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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-24 13:10:38 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-24 13:10:38 -0700 |
commit | 18b8bfdfbae5821a7df691bc1e542bbab6c31e9c (patch) | |
tree | 4c7c1d942c71b19fc6430e4acbe5b2f5967ab93d /arch/x86 | |
parent | d972604f6f87478212f012af5560c4fd4bb2b01d (diff) | |
parent | 6488a7f35eeab463f6c9c2ea34d30ca856f0bc8e (diff) | |
download | linux-18b8bfdfbae5821a7df691bc1e542bbab6c31e9c.tar.bz2 |
Merge tag 'iommu-updates-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
- PASID table handling updates for the Intel VT-d driver. It implements
a global PASID space now so that applications usings multiple devices
will just have one PASID.
- A new config option to make iommu passthroug mode the default.
- New sysfs attribute for iommu groups to export the type of the
default domain.
- A debugfs interface (for debug only) usable by IOMMU drivers to
export internals to user-space.
- R-Car Gen3 SoCs support for the ipmmu-vmsa driver
- The ARM-SMMU now aborts transactions from unknown devices and devices
not attached to any domain.
- Various cleanups and smaller fixes all over the place.
* tag 'iommu-updates-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (42 commits)
iommu/omap: Fix cache flushes on L2 table entries
iommu: Remove the ->map_sg indirection
iommu/arm-smmu-v3: Abort all transactions if SMMU is enabled in kdump kernel
iommu/arm-smmu-v3: Prevent any devices access to memory without registration
iommu/ipmmu-vmsa: Don't register as BUS IOMMU if machine doesn't have IPMMU-VMSA
iommu/ipmmu-vmsa: Clarify supported platforms
iommu/ipmmu-vmsa: Fix allocation in atomic context
iommu: Add config option to set passthrough as default
iommu: Add sysfs attribyte for domain type
iommu/arm-smmu-v3: sync the OVACKFLG to PRIQ consumer register
iommu/arm-smmu: Error out only if not enough context interrupts
iommu/io-pgtable-arm-v7s: Abort allocation when table address overflows the PTE
iommu/io-pgtable-arm: Fix pgtable allocation in selftest
iommu/vt-d: Remove the obsolete per iommu pasid tables
iommu/vt-d: Apply per pci device pasid table in SVA
iommu/vt-d: Allocate and free pasid table
iommu/vt-d: Per PCI device pasid table interfaces
iommu/vt-d: Add for_each_device_domain() helper
iommu/vt-d: Move device_domain_info to header
iommu/vt-d: Apply global PASID in SVA
...
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/include/asm/irq_remapping.h | 5 | ||||
-rw-r--r-- | arch/x86/kernel/pci-dma.c | 8 |
2 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h index 023b4a9fc846..5f26962eff42 100644 --- a/arch/x86/include/asm/irq_remapping.h +++ b/arch/x86/include/asm/irq_remapping.h @@ -33,6 +33,11 @@ enum irq_remap_cap { IRQ_POSTING_CAP = 0, }; +enum { + IRQ_REMAP_XAPIC_MODE, + IRQ_REMAP_X2APIC_MODE, +}; + struct vcpu_data { u64 pi_desc_addr; /* Physical address of PI Descriptor */ u32 vector; /* Guest vector of the interrupt */ diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index acfd04121da3..7ba73fe0d917 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -40,8 +40,14 @@ int iommu_detected __read_mostly = 0; * devices and allow every device to access to whole physical memory. This is * useful if a user wants to use an IOMMU only for KVM device assignment to * guests and not for driver dma translation. + * It is also possible to disable by default in kernel config, and enable with + * iommu=nopt at boot time. */ +#ifdef CONFIG_IOMMU_DEFAULT_PASSTHROUGH +int iommu_pass_through __read_mostly = 1; +#else int iommu_pass_through __read_mostly; +#endif extern struct iommu_table_entry __iommu_table[], __iommu_table_end[]; @@ -135,6 +141,8 @@ static __init int iommu_setup(char *p) #endif if (!strncmp(p, "pt", 2)) iommu_pass_through = 1; + if (!strncmp(p, "nopt", 4)) + iommu_pass_through = 0; gart_parse_options(p); |