diff options
| author | Sudarshan Rajagopalan <[email protected]> | 2021-09-28 11:51:49 -0700 |
|---|---|---|
| committer | Will Deacon <[email protected]> | 2021-09-29 17:11:06 +0100 |
| commit | 8fac67ca236b961b573355e203dbaf62a706a2e5 (patch) | |
| tree | 60e2299d207de1a58a6f6cf9c298553626b3f549 | |
| parent | f8b46c4b51ab109457770e662bb3d0cde390879f (diff) | |
arm64: mm: update max_pfn after memory hotplug
After new memory blocks have been hotplugged, max_pfn and max_low_pfn
needs updating to reflect on new PFNs being hot added to system.
Without this patch, debug-related functions that use max_pfn such as
get_max_dump_pfn() or read_page_owner() will not work with any page in
memory that is hot-added after boot.
Fixes: 4ab215061554 ("arm64: Add memory hotplug support")
Signed-off-by: Sudarshan Rajagopalan <[email protected]>
Signed-off-by: Chris Goldsworthy <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: Georgi Djakov <[email protected]>
Tested-by: Georgi Djakov <[email protected]>
Link: https://lore.kernel.org/r/a51a27ee7be66024b5ce626310d673f24107bcb8.1632853776.git.quic_cgoldswo@quicinc.com
Signed-off-by: Will Deacon <[email protected]>
| -rw-r--r-- | arch/arm64/mm/mmu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index cfd9deb347c3..fd85b51b9d50 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1499,6 +1499,11 @@ int arch_add_memory(int nid, u64 start, u64 size, if (ret) __remove_pgd_mapping(swapper_pg_dir, __phys_to_virt(start), size); + else { + max_pfn = PFN_UP(start + size); + max_low_pfn = max_pfn; + } + return ret; } |