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45 lines
1.7 KiB
Diff
45 lines
1.7 KiB
Diff
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From d4cf092a0e923361f521e1bc7d1fbfb1907958b3 Mon Sep 17 00:00:00 2001
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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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Date: Thu, 7 Nov 2019 10:56:11 +0100
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Subject: [PATCH] arm64: mm: reserve CMA and crashkernel in ZONE_DMA32
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commit bff3b04460a80f425442fe8e5c6ee8c3ebef611f upstream.
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With the introduction of ZONE_DMA in arm64 we moved the default CMA and
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crashkernel reservation into that area. This caused a regression on big
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machines that need big CMA and crashkernel reservations. Note that
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ZONE_DMA is only 1GB big.
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Restore the previous behavior as the wide majority of devices are OK
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with reserving these in ZONE_DMA32. The ones that need them in ZONE_DMA
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will configure it explicitly.
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Fixes: 1a8e1cef7603 ("arm64: use both ZONE_DMA and ZONE_DMA32")
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Reported-by: Qian Cai <cai@lca.pw>
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Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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---
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arch/arm64/mm/init.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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--- a/arch/arm64/mm/init.c
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+++ b/arch/arm64/mm/init.c
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@@ -91,7 +91,7 @@ static void __init reserve_crashkernel(v
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if (crash_base == 0) {
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/* Current arm64 boot protocol requires 2MB alignment */
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- crash_base = memblock_find_in_range(0, ARCH_LOW_ADDRESS_LIMIT,
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+ crash_base = memblock_find_in_range(0, arm64_dma32_phys_limit,
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crash_size, SZ_2M);
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if (crash_base == 0) {
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pr_warn("cannot allocate crashkernel (size:0x%llx)\n",
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@@ -459,7 +459,7 @@ void __init arm64_memblock_init(void)
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high_memory = __va(memblock_end_of_DRAM() - 1) + 1;
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- dma_contiguous_reserve(arm64_dma_phys_limit ? : arm64_dma32_phys_limit);
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+ dma_contiguous_reserve(arm64_dma32_phys_limit);
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}
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void __init bootmem_init(void)
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