Messages in this thread Patch in this message | | | Date | Fri, 21 Mar 2014 16:27:50 +0000 | From | Catalin Marinas <> | Subject | Re: [PATCH] ARM: Use 64-bit DMA addresses for LPAE+VirtIO-MMIO |
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On Wed, Mar 19, 2014 at 05:35:19PM +0000, Christopher Covington wrote: > 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 <cov@codeaurora.org> > --- > 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
That's the wrong place to enable ARCH_DMA_ADDR_T_64BIT. Do you have a platform with >32-bit physical address space? If yes, it should be selected there.
-- Catalin
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