Merged in the change from bug 1761371 as it is almost part of the same series and has the same dependencies. Closed the other bug as dup and added the change to the list in the bug description.
** Description changed: == Comment: #0 - Satheesh Rajendran <sathe...@in.ibm.com> - 2018-04-04 08:58:54 == ---Problem Description--- backport needed for spectre/meltdown mitigation machine type qemu patches Reason: - For mitigating spectre/meltdown cpu vulnerability, qemu implements the machine capabilities cfpc,sbbc,ibs, which are present in the current qemu, but the default values of it would be broken(no mitigation) even fixes in hw/fw/sw is available. + For mitigating spectre/meltdown cpu vulnerability, qemu implements the machine capabilities cfpc,sbbc,ibs, which are present in the current qemu, but the default values of it would be broken(no mitigation) even fixes in hw/fw/sw is available. Qemu further introduces machine type variant pseries-2.12-sxxm which would set bydefault below capabilities without need of explicitly mentioning it, if mitigation is available in fw/sw. which is missing needs a backport. kvm -M pseries,help 2>&1|egrep 'cap-cfpc|cap-sbbc|cap-ibs 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 Serialisation (broken, workaround, fixed)(null)) Upstream qemu Commits: 813f3cf655 ppc/spapr-caps: Define the pseries-2.12-sxxm machine type c76c0d3090 ppc/spapr-caps: Convert cap-ibs to custom spapr-cap aaf265ffde ppc/spapr-caps: Convert cap-sbbc to custom spapr-cap f27aa81e72 ppc/spapr-caps: Convert cap-cfpc to custom spapr-cap 87175d1bc5 ppc/spapr-caps: Add support for custom spapr_capabilities - cb931c2108 target/ppc: Check mask when setting cap_ppc_safe_indirect_branch + cb931c2108 target/ppc: Check mask when setting ap_ppc_safe_indirect_branch + From 1761371 merged into this bug also + 4f5b039d2b ppc/spapr-caps: Disallow setting workaround for spapr-cap-ibs + Contact Information = sathe...@in.ibm.com - - Contact Information = sathe...@in.ibm.com - ---uname output--- 4.15.0-14-generic #15-Ubuntu SMP Mon Apr 2 19:47:43 UTC 2018 - - Machine Type = power9 boston 2.2 (pvr 004e 1202) - + + Machine Type = power9 boston 2.2 (pvr 004e 1202) + ---Debugger--- A debugger is not configured - - Userspace tool common name: qemu-kvm 1:2.11+dfsg-1ubuntu5 - - The userspace tool has the following bit modes: both + + Userspace tool common name: qemu-kvm + 1:2.11+dfsg-1ubuntu5 + + The userspace tool has the following bit modes: both Userspace rpm: qemu-kvm 1:2.11+dfsg- 1ubuntu5 - Userspace tool obtained from project website: na - + Userspace tool obtained from project website: na + *Additional Instructions for sathe...@in.ibm.com: -Attach ltrace and strace of userspace application. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761372 Title: backport needed for spectre/meltdown mitigation machine type qemu patches (kvm) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1761372/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
