Messages in this thread Patch in this message | | | Subject | Re: [PATCH] iommu/vt-d: Handle hotplug devices' default identity mapping setting | From | Lu Baolu <> | Date | Fri, 22 Feb 2019 13:30:30 +0800 |
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Hi
On 2/22/19 1:06 PM, Lu Baolu wrote:
> Do you mind checking this? > > diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c > index 6ecdcf8fc8c0..f62f30bc1339 100644 > --- a/drivers/iommu/intel-iommu.c > +++ b/drivers/iommu/intel-iommu.c > @@ -2632,6 +2632,9 @@ static struct dmar_domain > *find_or_alloc_domain(struct device *dev, int gaw) > goto out; > } > > + if (!iommu_should_identity_map(dev, 0)) > + return si_domain; > + > /* Allocate and initialize new domain for the device */ > domain = alloc_domain(0); > if (!domain)
Oops! This can't be compiled. Please try below instead if you'd like to. Sorry about it.
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 6ecdcf8fc8c0..b89f5ba6a3c8 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -174,6 +174,8 @@ static inline unsigned long virt_to_dma_pfn(void *p) return page_to_dma_pfn(virt_to_page(p)); }
+static int iommu_should_identity_map(struct device *dev, int startup); + /* global iommu list, set NULL for ignored DMAR units */ static struct intel_iommu **g_iommus;
@@ -2632,6 +2634,9 @@ static struct dmar_domain *find_or_alloc_domain(struct device *dev, int gaw) goto out; }
+ if (iommu_should_identity_map(dev, 0)) + return si_domain; + /* Allocate and initialize new domain for the device */ domain = alloc_domain(0); if (!domain) Best regards, Lu Baolu
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