diff options
| author | Sudarshan Rajagopalan <quic_sudaraja@quicinc.com> | 2021-09-28 11:51:49 -0700 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-09-29 17:11:06 +0100 |
| commit | 8fac67ca236b961b573355e203dbaf62a706a2e5 (patch) | |
| tree | 60e2299d207de1a58a6f6cf9c298553626b3f549 /arch/arm64/mm | |
| parent | f8b46c4b51ab109457770e662bb3d0cde390879f (diff) | |
| download | linux-8fac67ca236b961b573355e203dbaf62a706a2e5.tar.bz2 | |
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 <quic_sudaraja@quicinc.com>
Signed-off-by: Chris Goldsworthy <quic_cgoldswo@quicinc.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Georgi Djakov <quic_c_gdjako@quicinc.com>
Tested-by: Georgi Djakov <quic_c_gdjako@quicinc.com>
Link: https://lore.kernel.org/r/a51a27ee7be66024b5ce626310d673f24107bcb8.1632853776.git.quic_cgoldswo@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/mm')
| -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; } |