On Thu, Jan 16, 2020 at 07:28:49AM +0000, Marc Zyngier wrote: > On 2020-01-14 16:45, Will Deacon wrote: > > On Mon, Dec 16, 2019 at 11:56:28AM +0000, Steven Price wrote: > > > Version 5 is a rebasing of version 4 (no changes). > > > > > > This series enables a workaround for Cortex-A55 erratum 1530923. The > > > erratum potentially allows TLB entries to be allocated as a result > > > of a > > > speculative AT instruction. This may happen in the middle of a guest > > > world switch while the relevant VMSA configuration is in an > > > inconsistent > > > state, leading to erroneous content being allocated into TLBs. > > > > > > There are existing workarounds for similar issues, 1165522 is > > > effectively the same, and 1319367/1319537 is similar but without VHE > > > support. Rather than add to the selection of errata, the first patch > > > renames 1165522 to WORKAROUND_SPECULATIVE_AT which can be reused (in > > > the > > > final patch) for 1530923. > > > > > > The workaround for errata 1319367 and 1319537 although similar cannot > > > use VHE (not available on those CPUs) so cannot share the workaround. > > > However, to keep some sense of symmetry the workaround is renamed to > > > SPECULATIVE_AT_NVHE. > > > > > > Changes since v4: > > > * Rebased to v5.5-rc1 > > > > Looks fine to me. Marc, are you ok with me queueing this via arm64 > > (that's > > where the existing workarounds came from), or would you prefer to take > > them > > via kvm-arm? > > Please go ahead and take it (with my ack) via the arm64 tree. Will do, thanks! Will _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
