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 v6 0/2] MTE support for KVM guest
Date: Fri, 27 Nov 2020 15:21:11 +0000 [thread overview]
Message-ID: <20201127152113.13099-1-steven.price@arm.com> (raw)
It's been a week, and I think the comments on v5 made it clear that
enforcing PROT_MTE requirements on the VMM was probably the wrong
approach. So since I've got swap working correctly without that I
thought I'd post a v6 which hopefully addresses all the comments so far.
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-rc4, see [1] for an overview.
[1] https://lwn.net/Articles/834289/
Changes since v5[2]:
* Revert back to not requiring the VMM to map all guest memory
PROT_MTE. Instead KVM will set the PG_mte_tagged flag automatically
if not present.
* Fixed swap behaviour vs v4 by always checking for saved MTE tags for
user entries in set_pte_at().
[2] https://lore.kernel.org/r/20201119153901.53705-1-steven.price%40arm.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 | 8 ++++++++
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/include/asm/sysreg.h | 3 ++-
arch/arm64/kernel/mte.c | 18 +++++++++++++-----
arch/arm64/kvm/arm.c | 9 +++++++++
arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 14 ++++++++++++++
arch/arm64/kvm/mmu.c | 16 ++++++++++++++++
arch/arm64/kvm/sys_regs.c | 20 +++++++++++++++-----
include/uapi/linux/kvm.h | 1 +
10 files changed, 82 insertions(+), 12 deletions(-)
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
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 v6 0/2] MTE support for KVM guest
Date: Fri, 27 Nov 2020 15:21:11 +0000 [thread overview]
Message-ID: <20201127152113.13099-1-steven.price@arm.com> (raw)
It's been a week, and I think the comments on v5 made it clear that
enforcing PROT_MTE requirements on the VMM was probably the wrong
approach. So since I've got swap working correctly without that I
thought I'd post a v6 which hopefully addresses all the comments so far.
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-rc4, see [1] for an overview.
[1] https://lwn.net/Articles/834289/
Changes since v5[2]:
* Revert back to not requiring the VMM to map all guest memory
PROT_MTE. Instead KVM will set the PG_mte_tagged flag automatically
if not present.
* Fixed swap behaviour vs v4 by always checking for saved MTE tags for
user entries in set_pte_at().
[2] https://lore.kernel.org/r/20201119153901.53705-1-steven.price%40arm.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 | 8 ++++++++
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/include/asm/sysreg.h | 3 ++-
arch/arm64/kernel/mte.c | 18 +++++++++++++-----
arch/arm64/kvm/arm.c | 9 +++++++++
arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 14 ++++++++++++++
arch/arm64/kvm/mmu.c | 16 ++++++++++++++++
arch/arm64/kvm/sys_regs.c | 20 +++++++++++++++-----
include/uapi/linux/kvm.h | 1 +
10 files changed, 82 insertions(+), 12 deletions(-)
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
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: "Dr. David Alan Gilbert" <dgilbert@redhat.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>,
Thomas Gleixner <tglx@linutronix.de>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 0/2] MTE support for KVM guest
Date: Fri, 27 Nov 2020 15:21:11 +0000 [thread overview]
Message-ID: <20201127152113.13099-1-steven.price@arm.com> (raw)
It's been a week, and I think the comments on v5 made it clear that
enforcing PROT_MTE requirements on the VMM was probably the wrong
approach. So since I've got swap working correctly without that I
thought I'd post a v6 which hopefully addresses all the comments so far.
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-rc4, see [1] for an overview.
[1] https://lwn.net/Articles/834289/
Changes since v5[2]:
* Revert back to not requiring the VMM to map all guest memory
PROT_MTE. Instead KVM will set the PG_mte_tagged flag automatically
if not present.
* Fixed swap behaviour vs v4 by always checking for saved MTE tags for
user entries in set_pte_at().
