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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA309C41513 for ; Fri, 21 Jul 2023 19:25:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232274AbjGUTZz (ORCPT ); Fri, 21 Jul 2023 15:25:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46888 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232251AbjGUTZw (ORCPT ); Fri, 21 Jul 2023 15:25:52 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1441AE75 for ; Fri, 21 Jul 2023 12:25:51 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id 98e67ed59e1d1-262ff3a4659so1325072a91.0 for ; Fri, 21 Jul 2023 12:25:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1689967550; x=1690572350; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=MMsZNxLO6ied/G62NsNmuJtbpPqA/ZDXuniKdHv3YB4=; b=XQzjypm8qf/fouvehrBkEZjx7rraTNYkUvdCKXn1r1gfZnRnhcrrwzmNXN35Uu7gzI 8oZahINtXmo9uCfjOT5mfF9tPFqadYED4ml2Rvg4gr4OGGmk2vfi6ALPhCVFDbYVbCVR bizj8weYssavNq2IYvHIenQVmt+p9+kOYvZhgrRMHxTk+VUEpNpnyoTxavBUyIHeBvaf qo1QRc6+YoA80RoGKZsLsD7vsvUGziFJq2u5Wn3UEGI6GwRgyCcJvjby4g2TfS0YmrN7 IaJoLwJh5sfemxuaaNtQypWoArXN7KcGOCwTG4BZdi4RfD5EEjDf6oZVJxfS3TMV68DT 4znQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689967550; x=1690572350; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=MMsZNxLO6ied/G62NsNmuJtbpPqA/ZDXuniKdHv3YB4=; b=gxh8Rdar4KwN8RRIgmJgKoSBzg+Fy4Nnw7RyN/AKr2mewRCW5Mr8TyWI0zbET2kn1y gEhDHKe+zX3qX5ZzPDabysNi94PJx/S/7Le9W1Nq1p33neXRrfKkullQ2KicWUJvmhyN 5F3Z4GFb72NNl/djyAamcMht6zTONie75c3Bg1DXjlKAjWMwnEJY4aEsnuiukyAc086l V2mdxfn57FZHcicfycewDGO/Eum/f046wUXiamHPRvNLqQXzv1G/Btyjo5gf8eneJovZ tWzlq05zMikpx7yNve2ma17WUJN+d+bpfHEglXK8f6ShjkydMeS15KYVZNwJrLyFFqqU qlzA== X-Gm-Message-State: ABy/qLZca+tSBvd2fd3RKjgyfjUOZvxb2IuZAkVFLmw1zdEPz9rIKSmh 8KSOaI99Og/1bXSVloyEC6PNtg== X-Google-Smtp-Source: APBJJlEp8s38SXROq49pagsC5pVvuYXs5UAkGBJHAYanGZ9PMcBXp3bCvAhBUtgXgds2MFlgz7aUow== X-Received: by 2002:a17:90b:2308:b0:262:f06d:c0fc with SMTP id mt8-20020a17090b230800b00262f06dc0fcmr2530695pjb.7.1689967550531; Fri, 21 Jul 2023 12:25:50 -0700 (PDT) Received: from ziepe.ca ([206.223.160.26]) by smtp.gmail.com with ESMTPSA id d5-20020a17090a8d8500b0025bd4db25f0sm2845416pjo.53.2023.07.21.12.25.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Jul 2023 12:25:49 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1qMvl5-003ID1-Uq; Fri, 21 Jul 2023 16:25:47 -0300 Date: Fri, 21 Jul 2023 16:25:47 -0300 From: Jason Gunthorpe To: Alistair Popple Cc: akpm@linux-foundation.org, ajd@linux.ibm.com, catalin.marinas@arm.com, fbarrat@linux.ibm.com, iommu@lists.linux.dev, jhubbard@nvidia.com, kevin.tian@intel.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, nicolinc@nvidia.com, npiggin@gmail.com, robin.murphy@arm.com, seanjc@google.com, will@kernel.org, x86@kernel.org, zhi.wang.linux@gmail.com, sj@kernel.org Subject: Re: [PATCH v3 1/5] arm64/smmu: Use TLBI ASID when invalidating entire range Message-ID: References: <082390057ec33969c81d49d35aa3024d7082b0bd.1689842332.git-series.apopple@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <082390057ec33969c81d49d35aa3024d7082b0bd.1689842332.git-series.apopple@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 20, 2023 at 06:39:23PM +1000, Alistair Popple wrote: > The ARM SMMU has a specific command for invalidating the TLB for an > entire ASID. Currently this is used for the IO_PGTABLE API but not for > ATS when called from the MMU notifier. > > The current implementation of notifiers does not attempt to invalidate > such a large address range, instead walking each VMA and invalidating > each range individually during mmap removal. However in future SMMU > TLB invalidations are going to be sent as part of the normal > flush_tlb_*() kernel calls. To better deal with that add handling to > use TLBI ASID when invalidating the entire address space. > > Signed-off-by: Alistair Popple > --- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 16 +++++++++++++--- > 1 file changed, 13 insertions(+), 3 deletions(-) Reviewed-by: Jason Gunthorpe Jason