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See http://www.infradead.org/rpr.html Cc: freedreno@lists.freedesktop.org, kvm@vger.kernel.org, Michael Ellerman , linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, iommu@lists.linux-foundation.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, David Woodhouse , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Signed-off-by: Christoph Hellwig --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 40 ++++++--------------- drivers/iommu/arm/arm-smmu/arm-smmu.c | 30 ++++++++++------ drivers/iommu/intel/iommu.c | 28 +++++---------- drivers/iommu/iommu.c | 8 +++++ drivers/vfio/vfio_iommu_type1.c | 5 +-- include/linux/iommu.h | 4 ++- 6 files changed, 50 insertions(+), 65 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index bf96172e8c1f71..8e6fee3ea454d3 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2466,41 +2466,21 @@ static void arm_smmu_dma_enable_flush_queue(struct iommu_domain *domain) to_smmu_domain(domain)->non_strict = true; } -static int arm_smmu_domain_set_attr(struct iommu_domain *domain, - enum iommu_attr attr, void *data) +static int arm_smmu_domain_enable_nesting(struct iommu_domain *domain) { - int ret = 0; struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + int ret = -EPERM; - mutex_lock(&smmu_domain->init_mutex); + if (domain->type != IOMMU_DOMAIN_UNMANAGED) + return -EINVAL; - switch (domain->type) { - case IOMMU_DOMAIN_UNMANAGED: - switch (attr) { - case DOMAIN_ATTR_NESTING: - if (smmu_domain->smmu) { - ret = -EPERM; - goto out_unlock; - } - - if (*(int *)data) - smmu_domain->stage = ARM_SMMU_DOMAIN_NESTED; - else - smmu_domain->stage = ARM_SMMU_DOMAIN_S1; - break; - default: - ret = -ENODEV; - } - break; - case IOMMU_DOMAIN_DMA: - ret = -ENODEV; - break; - default: - ret = -EINVAL; + mutex_lock(&smmu_domain->init_mutex); + if (!smmu_domain->smmu) { + smmu_domain->stage = ARM_SMMU_DOMAIN_NESTED; + ret = 0; } - -out_unlock: mutex_unlock(&smmu_domain->init_mutex); + return ret; } @@ -2603,7 +2583,7 @@ static struct iommu_ops arm_smmu_ops = { .device_group = arm_smmu_device_group, .dma_use_flush_queue = arm_smmu_dma_use_flush_queue, .dma_enable_flush_queue = arm_smmu_dma_enable_flush_queue, - .domain_set_attr = arm_smmu_domain_set_attr, + .domain_enable_nesting = arm_smmu_domain_enable_nesting, .of_xlate = arm_smmu_of_xlate, .get_resv_regions = arm_smmu_get_resv_regions, .put_resv_regions = generic_iommu_put_resv_regions, diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index e7893e96f5177a..2e17d990d04481 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -1497,6 +1497,24 @@ static void arm_smmu_dma_enable_flush_queue(struct iommu_domain *domain) to_smmu_domain(domain)->pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT; } +static int arm_smmu_domain_enable_nesting(struct iommu_domain *domain) +{ + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + int ret = -EPERM; + + if (domain->type != IOMMU_DOMAIN_UNMANAGED) + return -EINVAL; + + mutex_lock(&smmu_domain->init_mutex); + if (!smmu_domain->smmu) { + smmu_domain->stage = ARM_SMMU_DOMAIN_NESTED; + ret = 0; + } + mutex_unlock(&smmu_domain->init_mutex); + + return ret; +} + static int arm_smmu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr attr, void *data) { @@ -1508,17 +1526,6 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain, switch(domain->type) { case IOMMU_DOMAIN_UNMANAGED: switch (attr) { - case DOMAIN_ATTR_NESTING: - if (smmu_domain->smmu) { - ret = -EPERM; - goto out_unlock; - } - - if (*(int *)data) - smmu_domain->stage = ARM_SMMU_DOMAIN_NESTED; - else - smmu_domain->stage = ARM_SMMU_DOMAIN_S1; - break; case DOMAIN_ATTR_IO_PGTABLE_CFG: { struct io_pgtable_domain_attr *pgtbl_cfg = data; @@ -1603,6 +1610,7 @@ static struct iommu_ops arm_smmu_ops = { .dma_use_flush_queue = arm_smmu_dma_use_flush_queue, .dma_enable_flush_queue = arm_smmu_dma_enable_flush_queue, .domain_set_attr = arm_smmu_domain_set_attr, + .domain_enable_nesting = arm_smmu_domain_enable_nesting, .of_xlate = arm_smmu_of_xlate, .get_resv_regions = arm_smmu_get_resv_regions, .put_resv_regions = generic_iommu_put_resv_regions, diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index eaa80c33f4bc91..0f1374d6612a60 