问题：os处于正常运行状态，切到UBMC版本为什么会导致os异常？
- 切回OBMC版本，查看os日志
问题复现步骤
1、默认是宝德OpenBMC版本
- KVM正常、上下电正常、CPU温度获取（PECI）正常
2、切到UBMC版本
- 读写cpu温度出现
IO error（通过PECI sysfs接口读）- 当前怀疑IO error只是表象，PECI sysfs接口读写之前CPU已经挂死
- 注意：服务器第一次从OpenBMC版本切换到UBMC版本的时候不会出现IO error，以后怎么切版本都会报错
- 调试信息
devmem 0x1e78051c
0x00014747
devmem 0x1e780500
0x7E47477E
- peci error
/sys/class/hwmon/hwmon0 # cat temp2_label
DTS
/sys/class/hwmon/hwmon0 # cat temp2_input
cat: read error: Input/output error
/sys/class/hwmon/hwmon0 # cat temp3_input
cat: read error: Input/output error
/sys/class/hwmon/hwmon0 # cat temp4_input
[ 1193.712211] ------------[ cut here ]------------
[ 1193.717448] WARNING: CPU: 1 PID: 4953 at drivers/peci/request.c:127 peci_request_status+0xc0/0xcc
[ 1193.727569] Unknown PECI completion code: 0x83
[ 1193.732696] Modules linked in: iptable_nat iptable_filter ip6table_filter xt_MASQUERADE xt_limit timeriomem_rng rng_core xt_tcpudp xt_nat ip6table_nat ip6_tables nf_nat nf_conntrack libcrc32c nf_ds
[ 1193.756772] CPU: 1 PID: 4953 Comm: cat Tainted: G W 6.6.0-openeuler-g6de5afc857be #1
[ 1193.767015] Hardware name: Generic DT based system
[ 1193.772410] unwind_backtrace from show_stack+0x10/0x14
[ 1193.778320] show_stack from dump_stack_lvl+0x40/0x4c
[ 1193.784035] dump_stack_lvl from __warn+0x84/0xc8
[ 1193.789360] __warn from warn_slowpath_fmt+0x1c4/0x1cc
[ 1193.795176] warn_slowpath_fmt from peci_request_status+0xc0/0xcc
[ 1193.802055] peci_request_status from peci_request_xfer_retry+0x3c/0x16c
[ 1193.809614] peci_request_xfer_retry from peci_xfer_pkg_cfg_readl+0x38/0x5c
[ 1193.817454] peci_xfer_pkg_cfg_readl from peci_pcs_read+0xc/0x48
[ 1193.824238] peci_pcs_read from get_temp_target+0xc8/0x13c
[ 1193.830427] get_temp_target from hwmon_attr_show+0x3c/0x7c
[ 1193.836722] hwmon_attr_show from dev_attr_show+0x18/0x48
[ 1193.842821] dev_attr_show from sysfs_kf_seq_show+0x80/0x108
[ 1193.849210] sysfs_kf_seq_show from seq_read_iter+0x178/0x550
[ 1193.855694] seq_read_iter from vfs_read+0x1dc/0x2d0
[ 1193.861304] vfs_read from ksys_read+0x70/0xf0
[ 1193.866334] ksys_read from ret_fast_syscall+0x0/0x54
[ 1193.872035] Exception stack(0xe4e75fa8 to 0xe4e75ff0)
[ 1193.877722] 5fa0: 00001000 7e902c2c 00000003 7e902c2c 00001000 00000001
[ 1193.886896] 5fc0: 00001000 7e902c2c 00000003 00000003 0055b5d8 00000000 00000000 00000001
[ 1193.896071] 5fe0: 0055abbc 7e902bf0 00497320 76dd23ac
[ 1193.901994] ---[ end trace 0000000000000000 ]---
cat: read error: Input/output error
3、从UBMC版本切到宝德OpenBMC版本，会出现如下报错
- KVM界面带内卡死
- web界面上下电操作失效，必须AC才能恢复
[ 103.972272] intel_peci_client: probe of 0-30 failed with error -11
[ 104.008029] intel_peci_client: probe of 0-31 failed with error -11
Phosphor OpenBMC (Phosphor OpenBMC Project Reference Distro) PR2715B-BD-00-FR-BMC-1.0.5 intel-obmc ttyS4
intel-obmc login: [ 112.597660] jffs2: warning: (2439) jffs2_get_inode_nodes: Eep. No valid nodes for ino #15927.
[ 112.607354] jffs2: warning: (2439) jffs2_do_read_inode_internal: no data nodes found for ino #15927
[ 112.617619] jffs2: iget() failed for ino #15927
[ 112.818698] jffs2: error: (2439) jffs2_do_read_inode: requested to read a nonexistent ino 15927
[ 112.828589] jffs2: iget() failed for ino #15927
[ 118.021686] bmc-services-ready.sh[320]: Required services for the BMC readiness are in active state.
[ 119.338009] intel_peci_client: probe of 0-30 failed with error -11
[ 119.366360] intel_peci_client: probe of 0-31 failed with error -11
[ 134.446451] intel_peci_client: probe of 0-30 failed with error -11
[ 134.490009] intel_peci_client: probe of 0-31 failed with error -11
[ 149.617980] intel_peci_client: probe of 0-30 failed with error -11
[ 149.688048] intel_peci_client: probe of 0-31 failed with error -11
[ 152.729175] loop0: detected capacity change from 0 to 96192
[ 164.706432] intel_peci_client: probe of 0-30 failed with error -11
[ 164.721008] intel_peci_client: probe of 0-31 failed with error -11
[ 179.743844] intel_peci_client: probe of 0-30 failed with error -11
[ 179.772175] intel_peci_client: probe of 0-31 failed with error -11
[ 194.790323] intel_peci_client: probe of 0-30 failed with error -11
[ 194.809471] intel_peci_client: probe of 0-31 failed with error -11
started applyonreset service
zram0 swap already enabled.
[ 203.167451] jffs2: error: (9242) jffs2_do_read_inode: requested to read a nonexistent ino 15927
[ 203.177379] jffs2: iget() failed for ino #15927
[ 203.223014] jffs2: error: (9242) jffs2_do_read_inode: requested to read a nonexistent ino 15927
[ 203.232893] jffs2: iget() failed for ino #15927
[ 209.853244] intel_peci_client: probe of 0-30 failed with error -11
[ 209.889855] intel_peci_client: probe of 0-31 failed with error -11
[ 224.904961] intel_peci_client: probe of 0-30 failed with error -11
[ 224.931096] intel_peci_client: probe of 0-31 failed with error -11
[ 239.945322] intel_peci_client: probe of 0-30 failed with error -11
[ 239.970178] intel_peci_client: probe of 0-31 failed with error -11
[ 254.991316] intel_peci_client: probe of 0-30 failed with error -11
[ 255.013999] intel_peci_client: probe of 0-31 failed with error -11
[ 270.051781] intel_peci_client: probe of 0-30 failed with error -11
[ 270.071023] intel_peci_client: probe of 0-31 failed with error -11