------- Comment From [email protected] 2019-04-10 23:12 EDT------- Hi Manoj,
Looks good, I think, here's some output: mranweil@ltc-wspoon5:~$ cat /proc/version Linux version 4.15.0-48-generic (buildd@bos02-ppc64el-015) (gcc version 7.3.0 (Ubuntu 7.3.0-27ubuntu1~18.04)) #51~lp1822870+build.2-Ubuntu SMP Wed Apr 10 21:12:08 UTC 2019 mranweil@ltc-wspoon5:~$ dmesg |grep count-cache-flush [ 0.000000] count-cache-flush: hardware assisted flush sequence enabled mranweil@ltc-wspoon5:~$ grep -H . /sys/devices/system/cpu/vulnerabilities/spectre_v2 /sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: Software count cache flush (hardware acceleratd) 29:mon> di $_switch 20 <snip> c00000000000db54 f8010170 std r0,368(r1) c00000000000db58 7ee00026 mfcr r23 c00000000000db5c fae101a0 std r23,416(r1) c00000000000db60 f8230000 std r1,0(r3) c00000000000db64 4bffdb1d bl c00000000000b680 # flush_count_cache+0x0/0x2480 c00000000000db68 3cc06000 lis r6,24576 29:mon> di $flush_count_cache 4d c00000000000b680 7d2802a6 mflr r9 c00000000000b684 48000005 bl c00000000000b688 # flush_count_cache+0x8/0x2480 ... c00000000000b784 4800001c b c00000000000b7a0 # flush_count_cache+0x120/0x2480 c00000000000b788 60000000 nop ... c00000000000b7a0 7d2803a6 mtlr r9 c00000000000b7a4 39207fff li r9,32767 c00000000000b7a8 7d2903a6 mtctr r9 c00000000000b7ac 4c400420 bcctr- 2,lt c00000000000b7b0 4e800020 blr 29:mon> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1822870 Title: Backport support for software count cache flush Spectre v2 mitigation. (CVE) (required for POWER9 DD2.3) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1822870/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
