linux-kernel - [PATCH v3 0/2] MTE support for KVM guest

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Date:   Fri, 25 Sep 2020 10:36:05 +0100
From:   Steven Price <steven.price@....com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>
Cc:     Steven Price <steven.price@....com>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Dave Martin <Dave.Martin@....com>,
        Mark Rutland <mark.rutland@....com>,
        Thomas Gleixner <tglx@...utronix.de>, qemu-devel@...gnu.org,
        Juan Quintela <quintela@...hat.com>,
        "Dr. David Alan Gilbert" <dgilbert@...hat.com>,
        Richard Henderson <richard.henderson@...aro.org>,
        Peter Maydell <peter.maydell@...aro.org>,
        Haibo Xu <Haibo.Xu@....com>
Subject: [PATCH v3 0/2] MTE support for KVM guest

Version 3 of adding MTE support for KVM guests. See the previous (v2)
posting for background:

 https://lore.kernel.org/r/20200904160018.29481-1-steven.price%40arm.com

These patches add support to KVM to enable MTE within a guest. They are
based on Catalin's v9 MTE user-space support series[1] (currently in
next).

Changes since v2:

 * MTE is no longer a VCPU feature, instead it is a VM cap.

 * Being a VM cap means easier probing (check for KVM_CAP_ARM_MTE).

 * The cap must be set before any VCPUs are created, preventing any
   shenanigans where MTE is enabled for the guest after memory accesses
   have been performed.

[1] https://lore.kernel.org/r/20200904103029.32083-1-catalin.marinas@arm.com

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                       | 15 +++++++++++++++
 arch/arm64/kvm/sys_regs.c                  | 20 +++++++++++++++-----
 include/uapi/linux/kvm.h                   |  1 +
 8 files changed, 66 insertions(+), 6 deletions(-)

-- 
2.20.1