*** 1- Bionic kernel + QEMU

 $ uname -r; qemu-system-ppc64 --version | head -n 1
 4.15.0-58-generic
 QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.17)

 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: hardware assisted flush sequence enabled

 $ qemu-system-ppc64 -machine pseries,? 2>&1 | grep "sbbc\|ibs\|cfpc\|ccf"
 pseries-bionic.cap-sbbc=string (Speculation Barrier Bounds Checking (broken, workaround, fixed)(null))
 pseries-bionic.cap-cfpc=string (Cache Flush on Privilege Change (broken, workaround, fixed)(null))
 pseries-bionic.cap-ibs=string (Indirect Branch Speculation (broken, fixed-ibs, fixed-ccd)(null))

 - cap-ibs=broken
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=fixed-ccd
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ibs=fixed-ibs
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ccf-assist
 qemu-system-ppc64: Property '.cap-ccf-assist' not found

*** 2- Bionic kernel + Bionic-proposed QEMU

 $ uname -r; qemu-system-ppc64 --version | head -n 1
 4.15.0-58-generic
 QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.18)

 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: hardware assisted flush sequence enabled

 $ qemu-system-ppc64 -machine pseries,? 2>&1 | grep "sbbc\|ibs\|cfpc\|ccf"
 pseries-bionic.cap-sbbc=string (Speculation Barrier Bounds Checking (broken, workaround, fixed)(null))
 pseries-bionic.cap-cfpc=string (Cache Flush on Privilege Change (broken, workaround, fixed)(null))
 pseries-bionic.cap-ibs=string (Indirect Branch Speculation (broken, workaround, fixed-ibs,fixed-ccd, fixed-na)(null))
 pseries-bionic.cap-ccf-assist=bool (Count Cache Flush Assist via HW Instruction(null))

 - cap-ibs=broken
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=fixed-ccd
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=workaround

 - cap-ibs=fixed-ibs
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=workaround

 - cap-ibs=workaround
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: full software flush sequence enabled.

 - cap-ccf-assist=off
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ccf-assist=on
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=workaround,cap-ccf-assist=on
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: hardware assisted flush sequence enabled

*** 3- Bionic-proposed kernel + Bionic-proposed QEMU

 $ uname -r; qemu-system-ppc64 --version | head -n 1
 4.15.0-60-generic
 QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.18)

 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: hardware assisted flush sequence enabled

 $ qemu-system-ppc64 -machine pseries,? 2>&1 | grep "sbbc\|ibs\|cfpc\|ccf"
 pseries-bionic.cap-sbbc=string (Speculation Barrier Bounds Checking (broken, workaround, fixed)(null))
 pseries-bionic.cap-cfpc=string (Cache Flush on Privilege Change (broken, workaround, fixed)(null))
 pseries-bionic.cap-ibs=string (Indirect Branch Speculation (broken, workaround, fixed-ibs,fixed-ccd, fixed-na)(null))
 pseries-bionic.cap-ccf-assist=bool (Count Cache Flush Assist via HW Instruction(null))

 - cap-ibs=broken
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=fixed-ccd
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=workaround

 - cap-ibs=fixed-ibs
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=workaround

 - cap-ibs=workaround
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: full software flush sequence enabled.

 - cap-ccf-assist=off
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ccf-assist=on
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=workaround,cap-ccf-assist=on
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: hardware assisted flush sequence enabled

*** 4- Bionic-proposed kernel + Disco-updates QEMU

 $ uname -r; qemu-system-ppc64 --version | head -n 1
 4.15.0-60-generic
 QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-2ubuntu3.3)

 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: hardware assisted flush sequence enabled

 $ qemu-system-ppc64 -machine pseries,? 2>&1 | grep "sbbc\|ibs\|cfpc\|ccf"
 pseries-disco.cap-sbbc=string (Speculation Barrier Bounds Checking (broken, workaround, fixed))
 pseries-disco.cap-ibs=string (Indirect Branch Speculation (broken, fixed-ibs, fixed-ccd))
 pseries-disco.cap-cfpc=string (Cache Flush on Privilege Change (broken, workaround, fixed))