[2] https://lore.kernel.org/r/20201119153901.53705-1-steven.price%40arm.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 | 8 ++++++++
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/include/asm/sysreg.h | 3 ++-
arch/arm64/kernel/mte.c | 18 +++++++++++++-----
arch/arm64/kvm/arm.c | 9 +++++++++
arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 14 ++++++++++++++
arch/arm64/kvm/mmu.c | 16 ++++++++++++++++
arch/arm64/kvm/sys_regs.c | 20 +++++++++++++++-----
include/uapi/linux/kvm.h | 1 +
10 files changed, 82 insertions(+), 12 deletions(-)
--
2.20.1
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
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 v6 0/2] MTE support for KVM guest
Date: Fri, 27 Nov 2020 15:21:11 +0000 [thread overview]
Message-ID: <20201127152113.13099-1-steven.price@arm.com> (raw)
It's been a week, and I think the comments on v5 made it clear that
enforcing PROT_MTE requirements on the VMM was probably the wrong
approach. So since I've got swap working correctly without that I
thought I'd post a v6 which hopefully addresses all the comments so far.
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-rc4, see [1] for an overview.
[1] https://lwn.net/Articles/834289/
Changes since v5[2]:
* Revert back to not requiring the VMM to map all guest memory
PROT_MTE. Instead KVM will set the PG_mte_tagged flag automatically
if not present.
* Fixed swap behaviour vs v4 by always checking for saved MTE tags for
user entries in set_pte_at().
[2] https://lore.kernel.org/r/20201119153901.53705-1-steven.price%40arm.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 | 8 ++++++++
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/include/asm/sysreg.h | 3 ++-
arch/arm64/kernel/mte.c | 18 +++++++++++++-----
arch/arm64/kvm/arm.c | 9 +++++++++
arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 14 ++++++++++++++
arch/arm64/kvm/mmu.c | 16 ++++++++++++++++
arch/arm64/kvm/sys_regs.c | 20 +++++++++++++++-----
include/uapi/linux/kvm.h | 1 +
10 files changed, 82 insertions(+), 12 deletions(-)
--
2.20.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-11-27 15:21 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-27 15:21 Steven Price [this message]
2020-11-27 15:21 ` [PATCH v6 0/2] MTE support for KVM guest Steven Price
2020-11-27 15:21 ` Steven Price
2020-11-27 15:21 ` Steven Price
2020-11-27 15:21 ` [PATCH v6 1/2] arm64: kvm: Save/restore MTE registers Steven Price
2020-11-27 15:21 ` Steven Price
2020-11-27 15:21 ` Steven Price
2020-11-27 15:21 ` Steven Price
2020-12-03 17:07 ` Marc Zyngier
2020-12-03 17:07 ` Marc Zyngier
2020-12-03 17:07 ` Marc Zyngier
2020-12-03 17:07 ` Marc Zyngier
2020-12-07 14:48 ` Steven Price
2020-12-07 14:48 ` Steven Price
2020-12-07 14:48 ` Steven Price
2020-12-07 14:48 ` Steven Price
2020-12-07 15:55 ` Marc Zyngier
2020-12-07 15:55 ` Marc Zyngier
2020-12-07 15:55 ` Marc Zyngier
2020-12-07 15:55 ` Marc Zyngier
2020-11-27 15:21 ` [PATCH v6 2/2] arm64: kvm: Introduce MTE VCPU feature Steven Price
2020-11-27 15:21 ` Steven Price
2020-11-27 15:21 ` Steven Price
2020-11-27 15:21 ` Steven Price
2020-12-03 16:09 ` [PATCH v6 0/2] MTE support for KVM guest Mark Rutland
2020-12-03 16:09 ` Mark Rutland
2020-12-03 16:09 ` Mark Rutland
2020-12-03 16:09 ` Mark Rutland
2020-12-03 16:49 ` Steven Price
2020-12-03 16:49 ` Steven Price
2020-12-03 16:49 ` Steven Price
2020-12-03 16:49 ` Steven Price
2020-12-03 16:58 ` Mark Rutland
2020-12-03 16:58 ` Mark Rutland
2020-12-03 16:58 ` Mark Rutland
2020-12-03 16:58 ` Mark Rutland
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