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authorwahrenst <wahrenst@gmx.net>2023-09-07 00:40:12 +0300
committerRussell King (Oracle) <rmk+kernel@armlinux.org.uk>2023-10-05 18:15:42 +0300
commit399da29ff5eb3f675c71423bec4cf2208f218576 (patch)
tree70a13b6052cef019dbd7582b24c49ab727d03585
parent3562257b34165bc9553fefbd48a85dc9337c14bb (diff)
downloadlinux-399da29ff5eb3f675c71423bec4cf2208f218576.tar.xz
ARM: 9323/1: mm: Fix ARCH_LOW_ADDRESS_LIMIT when CONFIG_ZONE_DMA
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: e9faf9b0b07a ("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>
-rw-r--r--arch/arm/include/asm/dma.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h
index c6aded1b069c..e2a1916013e7 100644
--- a/arch/arm/include/asm/dma.h
+++ b/arch/arm/include/asm/dma.h
@@ -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