Messages in this thread Patch in this message | | | From | Lu Baolu <> | Subject | [PATCH 5/6] iommu/vt-d: Cleanup after delegating DMA domain to generic iommu | Date | Sun, 9 Jun 2019 10:38:02 +0800 |
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From: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
[No functional changes]
1. Starting with commit df4f3c603aeb ("iommu/vt-d: Remove static identity map code") there are no callers for iommu_prepare_rmrr_dev() but the implementation of the function still exists, so remove it. Also, as a ripple effect remove get_domain_for_dev() and iommu_prepare_identity_map() because they aren't being used either.
2. init_dmars() runs the same loop (for_each_active_iommu(iommu, drhd)) over different functions back to back. So, remove the duplicate loop to make it a single for_each_active_iommu().
3. Cleanup few double spaces.
Cc: Joerg Roedel <joro@8bytes.org> Cc: Ashok Raj <ashok.raj@intel.com> Cc: Lu Baolu <baolu.lu@linux.intel.com> Cc: Sohil Mehta <sohil.mehta@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com> --- drivers/iommu/intel-iommu.c | 68 ++++--------------------------------- 1 file changed, 6 insertions(+), 62 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index d1cd7e449161..d60cf0fd9500 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -909,7 +909,6 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, return pte; } - /* return address's pte at specific level */ static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain, unsigned long pfn, @@ -1578,7 +1577,6 @@ static void iommu_disable_translation(struct intel_iommu *iommu) raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } - static int iommu_init_domains(struct intel_iommu *iommu) { u32 ndomains, nlongs; @@ -1616,8 +1614,6 @@ static int iommu_init_domains(struct intel_iommu *iommu) return -ENOMEM; } - - /* * If Caching mode is set, then invalid translations are tagged * with domain-id 0, hence we need to pre-allocate it. We also @@ -2649,29 +2645,6 @@ static struct dmar_domain *set_domain_for_dev(struct device *dev, return domain; } -static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw) -{ - struct dmar_domain *domain, *tmp; - - domain = find_domain(dev); - if (domain) - goto out; - - domain = find_or_alloc_domain(dev, gaw); - if (!domain) - goto out; - - tmp = set_domain_for_dev(dev, domain); - if (!tmp || domain != tmp) { - domain_exit(domain); - domain = tmp; - } - -out: - - return domain; -} - static int iommu_domain_identity_map(struct dmar_domain *domain, unsigned long long start, unsigned long long end) @@ -2736,33 +2709,6 @@ static int domain_prepare_identity_map(struct device *dev, return iommu_domain_identity_map(domain, start, end); } -static int iommu_prepare_identity_map(struct device *dev, - unsigned long long start, - unsigned long long end) -{ - struct dmar_domain *domain; - int ret; - - domain = get_domain_for_dev(dev, DEFAULT_DOMAIN_ADDRESS_WIDTH); - if (!domain) - return -ENOMEM; - - ret = domain_prepare_identity_map(dev, domain, start, end); - if (ret) - domain_exit(domain); - - return ret; -} - -static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, - struct device *dev) -{ - if (dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) - return 0; - return iommu_prepare_identity_map(dev, rmrr->base_address, - rmrr->end_address); -} - static int md_domain_init(struct dmar_domain *domain, int guest_width); static int __init si_domain_init(int hw) @@ -3306,14 +3252,13 @@ static int __init init_dmars(void) if (pasid_supported(iommu)) intel_svm_init(iommu); #endif - } - /* - * Now that qi is enabled on all iommus, set the root entry and flush - * caches. This is required on some Intel X58 chipsets, otherwise the - * flush_context function will loop forever and the boot hangs. - */ - for_each_active_iommu(iommu, drhd) { + /* + * Now that qi is enabled on all iommus, set the root entry and + * flush caches. This is required on some Intel X58 chipsets, + * otherwise the flush_context function will loop forever and + * the boot hangs. + */ iommu_flush_write_buffer(iommu); iommu_set_root_entry(iommu); iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); @@ -4058,7 +4003,6 @@ static void __init init_iommu_pm_ops(void) static inline void init_iommu_pm_ops(void) {} #endif /* CONFIG_PM */ - int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg) { struct acpi_dmar_reserved_memory *rmrr; -- 2.17.1
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