hmoBYNEYB2nv AFcQB4/DQDX6c8o1zCjxXKjxzcM2GIQfwVK/tRRip6DiecILs9g1hrbS0biNdrx9VvnLkHhfi/k6N FKeYWIDKT353GTmsuHIQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m7uGa-009jCv-8T; Mon, 26 Jul 2021 06:39:08 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m7uF6-009igw-92 for linux-arm-kernel@lists.infradead.org; Mon, 26 Jul 2021 06:37:37 +0000 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 C07FC139F; Sun, 25 Jul 2021 23:37:35 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.66.17]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C988D3F66F; Sun, 25 Jul 2021 23:37:31 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: akpm@linux-foundation.org, suzuki.poulose@arm.com, mark.rutland@arm.com, will@kernel.org, catalin.marinas@arm.com, maz@kernel.org, james.morse@arm.com, steven.price@arm.com, Anshuman Khandual Subject: [RFC V2 10/10] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES Date: Mon, 26 Jul 2021 12:07:25 +0530 Message-Id: <1627281445-12445-11-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1627281445-12445-1-git-send-email-anshuman.khandual@arm.com> References: <1627281445-12445-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210725_233736_459396_D0D6DDBD X-CRM114-Status: GOOD ( 10.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org All required FEAT_LPA2 components for 52 bit PA range are already in place. Just enable CONFIG_ARM64_PA_BITS_52 on 4K and 16K pages which would select CONFIG_ARM64_PA_BITS_52_LPA2 activating 52 bit PA range via FEAT_LPA2. Signed-off-by: Anshuman Khandual --- arch/arm64/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1999ac6..ce139415 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -952,9 +952,9 @@ config ARM64_PA_BITS_48 config ARM64_PA_BITS_52 bool "52-bit (ARMv8.2)" - depends on ARM64_64K_PAGES depends on ARM64_PAN || !ARM64_SW_TTBR0_PAN select ARM64_PA_BITS_52_LPA if ARM64_64K_PAGES + select ARM64_PA_BITS_52_LPA2 if (ARM64_4K_PAGES || ARM64_16K_PAGES) help Enable support for a 52-bit physical address space, introduced as part of the ARMv8.2-LPA extension.