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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 A3EEFCD6E57 for ; Wed, 3 Jun 2026 01:13:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C421610F73C; Wed, 3 Jun 2026 01:13:33 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; secure) header.d=ziepe.ca header.i=@ziepe.ca header.b="TPYsWr33"; dkim-atps=neutral Received: from mail-qt1-f182.google.com (mail-qt1-f182.google.com [209.85.160.182]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2B3EB10F73C for ; Wed, 3 Jun 2026 01:13:33 +0000 (UTC) Received: by mail-qt1-f182.google.com with SMTP id d75a77b69052e-5176fc0cc72so11481511cf.1 for ; Tue, 02 Jun 2026 18:13:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1780449212; x=1781054012; darn=lists.freedesktop.org; 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=2cdnAPJ/txGMdC+542Rqoyln86KAovKwsF9QsCq4AEY=; b=TPYsWr332VbteTPNqRnGT4SvX8XV6WHJkECwsmePfx/n5OZ9hyCHjIwDkO5xm7cFzk kBCnGKW/uzAiodBTm7efoq8PHHAGzOfs0Qm9+jW+dL0hz3R7EtiQuTeGjNec2xDRFe03 0fhJ/u5tAQ5QMkLVxMvQsItWReraAs2m1uvoMK3QO8JhqYQohvHJ1qkGKosB/wLTltSq zDlprBB/XYtKYyThHiU0vUP0O5wtEBHjJ2ri/vwXIyx1KetSRtOPOsIqwCltBSLk8oWr 9DLfF7PIPP2aSn0W387zeGU2kFq++Y34p7UViJjO3esvMuAghg65xL5YYZ31bQRo3pwz VhmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780449212; x=1781054012; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2cdnAPJ/txGMdC+542Rqoyln86KAovKwsF9QsCq4AEY=; b=VYhbiEsInuWfOxhgbdQEfPy8vyZzpJhDsnbEgKwHavh/XMyGXjrQNtmtLQwyJLTXyS 3vtiRFLMFNFrbJTuqlPWUgC8TlvNvvJzSMn/9tAOvNb7ihC1RwwytgjPzRmWol+KgITl 33kn60yXU80Fiu9J6GUDRSFRBACRACOjPDl4PA3feoVbY6h3CBn15LebTa+vcPfdO3jb O/F/6dEuoRm4cIZU2JQT5vgB6fvP2CYUjYhrnpNVvMX7z7drvZATDAmJcG/ePbLfyygi 0mC6gZClcnGl7fi5vkA6XEhGGDY8Xmfk6Np5GmPUVuZ27dHWbs9aiGSz43AW5CcLolRX 6opA== X-Forwarded-Encrypted: i=1; AFNElJ8ci9LEekOZXvapSALqfMfL9FnLIkLn1FqqpJ9OLf+RX2tIQCmr8fFR7asU/8lfsBRYtD4b4J6GYkY=@lists.freedesktop.org X-Gm-Message-State: AOJu0Ywsxfwlu7TCmXAHAAhwUusxyY69K4E5JA4acqvzOQPZyFisqT3L RW3vuy9EhQyD+IN46gsHhyNgqActzhw98LX1U7s78OrELOAGF6M2ti1iwDcMHO7N6rU= X-Gm-Gg: Acq92OEDXAkBqapW46KsTIUDwepGWd2nPzIXC+lmBYVH8iIhJjTwLG238o6nKvQ6lHd fw/LFuYmMLzY4eupyD8ePcWI3O+qzVyY6/jmhMdtjFoauDd7g+W1BHzAmHwbQF0VrEh5Azr71GM lAxHbseyBe0018LnUZFpBIMf2KoJIrG/6AKeuPqolSn7g5zMFj8KwKJkvbkRdW/imEey2uqI5rQ pNz23Eq7Am9RurEAeM68X2WFx7Eqz8l7OVxsjJfMva2UjO1muBWcBp5uBOAcDmeUOdxDJpi9E6Z /QgkCmWbAIhBKudOQjUY03E6+9oEYzxmF+UqyWPx0twNgs1/NFzCJa0ztlLF7MMaoC6IiYUSZaV IM6O0P6q9Dl8q2VictgGOcQUjhaNKd8AHFMBR1IWyMPPvZCQ0XZP7zhJ7ouOGc3MhNG1flCe74r xRvbfaoZ3DekdEADtB8Y+CztJSje8oon/3X3q/BI+/G7/aGspYAZkFWKxr07GS38oanalZvY+6Z crd5GVPBMIaSVI7 X-Received: by 2002:a05:622a:5b90:b0:517:7590:228e with SMTP id d75a77b69052e-517784827b9mr21839501cf.0.1780449212162; Tue, 02 Jun 2026 18:13:32 -0700 (PDT) Received: from ziepe.ca (crbknf0213w-47-54-130-67.pppoe-dynamic.high-speed.nl.bellaliant.net. [47.54.130.67]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-51775c54177sm13497781cf.12.2026.06.02.18.13.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jun 2026 18:13:31 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1wUaAk-00000004yZP-2Ic0; Tue, 02 Jun 2026 22:13:30 -0300 Date: Tue, 2 Jun 2026 22:13:30 -0300 From: Jason Gunthorpe To: Guanghui Feng Cc: adrian.larumbe@collabora.com, airlied@gmail.com, alex@shazbot.org, baolu.lu@linux.intel.com, boris.brezillon@collabora.com, dri-devel@lists.freedesktop.org, dwmw2@infradead.org, iommu@lists.linux.dev, joro@8bytes.org, kevin.tian@intel.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, liviu.dudau@arm.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, oliver.yang@linux.alibaba.com, robh@kernel.org, robin.murphy@arm.com, shiyu.zsq@linux.alibaba.com, steven.price@arm.com, suravee.suthikulpanit@amd.com, tzimmermann@suse.de, wei.guo.simon@linux.alibaba.com, will@kernel.org, xlpang@linux.alibaba.com, alikernel-developer@linux.alibaba.com Subject: Re: [PATCH v2 10/30] iommu/ipmmu-vmsa: implement iova_to_phys_length Message-ID: <20260603011330.GS2487554@ziepe.ca> References: <20260531093637.3893199-1-guanghuifeng@linux.alibaba.com> <20260602104637.1219810-1-guanghuifeng@linux.alibaba.com> <20260602104637.1219810-11-guanghuifeng@linux.alibaba.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260602104637.1219810-11-guanghuifeng@linux.alibaba.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Tue, Jun 02, 2026 at 06:46:17PM +0800, Guanghui Feng wrote: > Migrate IPMMU-VMSA to implement iova_to_phys_length, passing through > mapped_length from io-pgtable. > > Signed-off-by: Guanghui Feng > --- > drivers/iommu/ipmmu-vmsa.c | 12 ++++++++---- > 1 file changed, 8 insertions(+), 4 deletions(-) > > diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c > index 9386b752dea2..a1b659ddbdb5 100644 > --- a/drivers/iommu/ipmmu-vmsa.c > +++ b/drivers/iommu/ipmmu-vmsa.c > @@ -699,14 +699,18 @@ static void ipmmu_iotlb_sync(struct iommu_domain *io_domain, > ipmmu_flush_iotlb_all(io_domain); > } > > -static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain, > - dma_addr_t iova) > +static phys_addr_t ipmmu_iova_to_phys_length(struct iommu_domain *io_domain, > + dma_addr_t iova, size_t *mapped_length) > { > struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain); > > + if (mapped_length) > + *mapped_length = 0; Why? Jason