Shaohua Li bfd20f1cc8 x86, iommu/vt-d: Add an option to disable Intel IOMMU force on ... IOMMU harms performance signficantly when we run very fast networking workloads. It's 40GB networking doing XDP test. Software overhead is almost unaware, but it's the IOTLB miss (based on our analysis) which kills the performance. We observed the same performance issue even with software passthrough (identity mapping), only the hardware passthrough survives. The pps with iommu (with software passthrough) is only about ~30% of that without it. This is a limitation in hardware based on our observation, so we'd like to disable the IOMMU force on, but we do want to use TBOOT and we can sacrifice the DMA security bought by IOMMU. I must admit I know nothing about TBOOT, but TBOOT guys (cc-ed) think not eabling IOMMU is totally ok. So introduce a new boot option to disable the force on. It's kind of silly we need to run into intel_iommu_init even without force on, but we need to disable TBOOT PMR registers. For system without the boot option, nothing is changed. Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>		2017-04-26 23:57:53 +02:00
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amd_iommu_init.c	iommu/amd: Fix crash when accessing AMD-Vi sysfs entries	2017-02-28 15:48:23 +01:00
amd_iommu_proto.h	Merge branch 'x86/amd-avic' into x86/amd	2016-09-05 12:43:16 +02:00
amd_iommu_types.h	iommu/amd: Fix crash when accessing AMD-Vi sysfs entries	2017-02-28 15:48:23 +01:00
amd_iommu_v2.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>	2017-03-02 08:42:28 +01:00
amd_iommu.c	This is a tree wide change and has been kept separate for that reason.	2017-02-25 13:45:43 -08:00
arm-smmu-v3.c	Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'arm/mediatek', 'arm/core', 'x86/vt-d' and 'core' into next	2017-02-10 15:13:10 +01:00
arm-smmu.c	Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'arm/mediatek', 'arm/core', 'x86/vt-d' and 'core' into next	2017-02-10 15:13:10 +01:00
dma-iommu.c	iommu/dma: Remove bogus dma_supported() implementation	2017-02-06 13:14:10 +01:00
dmar.c	iommu/dmar: Remove redundant ' != 0' when check return code	2017-03-22 15:42:17 +01:00
exynos-iommu.c	Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'arm/mediatek', 'arm/core', 'x86/vt-d' and 'core' into next	2017-02-10 15:13:10 +01:00
fsl_pamu_domain.c	iommu/fsl: Convert to device_group call-back	2015-10-22 00:00:49 +02:00
fsl_pamu_domain.h	iommu/fsl: Make use of domain_alloc and domain_free	2015-03-31 15:32:14 +02:00
fsl_pamu.c	powerpc/fsl: Move fsl_guts.h out of arch/powerpc	2015-10-21 18:05:50 -05:00
fsl_pamu.h	iommu/fsl: Various cleanups	2015-02-03 18:47:18 +01:00
intel_irq_remapping.c	SVM fixes for Linux 4.5	2016-02-16 08:04:06 -08:00
intel-iommu.c	x86, iommu/vt-d: Add an option to disable Intel IOMMU force on	2017-04-26 23:57:53 +02:00
intel-svm.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>	2017-03-02 08:42:28 +01:00
io-pgtable-arm-v7s.c	iommu/io-pgtable-arm-v7s: Add support for the IOMMU_PRIV flag	2017-01-19 15:56:18 +00:00
io-pgtable-arm.c	iommu/io-pgtable-arm: add support for the IOMMU_PRIV flag	2017-01-19 15:56:18 +00:00
io-pgtable.c	iommu/io-pgtable: Fix a brace coding style issue.	2016-04-05 15:34:29 +02:00
io-pgtable.h	iommu/io-pgtable: Add MTK 4GB mode in Short-descriptor	2016-04-05 15:39:37 +02:00
iommu-sysfs.c	iommu: Make iommu_device_link/unlink take a struct iommu_device	2017-02-10 13:44:57 +01:00
iommu-traces.c	iommu: Add iommu_error class event to iommu trace	2013-09-25 11:07:04 +02:00
iommu.c	Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'arm/mediatek', 'arm/core', 'x86/vt-d' and 'core' into next	2017-02-10 15:13:10 +01:00
iova.c	iommu/iova: Use rb_entry()	2017-01-04 15:35:19 +01:00
ipmmu-vmsa.c	iommu/ipmmu-vmsa: Restrict IOMMU Domain Geometry to 32-bit address space	2017-02-06 13:09:43 +01:00
irq_remapping.c	x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage	2016-04-13 11:37:41 +02:00
irq_remapping.h	iommu, x86: Setup Posted-Interrupts capability for Intel iommu	2015-06-12 11:33:52 +02:00
Kconfig	iommu/mediatek: Remove bogus 'select' statements	2017-02-06 13:16:22 +01:00
Makefile	Merge branches 'x86/amd', 'x86/vt-d', 'arm/exynos', 'arm/mediatek', 'arm/msm', 'arm/rockchip', 'arm/smmu' and 'core' into next	2016-07-26 16:02:37 +02:00
msm_iommu_hw-8xxx.h	iommu/msm: Move mach includes to iommu directory	2013-08-06 11:18:03 -07:00
msm_iommu.c	iommu: Remove iommu_register_instance interface	2017-02-10 14:54:37 +01:00
msm_iommu.h	iommu/msm: Make use of iommu_device_register interface	2017-02-10 13:44:57 +01:00
mtk_iommu_v1.c	Merge branches 'arm/mediatek', 'arm/smmu', 'x86/amd', 's390', 'core' and 'arm/exynos' into next	2016-12-06 17:32:16 +01:00
mtk_iommu.c	iommu: Remove iommu_register_instance interface	2017-02-10 14:54:37 +01:00
mtk_iommu.h	iommu/mediatek: Make use of iommu_device_register interface	2017-02-10 13:44:57 +01:00
of_iommu.c	Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'arm/mediatek', 'arm/core', 'x86/vt-d' and 'core' into next	2017-02-10 15:13:10 +01:00
omap-iommu-debug.c	iommu/omap: Align code with open parenthesis	2016-04-05 17:53:20 +02:00
omap-iommu.c	iommu/omap: Use WARN_ON for page table alignment check	2016-04-05 17:53:20 +02:00
omap-iommu.h	iommu/omap: Add support for configuring dsp iommus on DRA7xx	2015-10-14 14:35:47 +02:00
omap-iopgtable.h	iommu/omap: Use BIT(x) macros in omap-iopgtable.h	2015-08-03 16:04:42 +02:00
rockchip-iommu.c	iommu/rockchip: Prepare to support generic DMA mapping	2016-06-27 14:50:08 +02:00
s390-iommu.c	iommu/s390: Drop duplicate header pci.h	2016-11-29 17:37:58 +01:00
tegra-gart.c	Merge branches 'iommu/fixes', 'x86/vt-d', 'x86/amd', 'arm/smmu', 'arm/tegra' and 'core' into next	2015-04-02 13:33:19 +02:00
tegra-smmu.c	iommu/tegra-smmu: Parameterize number of TLB lines	2015-08-13 17:05:28 +02:00