[PATCH 1/2] iommu/vt-d: Detach domain before using a private one
When the default domain of a group doesn't work for a device, the iommu driver will try to use a private domain. The domain which was previously attached to the device must be detached. Cc: Ashok Raj Cc: Jacob Pan Cc: Kevin Tian Cc: Alex Williamson Fixes: 942067f1b6b97 ("iommu/vt-d: Identify default domains replaced with private") Reported-by: Alex Williamson Link: https://lkml.org/lkml/2019/8/2/1379 Signed-off-by: Lu Baolu --- drivers/iommu/intel-iommu.c | 6 +- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 3e22fa6ae8c8..37259b7f95a7 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3449,6 +3449,7 @@ static bool iommu_need_mapping(struct device *dev) dmar_domain = to_dmar_domain(domain); dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; } + dmar_remove_one_dev_info(dev); get_private_domain_for_dev(dev); } @@ -4803,7 +4804,8 @@ static void dmar_remove_one_dev_info(struct device *dev) spin_lock_irqsave(&device_domain_lock, flags); info = dev->archdata.iommu; - __dmar_remove_one_dev_info(info); + if (info) + __dmar_remove_one_dev_info(info); spin_unlock_irqrestore(&device_domain_lock, flags); } @@ -5281,6 +5283,7 @@ static int intel_iommu_add_device(struct device *dev) if (device_def_domain_type(dev) == IOMMU_DOMAIN_IDENTITY) { ret = iommu_request_dm_for_dev(dev); if (ret) { + dmar_remove_one_dev_info(dev); dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; domain_add_dev_info(si_domain, dev); dev_info(dev, @@ -5291,6 +5294,7 @@ static int intel_iommu_add_device(struct device *dev) if (device_def_domain_type(dev) == IOMMU_DOMAIN_DMA) { ret = iommu_request_dma_domain_for_dev(dev); if (ret) { + dmar_remove_one_dev_info(dev); dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; if (!get_private_domain_for_dev(dev)) { dev_warn(dev, -- 2.17.1
Re: [PATCH 1/2] iommu/vt-d: Detach domain before using a private one
On Tue, 6 Aug 2019 08:14:08 +0800 Lu Baolu wrote: > When the default domain of a group doesn't work for a device, > the iommu driver will try to use a private domain. The domain > which was previously attached to the device must be detached. > > Cc: Ashok Raj > Cc: Jacob Pan > Cc: Kevin Tian > Cc: Alex Williamson > Fixes: 942067f1b6b97 ("iommu/vt-d: Identify default domains replaced with > private") > Reported-by: Alex Williamson > Link: https://lkml.org/lkml/2019/8/2/1379 > Signed-off-by: Lu Baolu > --- Tested-by: Alex Williamson This series resolves the issue I reported against: iommu/vt-d: Cleanup get_valid_domain_for_dev() Thanks, Alex > drivers/iommu/intel-iommu.c | 6 +- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c > index 3e22fa6ae8c8..37259b7f95a7 100644 > --- a/drivers/iommu/intel-iommu.c > +++ b/drivers/iommu/intel-iommu.c > @@ -3449,6 +3449,7 @@ static bool iommu_need_mapping(struct device *dev) > dmar_domain = to_dmar_domain(domain); > dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; > } > + dmar_remove_one_dev_info(dev); > get_private_domain_for_dev(dev); > } > > @@ -4803,7 +4804,8 @@ static void dmar_remove_one_dev_info(struct device *dev) > > spin_lock_irqsave(&device_domain_lock, flags); > info = dev->archdata.iommu; > - __dmar_remove_one_dev_info(info); > + if (info) > + __dmar_remove_one_dev_info(info); > spin_unlock_irqrestore(&device_domain_lock, flags); > } > > @@ -5281,6 +5283,7 @@ static int intel_iommu_add_device(struct device *dev) > if (device_def_domain_type(dev) == IOMMU_DOMAIN_IDENTITY) { > ret = iommu_request_dm_for_dev(dev); > if (ret) { > + dmar_remove_one_dev_info(dev); > dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; > domain_add_dev_info(si_domain, dev); > dev_info(dev, > @@ -5291,6 +5294,7 @@ static int intel_iommu_add_device(struct device *dev) > if (device_def_domain_type(dev) == IOMMU_DOMAIN_DMA) { > ret = iommu_request_dma_domain_for_dev(dev); > if (ret) { > + dmar_remove_one_dev_info(dev); > dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; > if (!get_private_domain_for_dev(dev)) { > dev_warn(dev,
Re: [PATCH 1/2] iommu/vt-d: Detach domain before using a private one
Hi Alex, On 8/9/19 4:10 AM, Alex Williamson wrote: On Tue, 6 Aug 2019 08:14:08 +0800 Lu Baolu wrote: When the default domain of a group doesn't work for a device, the iommu driver will try to use a private domain. The domain which was previously attached to the device must be detached. Cc: Ashok Raj Cc: Jacob Pan Cc: Kevin Tian Cc: Alex Williamson Fixes: 942067f1b6b97 ("iommu/vt-d: Identify default domains replaced with private") Reported-by: Alex Williamson Link: https://lkml.org/lkml/2019/8/2/1379 Signed-off-by: Lu Baolu --- Tested-by: Alex Williamson This series resolves the issue I reported against: iommu/vt-d: Cleanup get_valid_domain_for_dev() Thank you for testing it. Best regards, Baolu Thanks, Alex drivers/iommu/intel-iommu.c | 6 +- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 3e22fa6ae8c8..37259b7f95a7 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3449,6 +3449,7 @@ static bool iommu_need_mapping(struct device *dev) dmar_domain = to_dmar_domain(domain); dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; } + dmar_remove_one_dev_info(dev); get_private_domain_for_dev(dev); } @@ -4803,7 +4804,8 @@ static void dmar_remove_one_dev_info(struct device *dev) spin_lock_irqsave(&device_domain_lock, flags); info = dev->archdata.iommu; - __dmar_remove_one_dev_info(info); + if (info) + __dmar_remove_one_dev_info(info); spin_unlock_irqrestore(&device_domain_lock, flags); } @@ -5281,6 +5283,7 @@ static int intel_iommu_add_device(struct device *dev) if (device_def_domain_type(dev) == IOMMU_DOMAIN_IDENTITY) { ret = iommu_request_dm_for_dev(dev); if (ret) { + dmar_remove_one_dev_info(dev); dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; domain_add_dev_info(si_domain, dev); dev_info(dev, @@ -5291,6 +5294,7 @@ static int intel_iommu_add_device(struct device *dev) if (device_def_domain_type(dev) == IOMMU_DOMAIN_DMA) { ret = iommu_request_dma_domain_for_dev(dev); if (ret) { + dmar_remove_one_dev_info(dev); dmar_domain->flags |= DOMAIN_FLAG_LOSE_CHILDREN; if (!get_private_domain_for_dev(dev)) { dev_warn(dev, ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
Re: [PATCH 1/2] iommu/vt-d: Detach domain before using a private one
On Tue, Aug 06, 2019 at 08:14:08AM +0800, Lu Baolu wrote: > drivers/iommu/intel-iommu.c | 6 +- > 1 file changed, 5 insertions(+), 1 deletion(-) Applied to iommu/fixes, thanks. ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu