On Tue, Apr 07, 2020 at 11:02:03AM +0100, Russell King - ARM Linux admin wrote: > On Mon, Apr 06, 2020 at 10:27:20AM +0200, Corentin Labbe wrote: > > Hello > > > > I am trying to add the last missing Allwinner Soc in kernelci: the A80. > > But this SoC does not have any way to be used in kernelci, no USB nor network in uboot. > > So I have tried to fake uboot since the kernel has network support and run the new kernel via kexec. > > > > But kexec 2.0.18 fail to work: > > kexec --force /tmp/kernel --initrd /tmp/ramdisk --dtb /tmp/dtb --command-line='console=ttyS0,115200n8 root=/dev/ram0 earlycon=uart,mmio32,0x7000000 ip=dhcp' > > As I mentioned in my other reply, this apparent "kexec" command line > does not seem to reflect the arguments you actually used to invoke > the kexec output below. > > > syscall kexec_file_load not available. > > This message is produced by do_kexec_file_load(). This function is only > invoked if the do_kexec_file_syscall flag in main() is set. This flag > is only set if one of: > > --kexec-file-syscall > --kexec-syscall > --kexec-syscall-auto > -s > -c > -a > > are provided on the kexec command line. Your command line above does > not contain any of those arguments, so either the command line is not > what you used, or you are using a patched kexec, or your compiler is > grossly miscompiling kexec. > > > Try gzip decompression. > > kernel: 0xb6535008 kernel_size: 0x853200 > > MEMORY RANGES > > 0000000020000000-000000009fffffff (0) > > Then there's the debug output, which is only produced if the > kexec_debug global is set, which in turn is only set if --debug or -d > is supplied on the kexec command line - which again, your kexec > command line does not contain this. > > > zImage header: 0x016f2818 0x00000000 0x00853200 > > zImage size 0x853200, file size 0x853200 > > zImage requires 0x00864200 bytes > > offset 0x0000bae4 tag 0x5a534c4b size 8 > > Decompressed kernel sizes: > > text+data 0x0158b3a0 bss 0x000632f0 total 0x015ee690 > > Resulting kernel space: 0x01def5a0 > > Kernel: address=0x20008000 size=0x01def5a0 > > Initrd: address=0x21df8000 size=0x0090b6fa > > DT : address=0x22704000 size=0x00005c09 > > kexec_load: entry = 0x20008000 flags = 0x280000 > > nr_segments = 3 > > segment[0].buf = 0xb6535008 > > segment[0].bufsz = 0x853204 > > segment[0].mem = 0x20008000 > > segment[0].memsz = 0x854000 > > segment[1].buf = 0xb5c29008 > > segment[1].bufsz = 0x90b6fa > > segment[1].mem = 0x21df8000 > > segment[1].memsz = 0x90c000 > > segment[2].buf = 0x4db50 > > segment[2].bufsz = 0x5c09 > > segm[ 71.039126] kexec_core: Starting new kernel > > ent[2].mem = 0[ 71.044712] Disabling non-boot CPUs ... > > x22704000 > > segment[2].memsz = 0x6000 > > [ 71.489070] Bye! > > > > > > I have tried also kexec-2.0.20 > > Try gzip decompression. > > zImage header: 0x00000000 0x000019b4 0x00001000 > > zImage requires 0x008641c0 bytes > > Could not find a free area of memory of 0x86c1c0 bytes... > > Cannot load /tmp/kernel > > kexec 2.0.20 doesn't appear to have changed anything to do with how > allocations are done. The above output looks even more strange and > confusing. "zImage header" is produced by debugging prints, which > imply that kexec_debug was set. > > However, the "MEMORY RANGES" output is missing - this has not gone > away with kexec 2.0.20, it's still there, and works for me (I've > just built and tested kexec 2.0.20). > > Also, the values on the "zImage header" line are completely messed > up; the first should be the zImage magic value and it is not - that > suggests that the file being loaded is not a zImage file, or is > corrupted. Under a VM (the kernel doesn't have kexec support - but that's not a problem, because the initial loading stages are the relevant parts which all happen in userspace): # build/sbin/kexec --version kexec-tools 2.0.20 # build/sbin/kexec --debug --load virt-vmlinuz-5.4.0+ Try gzip decompression. kernel: 0xb6a6c008 kernel_size: 0x407358 