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ARM: 9323/1: mm: Fix ARCH_LOW_ADDRESS_LIMIT when CONFIG_ZONE_DMA

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Configuring VMSPLIT_2G + LPAE on Raspberry Pi 4 leads to SWIOTLB
buffer allocation beyond platform dma_zone_size of SZ_1G, which
results in broken SD card boot.

So fix this be setting ARCH_LOW_ADDRESS_LIMIT in CONFIG_ZONE_DMA
case.

Suggested-by: Russell King <rmk+kernel@armlinux.org.uk>
Fixes: e9faf9b0b0 ("ARM: add multi_v7_lpae_defconfig")
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
This commit is contained in:
wahrenst
2023-09-06 22:40:12 +01:00
committed by Russell King (Oracle)
parent 3562257b34
commit 399da29ff5
1 changed files with 3 additions and 0 deletions
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arch/arm/include/asm/dma.h
+3
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@@ -12,6 +12,9 @@
extern phys_addr_t arm_dma_zone_size; \
arm_dma_zone_size && arm_dma_zone_size < (0x100000000ULL - PAGE_OFFSET) ? \
(PAGE_OFFSET + arm_dma_zone_size) : 0xffffffffUL; })
extern phys_addr_t arm_dma_limit;
#define ARCH_LOW_ADDRESS_LIMIT arm_dma_limit
#endif
#ifdef CONFIG_ISA_DMA_API