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intel-iommu: Use iommu_should_identity_map() at startup time too. 

At boot time, the dma_mask won't have been set on any devices, so we
assume that all devices will be 64-bit capable (and thus get a 1:1 map).

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2009-07-04 18:24:27 +01:00
parent 736768325e
commit 6941af2810
1 changed files with 14 additions and 11 deletions
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25
drivers/pci/intel-iommu.c
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@ -2117,6 +2117,17 @@ static int domain_add_dev_info(struct dmar_domain *domain,
return 0;
}
static int iommu_should_identity_map(struct pci_dev *pdev, int startup)
{
if (iommu_identity_mapping == 2)
return IS_GFX_DEVICE(pdev);
if (!startup)
return pdev->dma_mask > DMA_BIT_MASK(32);
return 1;
}
static int iommu_prepare_static_identity_mapping(void)
{
struct pci_dev *pdev = NULL;
@ -2127,7 +2138,7 @@ static int iommu_prepare_static_identity_mapping(void)
return -EFAULT;
for_each_pci_dev(pdev) {
if (iommu_identity_mapping == 1 || IS_GFX_DEVICE(pdev)) {
if (iommu_should_identity_map(pdev, 1)) {
printk(KERN_INFO "IOMMU: identity mapping for device %s\n",
pci_name(pdev));
@ -2448,14 +2459,6 @@ static int iommu_dummy(struct pci_dev *pdev)
return pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO;
}
static int iommu_should_identity_map(struct pci_dev *pdev)
{
if (iommu_identity_mapping == 2)
return IS_GFX_DEVICE(pdev);
else
return pdev->dma_mask > DMA_BIT_MASK(32);
}
/* Check if the pdev needs to go through non-identity map and unmap process.*/
static int iommu_no_mapping(struct device *dev)
{
@ -2474,7 +2477,7 @@ static int iommu_no_mapping(struct device *dev)
found = identity_mapping(pdev);
if (found) {
if (iommu_should_identity_map(pdev))
if (iommu_should_identity_map(pdev, 0))
return 1;
else {
/*
@ -2491,7 +2494,7 @@ static int iommu_no_mapping(struct device *dev)
* In case of a detached 64 bit DMA device from vm, the device
* is put into si_domain for identity mapping.
*/
if (iommu_should_identity_map(pdev)) {
if (iommu_should_identity_map(pdev, 0)) {
int ret;
ret = domain_add_dev_info(si_domain, pdev);
if (ret)