diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0625-arm64-mm-reserve-CMA-and-crashkernel-in-ZONE_DMA32.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0625-arm64-mm-reserve-CMA-and-crashkernel-in-ZONE_DMA32.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0625-arm64-mm-reserve-CMA-and-crashkernel-in-ZONE_DMA32.patch b/target/linux/bcm27xx/patches-5.4/950-0625-arm64-mm-reserve-CMA-and-crashkernel-in-ZONE_DMA32.patch new file mode 100644 index 0000000000..e1a340ec91 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0625-arm64-mm-reserve-CMA-and-crashkernel-in-ZONE_DMA32.patch @@ -0,0 +1,44 @@ +From d4cf092a0e923361f521e1bc7d1fbfb1907958b3 Mon Sep 17 00:00:00 2001 +From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> +Date: Thu, 7 Nov 2019 10:56:11 +0100 +Subject: [PATCH] arm64: mm: reserve CMA and crashkernel in ZONE_DMA32 + +commit bff3b04460a80f425442fe8e5c6ee8c3ebef611f upstream. + +With the introduction of ZONE_DMA in arm64 we moved the default CMA and +crashkernel reservation into that area. This caused a regression on big +machines that need big CMA and crashkernel reservations. Note that +ZONE_DMA is only 1GB big. + +Restore the previous behavior as the wide majority of devices are OK +with reserving these in ZONE_DMA32. The ones that need them in ZONE_DMA +will configure it explicitly. + +Fixes: 1a8e1cef7603 ("arm64: use both ZONE_DMA and ZONE_DMA32") +Reported-by: Qian Cai <cai@lca.pw> +Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> +Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> +--- + arch/arm64/mm/init.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +--- a/arch/arm64/mm/init.c ++++ b/arch/arm64/mm/init.c +@@ -85,7 +85,7 @@ static void __init reserve_crashkernel(v + + if (crash_base == 0) { + /* Current arm64 boot protocol requires 2MB alignment */ +- crash_base = memblock_find_in_range(0, ARCH_LOW_ADDRESS_LIMIT, ++ crash_base = memblock_find_in_range(0, arm64_dma32_phys_limit, + crash_size, SZ_2M); + if (crash_base == 0) { + pr_warn("cannot allocate crashkernel (size:0x%llx)\n", +@@ -449,7 +449,7 @@ void __init arm64_memblock_init(void) + + high_memory = __va(memblock_end_of_DRAM() - 1) + 1; + +- dma_contiguous_reserve(arm64_dma_phys_limit ? : arm64_dma32_phys_limit); ++ dma_contiguous_reserve(arm64_dma32_phys_limit); + } + + void __init bootmem_init(void) |