Description anolislw 2024-04-23 16:48:40 UTC

[缺陷描述]：
kernel-selftests测试arm64/vec-syscfg执行异常,Illegal instruction (core dumped)


[重现概率]：
必现


[重现步骤]
1. 下载kernel-6.6.25-2_rc1.an23.src.rpm
2. rpm -i kernel-6.6.25-2_rc1.an23.src.rpm
3. yum-builddep -y /root/rpmbuild/SPECS/kernel.spec   
   rpmbuild -bp /root/rpmbuild/SPECS/kernel.spec
   cd /root/rpmbuild/BUILD/kernel-6.6.25-2_rc1.an23/linux-6.6.25-2_rc1.an23.aarch64/tools/testing/selftests/arm64
4. make；./vec-syscfg


[期望结果]：
用例执行PASS


[实际结果]：
[root@iZbp143ti4ccpaufkzata6Z arm64]# ./vec-syscfg
TAP version 13
1..21
ok 1 SVE default vector length 16
ok 2 SVE minimum vector length 16
ok 3 SVE maximum vector length 16
ok 4 SVE current VL is 16
ok 5 SVE set VL 16 and have VL 16
ok 6 # SKIP SVE only one VL supported
ok 7 # SKIP SVE only one VL supported
ok 8 # SKIP SVE only one VL supported
ok 9 # SKIP SVE only one VL supported
Illegal instruction (core dumped)
[root@iZbp143ti4ccpaufkzata6Z arm64]# echo $?
132

[实际结果]：
环境信息：云上ecs

[root@iZbp143ti4ccpaufkzata6Z breakpoints]# uname -a
Linux iZbp143ti4ccpaufkzata6Z 6.6.25-2_rc1.an23.aarch64 #1 SMP PREEMPT_DYNAMIC Thu Apr 11 15:02:38 CST 2024 aarch64 aarch64 aarch64 GNU/Linux
[root@iZbp143ti4ccpaufkzata6Z breakpoints]#
[root@iZbp143ti4ccpaufkzata6Z breakpoints]# cat /etc/os-release
NAME="Anolis OS"
VERSION="23"
ID="anolis"
VERSION_ID="23"
PLATFORM_ID="platform:an23"
PRETTY_NAME="Anolis OS 23"
ANSI_COLOR="0;31"
HOME_URL="https://openanolis.cn/"
BUG_REPORT_URL="https://bugzilla.openanolis.cn/"

[root@iZbp143ti4ccpaufkzata6Z breakpoints]#
[root@iZbp143ti4ccpaufkzata6Z breakpoints]#
[root@iZbp143ti4ccpaufkzata6Z breakpoints]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        4.0M     0  4.0M   0% /dev
tmpfs            16G     0   16G   0% /dev/shm
tmpfs           6.1G  804K  6.1G   1% /run
efivarfs        256K   18K  239K   7% /sys/firmware/efi/efivars
/dev/nvme0n1p2   40G   13G   27G  33% /
tmpfs            16G  3.1M   16G   1% /tmp
/dev/nvme0n1p1  500M  6.5M  494M   2% /boot/efi
tmpfs           3.1G  4.0K  3.1G   1% /run/user/0
[root@iZbp143ti4ccpaufkzata6Z breakpoints]#
[root@iZbp143ti4ccpaufkzata6Z breakpoints]# free -g
               total        used        free      shared  buff/cache   available
Mem:              30           0          28           0           1          29
Swap:              0           0           0
[root@iZbp143ti4ccpaufkzata6Z breakpoints]#
[root@iZbp143ti4ccpaufkzata6Z breakpoints]# cat /proc/cmdline
BOOT_IMAGE=(hd0,gpt2)/boot/vmlinuz-6.6.25-2_rc1.an23.aarch64 root=UUID=6424d533-3c41-4ad9-89fa-1d3bf8c49fd3 ro rhgb crashkernel=0M-2G:0M,2G-64G:256M,64G-:384M iommu.passthrough=1 iommu.strict=0 cryptomgr.notests cgroup.memory=nokmem rcupdate.rcu_cpu_stall_timeout=300 quiet selinux=1 console=tty0 biosdevname=0 net.ifnames=0 console=ttyAMA0,115200n8 noibrs nvme_core.io_timeout=4294967295 nvme_core.admin_timeout=4294967295
[root@iZbp143ti4ccpaufkzata6Z breakpoints]#
[root@iZbp143ti4ccpaufkzata6Z breakpoints]# lscpu
Architecture:             aarch64
  CPU op-mode(s):         32-bit, 64-bit
  Byte Order:             Little Endian
CPU(s):                   8
  On-line CPU(s) list:    0-7
Vendor ID:                ARM
  BIOS Vendor ID:         Alibaba Cloud
  Model name:             Neoverse-N2
    BIOS Model name:      virt-rhel7.6.0  CPU @ 2.0GHz
    BIOS CPU family:      1
    Model:                0
    Thread(s) per core:   1
    Core(s) per socket:   8
    Socket(s):            1
    Stepping:             r0p0
    BogoMIPS:             100.00
    Flags:                fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm
                          3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm ssbs sb dcpodp sve2 sveaes svepmull svebitperm svesh
                          a3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh
Caches (sum of all):
  L1d:                    512 KiB (8 instances)
  L1i:                    512 KiB (8 instances)
  L2:                     8 MiB (8 instances)
  L3:                     64 MiB (1 instance)
NUMA:
  NUMA node(s):           1
  NUMA node0 CPU(s):      0-7
Vulnerabilities:
  Gather data sampling:   Not affected
  Itlb multihit:          Not affected
  L1tf:                   Not affected
  Mds:                    Not affected
  Meltdown:               Not affected
  Mmio stale data:        Not affected
  Reg file data sampling: Not affected
  Retbleed:               Not affected
  Spec rstack overflow:   Not affected
  Spec store bypass:      Mitigation; Speculative Store Bypass disabled via prctl
  Spectre v1:             Mitigation; __user pointer sanitization
  Spectre v2:             Mitigation; CSV2, BHB
  Srbds:                  Not affected
  Tsx async abort:        Not affected