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: Mark Rutland <mark.rutland@arm.com>,
Peter Maydell <peter.maydell@linaro.org>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Andrew Jones <drjones@redhat.com>, Haibo Xu <Haibo.Xu@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
qemu-devel@nongnu.org, Dave Martin <Dave.Martin@arm.com>,
Juan Quintela <quintela@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
linux-kernel@vger.kernel.org, Steven Price <steven.price@arm.com>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v14 0/8] MTE support for KVM guest
Date: Mon, 7 Jun 2021 12:08:08 +0100 [thread overview]
Message-ID: <20210607110816.25762-1-steven.price@arm.com> (raw)
This series adds support for using the Arm Memory Tagging Extensions
(MTE) in a KVM guest.
Changes since v13[1]:
* Add Reviewed-by tags from Catalin - thanks!
* Introduce a new function mte_prepare_page_tags() for handling the
initialisation of pages ready for a KVM guest. This takes the big
tag_sync_lock removing any race with the VMM (or another guest)
around clearing the tags and setting PG_mte_tagged.
* The ioctl to fetch/store tags now returns the number of bytes
processed so userspace can tell how far a partial fetch/store got.
* Some minor refactoring to tidy up the code thanks to pointers from
Catalin.
[1] https://lore.kernel.org/r/20210524104513.13258-1-steven.price%40arm.com
Catalin Marinas (1):
arm64: Handle MTE tags zeroing in __alloc_zeroed_user_highpage()
Steven Price (7):
arm64: mte: Handle race when synchronising tags
arm64: mte: Sync tags for pages where PTE is untagged
KVM: arm64: Introduce MTE VM feature
KVM: arm64: Save/restore MTE registers
KVM: arm64: 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 | 57 +++++++++++++++
arch/arm64/include/asm/kvm_arm.h | 3 +-
arch/arm64/include/asm/kvm_emulate.h | 3 +
arch/arm64/include/asm/kvm_host.h | 12 ++++
arch/arm64/include/asm/kvm_mte.h | 66 +++++++++++++++++
arch/arm64/include/asm/mte-def.h | 1 +
arch/arm64/include/asm/mte.h | 8 ++-
arch/arm64/include/asm/page.h | 6 +-
arch/arm64/include/asm/pgtable.h | 22 +++++-
arch/arm64/include/asm/sysreg.h | 3 +-
arch/arm64/include/uapi/asm/kvm.h | 11 +++
arch/arm64/kernel/asm-offsets.c | 2 +
arch/arm64/kernel/mte.c | 54 ++++++++++++--
arch/arm64/kvm/arm.c | 16 +++++
arch/arm64/kvm/guest.c | 82 ++++++++++++++++++++++
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 | 42 ++++++++++-
arch/arm64/kvm/reset.c | 3 +-
arch/arm64/kvm/sys_regs.c | 32 +++++++--
arch/arm64/mm/fault.c | 21 ++++++
include/uapi/linux/kvm.h | 2 +
23 files changed, 454 insertions(+), 23 deletions(-)
create mode 100644 arch/arm64/include/asm/kvm_mte.h
--
2.20.1
next reply other threads:[~2021-06-07 11:32 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 11:08 Steven Price [this message]
2021-06-07 11:08 ` [PATCH v14 1/8] arm64: mte: Handle race when synchronising tags Steven Price
2021-06-09 10:30 ` Marc Zyngier
2021-06-09 10:51 ` Steven Price
2021-06-09 11:19 ` Marc Zyngier
2021-06-09 17:41 ` Catalin Marinas
2021-06-10 8:05 ` Steven Price
2021-06-10 14:07 ` Catalin Marinas
2021-06-07 11:08 ` [PATCH v14 2/8] arm64: Handle MTE tags zeroing in __alloc_zeroed_user_highpage() Steven Price
2021-06-07 17:07 ` Catalin Marinas
2021-06-09 8:56 ` Steven Price
2021-06-07 11:08 ` [PATCH v14 3/8] arm64: mte: Sync tags for pages where PTE is untagged Steven Price
2021-06-07 11:08 ` [PATCH v14 4/8] KVM: arm64: Introduce MTE VM feature Steven Price
2021-06-07 11:08 ` [PATCH v14 5/8] KVM: arm64: Save/restore MTE registers Steven Price
2021-06-07 11:08 ` [PATCH v14 6/8] KVM: arm64: Expose KVM_ARM_CAP_MTE Steven Price
2021-06-07 11:08 ` [PATCH v14 7/8] KVM: arm64: ioctl to fetch/store tags in a guest Steven Price
2021-06-07 17:21 ` Catalin Marinas
2021-06-07 11:08 ` [PATCH v14 8/8] KVM: arm64: Document MTE capability and ioctl Steven Price
2021-06-07 17:32 ` Catalin Marinas
2021-06-09 8:56 ` Steven Price
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