On an LPAE system, the physical addresses used by VirtIO-MMIO may be larger than 32 bits, even if the header and configuration space addresses fit into 32 bits. For example with the Versatile Express memory map using 4G memory, the following error occured when trying to use a VirtIO-MMIO block device.
EXT2-fs (vda): error: ext2_check_page: bad entry in directory #2: : unaligned directory entry - offset=0, inode=3755990991, rec_len=57311, name_len=223 To fix this, select ARCH_DMA_ADDR_T_64BIT when both LPAE and VIRTIO_MMIO are selected. Signed-off-by: Christopher Covington <[email protected]> --- arch/arm/mm/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 1f8fed9..a62bcc9 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -617,6 +617,7 @@ config ARM_LPAE bool "Support for the Large Physical Address Extension" depends on MMU && CPU_32v7 && !CPU_32v6 && !CPU_32v5 && \ !CPU_32v4 && !CPU_32v3 + select ARCH_DMA_ADDR_T_64BIT if VIRTIO_MMIO help Say Y if you have an ARMv7 processor supporting the LPAE page table format and you would like to access memory beyond the -- Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by the Linux Foundation. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
