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| author | David Woodhouse <dwmw2@infradead.org> | 2012-05-25 17:42:54 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-25 15:50:29 -0700 |
| commit | e2ad23d04c1304431ab5176c89b7b476ded2d995 (patch) | |
| tree | b9fbe128486b9e2ea20832f0b2273b4c26b78fa1 /drivers/iommu | |
| parent | da89fb165e5e51a2ec1ff8a0ff6bc052d1068184 (diff) | |
| download | op-kernel-dev-e2ad23d04c1304431ab5176c89b7b476ded2d995.zip op-kernel-dev-e2ad23d04c1304431ab5176c89b7b476ded2d995.tar.gz | |
intel-iommu: Add device info into list before doing context mapping
Add device info into list before doing context mapping, because device
info will be used by iommu_enable_dev_iotlb(). Without it, ATS won't get
enabled as it should be.
ATS, while a dubious decision from a security point of view, can be very
important for performance.
Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index bf2fbaa..abab245 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2287,12 +2287,6 @@ static int domain_add_dev_info(struct dmar_domain *domain, if (!info) return -ENOMEM; - ret = domain_context_mapping(domain, pdev, translation); - if (ret) { - free_devinfo_mem(info); - return ret; - } - info->segment = pci_domain_nr(pdev->bus); info->bus = pdev->bus->number; info->devfn = pdev->devfn; @@ -2305,6 +2299,17 @@ static int domain_add_dev_info(struct dmar_domain *domain, pdev->dev.archdata.iommu = info; spin_unlock_irqrestore(&device_domain_lock, flags); + ret = domain_context_mapping(domain, pdev, translation); + if (ret) { + spin_lock_irqsave(&device_domain_lock, flags); + list_del(&info->link); + list_del(&info->global); + pdev->dev.archdata.iommu = NULL; + spin_unlock_irqrestore(&device_domain_lock, flags); + free_devinfo_mem(info); + return ret; + } + return 0; } |
