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From: Will Deacon <will@kernel.org>
To: kvmarm@lists.cs.columbia.edu
Cc: kernel-team@android.com, Marc Zyngier <maz@kernel.org>,
	Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/7] KVM: arm64: Fixes to early stage-2 fault handling
Date: Fri, 24 Jul 2020 15:34:59 +0100
Message-ID: <20200724143506.17772-1-will@kernel.org> (raw)

Hi folks,

Continuing my journey into the KVM stage-2 page-table code, here are some fixes
for a bunch of issues I spotted purely by code inspection. Most of these
involve really unusual scenarios, but I'm a bit worried about the stage-2 fault
on stage-1 page-table walk during instruction fetch from a read-only memslot,
as that feels like it might be hittable with EFI.

Anyway, feedback welcome, especially as this is a user-visible change.

Cheers,

Will

Cc: Marc Zyngier <maz@kernel.org>
Cc: Quentin Perret <qperret@google.com>
Cc: James Morse <james.morse@arm.com>
Cc: Suzuki Poulose <suzuki.poulose@arm.com>

--->8

Will Deacon (7):
  KVM: arm64: Update comment when skipping guest MMIO access instruction
  KVM: arm64: Rename kvm_vcpu_dabt_isextabt()
  KVM: arm64: Handle data and instruction external aborts the same way
  KVM: arm64: Remove useless local variable
  KVM: arm64: Move 'invalid syndrome' logic out of io_mem_abort()
  KVM: arm64: Handle stage-2 faults on stage-1 page-table walks earlier
  KVM: arm64: Separate write faults on read-only memslots from MMIO

 arch/arm64/include/asm/kvm_emulate.h |  2 +-
 arch/arm64/kvm/hyp/switch.c          |  2 +-
 arch/arm64/kvm/mmio.c                | 29 +++-------
 arch/arm64/kvm/mmu.c                 | 87 +++++++++++++++++++---------
 4 files changed, 69 insertions(+), 51 deletions(-)

-- 
2.28.0.rc0.142.g3c755180ce-goog

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Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-24 14:34 Will Deacon [this message]
2020-07-24 14:35 ` [PATCH 1/7] KVM: arm64: Update comment when skipping guest MMIO access instruction Will Deacon
2020-07-26 11:08   ` Marc Zyngier
2020-07-27 10:30     ` Will Deacon
2020-07-24 14:35 ` [PATCH 2/7] KVM: arm64: Rename kvm_vcpu_dabt_isextabt() Will Deacon
2020-07-26 11:15   ` Marc Zyngier
2020-07-27 10:30     ` Will Deacon
2020-07-24 14:35 ` [PATCH 3/7] KVM: arm64: Handle data and instruction external aborts the same way Will Deacon
2020-07-24 14:35 ` [PATCH 4/7] KVM: arm64: Remove useless local variable Will Deacon
2020-07-24 14:35 ` [PATCH 5/7] KVM: arm64: Move 'invalid syndrome' logic out of io_mem_abort() Will Deacon
2020-07-26 11:55   ` Marc Zyngier
2020-07-27 10:31     ` Will Deacon
2020-07-24 14:35 ` [PATCH 6/7] KVM: arm64: Handle stage-2 faults on stage-1 page-table walks earlier Will Deacon
2020-07-26 13:38   ` Marc Zyngier
2020-07-27 10:29     ` Will Deacon
2020-07-24 14:35 ` [PATCH 7/7] KVM: arm64: Separate write faults on read-only memslots from MMIO Will Deacon

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