mirror of https://gitee.com/openkylin/linux.git
x86/ia64: intel-iommu: move to drivers/iommu/
This should ease finding similarities with different platforms, with the intention of solving problems once in a generic framework which everyone can use. Note: to move intel-iommu.c, the declaration of pci_find_upstream_pcie_bridge() has to move from drivers/pci/pci.h to include/linux/pci.h. This is handled in this patch, too. As suggested, also drop DMAR's EXPERIMENTAL tag while we're at it. Compile-tested on x86_64. Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Ohad Ben-Cohen
Joerg Roedel
parent
29b68415e3
commit
166e9278a3
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@ -627,27 +627,6 @@ source "drivers/pci/hotplug/Kconfig"
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source "drivers/pcmcia/Kconfig"
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config DMAR
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bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
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depends on IA64_GENERIC && ACPI && EXPERIMENTAL
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help
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DMA remapping (DMAR) devices support enables independent address
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translations for Direct Memory Access (DMA) from devices.
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These DMA remapping devices are reported via ACPI tables
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and include PCI device scope covered by these DMA
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remapping devices.
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config DMAR_DEFAULT_ON
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def_bool y
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prompt "Enable DMA Remapping Devices by default"
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depends on DMAR
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help
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Selecting this option will enable a DMAR device at boot time if
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one is found. If this option is not selected, DMAR support can
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be enabled by passing intel_iommu=on to the kernel. It is
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recommended you say N here while the DMAR code remains
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experimental.
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endmenu
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endif
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@ -1912,56 +1912,6 @@ config PCI_CNB20LE_QUIRK
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You should say N unless you know you need this.
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config DMAR
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bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
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depends on PCI_MSI && ACPI && EXPERIMENTAL
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select IOMMU_API
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help
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DMA remapping (DMAR) devices support enables independent address
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translations for Direct Memory Access (DMA) from devices.
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These DMA remapping devices are reported via ACPI tables
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and include PCI device scope covered by these DMA
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remapping devices.
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config DMAR_DEFAULT_ON
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def_bool y
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prompt "Enable DMA Remapping Devices by default"
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depends on DMAR
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help
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Selecting this option will enable a DMAR device at boot time if
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one is found. If this option is not selected, DMAR support can
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be enabled by passing intel_iommu=on to the kernel. It is
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recommended you say N here while the DMAR code remains
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experimental.
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config DMAR_BROKEN_GFX_WA
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bool "Workaround broken graphics drivers (going away soon)"
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depends on DMAR && BROKEN
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---help---
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Current Graphics drivers tend to use physical address
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for DMA and avoid using DMA APIs. Setting this config
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option permits the IOMMU driver to set a unity map for
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all the OS-visible memory. Hence the driver can continue
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to use physical addresses for DMA, at least until this
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option is removed in the 2.6.32 kernel.
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config DMAR_FLOPPY_WA
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def_bool y
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depends on DMAR
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---help---
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Floppy disk drivers are known to bypass DMA API calls
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thereby failing to work when IOMMU is enabled. This
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workaround will setup a 1:1 mapping for the first
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16MiB to make floppy (an ISA device) work.
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config INTR_REMAP
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bool "Support for Interrupt Remapping (EXPERIMENTAL)"
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depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
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---help---
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Supports Interrupt remapping for IO-APIC and MSI devices.
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To use x2apic mode in the CPU's which support x2APIC enhancements or
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to support platforms with CPU's having > 8 bit APIC ID, say Y.
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source "drivers/pci/pcie/Kconfig"
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source "drivers/pci/Kconfig"
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@ -46,3 +46,52 @@ config AMD_IOMMU_STATS
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statistics about whats happening in the driver and exports that
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information to userspace via debugfs.
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If unsure, say N.
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# Intel IOMMU support
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config DMAR
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bool "Support for DMA Remapping Devices"
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depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
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select IOMMU_API
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help
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DMA remapping (DMAR) devices support enables independent address
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translations for Direct Memory Access (DMA) from devices.
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These DMA remapping devices are reported via ACPI tables
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and include PCI device scope covered by these DMA
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remapping devices.
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config DMAR_DEFAULT_ON
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def_bool y
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prompt "Enable DMA Remapping Devices by default"
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depends on DMAR
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help
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Selecting this option will enable a DMAR device at boot time if
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one is found. If this option is not selected, DMAR support can
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be enabled by passing intel_iommu=on to the kernel.
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config DMAR_BROKEN_GFX_WA
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bool "Workaround broken graphics drivers (going away soon)"
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depends on DMAR && BROKEN && X86
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---help---
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Current Graphics drivers tend to use physical address
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for DMA and avoid using DMA APIs. Setting this config
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option permits the IOMMU driver to set a unity map for
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all the OS-visible memory. Hence the driver can continue
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to use physical addresses for DMA, at least until this
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option is removed in the 2.6.32 kernel.
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config DMAR_FLOPPY_WA
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def_bool y
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depends on DMAR && X86
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---help---
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Floppy disk drivers are known to bypass DMA API calls
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thereby failing to work when IOMMU is enabled. This
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workaround will setup a 1:1 mapping for the first
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16MiB to make floppy (an ISA device) work.
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config INTR_REMAP
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bool "Support for Interrupt Remapping (EXPERIMENTAL)"
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depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
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---help---
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Supports Interrupt remapping for IO-APIC and MSI devices.
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To use x2apic mode in the CPU's which support x2APIC enhancements or
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to support platforms with CPU's having > 8 bit APIC ID, say Y.
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@ -1,3 +1,5 @@
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obj-$(CONFIG_IOMMU_API) += iommu.o
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obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
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obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o
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obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o
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obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o
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@ -42,7 +42,6 @@
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#include <linux/pci-ats.h>
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#include <asm/cacheflush.h>
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#include <asm/iommu.h>
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#include "pci.h"
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#define ROOT_SIZE VTD_PAGE_SIZE
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#define CONTEXT_SIZE VTD_PAGE_SIZE
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@ -13,7 +13,6 @@
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#include "intr_remapping.h"
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#include <acpi/acpi.h>
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#include <asm/pci-direct.h>
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#include "pci.h"
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static struct ioapic_scope ir_ioapic[MAX_IO_APICS];
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static struct hpet_scope ir_hpet[MAX_HPET_TBS];
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@ -29,11 +29,6 @@ obj-$(CONFIG_PCI_MSI) += msi.o
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# Build the Hypertransport interrupt support
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obj-$(CONFIG_HT_IRQ) += htirq.o
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# Build Intel IOMMU support
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obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o
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obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o
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obj-$(CONFIG_PCI_IOV) += iov.o
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#
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@ -184,8 +184,6 @@ pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
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return NULL;
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}
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struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
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/* PCI slot sysfs helper code */
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#define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
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@ -1589,5 +1589,16 @@ int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
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int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
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unsigned int len, const char *kw);
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/**
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* pci_find_upstream_pcie_bridge - find upstream PCIe-to-PCI bridge of a device
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* @pdev: the PCI device
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*
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* if the device is PCIE, return NULL
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* if the device isn't connected to a PCIe bridge (that is its parent is a
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* legacy PCI bridge and the bridge is directly connected to bus 0), return its
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* parent
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*/
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struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
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#endif /* __KERNEL__ */
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#endif /* LINUX_PCI_H */
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