diff options
| author | wahrenst <wahrenst@gmx.net> | 2023-09-07 00:40:12 +0300 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-10-05 18:15:42 +0300 |
| commit | 399da29ff5eb3f675c71423bec4cf2208f218576 (patch) | |
| tree | 70a13b6052cef019dbd7582b24c49ab727d03585 | |
| parent | 3562257b34165bc9553fefbd48a85dc9337c14bb (diff) | |
| download | linux-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.h | 3 |
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 |