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ACPI: NFIT: Use fallback node id when numa info in NFIT table is incorrect

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When ACPI NFIT table is failing to populate correct numa information
on arm64, dax_kmem will get NUMA_NO_NODE from the NFIT driver.

Without this patch, pmem can't be probed as RAM devices on arm64 guest:
  $ndctl create-namespace -fe namespace0.0 --mode=devdax --map=dev -s 1g -a 128M
  kmem dax0.0: rejecting DAX region [mem 0x240400000-0x2bfffffff] with invalid node: -1
  kmem: probe of dax0.0 failed with error -22

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jia He <justin.he@arm.com>
Cc: <stable@vger.kernel.org>
Fixes: c221c0b030 ("device-dax: "Hotplug" persistent memory for use like normal RAM")
Link: https://lore.kernel.org/r/20210922152919.6940-1-justin.he@arm.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Jia He 2021-09-22 23:29:19 +08:00 committed by Dan Williams
parent 5816b3e657
commit f060db9937
1 changed files with 12 additions and 0 deletions
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12
drivers/acpi/nfit/core.c
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@ -3007,6 +3007,18 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
ndr_desc->target_node = NUMA_NO_NODE;
}
/* Fallback to address based numa information if node lookup failed */
if (ndr_desc->numa_node == NUMA_NO_NODE) {
ndr_desc->numa_node = memory_add_physaddr_to_nid(spa->address);
dev_info(acpi_desc->dev, "changing numa node from %d to %d for nfit region [%pa-%pa]",
NUMA_NO_NODE, ndr_desc->numa_node, &res.start, &res.end);
}
if (ndr_desc->target_node == NUMA_NO_NODE) {
ndr_desc->target_node = phys_to_target_node(spa->address);
dev_info(acpi_desc->dev, "changing target node from %d to %d for nfit region [%pa-%pa]",
NUMA_NO_NODE, ndr_desc->numa_node, &res.start, &res.end);
}
/*
* Persistence domain bits are hierarchical, if
* ACPI_NFIT_CAPABILITY_CACHE_FLUSH is set then