| commit | ffb9a77d0a7fe47044795748eabcc8c68f65c0bc | [log] [tgz] |
|---|---|---|
| author | Catalin Marinas <[email protected]> | Tue Mar 09 12:26:01 2021 +0000 |
| committer | Greg Kroah-Hartman <[email protected]> | Wed Mar 17 17:06:28 2021 +0100 |
| tree | da56c0369b61a20f9a0285c3590f6e84a8047bf4 | |
| parent | d73665b4a9f6424bb48837fe0b7aae8cef8a990b [diff] |
arm64: mte: Map hotplugged memory as Normal Tagged commit d15dfd31384ba3cb93150e5f87661a76fa419f74 upstream. In a system supporting MTE, the linear map must allow reading/writing allocation tags by setting the memory type as Normal Tagged. Currently, this is only handled for memory present at boot. Hotplugged memory uses Normal non-Tagged memory. Introduce pgprot_mhp() for hotplugged memory and use it in add_memory_resource(). The arm64 code maps pgprot_mhp() to pgprot_tagged(). Note that ZONE_DEVICE memory should not be mapped as Tagged and therefore setting the memory type in arch_add_memory() is not feasible. Signed-off-by: Catalin Marinas <[email protected]> Fixes: 0178dc761368 ("arm64: mte: Use Normal Tagged attributes for the linear map") Reported-by: Patrick Daly <[email protected]> Tested-by: Patrick Daly <[email protected]> Link: https://lore.kernel.org/r/[email protected] Cc: <[email protected]> # 5.10.x Cc: Will Deacon <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Vincenzo Frascino <[email protected]> Cc: David Hildenbrand <[email protected]> Reviewed-by: David Hildenbrand <[email protected]> Reviewed-by: Vincenzo Frascino <[email protected]> Reviewed-by: Anshuman Khandual <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>