diff options
author | Alison Schofield <alison.schofield@intel.com> | 2023-04-19 06:26:33 +0300 |
---|---|---|
committer | Dan Williams <dan.j.williams@intel.com> | 2023-04-23 22:08:39 +0300 |
commit | 98980d76c3fc3d56b34e425eb102b10355ccc743 (patch) | |
tree | 3ceb586c609d5f43ce95e8d93ecba1b8b70f9c4f /tools/testing/cxl | |
parent | 8eac7ea72593010726713c5359a4b6aedf29b6fe (diff) | |
download | linux-98980d76c3fc3d56b34e425eb102b10355ccc743.tar.xz |
tools/testing/cxl: Add a sysfs attr to test poison inject limits
CXL devices may report a maximum number of addresses that a device
allows to be poisoned using poison injection. When cxl_test creates
mock CXL memory devices, it defaults to MOCK_INJECT_DEV_MAX==88 for
all mocked memdevs.
Add a sysfs attribute, poison_inject_max to module cxl_mock_mem so
that users can set a custom device injection limit. Fail, and return
-EBUSY, if the mock poison list is not empty.
/sys/bus/platform/drivers/cxl_mock_mem/poison_inject_max
A simple usage model is to set the attribute before running a test in
order to emulate a device's poison handling.
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/0f25b2862b90013545450222d2199e435c6cc11a.1681874357.git.alison.schofield@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'tools/testing/cxl')
-rw-r--r-- | tools/testing/cxl/test/mem.c | 52 |
1 files changed, 48 insertions, 4 deletions
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c index 8b053de23504..0fd7e7b8b44a 100644 --- a/tools/testing/cxl/test/mem.c +++ b/tools/testing/cxl/test/mem.c @@ -19,6 +19,8 @@ #define MOCK_INJECT_DEV_MAX 8 #define MOCK_INJECT_TEST_MAX 128 +static unsigned int poison_inject_dev_max = MOCK_INJECT_DEV_MAX; + static struct cxl_cel_entry mock_cel[] = { { .opcode = cpu_to_le16(CXL_MBOX_OP_GET_SUPPORTED_LOGS), @@ -485,7 +487,7 @@ static int mock_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) cpu_to_le64(SZ_256M / CXL_CAPACITY_MULTIPLIER), .total_capacity = cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER), - .inject_poison_limit = cpu_to_le16(MOCK_INJECT_DEV_MAX), + .inject_poison_limit = cpu_to_le16(MOCK_INJECT_TEST_MAX), }; put_unaligned_le24(CXL_POISON_LIST_MAX, id.poison_list_max_mer); @@ -919,7 +921,7 @@ cxl_get_injected_po(struct cxl_dev_state *cxlds, u64 offset, u64 length) int nr_records = 0; u64 dpa; - po = kzalloc(struct_size(po, record, MOCK_INJECT_DEV_MAX), GFP_KERNEL); + po = kzalloc(struct_size(po, record, poison_inject_dev_max), GFP_KERNEL); if (!po) return NULL; @@ -934,7 +936,7 @@ cxl_get_injected_po(struct cxl_dev_state *cxlds, u64 offset, u64 length) po->record[nr_records].address = cpu_to_le64(dpa); po->record[nr_records].length = cpu_to_le32(1); nr_records++; - if (nr_records == MOCK_INJECT_DEV_MAX) + if (nr_records == poison_inject_dev_max) break; } @@ -972,7 +974,7 @@ static bool mock_poison_dev_max_injected(struct cxl_dev_state *cxlds) if (mock_poison_list[i].cxlds == cxlds) count++; } - return (count >= MOCK_INJECT_DEV_MAX); + return (count >= poison_inject_dev_max); } static bool mock_poison_add(struct cxl_dev_state *cxlds, u64 dpa) @@ -1054,6 +1056,47 @@ static int mock_clear_poison(struct cxl_dev_state *cxlds, return 0; } +static bool mock_poison_list_empty(void) +{ + for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) { + if (mock_poison_list[i].cxlds) + return false; + } + return true; +} + +static ssize_t poison_inject_max_show(struct device_driver *drv, char *buf) +{ + return sysfs_emit(buf, "%u\n", poison_inject_dev_max); +} + +static ssize_t poison_inject_max_store(struct device_driver *drv, + const char *buf, size_t len) +{ + int val; + + if (kstrtoint(buf, 0, &val) < 0) + return -EINVAL; + + if (!mock_poison_list_empty()) + return -EBUSY; + + if (val <= MOCK_INJECT_TEST_MAX) + poison_inject_dev_max = val; + else + return -EINVAL; + + return len; +} + +static DRIVER_ATTR_RW(poison_inject_max); + +static struct attribute *cxl_mock_mem_core_attrs[] = { + &driver_attr_poison_inject_max.attr, + NULL +}; +ATTRIBUTE_GROUPS(cxl_mock_mem_core); + static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) { struct device *dev = cxlds->dev; @@ -1262,6 +1305,7 @@ static struct platform_driver cxl_mock_mem_driver = { .driver = { .name = KBUILD_MODNAME, .dev_groups = cxl_mock_mem_groups, + .groups = cxl_mock_mem_core_groups, }, }; |