MEMORY RANGES 0000000040000000-000000007fffffff (0) zImage header: 0x016f2818 0x00000000 0x00407358 zImage size 0x407358, file size 0x407358 zImage requires 0x00418358 bytes offset 0x00007178 tag 0x5a534c4b size 12 Decompressed kernel sizes: text+data 0x00c2ed24 bss 0x000319ec total 0x00c60710 Resulting kernel space: 0x0104707c Kernel: address=0x40008000 size=0x0104707c DT : address=0x41051000 size=0x00100000 kexec_load: entry = 0x40008000 flags = 0x280000 nr_segments = 2 segment[0].buf = 0xb6a6c008 segment[0].bufsz = 0x40735c segment[0].mem = 0x40008000 segment[0].memsz = 0x408000 segment[1].buf = 0xb696b008 segment[1].bufsz = 0x100000 segment[1].mem = 0x41051000 segment[1].memsz = 0x100000 kexec_load failed: Function not implemented entry = 0x40008000 flags = 0x280000 nr_segments = 2 segment[0].buf = 0xb6aa0008 segment[0].bufsz = 0x40735c segment[0].mem = 0x40008000 segment[0].memsz = 0x408000 segment[1].buf = 0xb699f008 segment[1].bufsz = 0x100000 segment[1].mem = 0x41051000 segment[1].memsz = 0x100000 # On a SolidRun Hummingboard2 (iMX6 based, which has kexec support, same kexec binary, first without an initrd, and then with): # build/sbin/kexec --version kexec-tools 2.0.20 # build/sbin/kexec --debug --load multi-vmlinuz-5.6.0+ Try gzip decompression. kernel: 0xb6763008 kernel_size: 0x7273a8 MEMORY RANGES 0000000010000000-000000004fffffff (0) zImage header: 0x016f2818 0x00000000 0x007273a8 zImage size 0x7273a8, file size 0x7273a8 zImage requires 0x007383a8 bytes offset 0x00004da8 tag 0x5a534c4b size 12 Decompressed kernel sizes: text+data 0x00dbedb8 bss 0x007489f8 total 0x015077b0 Resulting kernel space: 0x015077b0 Kernel: address=0x10008000 size=0x015077b0 DT : address=0x11511000 size=0x0000b000 kexec_load: entry = 0x10008000 flags = 0x280000 nr_segments = 2 segment[0].buf = 0xb6763008 segment[0].bufsz = 0x7273ac segment[0].mem = 0x10008000 segment[0].memsz = 0x728000 segment[1].buf = 0x1207cb0 segment[1].bufsz = 0xb000 segment[1].mem = 0x11511000 segment[1].memsz = 0xb000 # build/sbin/kexec --unload # build/sbin/kexec --debug --load multi-vmlinuz-5.6.0+ --initrd /boot/initrd.img-5.4.0+ Try gzip decompression. kernel: 0xb65d8008 kernel_size: 0x7273a8 MEMORY RANGES 0000000010000000-000000004fffffff (0) zImage header: 0x016f2818 0x00000000 0x007273a8 zImage size 0x7273a8, file size 0x7273a8 zImage requires 0x007383a8 bytes offset 0x00004da8 tag 0x5a534c4b size 12 Decompressed kernel sizes: text+data 0x00dbedb8 bss 0x007489f8 total 0x015077b0 Resulting kernel space: 0x015077b0 Kernel: address=0x10008000 size=0x015077b0 Initrd: address=0x11510000 size=0x0053f46a DT : address=0x11a50000 size=0x0000b044 kexec_load: entry = 0x10008000 flags = 0x280000 nr_segments = 3 segment[0].buf = 0xb65d8008 segment[0].bufsz = 0x7273ac segment[0].mem = 0x10008000 segment[0].memsz = 0x728000 segment[1].buf = 0xb6098008 segment[1].bufsz = 0x53f46a segment[1].mem = 0x11510000 segment[1].memsz = 0x540000 segment[2].buf = 0x993cf0 segment[2].bufsz = 0xb044 segment[2].mem = 0x11a50000 segment[2].memsz = 0xc000 On clearfog (Armada 388): # build/sbin/kexec --debug --load multi-vmlinuz-5.6.0+ Try gzip decompression. kernel: 0xb6745008 kernel_size: 0x7273a8 MEMORY RANGES 0000000000000000-000000003fffffff (0) zImage header: 0x016f2818 0x00000000 0x007273a8 zImage size 0x7273a8, file size 0x7273a8 zImage requires 0x007383a8 bytes offset 0x00004da8 tag 0x5a534c4b size 12 Decompressed kernel sizes: text+data 0x00dbedb8 bss 0x007489f8 total 0x015077b0 Resulting kernel space: 0x015077b0 Kernel: address=0x00008000 size=0x015077b0 DT : address=0x01511000 size=0x00007be3 kexec_load: entry = 0x8000 flags = 0x280000 nr_segments = 2 segment[0].buf = 0xb6745008 segment[0].bufsz = 0x7273ac segment[0].mem = 0x8000 segment[0].memsz = 0x728000 segment[1].buf = 0x1be7f68 segment[1].bufsz = 0x7be3 segment[1].mem = 0x1511000 segment[1].memsz = 0x8000 All appears to work fine. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
