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60da1f685a
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>
18 lines
564 B
C
18 lines
564 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bug.h>
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void check(void)
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{
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/*
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* These kconfig symbols must be set to "m" for cxl_test to load
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* and operate.
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*/
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BUILD_BUG_ON(!IS_ENABLED(CONFIG_64BIT));
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BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_BUS));
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BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_ACPI));
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BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_PMEM));
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BUILD_BUG_ON(!IS_ENABLED(CONFIG_CXL_REGION_INVALIDATION_TEST));
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BUILD_BUG_ON(!IS_ENABLED(CONFIG_NVDIMM_SECURITY_TEST));
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BUILD_BUG_ON(!IS_ENABLED(CONFIG_DEBUG_FS));
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BUILD_BUG_ON(!IS_ENABLED(CONFIG_MEMORY_HOTPLUG));
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}
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