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Message-ID: <7f1dfb0f-85ca-4251-96df-c8d4b923c4fd@csgroup.eu> Date: Wed, 18 Sep 2024 15:47:22 +0200 From: Christophe Leroy <christophe.leroy@...roup.eu> To: Luming Yu <luming.yu@...ngroup.cn> Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org, mpe@...erman.id.au, npiggin@...il.com, jialong.yang@...ngroup.cn, luming.yu@...il.com Subject: Re: [PATCH 1/2] powerpc/entry: convert to common and generic entry Hi, Le 14/09/2024 à 04:22, Luming Yu a écrit : > On Fri, Sep 13, 2024 at 02:15:40PM +0200, Christophe Leroy wrote: >> >> >> Le 13/09/2024 à 14:02, Luming Yu a écrit : >> >>>> ... >>>> nothing happens after that. >>> reproduced with ppc64_defconfig >>> [ 0.818972][ T1] Run /init as init process >>> [ 5.851684][ T240] request_module: modprobe binfmt-4c46 cannot be processed, kmod busy with 50 threads for more than 5 seconds now >>> [ 5.851742][ T240] kworker/u33:18 (240) used greatest stack depth: 13584 bytes left >>> [ 5.860081][ T232] kworker/u33:16 (232) used greatest stack depth: 13072 bytes left >>> [ 5.863145][ T210] kworker/u35:13 (210) used greatest stack depth: 12928 bytes left >>> [ 5.865000][ T1] Failed to execute /init (error -8) >>> [ 5.868897][ T1] Run /sbin/init as init process >>> [ 10.891673][ T315] request_module: modprobe binfmt-4c46 cannot be processed, kmod busy with 50 threads for more than 5 seconds now >>> [ 10.894036][ T1] Starting init: /sbin/init exists but couldn't execute it (error -8) >>> [ 10.901455][ T1] Run /etc/init as init process >>> [ 10.903154][ T1] Run /bin/init as init process >>> [ 10.904747][ T1] Run /bin/sh as init process >>> [ 15.931679][ T367] request_module: modprobe binfmt-4c46 cannot be processed, kmod busy with 50 threads for more than 5 seconds now >>> [ 15.934689][ T1] Starting init: /bin/sh exists but couldn't execute it (error -8) >> >> That's something different, this is because you built a big-endian kernel >> and you are trying to run a little-endian userspace. > okay >> >> Does it work with ppc64le_defconfig ? > make ppc64le_defconfig > > yes, it builds && boots just fine. > the host is a p8 powernv system , the qemu command line is as below: > qemu-system-ppc64 -m 64g -smp 16,cores=4,threads=4 --enable-kvm -nographic -net nic -net tap,ifname=tap0,script=/etc/qemu-ifup-nat,downscript=/etc/qemu-ifdown-nat Downloads/Fedora-Cloud-Base-38-1.6.ppc64le.qcow2 With that command you don't boot a freshly built kernel, you boot: Linux version 6.2.9-300.fc38.ppc64le (mockbuild@...dbea752814aea985bdc5347ce35da) (gcc (GCC) 13.0.1 20230318 (Red Hat 13.0.1-0), GNU ld version 2.39-9.fc38) Are you sure you tried with the ppc64le_defconfig ? On my side the boot fails as follows when using a ppc64le_defconfig vmlinux with the file Fedora-Cloud-Base-38-1.6.ppc64le.qcow2: ... [ 2.602758][ T1] md: autorun ... [ 2.602808][ T1] md: ... autorun DONE. [ 2.612596][ T189] kworker/u73:0 (189) used greatest stack depth: 29008 bytes left [ 2.617068][ T1] /dev/root: Can't open blockdev [ 