From e339b51c13ffb2173ea28679547f3abca7f4d76a Mon Sep 17 00:00:00 2001 From: Suravee Suthikulpanit Date: Thu, 21 Sep 2023 09:21:42 +0000 Subject: iommu/amd: Modify logic for checking GT and PPR features In order to support v2 page table, IOMMU driver need to check if the hardware can support Guest Translation (GT) and Peripheral Page Request (PPR) features. Currently, IOMMU driver uses global (amd_iommu_v2_present) and per-iommu (struct amd_iommu.is_iommu_v2) variables to track the features. There variables area redundant since we could simply just check the global EFR mask. Therefore, replace it with a helper function with appropriate name. Signed-off-by: Suravee Suthikulpanit Co-developed-by: Vasant Hegde Signed-off-by: Vasant Hegde Reviewed-by: Jason Gunthorpe Reviewed-by: Jerry Snitselaar Link: https://lore.kernel.org/r/20230921092147.5930-10-vasant.hegde@amd.com Signed-off-by: Joerg Roedel --- drivers/iommu/amd/amd_iommu.h | 6 ++++++ drivers/iommu/amd/amd_iommu_types.h | 5 ----- drivers/iommu/amd/init.c | 9 +-------- drivers/iommu/amd/iommu.c | 2 +- 4 files changed, 8 insertions(+), 14 deletions(-) (limited to 'drivers/iommu/amd') diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h index e1b0eeead074..5395a21215b9 100644 --- a/drivers/iommu/amd/amd_iommu.h +++ b/drivers/iommu/amd/amd_iommu.h @@ -102,6 +102,12 @@ static inline int check_feature_gpt_level(void) return ((amd_iommu_efr >> FEATURE_GATS_SHIFT) & FEATURE_GATS_MASK); } +static inline bool amd_iommu_gt_ppr_supported(void) +{ + return (check_feature(FEATURE_GT) && + check_feature(FEATURE_PPR)); +} + static inline u64 iommu_virt_to_phys(void *vaddr) { return (u64)__sme_set(virt_to_phys(vaddr)); diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index 22bdfb0ddfb7..29e76c1e9f9e 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -679,9 +679,6 @@ struct amd_iommu { /* Extended features 2 */ u64 features2; - /* IOMMUv2 */ - bool is_iommu_v2; - /* PCI device id of the IOMMU device */ u16 devid; @@ -890,8 +887,6 @@ extern unsigned long *amd_iommu_pd_alloc_bitmap; /* Smallest max PASID supported by any IOMMU in the system */ extern u32 amd_iommu_max_pasid; -extern bool amd_iommu_v2_present; - extern bool amd_iommu_force_isolation; /* Max levels of glxval supported */ diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index d0d506ad9cc9..06b319006ce2 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -187,7 +187,6 @@ bool amd_iommu_iotlb_sup __read_mostly = true; u32 amd_iommu_max_pasid __read_mostly = ~0; -bool amd_iommu_v2_present __read_mostly; static bool amd_iommu_pc_present __read_mostly; bool amdr_ivrs_remap_support __read_mostly; @@ -2101,12 +2100,6 @@ static int __init iommu_init_pci(struct amd_iommu *iommu) amd_iommu_max_glx_val = min(amd_iommu_max_glx_val, glxval); } - if (check_feature(FEATURE_GT) && - check_feature(FEATURE_PPR)) { - iommu->is_iommu_v2 = true; - amd_iommu_v2_present = true; - } - if (check_feature(FEATURE_PPR) && alloc_ppr_log(iommu)) return -ENOMEM; @@ -3676,7 +3669,7 @@ bool amd_iommu_v2_supported(void) * (i.e. EFR[SNPSup]=1), IOMMUv2 page table cannot be used without * setting up IOMMUv1 page table. */ - return amd_iommu_v2_present && !amd_iommu_snp_en; + return amd_iommu_gt_ppr_supported() && !amd_iommu_snp_en; } EXPORT_SYMBOL(amd_iommu_v2_supported); diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 6b9c4a9ef150..126f58784829 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -397,7 +397,7 @@ static int iommu_init_device(struct amd_iommu *iommu, struct device *dev) */ if ((iommu_default_passthrough() || !amd_iommu_force_isolation) && dev_is_pci(dev) && pci_iommuv2_capable(to_pci_dev(dev))) { - dev_data->iommu_v2 = iommu->is_iommu_v2; + dev_data->iommu_v2 = amd_iommu_gt_ppr_supported(); } dev_iommu_priv_set(dev, dev_data); -- cgit v1.2.3