Comment 7 for bug 1822870

------- Comment From <email address hidden> 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>