Searched hist:"15122 ee2c515a253b0c66a3e618bc7ebe35105eb" (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/arch/arm64/mm/ |
| H A D | mmu.c | diff 15122ee2c515a253b0c66a3e618bc7ebe35105eb Wed Feb 21 06:59:27 CST 2018 Will Deacon <will.deacon@arm.com> arm64: Enforce BBM for huge IO/VMAP mappings
ioremap_page_range doesn't honour break-before-make and attempts to put
down huge mappings (using p*d_set_huge) over the top of pre-existing
table entries. This leads to us leaking page table memory and also gives
rise to TLB conflicts and spurious aborts, which have been seen in
practice on Cortex-A75.
Until this has been resolved, refuse to put block mappings when the
existing entry is found to be present.
Fixes: 324420bf91f60 ("arm64: add support for ioremap() block mappings")
Reported-by: Hanjun Guo <hanjun.guo@linaro.org>
Reported-by: Lei Li <lious.lilei@hisilicon.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
|