From: Steven Price <steven.price@arm.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>
Cc: Steven Price <steven.price@arm.com>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Dave Martin <Dave.Martin@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
qemu-devel@nongnu.org, Juan Quintela <quintela@redhat.com>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Peter Maydell <peter.maydell@linaro.org>,
Haibo Xu <Haibo.Xu@arm.com>, Andrew Jones <drjones@redhat.com>
Subject: [PATCH v10 0/6] MTE support for KVM guest
Date: Fri, 12 Mar 2021 15:18:56 +0000 [thread overview]
Message-ID: <20210312151902.17853-1-steven.price@arm.com> (raw)
This series adds support for using the Arm Memory Tagging Extensions
(MTE) in a KVM guest.
This version is rebased on v5.12-rc2.
Changes since v9[1]:
* Check fault_status in user_mem_abort() to avoid unnecessarily
checking if tags need clearing when handling permission faults.
* The MTE CPU feature exposed is now 0b10 explicitly rather than the
host's CPU feature. This prevents problems when a newer MTE version
is supported by the host CPU.
* Add a couple of reserved u64s to struct kvm_arm_copy_mte_tags for
potential future expansion (and check they are 0 for now).
* Correctly hold slots_lock during the ioctl (rather than
embarrassingly not do any locking as before...).
* Add the structure definition to the documentation and some
improvements suggested by Peter.
[1] https://lore.kernel.org/r/20210301142315.30920-1-steven.price%40arm.com
Steven Price (6):
arm64: mte: Sync tags for pages where PTE is untagged
arm64: kvm: Introduce MTE VM feature
arm64: kvm: Save/restore MTE registers
arm64: kvm: Expose KVM_ARM_CAP_MTE
KVM: arm64: ioctl to fetch/store tags in a guest
KVM: arm64: Document MTE capability and ioctl
Documentation/virt/kvm/api.rst | 53 +++++++++++++++
arch/arm64/include/asm/kvm_emulate.h | 3 +
arch/arm64/include/asm/kvm_host.h | 9 +++
arch/arm64/include/asm/kvm_mte.h | 66 ++++++++++++++++++
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/include/asm/sysreg.h | 3 +-
arch/arm64/include/uapi/asm/kvm.h | 14 ++++
arch/arm64/kernel/asm-offsets.c | 3 +
arch/arm64/kernel/mte.c | 16 +++--
arch/arm64/kvm/arm.c | 78 ++++++++++++++++++++++
arch/arm64/kvm/hyp/entry.S | 7 ++
arch/arm64/kvm/hyp/exception.c | 3 +-
arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 21 ++++++
arch/arm64/kvm/mmu.c | 16 +++++
arch/arm64/kvm/sys_regs.c | 28 ++++++--
include/uapi/linux/kvm.h | 2 +
16 files changed, 313 insertions(+), 11 deletions(-)
create mode 100644 arch/arm64/include/asm/kvm_mte.h
--
2.20.1
next reply other threads:[~2021-03-12 15:20 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-12 15:18 Steven Price [this message]
2021-03-12 15:18 ` [PATCH v10 1/6] arm64: mte: Sync tags for pages where PTE is untagged Steven Price
2021-03-26 18:56 ` Catalin Marinas
2021-03-29 15:55 ` Steven Price
2021-03-30 10:13 ` Catalin Marinas
2021-03-31 10:09 ` Steven Price
2021-03-12 15:18 ` [PATCH v10 2/6] arm64: kvm: Introduce MTE VM feature Steven Price
2021-03-27 15:23 ` Catalin Marinas
2021-03-28 12:21 ` Catalin Marinas
2021-03-29 16:06 ` Steven Price
2021-03-30 10:30 ` Catalin Marinas
2021-03-31 7:34 ` David Hildenbrand
2021-03-31 9:21 ` Catalin Marinas
2021-03-31 9:32 ` David Hildenbrand
2021-03-31 10:41 ` Steven Price
2021-03-31 14:14 ` David Hildenbrand
2021-03-31 18:43 ` Catalin Marinas
2021-04-07 10:20 ` Steven Price
2021-04-07 15:14 ` Catalin Marinas
2021-04-07 15:30 ` David Hildenbrand
2021-04-07 15:52 ` Steven Price
2021-04-08 14:18 ` Catalin Marinas
2021-04-08 18:16 ` David Hildenbrand
2021-04-08 18:21 ` Catalin Marinas
2021-03-12 15:18 ` [PATCH v10 3/6] arm64: kvm: Save/restore MTE registers Steven Price
2021-03-12 15:19 ` [PATCH v10 4/6] arm64: kvm: Expose KVM_ARM_CAP_MTE Steven Price
2021-03-12 15:19 ` [PATCH v10 5/6] KVM: arm64: ioctl to fetch/store tags in a guest Steven Price
2021-03-12 15:19 ` [PATCH v10 6/6] KVM: arm64: Document MTE capability and ioctl Steven Price
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