------- Comment From mranw...@us.ibm.com 2019-08-27 12:42 EDT------- I tested this out with the same verification checks as above and got the same results. The summary is that the mitigations are detected correctly in the guest and the migrations works when it should, warns when it should, and fails when it should.
ii qemu-block-extra:ppc64el 1:2.11+dfsg-1ubuntu7.18 ppc64el extra block backend modules for qemu-system and qemu-utils ii qemu-kvm 1:2.11+dfsg-1ubuntu7.18 ppc64el QEMU Full virtualization on x86 hardware ii qemu-system-common 1:2.11+dfsg-1ubuntu7.18 ppc64el QEMU full system emulation binaries (common files) ii qemu-system-ppc 1:2.11+dfsg-1ubuntu7.18 ppc64el QEMU full system emulation binaries (ppc) ii qemu-utils 1:2.11+dfsg-1ubuntu7.18 ppc64el QEMU utilities No migration: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=on count-cache-flush: hardware assisted flush sequence enabled max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=off count-cache-flush: full software flush sequence enabled. max-cpu-compat=power9,cap-ibs=broken count-cache-flush: software flush disabled. Migrations: Source: max-cpu-compat=power9,cap-ibs=broken Target: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=off Worked w/warning: qemu-system-ppc64le: warning: cap-ibs lower level (0) in incoming stream than on destination (1) count-cache-flush: software flush disabled. Source: max-cpu-compat=power9,cap-ibs=broken Target: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=on Worked w/warning: count-cache-flush: software flush disabled. qemu-system-ppc64le: warning: cap-ibs lower level (0) in incoming stream than on destination (1) qemu-system-ppc64le: warning: cap-ccf-assist lower level (0) in incoming stream than on destination (1) count-cache-flush: software flush disabled. Source: max-cpu-compat=power9,cap-ibs=broken Target: max-cpu-compat=power9,cap-ibs=broken Worked count-cache-flush: software flush disabled. Set 2: Source: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=off Target: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=off Worked count-cache-flush: full software flush sequence enabled. Source: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=off Target: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=on Worked w/warning count-cache-flush: full software flush sequence enabled. qemu-system-ppc64le: warning: cap-ccf-assist lower level (0) in incoming stream than on destination (1) Source: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=off Target: max-cpu-compat=power9,cap-ibs=broken Failed: qemu-system-ppc64le: cap-ibs higher level (1) in incoming stream than on destination (0) qemu-system-ppc64le: error while loading state for instance 0x0 of device 'spapr' qemu-system-ppc64le: load of migration failed: Invalid argument Third set: Source: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=on Target: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=on Worked count-cache-flush: hardware assisted flush sequence enabled Source: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=on Target: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=off Failed: qemu-system-ppc64le: cap-ccf-assist higher level (1) in incoming stream than on destination (0) qemu-system-ppc64le: error while loading state for instance 0x0 of device 'spapr' qemu-system-ppc64le: load of migration failed: Invalid argument Source: max-cpu-compat=power9,cap-ibs=workaround,cap-ccf-assist=on Target: max-cpu-compat=power9,cap-ibs=broken Failed: qemu-system-ppc64le: cap-ibs higher level (1) in incoming stream than on destination (0) qemu-system-ppc64le: cap-ccf-assist higher level (1) in incoming stream than on destination (0) qemu-system-ppc64le: error while loading state for instance 0x0 of device 'spapr' qemu-system-ppc64le: load of migration failed: Invalid argument -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1832622 Title: QEMU - 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/1832622/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
