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| author |   Reiji Watanabe <reijiw@google.com> | 2021-12-05 16:47:35 -0800 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2021-12-06 17:02:10 +0000 |
| commit | f0616abd4e67143b45b04b565839148458857347 (patch) | |
| tree | d7a91f6f0b594dfe6aa6133300cd5fff29197688 /Documentation/arm64 | |
| parent | Linux 5.16-rc3 (diff) | |
| download | linux-dev-f0616abd4e67143b45b04b565839148458857347.tar.xz linux-dev-f0616abd4e67143b45b04b565839148458857347.zip | |
arm64: clear_page() shouldn't use DC ZVA when DCZID_EL0.DZP == 1
Currently, clear_page() uses DC ZVA instruction unconditionally. But it
should make sure that DCZID_EL0.DZP, which indicates whether or not use
of DC ZVA instruction is prohibited, is zero when using the instruction.
Use STNP instead when DCZID_EL0.DZP == 1.
Fixes: f27bb139c387 ("arm64: Miscellaneous library functions")
Signed-off-by: Reiji Watanabe <reijiw@google.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20211206004736.1520989-2-reijiw@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation/arm64')
0 files changed, 0 insertions, 0 deletions