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Wysocki" , Len Brown , jean-philippe , Greg Kroah-Hartman , Herbert Xu , kenneth-lee-2012@foxmail.com, Wangzhou Subject: [PATCH 1/2] PCI: Introduce PCI_FIXUP_IOMMU Date: Tue, 26 May 2020 19:49:08 +0800 Message-Id: <1590493749-13823-2-git-send-email-zhangfei.gao@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1590493749-13823-1-git-send-email-zhangfei.gao@linaro.org> References: <1590493749-13823-1-git-send-email-zhangfei.gao@linaro.org> Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, linux-crypto@vger.kernel.org, Zhangfei Gao , linux-arm-kernel@lists.infradead.org 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: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Some platform devices appear as PCI but are actually on the AMBA bus, and they need fixup in drivers/pci/quirks.c handling iommu_fwnode. Here introducing PCI_FIXUP_IOMMU, which is called after iommu_fwnode is allocated, instead of reusing PCI_FIXUP_FINAL since it will slow down iommu probing as all devices in fixup final list will be reprocessed. Suggested-by: Joerg Roedel Signed-off-by: Zhangfei Gao --- drivers/pci/quirks.c | 7 +++++++ include/asm-generic/vmlinux.lds.h | 3 +++ include/linux/pci.h | 8 ++++++++ 3 files changed, 18 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index ca9ed57..b037034 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -83,6 +83,8 @@ extern struct pci_fixup __start_pci_fixups_header[]; extern struct pci_fixup __end_pci_fixups_header[]; extern struct pci_fixup __start_pci_fixups_final[]; extern struct pci_fixup __end_pci_fixups_final[]; +extern struct pci_fixup __start_pci_fixups_iommu[]; +extern struct pci_fixup __end_pci_fixups_iommu[]; extern struct pci_fixup __start_pci_fixups_enable[]; extern struct pci_fixup __end_pci_fixups_enable[]; extern struct pci_fixup __start_pci_fixups_resume[]; @@ -118,6 +120,11 @@ void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev) end = __end_pci_fixups_final; break; + case pci_fixup_iommu: + start = __start_pci_fixups_iommu; + end = __end_pci_fixups_iommu; + break; + case pci_fixup_enable: start = __start_pci_fixups_enable; end = __end_pci_fixups_enable; diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 71e387a..3da32d8 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -411,6 +411,9 @@ __start_pci_fixups_final = .; \ KEEP(*(.pci_fixup_final)) \ __end_pci_fixups_final = .; \ + __start_pci_fixups_iommu = .; \ + KEEP(*(.pci_fixup_iommu)) \ + __end_pci_fixups_iommu = .; \ __start_pci_fixups_enable = .; \ KEEP(*(.pci_fixup_enable)) \ __end_pci_fixups_enable = .; \ diff --git a/include/linux/pci.h b/include/linux/pci.h index 83ce1cd..0d5fbf8 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1892,6 +1892,7 @@ enum pci_fixup_pass { pci_fixup_early, /* Before probing BARs */ pci_fixup_header, /* After reading configuration header */ pci_fixup_final, /* Final phase of device fixups */ + pci_fixup_iommu, /* After iommu_fwspec_init */ pci_fixup_enable, /* pci_enable_device() time */ pci_fixup_resume, /* pci_device_resume() */ pci_fixup_suspend, /* pci_device_suspend() */ @@ -1934,6 +1935,10 @@ enum pci_fixup_pass { class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ hook, vendor, device, class, class_shift, hook) +#define DECLARE_PCI_FIXUP_CLASS_IOMMU(vendor, device, class, \ + class_shift, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_iommu, \ + hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ @@ -1964,6 +1969,9 @@ enum pci_fixup_pass { #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ hook, vendor, device, PCI_ANY_ID, 0, hook) +#define DECLARE_PCI_FIXUP_IOMMU(vendor, device, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_iommu, \ + hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ hook, vendor, device, PCI_ANY_ID, 0, hook) -- 2.7.4 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu