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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Robin Murphy <robin.murphy@arm.com>, joro@8bytes.org, will@kernel.org
Cc: baolu.lu@linux.intel.com, iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, suravee.suthikulpanit@amd.com,
	john.garry@huawei.com, dianders@chromium.org
Subject: Re: [PATCH v2 17/24] iommu/vt-d: Prepare for multiple DMA domain types
Date: Fri, 30 Jul 2021 14:09:11 +0800	[thread overview]
Message-ID: <ad334873-b148-b9b7-efc7-e1c753937f85@linux.intel.com> (raw)
In-Reply-To: <3cf1ab93d3a4868db3b2e60c7c9781619e449694.1627468309.git.robin.murphy@arm.com>

On 7/28/21 11:58 PM, Robin Murphy wrote:
> In preparation for the strict vs. non-strict decision for DMA domains
> to be expressed in the domain type, make sure we expose our flush queue
> awareness by accepting the new domain type, and test the specific
> feature flag where we want to identify DMA domains in general. The DMA
> ops reset/setup can simply be made unconditional, since iommu-dma
> already knows only to touch DMA domains.
> 
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
>   drivers/iommu/intel/iommu.c | 15 ++++++---------
>   1 file changed, 6 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
> index 7e168634c433..8fc46c9d6b96 100644
> --- a/drivers/iommu/intel/iommu.c
> +++ b/drivers/iommu/intel/iommu.c
> @@ -582,7 +582,7 @@ struct intel_iommu *domain_get_iommu(struct dmar_domain *domain)
>   	int iommu_id;
>   
>   	/* si_domain and vm domain should not get here. */
> -	if (WARN_ON(domain->domain.type != IOMMU_DOMAIN_DMA))
> +	if (WARN_ON(!iommu_is_dma_domain(&domain->domain)))
>   		return NULL;
>   
>   	for_each_domain_iommu(iommu_id, domain)
> @@ -1034,7 +1034,7 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
>   			pteval = ((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT) | DMA_PTE_READ | DMA_PTE_WRITE;
>   			if (domain_use_first_level(domain)) {
>   				pteval |= DMA_FL_PTE_XD | DMA_FL_PTE_US;
> -				if (domain->domain.type == IOMMU_DOMAIN_DMA)
> +				if (iommu_is_dma_domain(&domain->domain))
>   					pteval |= DMA_FL_PTE_ACCESS;
>   			}
>   			if (cmpxchg64(&pte->val, 0ULL, pteval))
> @@ -2345,7 +2345,7 @@ __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
>   	if (domain_use_first_level(domain)) {
>   		attr |= DMA_FL_PTE_XD | DMA_FL_PTE_US;
>   
> -		if (domain->domain.type == IOMMU_DOMAIN_DMA) {
> +		if (iommu_is_dma_domain(&domain->domain)) {
>   			attr |= DMA_FL_PTE_ACCESS;
>   			if (prot & DMA_PTE_WRITE)
>   				attr |= DMA_FL_PTE_DIRTY;
> @@ -4528,6 +4528,7 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
>   
>   	switch (type) {
>   	case IOMMU_DOMAIN_DMA:
> +	case IOMMU_DOMAIN_DMA_FQ:
>   	case IOMMU_DOMAIN_UNMANAGED:
>   		dmar_domain = alloc_domain(0);
>   		if (!dmar_domain) {
> @@ -5197,12 +5198,8 @@ static void intel_iommu_release_device(struct device *dev)
>   
>   static void intel_iommu_probe_finalize(struct device *dev)
>   {
> -	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
> -
> -	if (domain && domain->type == IOMMU_DOMAIN_DMA)
> -		iommu_setup_dma_ops(dev, 0, U64_MAX);
> -	else
> -		set_dma_ops(dev, NULL);
> +	set_dma_ops(dev, NULL);
> +	iommu_setup_dma_ops(dev, 0, U64_MAX);
>   }
>   
>   static void intel_iommu_get_resv_regions(struct device *device,
> 


Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>

Best regards,
baolu

  reply	other threads:[~2021-07-30  6:11 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-28 15:58 [PATCH v2 00/24] iommu: Refactor DMA domain strictness Robin Murphy
2021-07-28 15:58 ` [PATCH v2 01/24] iommu: Pull IOVA cookie management into the core Robin Murphy
2021-07-30  6:06   ` Lu Baolu
2021-07-30  9:32   ` Jean-Philippe Brucker
2021-07-28 15:58 ` [PATCH v2 02/24] iommu/amd: Drop IOVA cookie management Robin Murphy
2021-07-28 15:58 ` [PATCH v2 03/24] iommu/arm-smmu: " Robin Murphy
2021-07-28 15:58 ` [PATCH v2 04/24] iommu/vt-d: " Robin Murphy
2021-07-30  6:07   ` Lu Baolu
2021-07-28 15:58 ` [PATCH v2 05/24] iommu/exynos: " Robin Murphy
2021-07-28 15:58 ` [PATCH v2 06/24] iommu/ipmmu-vmsa: " Robin Murphy
2021-07-28 15:58 ` [PATCH v2 07/24] iommu/mtk: " Robin Murphy
2021-07-28 15:58 ` [PATCH v2 08/24] iommu/rockchip: " Robin Murphy
2021-07-28 15:58 ` [PATCH v2 09/24] iommu/sprd: " Robin Murphy
2021-07-28 15:58 ` [PATCH v2 10/24] iommu/sun50i: " Robin Murphy
2021-07-28 15:58 ` [PATCH v2 11/24] iommu/virtio: " Robin Murphy
2021-07-30  9:20   ` Jean-Philippe Brucker
2021-07-28 15:58 ` [PATCH v2 12/24] iommu/dma: Unexport " Robin Murphy
2021-07-30  6:07   ` Lu Baolu
2021-07-30  9:21   ` Jean-Philippe Brucker
2021-07-28 15:58 ` [PATCH v2 13/24] iommu/dma: Remove redundant "!dev" checks Robin Murphy
2021-07-30  6:08   ` Lu Baolu
2021-07-28 15:58 ` [PATCH v2 14/24] iommu: Introduce explicit type for non-strict DMA domains Robin Murphy
2021-07-30  6:08   ` Lu Baolu
2021-07-30  9:23   ` Jean-Philippe Brucker
2021-07-28 15:58 ` [PATCH v2 15/24] iommu/amd: Prepare for multiple DMA domain types Robin Murphy
2021-07-28 15:58 ` [PATCH v2 16/24] iommu/arm-smmu: " Robin Murphy
2021-07-28 15:58 ` [PATCH v2 17/24] iommu/vt-d: " Robin Murphy
2021-07-30  6:09   ` Lu Baolu [this message]
2021-07-28 15:58 ` [PATCH v2 18/24] iommu: Express DMA strictness via the domain type Robin Murphy
2021-07-29  7:13   ` Lu Baolu
2021-07-29  9:36     ` Robin Murphy
2021-07-29 12:42       ` Lu Baolu
2021-07-30  6:09       ` Lu Baolu
2021-07-28 15:58 ` [PATCH v2 19/24] iommu: Expose DMA domain strictness via sysfs Robin Murphy
2021-07-30  6:10   ` Lu Baolu
2021-07-30  9:28   ` Jean-Philippe Brucker
2021-07-30 10:20   ` John Garry
2021-07-28 15:58 ` [PATCH v2 20/24] iommu: Merge strictness and domain type configs Robin Murphy
2021-07-30  6:10   ` Lu Baolu
2021-07-30  9:29   ` Jean-Philippe Brucker
2021-07-30  9:33   ` John Garry
2021-07-28 15:58 ` [PATCH v2 21/24] iommu/dma: Factor out flush queue init Robin Murphy
2021-07-30  6:11   ` Lu Baolu
2021-07-30  9:20   ` John Garry
2021-07-28 15:58 ` [PATCH v2 22/24] iommu: Allow enabling non-strict mode dynamically Robin Murphy
2021-07-30  6:11   ` Lu Baolu
2021-07-30  9:24   ` John Garry
2021-07-28 15:58 ` [PATCH v2 23/24] iommu/arm-smmu: Allow non-strict in pgtable_quirks interface Robin Murphy
2021-08-02 13:04   ` Will Deacon
2021-08-02 14:15     ` Robin Murphy
2021-08-03 10:36       ` Will Deacon
2021-08-03 12:13         ` Robin Murphy
2021-08-03 12:35           ` Will Deacon
2021-07-28 15:58 ` [PATCH v2 24/24] iommu: Only log strictness for DMA domains Robin Murphy
2021-07-29  9:04   ` John Garry
2021-07-30  6:12   ` Lu Baolu
2021-07-29  2:55 ` [PATCH v2 00/24] iommu: Refactor DMA domain strictness chenxiang (M)
2021-07-29 10:59   ` Robin Murphy
2021-07-30  1:21     ` chenxiang (M)
2021-07-29 15:04 ` Heiko Stübner
2021-07-29 15:43   ` Robin Murphy
2021-07-29 15:53     ` Heiko Stübner
2021-07-29 16:29       ` Robin Murphy
2021-07-29 22:33 ` Doug Anderson
2021-07-30  0:06   ` Doug Anderson

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