Comment 3 for bug 1911376

This patch has been merged into bionic kernel since 4.15.0-71.80. Could you check again if current bionic-update kernel (4.15.0-130.134) still have SSB issue?

ubuntu-bionic$ gitoneline | grep SSBS
47d31180cc30 <email address hidden> 2020-03-13 00:31:00 -0400 arm64: ssbs: Fix context-switch when SSBS is present on all CPUs
46566c624c98 <email address hidden> 2019-11-12 19:04:50 +0100 arm64: Force SSBS on context switch
c76da031386f <email address hidden> 2019-11-12 19:04:50 +0100 arm64: ssbs: Don't treat CPUs with SSBS as unaffected by SSB
f2485ae5fd84 <email address hidden> 2019-11-12 19:04:48 +0100 arm64: fix SSBS sanitization
1931a913df7e <email address hidden> 2019-11-12 19:04:48 +0100 KVM: arm64: Set SCTLR_EL2.DSSBS if SSBD is forcefully disabled and !vhe
fd872fd82e12 <email address hidden> 2019-11-12 19:04:48 +0100 arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3
2a3135c3033c <email address hidden> 2019-11-12 19:04:48 +0100 arm64: cpufeature: Detect SSBS and advertise to userspace