2.618136][ T1] VFS: Cannot open root device "" or unknown-block(0,0): error -6 [ 2.618239][ T1] Please append a correct "root=" boot option; here are the available partitions: [ 2.618611][ T1] 0100 65536 ram0 [ 2.618768][ T1] (driver?) [ 2.619101][ T1] 0101 65536 ram1 [ 2.619120][ T1] (driver?) [ 2.619187][ T1] 0102 65536 ram2 [ 2.619199][ T1] (driver?) [ 2.619251][ T1] 0103 65536 ram3 [ 2.619261][ T1] (driver?) [ 2.619312][ T1] 0104 65536 ram4 [ 2.619322][ T1] (driver?) [ 2.619372][ T1] 0105 65536 ram5 [ 2.619382][ T1] (driver?) [ 2.619436][ T1] 0106 65536 ram6 [ 2.619447][ T1] (driver?) [ 2.619500][ T1] 0107 65536 ram7 [ 2.619519][ T1] (driver?) [ 2.619571][ T1] 0108 65536 ram8 [ 2.619581][ T1] (driver?) [ 2.619631][ T1] 0109 65536 ram9 [ 2.619641][ T1] (driver?) [ 2.619690][ T1] 010a 65536 ram10 [ 2.619700][ T1] (driver?) [ 2.619754][ T1] 010b 65536 ram11 [ 2.619764][ T1] (driver?) [ 2.619818][ T1] 010c 65536 ram12 [ 2.619827][ T1] (driver?) [ 2.619880][ T1] 010d 65536 ram13 [ 2.619889][ T1] (driver?) [ 2.619942][ T1] 010e 65536 ram14 [ 2.619952][ T1] (driver?) [ 2.620023][ T1] 010f 65536 ram15 [ 2.620036][ T1] (driver?) [ 2.620116][ T1] 0b00 1048575 sr0 [ 2.620150][ T1] driver: sr [ 2.620221][ T1] 0800 5242880 sda [ 2.620234][ T1] driver: sd [ 2.620310][ T1] 0801 4096 sda1 709431c7-74bd-4ec4-bbe8-d4f7e7e3194e [ 2.620369][ T1] [ 2.620449][ T1] 0802 1024000 sda2 e0b0a6de-ca8f-4e50-808c-121324c94d04 [ 2.620463][ T1] [ 2.620531][ T1] 0803 102400 sda3 8ed2fbf1-fd2c-4ab0-b66f-d31df1d24e3e [ 2.620544][ T1] [ 2.620599][ T1] 0804 1024 sda4 46dc7fc8-bf10-4166-9bc8-98daabbec06d [ 2.620610][ T1] [ 2.620666][ T1] 0805 4109312 sda5 8a52b54b-c379-43a5-bf8d-a43fdef4a370 [ 2.620676][ T1] [ 2.620838][ T1] List of all bdev filesystems: [ 2.620884][ T1] ext3 [ 2.620918][ T1] ext2 [ 2.620947][ T1] ext4 [ 2.620971][ T1] msdos [ 2.620995][ T1] iso9660 [ 2.621018][ T1] xfs [ 2.621050][ T1] [ 2.621311][ T1] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 2.621992][ T1] CPU: 2 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.0-06480-gfabc9e955334 #1217 [ 2.622166][ T1] Hardware name: IBM pSeries (emulated by qemu) POWER9 (architected) 0x4e1200 0xf000005 of:SLOF,HEAD pSeries [ 2.622456][ T1] Call Trace: [ 2.622574][ T1] [c000000003797ad0] [c000000001189fe8] dump_stack_lvl+0xd8/0xf0 (unreliable) [ 2.623575][ T1] [c000000003797b00] [c00000000014830c] panic+0x2f8/0x4fc [ 2.623666][ T1] [c000000003797ba0] [c000000002006858] mount_root_generic+0x2c8/0x474 [ 2.623748][ T1] [c000000003797c70] [c000000002006f40] prepare_namespace+0x94/0x3a4 [ 2.623804][ T1] [c000000003797d00] [c000000002005e7c] kernel_init_freeable+0x4cc/0x530 [ 2.623896][ T1] [c000000003797de0] [c000000000011138] kernel_init+0x34/0x26c [ 2.623954][ T1] [c000000003797e50] [c00000000000debc] ret_from_kernel_user_thread+0x14/0x1c [ 2.624025][ T1] --- interrupt: 0 at 0x0 [ 4.502550][ T1] pstore: backend (nvram) writing error (-1) qemu-system-ppc64: OS terminated: Christophe
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