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16a75bbe48
linux/drivers/iommu
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Jacob Pan 16a75bbe48 iommu/vt-d: Avoid superfluous IOTLB tracking in lazy mode 
Intel IOMMU driver implements IOTLB flush queue with domain selective
or PASID selective invalidations. In this case there's no need to track
IOVA page range and sync IOTLBs, which may cause significant performance
hit.

This patch adds a check to avoid IOVA gather page and IOTLB sync for
the lazy path.

The performance difference on Sapphire Rapids 100Gb NIC is improved by
the following (as measured by iperf send):

w/o this fix~48 Gbits/s. with this fix ~54 Gbits/s

Cc: <stable@vger.kernel.org>
Fixes: 2a2b8eaa5b ("iommu: Handle freelists when using deferred flushing in iommu drivers")
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Link: https://lore.kernel.org/r/20230209175330.1783556-1-jacob.jun.pan@linux.intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2023-02-16 14:43:05 +01:00
..
amd IOMMU Updates for Linux v6.2 2022-12-19 08:34:39 -06:00
arm Merge branches 'arm/allwinner', 'arm/exynos', 'arm/mediatek', 'arm/rockchip', 'arm/smmu', 'ppc/pamu', 's390', 'x86/vt-d', 'x86/amd' and 'core' into next 2022-12-12 12:50:53 +01:00
intel iommu/vt-d: Avoid superfluous IOTLB tracking in lazy mode 2023-02-16 14:43:05 +01:00
iommufd iommufd for 6.2 2022-12-14 09:15:43 -08:00
apple-dart.c iommu: Add gfp parameter to iommu_alloc_resv_region 2022-10-21 10:49:32 +02:00
dma-iommu.c dma-mapping: reject __GFP_COMP in dma_alloc_attrs 2022-11-21 09:37:20 +01:00
dma-iommu.h iommu/dma: Make header private 2022-09-09 09:26:22 +02:00
exynos-iommu.c iommu/exynos: Fix driver initialization sequence 2022-11-19 10:33:15 +01:00
fsl_pamu_domain.c iommu: Regulate EINVAL in ->attach_dev callback functions 2022-11-01 14:39:59 -03:00
fsl_pamu_domain.h iommu/fsl_pamu: remove the snoop_id field 2021-04-07 10:56:52 +02:00
fsl_pamu.c Merge branches 'arm/allwinner', 'arm/exynos', 'arm/mediatek', 'arm/rockchip', 'arm/smmu', 'ppc/pamu', 's390', 'x86/vt-d', 'x86/amd' and 'core' into next 2022-12-12 12:50:53 +01:00
fsl_pamu.h iommu/fsl_pamu: hardcode the window address and size in pamu_config_ppaace 2021-04-07 10:56:52 +02:00
hyperv-iommu.c iommu/hyper-v: Allow hyperv irq remapping without x2apic 2022-11-28 16:48:20 +00:00
io-pgfault.c iommu: Rename iommu-sva-lib.{c,h} 2022-11-03 15:47:54 +01:00
io-pgtable-arm-v7s.c iommu/io-pgtable-arm-v7s: Remove map/unmap 2022-11-19 10:44:15 +01:00
io-pgtable-arm.c iommu/io-pgtable-arm: Remove map/unmap 2022-11-19 10:44:15 +01:00
io-pgtable-arm.h iommu/io-pgtable-arm: Move some definitions to a header 2020-09-28 23:48:06 +01:00
io-pgtable-dart.c iommu/io-pgtable-dart: Add DART PTE support for t6000 2022-09-26 13:49:40 +02:00
io-pgtable.c Merge branches 'apple/dart', 'arm/mediatek', 'arm/omap', 'arm/smmu', 'virtio', 'x86/vt-d', 'x86/amd' and 'core' into next 2022-09-26 15:52:31 +02:00
ioasid.c iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit 2022-02-15 11:31:35 +01:00
iommu-debugfs.c
iommu-sva.c iommu: Rename iommu-sva-lib.{c,h} 2022-11-03 15:47:54 +01:00
iommu-sva.h iommu: Rename iommu-sva-lib.{c,h} 2022-11-03 15:47:54 +01:00
iommu-sysfs.c
iommu-traces.c
iommu.c IOMMU Updates for Linux v6.2 2022-12-19 08:34:39 -06:00
iova.c iova: Remove iovad->rcaches check in iova_rcache_get() 2022-09-09 09:27:03 +02:00
ipmmu-vmsa.c iommu/ipmmu-vmsa: Update to {map,unmap}_pages 2022-11-19 10:44:14 +01:00
irq_remapping.c x86: Kill all traces of irq_remapping_get_irq_domain() 2020-10-28 20:26:28 +01:00
irq_remapping.h x86: Kill all traces of irq_remapping_get_irq_domain() 2020-10-28 20:26:28 +01:00
Kconfig iommufd for 6.2 2022-12-14 09:15:43 -08:00
Makefile iommufd: File descriptor, context, kconfig and makefiles 2022-11-30 20:16:49 -04:00
msm_iommu_hw-8xxx.h
msm_iommu.c iommu/msm: Update to {map,unmap}_pages 2022-11-19 10:44:14 +01:00
msm_iommu.h
mtk_iommu_v1.c iommu/mediatek-v1: Update to {map,unmap}_pages 2022-11-19 10:44:12 +01:00
mtk_iommu.c Merge branches 'arm/allwinner', 'arm/exynos', 'arm/mediatek', 'arm/rockchip', 'arm/smmu', 'ppc/pamu', 's390', 'x86/vt-d', 'x86/amd' and 'core' into next 2022-12-12 12:50:53 +01:00
of_iommu.c iommu/of: Remove linux/msi.h include 2022-11-23 23:07:38 +01:00
omap-iommu-debug.c iommu/omap: Fix buffer overflow in debugfs 2022-09-07 10:42:28 +02:00
omap-iommu.c iommu: Use EINVAL for incompatible device/domain in ->attach_dev 2022-11-01 14:39:59 -03:00
omap-iommu.h
omap-iopgtable.h
rockchip-iommu.c iommu/rockchip: fix permission bits in page table entries v2 2022-11-03 15:58:41 +01:00
s390-iommu.c s390/pci: use lock-free I/O translation updates 2022-11-19 10:28:18 +01:00
sprd-iommu.c iommu/sprd: Update to {map,unmap}_pages 2022-11-19 10:44:13 +01:00
sun50i-iommu.c iommu/sun50i: Remove IOMMU_DOMAIN_IDENTITY 2022-12-05 11:52:57 +01:00
tegra-gart.c iommu: Use EINVAL for incompatible device/domain in ->attach_dev 2022-11-01 14:39:59 -03:00
tegra-smmu.c iommu/tegra-smmu: Clean up bus_set_iommu() 2022-09-07 14:26:16 +02:00
virtio-iommu.c iommu: Propagate return value in ->attach_dev callback functions 2022-11-01 14:39:59 -03:00