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. The existing workaround for Cortex-A76 erratum 1165522 is the same, so the first patch renames this workaround to a generic name (SPECULATIVE_AT), the second patch then adds the detection for the Cortex-A55 erratum 1530923. Steven Price (2): arm64: Rename WORKAROUND_1165522 to SPECULATIVE_AT arm64: Workaround for Cortex-A55 erratum 1530923 Documentation/arm64/silicon-errata.rst | 2 ++ arch/arm64/Kconfig | 17 +++++++++++++++++ arch/arm64/include/asm/cpucaps.h | 2 +- arch/arm64/include/asm/kvm_host.h | 2 +- arch/arm64/include/asm/kvm_hyp.h | 7 +++---- arch/arm64/kernel/cpu_errata.c | 23 ++++++++++++++++++----- arch/arm64/kvm/hyp/switch.c | 6 +++--- arch/arm64/kvm/hyp/tlb.c | 8 ++++---- 8 files changed, 49 insertions(+), 18 deletions(-) -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
