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| author | Robert Richter <rrichter@amd.com> | 2024-05-02 16:10:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-30 10:49:22 +0300 |
| commit | d0c847f4bccda1401e154c4e184a8a5eb90b8d90 (patch) | |
| tree | ca48ea778e5cb088489e25deee0fb8e8632d1b95 /include | |
| parent | 17f3318d785fd00457928ce1005a1d72ccc62404 (diff) | |
| download | linux-d0c847f4bccda1401e154c4e184a8a5eb90b8d90.tar.xz | |
x86/numa: Fix SRAT lookup of CFMWS ranges with numa_fill_memblks()
[ Upstream commit f9f67e5adc8dc2e1cc51ab2d3d6382fa97f074d4 ]
For configurations that have the kconfig option NUMA_KEEP_MEMINFO
disabled, numa_fill_memblks() only returns with NUMA_NO_MEMBLK (-1).
SRAT lookup fails then because an existing SRAT memory range cannot be
found for a CFMWS address range. This causes the addition of a
duplicate numa_memblk with a different node id and a subsequent page
fault and kernel crash during boot.
Fix this by making numa_fill_memblks() always available regardless of
NUMA_KEEP_MEMINFO.
As Dan suggested, the fix is implemented to remove numa_fill_memblks()
from sparsemem.h and alos using __weak for the function.
Note that the issue was initially introduced with [1]. But since
phys_to_target_node() was originally used that returned the valid node
0, an additional numa_memblk was not added. Though, the node id was
wrong too, a message is seen then in the logs:
kernel/numa.c: pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n",
[1] commit fd49f99c1809 ("ACPI: NUMA: Add a node and memblk for each
CFMWS not in SRAT")
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/all/66271b0072317_69102944c@dwillia2-xfh.jf.intel.com.notmuch/
Fixes: 8f1004679987 ("ACPI/NUMA: Apply SRAT proximity domain to entire CFMWS window")
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Robert Richter <rrichter@amd.com>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/numa.h | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/include/linux/numa.h b/include/linux/numa.h index 915033a75731..1d43371fafd2 100644 --- a/include/linux/numa.h +++ b/include/linux/numa.h @@ -36,12 +36,7 @@ int memory_add_physaddr_to_nid(u64 start); int phys_to_target_node(u64 start); #endif -#ifndef numa_fill_memblks -static inline int __init numa_fill_memblks(u64 start, u64 end) -{ - return NUMA_NO_MEMBLK; -} -#endif +int numa_fill_memblks(u64 start, u64 end); #else /* !CONFIG_NUMA */ static inline int numa_nearest_node(int node, unsigned int state) |