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authorJoerg Roedel <joerg.roedel@amd.com>2009-12-10 11:03:39 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-12-10 12:21:31 +0100
commitb7cc9554bc73641c9ed4d7eb74b2d6e78f20abea (patch)
tree42a90d0bcef2932b3aca414bf6620fb13685e9b7 /arch
parent4528752f49c1f4025473d12bc5fa9181085c3f22 (diff)
downloadlinux-stericsson-b7cc9554bc73641c9ed4d7eb74b2d6e78f20abea.tar.gz
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/amd_iommu_proto.h3
-rw-r--r--arch/x86/kernel/amd_iommu.c39
-rw-r--r--arch/x86/kernel/amd_iommu_init.c7
3 files changed, 46 insertions, 3 deletions
diff --git a/arch/x86/include/asm/amd_iommu_proto.h b/arch/x86/include/asm/amd_iommu_proto.h
index 84786fb9a23b..2566e2606224 100644
--- a/arch/x86/include/asm/amd_iommu_proto.h
+++ b/arch/x86/include/asm/amd_iommu_proto.h
@@ -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) { }
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 32fb09102a13..450dd6ac03d3 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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;
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 7ffc39965233..df01c691d130 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -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 @@ out:
return ret;
free:
+
+ amd_iommu_uninit_devices();
+
free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
get_order(MAX_DOMAIN_ID/8));