On 2018/9/19 11:19, kernel test robot wrote: > [ 0.800215] AGP: No AGP bridge found > PANIC: early exception 0xe3 IP 10:ffffffff8294623f error 0 cr2 0x0 > [ 0.815262] CPU: 0 PID: 0 Comm: swapper Not tainted 4.19.0-rc2-00018-g7ffb318 #1 > [ 0.826860] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 > [ 0.839894] RIP: 0010:early_is_amd_nb+0x30/0x4b > [ 0.846986] Code: 15 07 3e c8 ff 0f b7 cf 48 c7 c0 c0 6a 01 82 80 fa 02 74 13 80 fa 09 48 c7 c0 20 69 01 82 ba 00 00 00 00 48 0f 45 c2 c1 ef 10 <8b> 10 85 d2 74 0f 39 ca 75 05 39 78 04 74 09 48 83 c0 20 eb eb 31 > [ 0.876321] RSP: 0000:ffffffff82403e38 EFLAGS: 00010017 ORIG_RAX: 0000000000000000 > [ 0.888131] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000ffff > [ 0.899187] RDX: 0000000000000000 RSI: 000000000000c000 RDI: 000000000000ffff > [ 0.910233] RBP: 0000000000000018 R08: 0000000000000002 R09: 0000000000000000 > [ 0.921388] R10: ffffffff829ecc40 R11: ffffffff82aeed87 R12: 0000000000000000 > [ 0.932476] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > [ 0.943658] FS: 0000000000000000(0000) GS:ffffffff82909000(0000) knlGS:0000000000000000 > [ 0.956271] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 0.965216] CR2: 0000000000000000 CR3: 00000000029a2000 CR4: 00000000000006a0 > [ 0.976358] Call Trace: > [ 0.980238] ? early_gart_iommu_check+0xef/0x2c5 > [ 0.987493] ? setup_arch+0x4fa/0xc67 > [ 0.993231] ? printk+0x52/0x6e > [ 0.998157] ? start_kernel+0x6e/0x4dc > [ 1.004044] ? load_ucode_bsp+0x42/0x12e > [ 1.010145] ? secondary_startup_64+0xa4/0xb0 > BUG: kernel hang in boot stage > > Elapsed time: 700 > > #!/bin/bash > > > > To reproduce: > > git clone https://github.com/intel/lkp-tests.git > cd lkp-tests > bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email I cannot reproduce this panic on Hygon Dhyana platform. I tired lkp-tests both in Ubuntu 16.04 (with gcc-5) and Ubuntu 18.04 (with gcc-7). What kind of host do you use to run the qemu? A Intel one or AMD one? Thanks, Pu Wen