 - cap-ibs=broken
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=fixed-ccd
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ibs=fixed-ibs
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ccf-assist=off
 qemu-system-ppc64: Property '.cap-ccf-assist' not found

 - cap-ccf-assist=on
 qemu-system-ppc64: Property '.cap-ccf-assist' not found

*** 5- Disco-updates kernel + Disco-updates QEMU

$  uname -r; qemu-system-ppc64 --version | head -n 1
5.0.0-23-generic
QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-2ubuntu3.3)

$  dmesg | grep count-cache
[    0.000000] count-cache-flush: hardware assisted flush sequence enabled

$  qemu-system-ppc64 -machine pseries,? 2>&1 | grep "sbbc\|ibs\|cfpc\|ccf"
pseries-disco.cap-sbbc=string (Speculation Barrier Bounds Checking (broken, workaround, fixed))
pseries-disco.cap-ibs=string (Indirect Branch Speculation (broken, fixed-ibs, fixed-ccd))
pseries-disco.cap-cfpc=string (Cache Flush on Privilege Change (broken, workaround, fixed))

 - cap-ibs=broken
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=fixed-ccd
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ibs=fixed-ibs
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ccf-assist=off
 qemu-system-ppc64: Property '.cap-ccf-assist' not found

 - cap-ccf-assist=on
 qemu-system-ppc64: Property '.cap-ccf-assist' not found

*** 6- Disco-proposed kernel + Disco-updates QEMU

 $ uname -r; qemu-system-ppc64 --version | head -n 1
 5.0.0-27-generic
 QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-2ubuntu3.3)

 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: hardware assisted flush sequence enabled
 $ qemu-system-ppc64 -machine pseries,? 2>&1 | grep "sbbc\|ibs\|cfpc\|ccf"
 pseries-disco.cap-sbbc=string (Speculation Barrier Bounds Checking (broken, workaround, fixed))
 pseries-disco.cap-ibs=string (Indirect Branch Speculation (broken, fixed-ibs, fixed-ccd))
 pseries-disco.cap-cfpc=string (Cache Flush on Privilege Change (broken, workaround, fixed))

 - cap-ibs=broken
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=fixed-ccd
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ibs=fixed-ibs
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ccf-assist=off
 qemu-system-ppc64: Property '.cap-ccf-assist' not found

 - cap-ccf-assist=on
 qemu-system-ppc64: Property '.cap-ccf-assist' not found

*** 7- Disco-proposed kernel + Disco-proposed QEMU

 $ uname -r; qemu-system-ppc64 --version | head -n 1
 5.0.0-27-generic
 QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-2ubuntu3.4)

 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: hardware assisted flush sequence enabled

 $ qemu-system-ppc64 -machine pseries,? 2>&1 | grep "sbbc\|ibs\|cfpc\|ccf"
 pseries-disco.cap-sbbc=string (Speculation Barrier Bounds Checking (broken, workaround, fixed))
 pseries-disco.cap-ibs=string (Indirect Branch Speculation (broken, workaround, fixed-ibs,fixed-ccd, fixed-na))
 pseries-disco.cap-cfpc=string (Cache Flush on Privilege Change (broken, workaround, fixed))
 pseries-disco.cap-ccf-assist=bool (Count Cache Flush Assist via HW Instruction)

 - cap-ibs=broken
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ibs=workaround
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ibs=fixed-ccd
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ibs=fixed-ibs
 qemu-system-ppc64: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=broken

 - cap-ccf-assist=off
 $ dmesg | grep count-cache
 [    0.000000] count-cache-flush: software flush disabled.

 - cap-ccf-assist=on
 qemu-system-ppc64: Requested count cache flush assist capability level not supported by kvm, try cap-ccf-assist=off