From mboxrd@z Thu Jan 1 00:00:00 1970 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 9B7A1D2F000 for ; Tue, 27 Jan 2026 11:31:53 +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:Subject:CC:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Tp1suiWH8/OzZCmXS9VgFljfMOquW6cZRegEMWCg3GU=; b=CGNkC1YIugNHeeP387FaNc/OxL yFFiHyk93+WCA0zy1rZxiEW8/60j937o8zK5naONGEQ6YY1oFuR293DiWjJzrt7BSyfwYwWdvwdOb Cj0Rlct58Ckn8UCaluSV+hogapOP8JP9r1JnZiYtPutAFg9ducmJilH0o/SJkEVAaeYoyvfRYSGbh EMmjhAbiwXZVBG+x2XKsk+L8jtibXJ6e0mEl1u1dhWv9ransfFHyL6WBAh6OcBc+spTiw7WmrHqzT q/g1fFspw3yHhWWTJRMmBihRrs0k0eAwVLpNXQBnHiSbZIX0aBBUGjNRbe/AWR/GnlRM8hkCz36U0 SCHVYc+g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vkhIP-0000000EA0b-3TRY; Tue, 27 Jan 2026 11:31:45 +0000 Received: from sinmsgout02.his.huawei.com ([119.8.177.37]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vkhIM-0000000E9yR-0xUK for linux-arm-kernel@lists.infradead.org; Tue, 27 Jan 2026 11:31:43 +0000 dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=Tp1suiWH8/OzZCmXS9VgFljfMOquW6cZRegEMWCg3GU=; b=ZMM/gisSEkV1luBZufBUNu4mr08k5fBtjWP/tqZt2U7XUEXahwMDszc6Y3renUNhet1H1kaLD /ONkSKOcRtDFmQ/jzA8/0Gg+DCG1dWAmGV3tM4sVCQgDxrt3PyfFMUb0ew2wtZQtFSuHS+/M2+m XC5sqYjdAllG9D7Yz/0hPzk= Received: from frasgout.his.huawei.com (unknown [172.18.146.32]) by sinmsgout02.his.huawei.com (SkyGuard) with ESMTPS id 4f0jpl6C9bz1vnJg; Tue, 27 Jan 2026 19:29:03 +0800 (CST) Received: from mail.maildlp.com (unknown [172.18.224.150]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4f0jrk5hjKzHnHH8; Tue, 27 Jan 2026 19:30:46 +0800 (CST) Received: from dubpeml500005.china.huawei.com (unknown [7.214.145.207]) by mail.maildlp.com (Postfix) with ESMTPS id 40D6B40539; Tue, 27 Jan 2026 19:31:32 +0800 (CST) Received: from localhost (10.203.177.15) by dubpeml500005.china.huawei.com (7.214.145.207) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 27 Jan 2026 11:31:31 +0000 Date: Tue, 27 Jan 2026 11:31:30 +0000 From: Jonathan Cameron To: Ryan Roberts CC: Will Deacon , Ard Biesheuvel , Catalin Marinas , Mark Rutland , Linus Torvalds , Oliver Upton , Marc Zyngier , "Dev Jain" , Linu Cherian , , Subject: Re: [PATCH v2 03/13] arm64: mm: Implicitly invalidate user ASID based on TLBI operation Message-ID: <20260127113130.00005395@huawei.com> In-Reply-To: <20260119172202.1681510-4-ryan.roberts@arm.com> References: <20260119172202.1681510-1-ryan.roberts@arm.com> <20260119172202.1681510-4-ryan.roberts@arm.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.203.177.15] X-ClientProxiedBy: lhrpeml500010.china.huawei.com (7.191.174.240) To dubpeml500005.china.huawei.com (7.214.145.207) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260127_033142_540081_8B3E98CC X-CRM114-Status: UNSURE ( 8.98 ) 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 On Mon, 19 Jan 2026 17:21:50 +0000 Ryan Roberts wrote: > When kpti is enabled, separate ASIDs are used for userspace and > kernelspace, requiring ASID-qualified TLB invalidation by virtual > address to invalidate both of them. > > Push the logic for invalidating the two ASIDs down into the low-level > tlbi-op-specific functions and remove the burden from the caller to > handle the kpti-specific behaviour. > > Co-developed-by: Will Deacon > Signed-off-by: Will Deacon > Signed-off-by: Ryan Roberts Reviewed-by: Jonathan Cameron