// SPDX-License-Identifier: GPL-2.0-only /* * CPU-agnostic ARM page table allocator. * * Copyright (C) 2014 ARM Limited * * Author: Will Deacon <[email protected]> */ #define pr_fmt(fmt) … #include <linux/atomic.h> #include <linux/bitops.h> #include <linux/io-pgtable.h> #include <linux/kernel.h> #include <linux/sizes.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/dma-mapping.h> #include <asm/barrier.h> #include "io-pgtable-arm.h" #include "iommu-pages.h" #define ARM_LPAE_MAX_ADDR_BITS … #define ARM_LPAE_S2_MAX_CONCAT_PAGES … #define ARM_LPAE_MAX_LEVELS … /* Struct accessors */ #define io_pgtable_to_data(x) … #define io_pgtable_ops_to_data(x) … /* * Calculate the right shift amount to get to the portion describing level l * in a virtual address mapped by the pagetable in d. */ #define ARM_LPAE_LVL_SHIFT(l,d) … #define ARM_LPAE_GRANULE(d) … #define ARM_LPAE_PGD_SIZE(d) … #define ARM_LPAE_PTES_PER_TABLE(d) … /* * Calculate the index at level l used to map virtual address a using the * pagetable in d. */ #define ARM_LPAE_PGD_IDX(l,d) … #define ARM_LPAE_LVL_IDX(a,l,d) … /* Calculate the block/page mapping size at level l for pagetable in d. */ #define ARM_LPAE_BLOCK_SIZE(l,d) … /* Page table bits */ #define ARM_LPAE_PTE_TYPE_SHIFT … #define ARM_LPAE_PTE_TYPE_MASK … #define ARM_LPAE_PTE_TYPE_BLOCK … #define ARM_LPAE_PTE_TYPE_TABLE … #define ARM_LPAE_PTE_TYPE_PAGE … #define ARM_LPAE_PTE_ADDR_MASK … #define ARM_LPAE_PTE_NSTABLE … #define ARM_LPAE_PTE_XN … #define ARM_LPAE_PTE_DBM … #define ARM_LPAE_PTE_AF … #define ARM_LPAE_PTE_SH_NS … #define ARM_LPAE_PTE_SH_OS … #define ARM_LPAE_PTE_SH_IS … #define ARM_LPAE_PTE_NS … #define ARM_LPAE_PTE_VALID … #define ARM_LPAE_PTE_ATTR_LO_MASK … /* Ignore the contiguous bit for block splitting */ #define ARM_LPAE_PTE_ATTR_HI_MASK … #define ARM_LPAE_PTE_ATTR_MASK … /* Software bit for solving coherency races */ #define ARM_LPAE_PTE_SW_SYNC … /* Stage-1 PTE */ #define ARM_LPAE_PTE_AP_UNPRIV … #define ARM_LPAE_PTE_AP_RDONLY_BIT … #define ARM_LPAE_PTE_AP_RDONLY … #define ARM_LPAE_PTE_AP_WR_CLEAN_MASK … #define ARM_LPAE_PTE_ATTRINDX_SHIFT … #define ARM_LPAE_PTE_nG … /* Stage-2 PTE */ #define ARM_LPAE_PTE_HAP_FAULT … #define ARM_LPAE_PTE_HAP_READ … #define ARM_LPAE_PTE_HAP_WRITE … #define ARM_LPAE_PTE_MEMATTR_OIWB … #define ARM_LPAE_PTE_MEMATTR_NC … #define ARM_LPAE_PTE_MEMATTR_DEV … /* Register bits */ #define ARM_LPAE_VTCR_SL0_MASK … #define ARM_LPAE_TCR_T0SZ_SHIFT … #define ARM_LPAE_VTCR_PS_SHIFT … #define ARM_LPAE_VTCR_PS_MASK … #define ARM_LPAE_MAIR_ATTR_SHIFT(n) … #define ARM_LPAE_MAIR_ATTR_MASK … #define ARM_LPAE_MAIR_ATTR_DEVICE … #define ARM_LPAE_MAIR_ATTR_NC … #define ARM_LPAE_MAIR_ATTR_INC_OWBRWA … #define ARM_LPAE_MAIR_ATTR_WBRWA … #define ARM_LPAE_MAIR_ATTR_IDX_NC … #define ARM_LPAE_MAIR_ATTR_IDX_CACHE … #define ARM_LPAE_MAIR_ATTR_IDX_DEV … #define ARM_LPAE_MAIR_ATTR_IDX_INC_OCACHE … #define ARM_MALI_LPAE_TTBR_ADRMODE_TABLE … #define ARM_MALI_LPAE_TTBR_READ_INNER … #define ARM_MALI_LPAE_TTBR_SHARE_OUTER … #define ARM_MALI_LPAE_MEMATTR_IMP_DEF … #define ARM_MALI_LPAE_MEMATTR_WRITE_ALLOC … /* IOPTE accessors */ #define iopte_deref(pte,d) … #define iopte_type(pte) … #define iopte_prot(pte) … #define iopte_writeable_dirty(pte) … #define iopte_set_writeable_clean(ptep) … struct arm_lpae_io_pgtable { … }; arm_lpae_iopte; static inline bool iopte_leaf(arm_lpae_iopte pte, int lvl, enum io_pgtable_fmt fmt) { … } static inline bool iopte_table(arm_lpae_iopte pte, int lvl) { … } static arm_lpae_iopte paddr_to_iopte(phys_addr_t paddr, struct arm_lpae_io_pgtable *data) { … } static phys_addr_t iopte_to_paddr(arm_lpae_iopte pte, struct arm_lpae_io_pgtable *data) { … } static bool selftest_running = …; static dma_addr_t __arm_lpae_dma_addr(void *pages) { … } static void *__arm_lpae_alloc_pages(size_t size, gfp_t gfp, struct io_pgtable_cfg *cfg, void *cookie) { … } static void __arm_lpae_free_pages(void *pages, size_t size, struct io_pgtable_cfg *cfg, void *cookie) { … } static void __arm_lpae_sync_pte(arm_lpae_iopte *ptep, int num_entries, struct io_pgtable_cfg *cfg) { … } static void __arm_lpae_clear_pte(arm_lpae_iopte *ptep, struct io_pgtable_cfg *cfg) { … } static size_t __arm_lpae_unmap(struct arm_lpae_io_pgtable *data, struct iommu_iotlb_gather *gather, unsigned long