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Thu, 25 Jun 2020 13:24:17 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id d3rrrGlAqAsv for ; Thu, 25 Jun 2020 13:24:16 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by whitealder.osuosl.org (Postfix) with ESMTPS id 897FF86E55 for ; Thu, 25 Jun 2020 13:24:16 +0000 (UTC) IronPort-SDR: c3AjkLb7nWLg6jL1asPCUbIfNEqvvRwFkEmOpGP4mlf5YERHsC6XkhndUdiwRLe3qtSTl1VcsS dcnWfKyrXefg== X-IronPort-AV: E=McAfee;i="6000,8403,9662"; a="146379185" X-IronPort-AV: E=Sophos;i="5.75,279,1589266800"; d="scan'208";a="146379185" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jun 2020 06:24:09 -0700 IronPort-SDR: 2ezmgb/2u+6MiN49NBDP4+M+S621ypojUrDTBgV5HkQXZoiMnzdBYl7br8dvfIWQ31G+v5RuoY 22igJXxP/XdQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,279,1589266800"; d="scan'208";a="263919837" Received: from blu2-mobl3.ccr.corp.intel.com (HELO [10.255.28.52]) ([10.255.28.52]) by fmsmga007.fm.intel.com with ESMTP; 25 Jun 2020 06:24:01 -0700 Subject: Re: [PATCH 02/13] iommu/vt-d: Use dev_iommu_priv_get/set() To: Joerg Roedel , iommu@lists.linux-foundation.org References: <20200625130836.1916-1-joro@8bytes.org> <20200625130836.1916-3-joro@8bytes.org> From: Lu Baolu Message-ID: <1f6c3feb-d8b0-3ade-db2e-133f40874c30@linux.intel.com> Date: Thu, 25 Jun 2020 21:24:00 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <20200625130836.1916-3-joro@8bytes.org> Content-Language: en-US Cc: linux-ia64@vger.kernel.org, Heiko Stuebner , David Airlie , Benjamin Herrenschmidt , Joonas Lahtinen , Thierry Reding , Paul Mackerras , Will Deacon , Michael Ellerman , x86@kernel.org, Russell King , Catalin Marinas , Fenghua Yu , Joerg Roedel , intel-gfx@lists.freedesktop.org, Jani Nikula , Rodrigo Vivi , Matthias Brugger , linux-arm-kernel@lists.infradead.org, Tony Luck , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Daniel Vetter , David Woodhouse X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi Joerg, On 2020/6/25 21:08, Joerg Roedel wrote: > From: Joerg Roedel > > Remove the use of dev->archdata.iommu and use the private per-device > pointer provided by IOMMU core code instead. > > Signed-off-by: Joerg Roedel > --- > .../gpu/drm/i915/selftests/mock_gem_device.c | 10 ++++++++-- > drivers/iommu/intel/iommu.c | 18 +++++++++--------- For changes in VT-d driver, Reviewed-by: Lu Baolu Best regards, baolu > 2 files changed, 17 insertions(+), 11 deletions(-) > > diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c > index 9b105b811f1f..e08601905a64 100644 > --- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c > +++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c > @@ -24,6 +24,7 @@ > > #include > #include > +#include > > #include > > @@ -118,6 +119,9 @@ struct drm_i915_private *mock_gem_device(void) > { > struct drm_i915_private *i915; > struct pci_dev *pdev; > +#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU) > + struct dev_iommu iommu; > +#endif > int err; > > pdev = kzalloc(sizeof(*pdev), GFP_KERNEL); > @@ -136,8 +140,10 @@ struct drm_i915_private *mock_gem_device(void) > dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); > > #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU) > - /* hack to disable iommu for the fake device; force identity mapping */ > - pdev->dev.archdata.iommu = (void *)-1; > + /* HACK HACK HACK to disable iommu for the fake device; force identity mapping */ > + memset(&iommu, 0, sizeof(iommu)); > + iommu.priv = (void *)-1; > + pdev->dev.iommu = &iommu; > #endif > > pci_set_drvdata(pdev, i915); > diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c > index d759e7234e98..2ce490c2eab8 100644 > --- a/drivers/iommu/intel/iommu.c > +++ b/drivers/iommu/intel/iommu.c > @@ -372,7 +372,7 @@ struct device_domain_info *get_domain_info(struct device *dev) > if (!dev) > return NULL; > > - info = dev->archdata.iommu; > + info = dev_iommu_priv_get(dev); > if (unlikely(info == DUMMY_DEVICE_DOMAIN_INFO || > info == DEFER_DEVICE_DOMAIN_INFO)) > return NULL; > @@ -743,12 +743,12 @@ struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus, > > static int iommu_dummy(struct device *dev) > { > - return dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; > + return dev_iommu_priv_get(dev) == DUMMY_DEVICE_DOMAIN_INFO; > } > > static bool attach_deferred(struct device *dev) > { > - return dev->archdata.iommu == DEFER_DEVICE_DOMAIN_INFO; > + return dev_iommu_priv_get(dev) == DEFER_DEVICE_DOMAIN_INFO; > } > > /** > @@ -2420,7 +2420,7 @@ static inline void unlink_domain_info(struct device_domain_info *info) > list_del(&info->link); > list_del(&info->global); > if (info->dev) > - info->dev->archdata.iommu = NULL; > + dev_iommu_priv_set(info->dev, NULL); > } > > static void domain_remove_dev_info(struct dmar_domain *domain) > @@ -2453,7 +2453,7 @@ static void do_deferred_attach(struct device *dev) > { > struct iommu_domain *domain; > > - dev->archdata.iommu = NULL; > + dev_iommu_priv_set(dev, NULL); > domain = iommu_get_domain_for_dev(dev); > if (domain) > intel_iommu_attach_device(domain, dev); > @@ -2599,7 +2599,7 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu, > list_add(&info->link, &domain->devices); > list_add(&info->global, &device_domain_list); > if (dev) > - dev->archdata.iommu = info; > + dev_iommu_priv_set(dev, info); > spin_unlock_irqrestore(&device_domain_lock, flags); > > /* PASID table is mandatory for a PCI device in scalable mode. */ > @@ -4004,7 +4004,7 @@ static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev) > if (!drhd || drhd->reg_base_addr - vtbar != 0xa000) { > pr_warn_once(FW_BUG "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n"); > add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); > - pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; > + dev_iommu_priv_set(&pdev->dev, DUMMY_DEVICE_DOMAIN_INFO); > } > } > DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu); > @@ -4043,7 +4043,7 @@ static void __init init_no_remapping_devices(void) > drhd->ignored = 1; > for_each_active_dev_scope(drhd->devices, > drhd->devices_cnt, i, dev) > - dev->archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; > + dev_iommu_priv_set(dev, DUMMY_DEVICE_DOMAIN_INFO); > } > } > } > @@ -5665,7 +5665,7 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev) > return ERR_PTR(-ENODEV); > > if (translation_pre_enabled(iommu)) > - dev->archdata.iommu = DEFER_DEVICE_DOMAIN_INFO; > + dev_iommu_priv_set(dev, DEFER_DEVICE_DOMAIN_INFO); > > return &iommu->iommu; > } > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu