From patchwork Wed Feb 19 14:38:40 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Miko=C5=82aj_Lenczewski?= X-Patchwork-Id: 13982482 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 928C6C021AA for ; Wed, 19 Feb 2025 15:56:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type: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=S1cyu4qLCW+G5IS8eMs/nlDOlaE0XI3DusDqdVY92os=; b=I6A6NWMbVyT9EoIX0jVNP61DEA waN6bRdBbvD7R/nObdpGEDu9oxEcyqHq3CB2aQznHh411P2xc9MZlsG+1pWombBQ7lvXXJOT8KaCl Y6ERxd87LHHR8oKY72A6D/ZWH3pAodYn281L6avPbsdho68F3ZRygWmLAU4Wz4KhbI1SOD+0utnrI nPZz6KuywyrqjsaYOH3M4bleYVSQFORdY4o/rlMneul7nm8bLyrBUHotngBy9U8t16gNwWX4qfmhN Ere44pa5RcY55bXvG8xHqRoxYxhDRqFebWIqoGbxH92sYyDzT+PtDml14+g6vDzdc8aZf4DiQWgaz /9Lb7SQA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tkmQm-0000000DfOA-1yKJ; Wed, 19 Feb 2025 15:56:12 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tklLG-0000000DMK7-2dvI for linux-arm-kernel@bombadil.infradead.org; Wed, 19 Feb 2025 14:46:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:Content-Type :MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Sender:Reply-To:Content-ID:Content-Description; bh=S1cyu4qLCW+G5IS8eMs/nlDOlaE0XI3DusDqdVY92os=; b=SN2aC96RoBTOAg49+w+VQLrQ09 Op+F6msNc556ma0Vn+lpnkeYOzT81vBXuEAW4sNj5gg4AcjTxyzqzDWHxN7scEES8tywuO7a+OmcV 8jDpaGJ8G5Yorjc7QvuM6D8514j6cqGf+mEBz8Fn/I5S2R7+zmlp944G+bRGE3TXgDuGFjiuKkXhB k/Otn9uDAjRe5NtjslsGNPDIyrfInRDN+H+MauCU+375bYCdKQu3XOSJPMJRrdURAHt2uyZv2zLN4 A+n3vhukAgSLj7OqWYMQJKeISdlEDffSypWau0i8Adu68yKz+cxgeigASQipiZn6zPsVL6+eiAtHW t8JFdoIQ==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tklLD-00000002CpS-3LfK for linux-arm-kernel@lists.infradead.org; Wed, 19 Feb 2025 14:46:25 +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 9499C202C; Wed, 19 Feb 2025 06:46:41 -0800 (PST) Received: from mazurka.cambridge.arm.com (mazurka.cambridge.arm.com [10.2.80.18]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 40E293F59E; Wed, 19 Feb 2025 06:46:20 -0800 (PST) From: =?utf-8?q?Miko=C5=82aj_Lenczewski?= To: ryan.roberts@arm.com, yang@os.amperecomputing.com, catalin.marinas@arm.com, will@kernel.org, joey.gouly@arm.com, broonie@kernel.org, mark.rutland@arm.com, james.morse@arm.com, yangyicong@hisilicon.com, robin.murphy@arm.com, anshuman.khandual@arm.com, maz@kernel.org, liaochang1@huawei.com, akpm@linux-foundation.org, david@redhat.com, baohua@kernel.org, ioworker0@gmail.com, oliver.upton@linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: =?utf-8?q?Miko=C5=82aj_Lenczewski?= Subject: [PATCH v1 3/3] arm64/mm: Elide tlbi in contpte_convert() under BBML2 Date: Wed, 19 Feb 2025 14:38:40 +0000 Message-ID: <20250219143837.44277-7-miko.lenczewski@arm.com> X-Mailer: git-send-email 2.45.3 In-Reply-To: <20250219143837.44277-3-miko.lenczewski@arm.com> References: <20250219143837.44277-3-miko.lenczewski@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250219_144624_026805_56A716AE X-CRM114-Status: UNSURE ( 7.95 ) X-CRM114-Notice: Please train this message. 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org If we support bbml2 without conflict aborts, we can avoid the final flush and have hardware manage the tlb entries for us. Avoiding flushes is a win. Signed-off-by: MikoĊ‚aj Lenczewski Reviewed-by: Ryan Roberts --- arch/arm64/mm/contpte.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm64/mm/contpte.c b/arch/arm64/mm/contpte.c index e26e8f8cfb9b..26a86248f897 100644 --- a/arch/arm64/mm/contpte.c +++ b/arch/arm64/mm/contpte.c @@ -72,9 +72,6 @@ static void contpte_convert(struct mm_struct *mm, unsigned long addr, __flush_tlb_range(&vma, start_addr, addr, PAGE_SIZE, true, 3); __set_ptes(mm, start_addr, start_ptep, pte, CONT_PTES); - - if (system_supports_bbml2_noconflict()) - __flush_tlb_range(&vma, start_addr, addr, PAGE_SIZE, true, 3); } void __contpte_try_fold(struct mm_struct *mm, unsigned long addr,