[v7,1/7] arm64: mm: Move reserve_crashkernel() into mem_init()
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Message ID 20201119175400.9995-2-nsaenzjulienne@suse.de
State Accepted
Commit 0a30c53573b07d5561457e41fb0ab046cd857da5
Headers show
Series
  • arm64: Default to 32-bit wide ZONE_DMA
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Commit Message

Nicolas Saenz Julienne Nov. 19, 2020, 5:53 p.m. UTC
crashkernel might reserve memory located in ZONE_DMA. We plan to delay
ZONE_DMA's initialization after unflattening the devicetree and ACPI's
boot table initialization, so move it later in the boot process.
Specifically into bootmem_init() since request_standard_resources()
depends on it.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Tested-by: Jeremy Linton <jeremy.linton@arm.com>

---

Changes since v6:
 - Move crashkernel reserve placement earlier, in bootmem_init()

 arch/arm64/mm/init.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

Patch
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diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 71d463544400..fafdf992fd32 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -389,8 +389,6 @@  void __init arm64_memblock_init(void)
 	else
 		arm64_dma32_phys_limit = PHYS_MASK + 1;
 
-	reserve_crashkernel();
-
 	reserve_elfcorehdr();
 
 	high_memory = __va(memblock_end_of_DRAM() - 1) + 1;
@@ -430,6 +428,12 @@  void __init bootmem_init(void)
 	sparse_init();
 	zone_sizes_init(min, max);
 
+	/*
+	 * request_standard_resources() depends on crashkernel's memory being
+	 * reserved, so do it here.
+	 */
+	reserve_crashkernel();
+
 	memblock_dump_all();
 }