This series adds support for Arm's Memory Tagging Extension (MTE) to KVM, allowing KVM guests to make use of it. This builds on the existing user space support already in v5.10-rc1, see [1] for an overview. [1] https://lwn.net/Articles/834289/ Changes since v3[2]: * Rebased on v5.10-rc1 (required updating KVM_CAP number). * Clarified redundant test for system_supports_mte() with a comment. * Added Reviewed-by tags from Andrew - thanks! [2] https://lore.kernel.org/r/20200925093607.3051-1-steven.price%40arm.com Haibo plans to start looking at the QEMU support for this. I believe what is in this series should be sufficient, but there is still some concern that we need more kernel support for easily accessing the tags for migrating the VM. I don't expect any extra support to change the interfaces defined here, but rather build on them. My only reservation would be whether we want to expose the KVM_CAP before everything is ready. Steven Price (2): arm64: kvm: Save/restore MTE registers arm64: kvm: Introduce MTE VCPU feature arch/arm64/include/asm/kvm_emulate.h | 3 +++ arch/arm64/include/asm/kvm_host.h | 7 +++++++ arch/arm64/include/asm/sysreg.h | 3 ++- arch/arm64/kvm/arm.c | 9 +++++++++ arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 14 ++++++++++++++ arch/arm64/kvm/mmu.c | 20 ++++++++++++++++++++ arch/arm64/kvm/sys_regs.c | 20 +++++++++++++++----- include/uapi/linux/kvm.h | 1 + 8 files changed, 71 insertions(+), 6 deletions(-) -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
