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path: root/drivers/iommu/io-pgtable-arm.c
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Diffstat (limited to 'drivers/iommu/io-pgtable-arm.c')
-rw-r--r--drivers/iommu/io-pgtable-arm.c203
1 files changed, 0 insertions, 203 deletions
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index 7e8e2216c294..e6626004b323 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -12,8 +12,6 @@
#include <linux/atomic.h>
#include <linux/bitops.h>
#include <linux/io-pgtable.h>
-#include <linux/kernel.h>
-#include <linux/device/faux.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include <linux/types.h>
@@ -1267,204 +1265,3 @@ struct io_pgtable_init_fns io_pgtable_arm_mali_lpae_init_fns = {
.alloc = arm_mali_lpae_alloc_pgtable,
.free = arm_lpae_free_pgtable,
};
-
-#ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE_SELFTEST
-
-static struct io_pgtable_cfg *cfg_cookie __initdata;
-
-static void __init dummy_tlb_flush_all(void *cookie)
-{
- WARN_ON(cookie != cfg_cookie);
-}
-
-static void __init dummy_tlb_flush(unsigned long iova, size_t size,
- size_t granule, void *cookie)
-{
- WARN_ON(cookie != cfg_cookie);
- WARN_ON(!(size & cfg_cookie->pgsize_bitmap));
-}
-
-static void __init dummy_tlb_add_page(struct iommu_iotlb_gather *gather,
- unsigned long iova, size_t granule,
- void *cookie)
-{
- dummy_tlb_flush(iova, granule, granule, cookie);
-}
-
-static const struct iommu_flush_ops dummy_tlb_ops __initconst = {
- .tlb_flush_all = dummy_tlb_flush_all,
- .tlb_flush_walk = dummy_tlb_flush,
- .tlb_add_page = dummy_tlb_add_page,
-};
-
-static void __init arm_lpae_dump_ops(struct io_pgtable_ops *ops)
-{
- struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops);
- struct io_pgtable_cfg *cfg = &data->iop.cfg;
-
- pr_err("cfg: pgsize_bitmap 0x%lx, ias %u-bit\n",
- cfg->pgsize_bitmap, cfg->ias);
- pr_err("data: %d levels, 0x%zx pgd_size, %u pg_shift, %u bits_per_level, pgd @ %p\n",
- ARM_LPAE_MAX_LEVELS - data->start_level, ARM_LPAE_PGD_SIZE(data),
- ilog2(ARM_LPAE_GRANULE(data)), data->bits_per_level, data->pgd);
-}
-
-#define __FAIL(ops, i) ({ \
- WARN(1, "selftest: test failed for fmt idx %d\n", (i)); \
- arm_lpae_dump_ops(ops); \
- -EFAULT; \
-})
-
-static int __init arm_lpae_run_tests(struct io_pgtable_cfg *cfg)
-{
- static const enum io_pgtable_fmt fmts[] __initconst = {
- ARM_64_LPAE_S1,
- ARM_64_LPAE_S2,
- };
-
- int i, j;
- unsigned long iova;
- size_t size, mapped;
- struct io_pgtable_ops *ops;
-
- for (i = 0; i < ARRAY_SIZE(fmts); ++i) {
- cfg_cookie = cfg;
- ops = alloc_io_pgtable_ops(fmts[i], cfg, cfg);
- if (!ops) {
- pr_err("selftest: failed to allocate io pgtable ops\n");
- return -ENOMEM;
- }
-
- /*
- * Initial sanity checks.
- * Empty page tables shouldn't provide any translations.
- */
- if (ops->iova_to_phys(ops, 42))
- return __FAIL(ops, i);
-
- if (ops->iova_to_phys(ops, SZ_1G + 42))
- return __FAIL(ops, i);
-
- if (ops->iova_to_phys(ops, SZ_2G + 42))
- return __FAIL(ops, i);
-
- /*
- * Distinct mappings of different granule sizes.
