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x86/amd-iommu: Fix passthrough mode 

The data structure changes to use dev->archdata.iommu field
broke the iommu=pt mode because in this case the
dev->archdata.iommu was left uninitialized. This moves the
inititalization of the devices into the main init function
and fixes the problem.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-12-10 11:03:39 +01:00
parent 4528752f49
commit b7cc9554bc
3 changed files with 46 additions and 3 deletions
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3
arch/x86/include/asm/amd_iommu_proto.h
View File

@ -28,7 +28,8 @@ extern void amd_iommu_flush_all_domains(void);
extern void amd_iommu_flush_all_devices(void);
extern void amd_iommu_apply_erratum_63(u16 devid);
extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
extern int amd_iommu_init_devices(void);
extern void amd_iommu_uninit_devices(void);
#ifndef CONFIG_AMD_IOMMU_STATS
static inline void amd_iommu_stats_init(void) { }

39
arch/x86/kernel/amd_iommu.c
View File

@ -166,6 +166,43 @@ static void iommu_uninit_device(struct device *dev)
{
kfree(dev->archdata.iommu);
}
void __init amd_iommu_uninit_devices(void)
{
struct pci_dev *pdev = NULL;
for_each_pci_dev(pdev) {
if (!check_device(&pdev->dev))
continue;
iommu_uninit_device(&pdev->dev);
}
}
int __init amd_iommu_init_devices(void)
{
struct pci_dev *pdev = NULL;
int ret = 0;
for_each_pci_dev(pdev) {
if (!check_device(&pdev->dev))
continue;
ret = iommu_init_device(&pdev->dev);
if (ret)
goto out_free;
}
return 0;
out_free:
amd_iommu_uninit_devices();
return ret;
}
#ifdef CONFIG_AMD_IOMMU_STATS
/*
@ -2145,8 +2182,6 @@ static void prealloc_protection_domains(void)
if (!check_device(&dev->dev))
continue;
iommu_init_device(&dev->dev);
/* Is there already any domain for it? */
if (domain_for_device(&dev->dev))
continue;

7
arch/x86/kernel/amd_iommu_init.c
View File

@ -1274,6 +1274,10 @@ static int __init amd_iommu_init(void)
if (ret)
goto free;
ret = amd_iommu_init_devices();
if (ret)
goto free;
if (iommu_pass_through)
ret = amd_iommu_init_passthrough();
else
@ -1296,6 +1300,9 @@ static int __init amd_iommu_init(void)
return ret;
free:
amd_iommu_uninit_devices();
free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
get_order(MAX_DOMAIN_ID/8));