On Sun, Oct 4, 2015 at 6:08 PM, Guenter Roeck <li...@roeck-us.net> wrote: > On 10/04/2015 02:38 PM, Beniamino Galvani wrote: >> >> On Sun, Oct 04, 2015 at 02:11:35PM -0700, Guenter Roeck wrote: >>> >>> What is your qemu command line ? >> >> >> qemu-system-arm \ >> -M cubieboard \ >> -kernel ../linux/zImage-dtb \ >> -serial stdio \ >> -append "console=ttyS0 rw root=/dev/nfs >> nfsroot=10.0.0.1:/nfs,v3 ip=10.0.0.22" \ >> -m 1024 \ >> -net nic,vlan=0,model=allwinner-emac \ >> -net tap,vlan=0,ifname=tap0,script=net-up.sh \ >> -s \ >> -d guest_errors >> >> Beniamino >> > > With the mainline kernel and sun4i-a10-cubieboard.dtb, this gives me lots of > > [ 2.480983] Division by zero in kernel. > [ 2.481074] CPU: 0 PID: 1 Comm: swapper/0 Not tainted > 4.3.0-rc3-00055-gdd36d7393d63 #1 > [ 2.481250] Hardware name: Allwinner A1X (Device Tree) > [ 2.481376] [<c02186a8>] (unwind_backtrace) from [<c0213d84>] > (show_stack+0x10/0x14) > [ 2.481544] [<c0213d84>] (show_stack) from [<c047cff0>] > (dump_stack+0x78/0x94) > [ 2.481700] [<c047cff0>] (dump_stack) from [<c047bb38>] (Ldiv0+0x8/0x10) > [ 2.481848] [<c047bb38>] (Ldiv0) from [<c0886ab0>] > (sun4i_a10_get_mod0_factors+0x74/0xb8) > [ 2.482024] [<c0886ab0>] (sun4i_a10_get_mod0_factors) from [<c08867e4>] > (clk_factors_determine_rate+0x68/0xfc) > [ 2.482231] [<c08867e4>] (clk_factors_determine_rate) from [<c0871070>] > (clk_composite_determine_rate+0x94/0x1d0) > [ 2.482443] [<c0871070>] (clk_composite_determine_rate) from [<c086c960>] > (clk_core_round_rate_nolock+0x84/0xa8) > [ 2.482654] [<c086c960>] (clk_core_round_rate_nolock) from [<c086dcbc>] > (clk_round_rate+0x38/0x54) > [ 2.482845] [<c086dcbc>] (clk_round_rate) from [<c084246c>] > (sunxi_mmc_set_ios+0x9c/0x314) > [ 2.483023] [<c084246c>] (sunxi_mmc_set_ios) from [<c0814564>] > (mmc_power_up+0xf8/0x104) > [ 2.483197] [<c0814564>] (mmc_power_up) from [<c08151d8>] > (mmc_start_host+0x44/0x6c) > [ 2.483363] [<c08151d8>] (mmc_start_host) from [<c0816244>] > (mmc_add_host+0x58/0x7c) > [ 2.483528] [<c0816244>] (mmc_add_host) from [<c0842b6c>] > (sunxi_mmc_probe+0x488/0x590) > [ 2.483701] [<c0842b6c>] (sunxi_mmc_probe) from [<c06287d0>] > (platform_drv_probe+0x48/0xa4) >
I think that's the expected warnings we have been ignoring. I have a hack to make them go away. > Do you have a special devicetree file ? > > It also doesn't seem to accept the qemu "initrd" argument, which is > unexpected. > Yes I noticed the same and went to the SATA solution. Regards, Peter > Any idea what might be wrong ? Here is the command line I tried. > > qemu-system-arm \ > -M cubieboard -kernel arch/arm/boot/zImage -no-reboot \ > -initrd core-image-minimal-qemuarm.cpio \ > -append "rdinit=/sbin/init console=ttyS0" \ > -nographic -monitor none -serial stdio \ > -dtb arch/arm/boot/dts/sun4i-a10-cubieboard.dtb > > Thanks, > Guenter >
