diff options
author | Tom Murphy <murphyt7@tcd.ie> | 2020-05-16 09:21:01 +0300 |
---|---|---|
committer | Joerg Roedel <jroedel@suse.de> | 2020-05-18 16:37:26 +0300 |
commit | e70b081c6f376471d7a9fee69e12e8f05ac2925d (patch) | |
tree | 6a22f0dc7b973ae3a9a131606cf2e84768604c16 /drivers | |
parent | 7482fd59259a7f23e191c14b8a126a0f6981b3e4 (diff) | |
download | linux-e70b081c6f376471d7a9fee69e12e8f05ac2925d.tar.xz |
iommu/vt-d: Remove IOVA handling code from the non-dma_ops path
There's no need for the non-dma_ops path to keep track of IOVAs. The
whole point of the non-dma_ops path is that it allows the IOVAs to be
handled separately. The IOVA handling code removed in this patch is
pointless.
Signed-off-by: Tom Murphy <murphyt7@tcd.ie>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200516062101.29541-19-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/iommu/intel-iommu.c | 95 |
1 files changed, 32 insertions, 63 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 3c5cc3424e90..f75d7d9c231f 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -1892,11 +1892,6 @@ static int dmar_init_reserved_ranges(void) return 0; } -static void domain_reserve_special_ranges(struct dmar_domain *domain) -{ - copy_reserved_iova(&reserved_iova_list, &domain->iovad); -} - static inline int guestwidth_to_adjustwidth(int gaw) { int agaw; @@ -1918,7 +1913,8 @@ static void domain_exit(struct dmar_domain *domain) domain_remove_dev_info(domain); /* destroy iovas */ - put_iova_domain(&domain->iovad); + if (domain->domain.type == IOMMU_DOMAIN_DMA) + put_iova_domain(&domain->iovad); if (domain->pgd) { struct page *freelist; @@ -2627,19 +2623,9 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu, } static int iommu_domain_identity_map(struct dmar_domain *domain, - unsigned long long start, - unsigned long long end) + unsigned long first_vpfn, + unsigned long last_vpfn) { - unsigned long first_vpfn = start >> VTD_PAGE_SHIFT; - unsigned long last_vpfn = end >> VTD_PAGE_SHIFT; - - if (!reserve_iova(&domain->iovad, dma_to_mm_pfn(first_vpfn), - dma_to_mm_pfn(last_vpfn))) { - pr_err("Reserving iova failed\n"); - return -ENOMEM; - } - - pr_debug("Mapping reserved region %llx-%llx\n", start, end); /* * RMRR range might have overlap with physical memory range, * clear it first @@ -2677,7 +2663,8 @@ static int __init si_domain_init(int hw) for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) { ret = iommu_domain_identity_map(si_domain, - PFN_PHYS(start_pfn), PFN_PHYS(end_pfn)); + mm_to_dma_pfn(start_pfn), + mm_to_dma_pfn(end_pfn)); if (ret) return ret; } @@ -4547,58 +4534,37 @@ static int intel_iommu_memory_notifier(struct notifier_block *nb, unsigned long val, void *v) { struct memory_notify *mhp = v; - unsigned long long start, end; - unsigned long start_vpfn, last_vpfn; + unsigned long start_vpfn = mm_to_dma_pfn(mhp->start_pfn); + unsigned long last_vpfn = mm_to_dma_pfn(mhp->start_pfn + + mhp->nr_pages - 1); switch (val) { case MEM_GOING_ONLINE: - start = mhp->start_pfn << PAGE_SHIFT; - end = ((mhp->start_pfn + mhp->nr_pages) << PAGE_SHIFT) - 1; - if (iommu_domain_identity_map(si_domain, start, end)) { - pr_warn("Failed to build identity map for [%llx-%llx]\n", - start, end); + if (iommu_domain_identity_map(si_domain, + start_vpfn, last_vpfn)) { + pr_warn("Failed to build identity map for [%lx-%lx]\n", + start_vpfn, last_vpfn); return NOTIFY_BAD; } break; case MEM_OFFLINE: case MEM_CANCEL_ONLINE: - start_vpfn = mm_to_dma_pfn(mhp->start_pfn); - last_vpfn = mm_to_dma_pfn(mhp->start_pfn + mhp->nr_pages - 1); - while (start_vpfn <= last_vpfn) { - struct iova *iova; + { struct dmar_drhd_unit *drhd; struct intel_iommu *iommu; struct page *freelist; - iova = find_iova(&si_domain->iovad, start_vpfn); - if (iova == NULL) { - pr_debug("Failed get IOVA for PFN %lx\n", - start_vpfn); - break; - } - - iova = split_and_remove_iova(&si_domain->iovad, iova, - start_vpfn, last_vpfn); - if (iova == NULL) { - pr_warn("Failed to split IOVA PFN [%lx-%lx]\n", - start_vpfn, last_vpfn); - return NOTIFY_BAD; - } - - freelist = domain_unmap(si_domain, iova->pfn_lo, - iova->pfn_hi); + freelist = domain_unmap(si_domain, + start_vpfn, last_vpfn); rcu_read_lock(); for_each_active_iommu(iommu, drhd) iommu_flush_iotlb_psi(iommu, si_domain, - iova->pfn_lo, iova_size(iova), + start_vpfn, mhp->nr_pages, !freelist, 0); rcu_read_unlock(); dma_free_pagelist(freelist); - - start_vpfn = iova->pfn_hi + 1; - free_iova_mem(iova); } break; } @@ -4626,8 +4592,9 @@ static void free_all_cpu_cached_iovas(unsigned int cpu) for (did = 0; did < cap_ndoms(iommu->cap); did++) { domain = get_iommu_domain(iommu, (u16)did); - if (!domain) + if (!domain || domain->domain.type != IOMMU_DOMAIN_DMA) continue; + free_cpu_cached_iovas(cpu, &domain->iovad); } } @@ -5037,9 +5004,6 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width) { int adjust_width; - init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN); - domain_reserve_special_ranges(domain); - /* calculate AGAW */ domain->gaw = guest_width; adjust_width = guestwidth_to_adjustwidth(guest_width); @@ -5058,11 +5022,21 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width) return 0; } +static void intel_init_iova_domain(struct dmar_domain *dmar_domain) +{ + init_iova_domain(&dmar_domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN); + copy_reserved_iova(&reserved_iova_list, &dmar_domain->iovad); + + if (!intel_iommu_strict && + init_iova_flush_queue(&dmar_domain->iovad, + iommu_flush_iova, iova_entry_free)) + pr_info("iova flush queue initialization failed\n"); +} + static struct iommu_domain *intel_iommu_domain_alloc(unsigned type) { struct dmar_domain *dmar_domain; struct iommu_domain *domain; - int ret; switch (type) { case IOMMU_DOMAIN_DMA: @@ -5079,13 +5053,8 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type) return NULL; } - if (!intel_iommu_strict && type == IOMMU_DOMAIN_DMA) { - ret = init_iova_flush_queue(&dmar_domain->iovad, - iommu_flush_iova, - iova_entry_free); - if (ret) - pr_info("iova flush queue initialization failed\n"); - } + if (type == IOMMU_DOMAIN_DMA) + intel_init_iova_domain(dmar_domain); domain_update_iommu_cap(dmar_domain); |