diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2025-05-27 16:34:51 +0100 |
|---|---|---|
| committer | Dave Jiang <dave.jiang@intel.com> | 2025-06-30 16:36:06 -0700 |
| commit | 60da1f685a94bc9bd94caf46d953cfa43468c29e (patch) | |
| tree | f7976fe7bcc6085ea8a7a4bb06e427e781c33378 | |
| parent | 38b502e0a65215ddefaf84b672ec3908af97bacf (diff) | |
cxl_test: Limit location for fake CFMWS to mappable range
Some architectures (e.g. arm64) only support memory hotplug operations on
a restricted set of physical addresses. This applies even when we are
faking some CXL fixed memory windows for the purposes of cxl_test.
That range can be queried with mhp_get_pluggable_range(true). Use the
minimum of that the top of that range and iomem_resource.end to establish
the 64GiB region used by cxl_test.
From thread #2 which was related to the issue in #1.
[ dj: Add CONFIG_MEMORY_HOTPLUG config check, from Alison ]
Link: https://lore.kernel.org/linux-cxl/20250522145622.00002633@huawei.com/ #2
Reported-by: Itaru Kitayama <itaru.kitayama@linux.dev>
Closes: https://github.com/pmem/ndctl/issues/278 #1
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Itaru Kitayama <itaru.kitayama@fujitsu.com <mailto:itaru.kitayama@fujitsu.com>
Tested-by: Marc Herbert <marc.herbert@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://patch.msgid.link/20250527153451.82858-1-Jonathan.Cameron@huawei.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
| -rw-r--r-- | tools/testing/cxl/config_check.c | 1 | ||||
| -rw-r--r-- | tools/testing/cxl/test/cxl.c | 7 |
2 files changed, 7 insertions, 1 deletions
diff --git a/tools/testing/cxl/config_check.c b/tools/testing/cxl/config_check.c index 0902c5d6e410..a80bc2c062fe 100644 --- a/tools/testing/cxl/config_check.c +++ b/tools/testing/cxl/config_check.c @@ -14,4 +14,5 @@ void check(void) BUILD_BUG_ON(!IS_ENABLED(CONFIG_CXL_REGION_INVALIDATION_TEST)); BUILD_BUG_ON(!IS_ENABLED(CONFIG_NVDIMM_SECURITY_TEST)); BUILD_BUG_ON(!IS_ENABLED(CONFIG_DEBUG_FS)); + BUILD_BUG_ON(!IS_ENABLED(CONFIG_MEMORY_HOTPLUG)); } diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c index 8a5815ca870d..6a25cca5636f 100644 --- a/tools/testing/cxl/test/cxl.c +++ b/tools/testing/cxl/test/cxl.c @@ -2,6 +2,7 @@ // Copyright(c) 2021 Intel Corporation. All rights reserved. #include <linux/platform_device.h> +#include <linux/memory_hotplug.h> #include <linux/genalloc.h> #include <linux/module.h> #include <linux/mutex.h> @@ -1328,6 +1329,7 @@ err_mem: static __init int cxl_test_init(void) { int rc, i; + struct range mappable; cxl_acpi_test(); cxl_core_test(); @@ -1342,8 +1344,11 @@ static __init int cxl_test_init(void) rc = -ENOMEM; goto err_gen_pool_create; } + mappable = mhp_get_pluggable_range(true); - rc = gen_pool_add(cxl_mock_pool, iomem_resource.end + 1 - SZ_64G, + rc = gen_pool_add(cxl_mock_pool, + min(iomem_resource.end + 1 - SZ_64G, + mappable.end + 1 - SZ_64G), SZ_64G, NUMA_NO_NODE); if (rc) goto err_gen_pool_add; |