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From: Rob Herring <robh@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/3] Cortex-A77 erratum 1508412 workaround
Date: Fri, 17 Jul 2020 14:52:30 -0600
Message-ID: <20200717205233.903344-1-robh@kernel.org> (raw)

This series implements the work-around for Cortex-A77 erratum 1508412.
KVM guests which don't implement the workaround can still deadlock the
system. This is also the case with the existing Cortex-A57 erratum 832075,
so we add a warning message if an erratum can cause deadlock.

Changes detailed in patches.

Rob

v2: https://lore.kernel.org/linux-arm-kernel/20200701215308.3715856-1-robh@kernel.org/
v1: https://lore.kernel.org/linux-arm-kernel/20200629213321.2953022-1-robh@kernel.org/

Rob Herring (3):
  KVM: arm64: Print warning when cpu erratum can cause guests to
    deadlock
  arm64: Add part number for Arm Cortex-A77
  arm64: Add workaround for Arm Cortex-A77 erratum 1508412

 Documentation/arm64/silicon-errata.rst |  2 ++
 arch/arm64/Kconfig                     | 19 +++++++++++++++++++
 arch/arm64/include/asm/cpucaps.h       |  3 ++-
 arch/arm64/include/asm/cputype.h       |  2 ++
 arch/arm64/include/asm/kvm_hyp.h       | 11 +++++++++++
 arch/arm64/kernel/cpu_errata.c         | 10 ++++++++++
 arch/arm64/kvm/arm.c                   |  5 +++++
 arch/arm64/kvm/hyp/switch.c            |  7 ++++---
 arch/arm64/kvm/hyp/sysreg-sr.c         |  2 +-
 arch/arm64/kvm/sys_regs.c              |  8 +++++++-
 arch/arm64/mm/fault.c                  | 10 ++++++++++
 11 files changed, 73 insertions(+), 6 deletions(-)

--
2.25.1
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Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-17 20:52 Rob Herring [this message]
2020-07-17 20:52 ` [PATCH v3 1/3] KVM: arm64: Print warning when cpu erratum can cause guests to deadlock Rob Herring
2020-07-17 20:52 ` [PATCH v3 2/3] arm64: Add part number for Arm Cortex-A77 Rob Herring
2020-07-17 20:52 ` [PATCH v3 3/3] arm64: Add workaround for Arm Cortex-A77 erratum 1508412 Rob Herring
2020-07-27 15:52   ` Andrew Scull
2020-07-29 16:38   ` Catalin Marinas
2020-07-30  8:22     ` Will Deacon
2020-07-31 22:55       ` Rob Herring
2020-08-03 15:03         ` Will Deacon
2020-07-31 23:21     ` Rob Herring

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