CONFIG_DEBUG_RODATA was switched to default yes in v4.6+ kernels. Whilst the feature works correctly it causes changes with how the kernel .head.text and .text sections are padded which allows for memory below 0x80000 (512KB) to be non-reserved and used as memory for DMA allocations which do not work on Zynq due to devices not being allowed to access DDR below 0x80000. Disabling CONFIG_DEBUG_RODATA prevents the padding between .head.text/.text.
Signed-off-by: Nathan Rossi <[email protected]> --- recipes-kernel/linux/config/xilinx-common/bsp/xilinx/soc/zynq7.cfg | 3 +++ 1 file changed, 3 insertions(+) diff --git a/recipes-kernel/linux/config/xilinx-common/bsp/xilinx/soc/zynq7.cfg b/recipes-kernel/linux/config/xilinx-common/bsp/xilinx/soc/zynq7.cfg index 935848758c..b6dc0dbd6e 100644 --- a/recipes-kernel/linux/config/xilinx-common/bsp/xilinx/soc/zynq7.cfg +++ b/recipes-kernel/linux/config/xilinx-common/bsp/xilinx/soc/zynq7.cfg @@ -40,3 +40,6 @@ CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y CONFIG_CPU_IDLE=y CONFIG_ARM_ZYNQ_CPUIDLE=y +# DEBUG_RODATA causes issues with the lower 512KB of memory which doesn't do DMA +# CONFIG_DEBUG_RODATA is not set + -- 2.10.2 -- _______________________________________________ meta-xilinx mailing list [email protected] https://lists.yoctoproject.org/listinfo/meta-xilinx
