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From: Marc Zyngier <maz@kernel.org>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
	linux-arm-kernel@lists.infradead.org
Cc: Peng Liang <liangpeng10@huawei.com>,
	Will Deacon <will@kernel.org>, James Morse <james.morse@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	kernel-team@android.com
Subject: [PATCH v2 0/3] KVM: arm64: Another set of CSV2-related fixes
Date: Tue, 10 Nov 2020 14:13:05 +0000
Message-ID: <20201110141308.451654-1-maz@kernel.org> (raw)

This small series addresses a couple of Spectre-v2 related issues:

- Fix a live migration regression introduced with the setting of CSV2
  on systems that are not affected by Spectre-v2, but that don't
  directly expose it in ID_AA64PFR0_EL1

- Inject an UNDEF exception if the guest tries to access any of
  SCXTNUM_ELx, as we don't advertise it to guests.

Patches on top of 5.10-rc2.

* From v1:
  - Only register a new value for CSV2 on a valid write to ID_AA64PFR0_EL1
  - Delete even more code in patch #2

Marc Zyngier (3):
  KVM: arm64: Allow setting of ID_AA64PFR0_EL1.CSV2 from userspace
  KVM: arm64: Unify trap handlers injecting an UNDEF
  KVM: arm64: Handle SCXTNUM_ELx traps

 arch/arm64/include/asm/kvm_host.h |   2 +
 arch/arm64/include/asm/sysreg.h   |   4 ++
 arch/arm64/kvm/arm.c              |  16 +++++
 arch/arm64/kvm/sys_regs.c         | 111 ++++++++++++++++++------------
 4 files changed, 89 insertions(+), 44 deletions(-)

-- 
2.28.0


             reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-10 14:13 Marc Zyngier [this message]
2020-11-10 14:13 ` [PATCH v2 1/3] KVM: arm64: Allow setting of ID_AA64PFR0_EL1.CSV2 from userspace Marc Zyngier
2020-11-11 22:01   ` Will Deacon
2020-11-10 14:13 ` [PATCH v2 2/3] KVM: arm64: Unify trap handlers injecting an UNDEF Marc Zyngier
2020-11-11 22:01   ` Will Deacon
2020-11-10 14:13 ` [PATCH v2 3/3] KVM: arm64: Handle SCXTNUM_ELx traps Marc Zyngier

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