iova, size_t size, size_t pgcount, int lvl, arm_lpae_iopte *ptep); static void __arm_lpae_init_pte(struct arm_lpae_io_pgtable *data, phys_addr_t paddr, arm_lpae_iopte prot, int lvl, int num_entries, arm_lpae_iopte *ptep) { … } static int arm_lpae_init_pte(struct arm_lpae_io_pgtable *data, unsigned long iova, phys_addr_t paddr, arm_lpae_iopte prot, int lvl, int num_entries, arm_lpae_iopte *ptep) { … } static arm_lpae_iopte arm_lpae_install_table(arm_lpae_iopte *table, arm_lpae_iopte *ptep, arm_lpae_iopte curr, struct arm_lpae_io_pgtable *data) { … } static int __arm_lpae_map(struct arm_lpae_io_pgtable *data, unsigned long iova, phys_addr_t paddr, size_t size, size_t pgcount, arm_lpae_iopte prot, int lvl, arm_lpae_iopte *ptep, gfp_t gfp, size_t *mapped) { … } static arm_lpae_iopte arm_lpae_prot_to_pte(struct arm_lpae_io_pgtable *data, int prot) { … } static int arm_lpae_map_pages(struct io_pgtable_ops *ops, unsigned long iova, phys_addr_t paddr, size_t pgsize, size_t pgcount, int iommu_prot, gfp_t gfp, size_t *mapped) { … } static void __arm_lpae_free_pgtable(struct arm_lpae_io_pgtable *data, int lvl, arm_lpae_iopte *ptep) { … } static void arm_lpae_free_pgtable(struct io_pgtable *iop) { … } static size_t arm_lpae_split_blk_unmap(struct arm_lpae_io_pgtable *data, struct iommu_iotlb_gather *gather, unsigned long iova, size_t size, arm_lpae_iopte blk_pte, int lvl, arm_lpae_iopte *ptep, size_t pgcount) { … } static size_t __arm_lpae_unmap(struct arm_lpae_io_pgtable *data, struct iommu_iotlb_gather *gather, unsigned long iova, size_t size, size_t pgcount, int lvl, arm_lpae_iopte *ptep) { … } static size_t arm_lpae_unmap_pages(struct io_pgtable_ops *ops, unsigned long iova, size_t pgsize, size_t pgcount, struct iommu_iotlb_gather *gather) { … } static phys_addr_t arm_lpae_iova_to_phys(struct io_pgtable_ops *ops, unsigned long iova) { … } struct io_pgtable_walk_data { … }; static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, struct io_pgtable_walk_data *walk_data, arm_lpae_iopte *ptep, int lvl); static int io_pgtable_visit_dirty(struct arm_lpae_io_pgtable *data, struct io_pgtable_walk_data *walk_data, arm_lpae_iopte *ptep, int lvl) { … } static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, struct io_pgtable_walk_data *walk_data, arm_lpae_iopte *ptep, int lvl) { … } static int arm_lpae_read_and_clear_dirty(struct io_pgtable_ops *ops, unsigned long iova, size_t size, unsigned long flags, struct iommu_dirty_bitmap *dirty) { … } static void arm_lpae_restrict_pgsizes(struct io_pgtable_cfg *cfg) { … } static struct arm_lpae_io_pgtable * arm_lpae_alloc_pgtable(struct io_pgtable_cfg *cfg) { … } static struct io_pgtable * arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie) { … } static struct io_pgtable * arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie) { … } static struct io_pgtable * arm_32_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie) { … } static struct io_pgtable * arm_32_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie) { … } static struct io_pgtable * arm_mali_lpae_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie) { … } struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s1_init_fns = …; struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s2_init_fns = …; struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s1_init_fns = …; struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s2_init_fns = …; struct io_pgtable_init_fns io_pgtable_arm_mali_lpae_init_fns = …; #ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE_SELFTEST static struct io_pgtable_cfg *cfg_cookie __initdata; static void __init dummy_tlb_flush_all(void *cookie) { … } static void __init dummy_tlb_flush(unsigned long iova, size_t size, size_t granule, void *cookie) { … } static void __init dummy_tlb_add_page(struct iommu_iotlb_gather *gather, unsigned long iova, size_t granule, void *cookie) { … } static const struct iommu_flush_ops dummy_tlb_ops __initconst = …; static void __init arm_lpae_dump_ops(struct io_pgtable_ops *ops) { … } #define __FAIL(ops, i) … static int __init arm_lpae_run_tests(struct io_pgtable_cfg *cfg) { … } static int __init arm_lpae_do_selftests(void) { … } subsys_initcall(arm_lpae_do_selftests); #endif
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