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -5423,32 +5423,22 @@ static bool intel_iommu_is_attach_deferred(struct iommu_domain *domain, } static int -intel_iommu_domain_set_attr(struct iommu_domain *domain, - enum iommu_attr attr, void *data) +intel_iommu_domain_enable_nesting(struct iommu_domain *domain) { struct dmar_domain *dmar_domain = to_dmar_domain(domain); unsigned long flags; - int ret = 0; + int ret = -ENODEV; if (domain->type != IOMMU_DOMAIN_UNMANAGED) return -EINVAL; - switch (attr) { - case DOMAIN_ATTR_NESTING: - spin_lock_irqsave(&device_domain_lock, flags); - if (nested_mode_support() && - list_empty(&dmar_domain->devices)) { - dmar_domain->flags |= DOMAIN_FLAG_NESTING_MODE; - dmar_domain->flags &= ~DOMAIN_FLAG_USE_FIRST_LEVEL; - } else { - ret = -ENODEV; - } - spin_unlock_irqrestore(&device_domain_lock, flags); - break; - default: - ret = -EINVAL; - break; + spin_lock_irqsave(&device_domain_lock, flags); + if (nested_mode_support() && list_empty(&dmar_domain->devices)) { + dmar_domain->flags |= DOMAIN_FLAG_NESTING_MODE; + dmar_domain->flags &= ~DOMAIN_FLAG_USE_FIRST_LEVEL; + ret = 0; } + spin_unlock_irqrestore(&device_domain_lock, flags); return ret; } @@ -5556,7 +5546,7 @@ const struct iommu_ops intel_iommu_ops = { .domain_alloc = intel_iommu_domain_alloc, .domain_free = intel_iommu_domain_free, .dma_use_flush_queue = intel_iommu_dma_use_flush_queue, - .domain_set_attr = intel_iommu_domain_set_attr, + .domain_enable_nesting = intel_iommu_domain_enable_nesting, .attach_dev = intel_iommu_attach_device, .detach_dev = intel_iommu_detach_device, .aux_attach_dev = intel_iommu_aux_attach_device, diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 0f12c4d58cdc42..2e9e058501a953 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2685,6 +2685,14 @@ int iommu_domain_set_attr(struct iommu_domain *domain, } EXPORT_SYMBOL_GPL(iommu_domain_set_attr); +int iommu_domain_enable_nesting(struct iommu_domain *domain) +{ + if (!domain->ops->domain_enable_nesting) + return -EINVAL; + return domain->ops->domain_enable_nesting(domain); +} +EXPORT_SYMBOL_GPL(iommu_domain_enable_nesting); + void iommu_get_resv_regions(struct device *dev, struct list_head *list) { const struct iommu_ops *ops = dev->bus->iommu_ops; diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index c8e57f22f421c5..9cea4d80dd66ed 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -2320,10 +2320,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, } if (iommu->nesting) { - int attr = 1; - - ret = iommu_domain_set_attr(domain->domain, DOMAIN_ATTR_NESTING, - &attr); + ret = iommu_domain_enable_nesting(domain->domain); if (ret) goto out_domain; } diff --git a/include/linux/iommu.h b/include/linux/iommu.h index f30de33c6ff56e..aed88aa3bd3edf 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -107,7 +107,6 @@ enum iommu_cap { */ enum iommu_attr { - DOMAIN_ATTR_NESTING, /* two stages of translation */ DOMAIN_ATTR_IO_PGTABLE_CFG, DOMAIN_ATTR_MAX, }; @@ -196,6 +195,7 @@ struct iommu_iotlb_gather { * @dma_use_flush_queue: Returns %true if a DMA flush queue is used * @dma_enable_flush_queue: Try to enable the DMA flush queue * @domain_set_attr: Change domain attributes + * @domain_enable_nesting: Enable nesting * @get_resv_regions: Request list of reserved regions for a device * @put_resv_regions: Free list of reserved regions for a device * @apply_resv_region: Temporary helper call-back for iova reserved ranges @@ -248,6 +248,7 @@ struct iommu_ops { void (*dma_enable_flush_queue)(struct iommu_domain *domain); int (*domain_set_attr)(struct iommu_domain *domain, enum iommu_attr attr, void *data); + int (*domain_enable_nesting)(struct iommu_domain *domain); /* Request/Free a list of reserved regions for a device */ void (*get_resv_regions)(struct device *dev, struct list_head *list); @@ -494,6 +495,7 @@ extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *); bool iommu_dma_use_flush_queue(struct iommu_domain *domain); extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr, void *data); +int iommu_domain_enable_nesting(struct iommu_domain *domain); extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev, unsigned long iova, int flags); -- 2.29.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu