From b7cc9554bc73641c9ed4d7eb74b2d6e78f20abea Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 10 Dec 2009 11:03:39 +0100 Subject: [PATCH] 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 --- arch/x86/include/asm/amd_iommu_proto.h | 3 +- arch/x86/kernel/amd_iommu.c | 39 ++++++++++++++++++++++++-- arch/x86/kernel/amd_iommu_init.c | 7 +++++ 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)); -- 2.20.1