From: Jia He <justin.he@arm.com>
To: Dan Williams <dan.j.williams@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Ira Weiny <ira.weiny@intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>,
nvdimm@lists.linux.dev, linux-acpi@vger.kernel.org,
Jia He <justin.he@arm.com>
Subject: [PATCH] ACPI: NFIT: Use fallback node id when numa info in NFIT table is incorrect
Date: Wed, 22 Sep 2021 23:29:19 +0800 [thread overview]
Message-ID: <20210922152919.6940-1-justin.he@arm.com> (raw)
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>
---
drivers/acpi/nfit/core.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index a3ef6cce644c..7dd80acf92c7 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -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
--
2.17.1
next reply other threads:[~2021-09-22 15:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-22 15:29 Jia He [this message]
2021-09-22 18:02 ` [PATCH] ACPI: NFIT: Use fallback node id when numa info in NFIT table is incorrect Dan Williams
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