- */
- iova = 0;
- for_each_set_bit(j, &cfg->pgsize_bitmap, BITS_PER_LONG) {
- size = 1UL << j;
-
- if (ops->map_pages(ops, iova, iova, size, 1,
- IOMMU_READ | IOMMU_WRITE |
- IOMMU_NOEXEC | IOMMU_CACHE,
- GFP_KERNEL, &mapped))
- return __FAIL(ops, i);
-
- /* Overlapping mappings */
- if (!ops->map_pages(ops, iova, iova + size, size, 1,
- IOMMU_READ | IOMMU_NOEXEC,
- GFP_KERNEL, &mapped))
- return __FAIL(ops, i);
-
- if (ops->iova_to_phys(ops, iova + 42) != (iova + 42))
- return __FAIL(ops, i);
-
- iova += SZ_1G;
- }
-
- /* Full unmap */
- iova = 0;
- for_each_set_bit(j, &cfg->pgsize_bitmap, BITS_PER_LONG) {
- size = 1UL << j;
-
- if (ops->unmap_pages(ops, iova, size, 1, NULL) != size)
- return __FAIL(ops, i);
-
- if (ops->iova_to_phys(ops, iova + 42))
- return __FAIL(ops, i);
-
- /* Remap full block */
- if (ops->map_pages(ops, iova, iova, size, 1,
- IOMMU_WRITE, GFP_KERNEL, &mapped))
- return __FAIL(ops, i);
-
- if (ops->iova_to_phys(ops, iova + 42) != (iova + 42))
- return __FAIL(ops, i);
-
- iova += SZ_1G;
- }
-
- /*
- * Map/unmap the last largest supported page of the IAS, this can
- * trigger corner cases in the concatednated page tables.
- */
- mapped = 0;
- size = 1UL << __fls(cfg->pgsize_bitmap);
- iova = (1UL << cfg->ias) - size;
- if (ops->map_pages(ops, iova, iova, size, 1,
- IOMMU_READ | IOMMU_WRITE |
- IOMMU_NOEXEC | IOMMU_CACHE,
- GFP_KERNEL, &mapped))
- return __FAIL(ops, i);
- if (mapped != size)
- return __FAIL(ops, i);
- if (ops->unmap_pages(ops, iova, size, 1, NULL) != size)
- return __FAIL(ops, i);
-
- free_io_pgtable_ops(ops);
- }
-
- return 0;
-}
-
-static int __init arm_lpae_do_selftests(void)
-{
- static const unsigned long pgsize[] __initconst = {
- SZ_4K | SZ_2M | SZ_1G,
- SZ_16K | SZ_32M,
- SZ_64K | SZ_512M,
- };
-
- static const unsigned int address_size[] __initconst = {
- 32, 36, 40, 42, 44, 48,
- };
-
- int i, j, k, pass = 0, fail = 0;
- struct faux_device *dev;
- struct io_pgtable_cfg cfg = {
- .tlb = &dummy_tlb_ops,
- .coherent_walk = true,
- .quirks = IO_PGTABLE_QUIRK_NO_WARN,
- };
-
- dev = faux_device_create("io-pgtable-test", NULL, 0);
- if (!dev)
- return -ENOMEM;
-
- cfg.iommu_dev = &dev->dev;
-
- for (i = 0; i < ARRAY_SIZE(pgsize); ++i) {
- for (j = 0; j < ARRAY_SIZE(address_size); ++j) {
- /* Don't use ias > oas as it is not valid for stage-2. */
- for (k = 0; k <= j; ++k) {
- cfg.pgsize_bitmap = pgsize[i];
- cfg.ias = address_size[k];
- cfg.oas = address_size[j];
- pr_info("selftest: pgsize_bitmap 0x%08lx, IAS %u OAS %u\n",
- pgsize[i], cfg.ias, cfg.oas);
- if (arm_lpae_run_tests(&cfg))
- fail++;
- else
- pass++;
- }
- }
- }
-
- pr_info("selftest: completed with %d PASS %d FAIL\n", pass, fail);
- faux_device_destroy(dev);
-
- return fail ? -EFAULT : 0;
-}
-subsys_initcall(arm_lpae_do_selftests);
-#endif
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