[PATCH 0/3] KVM/arm64 fixes for AArch32 handling

From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, kvm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Cc: Nina Schoetterl-Glausch <nsg@linux.ibm.com>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Oliver Upton <oliver.upton@linux.dev>,
	Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH 0/3] KVM/arm64 fixes for AArch32 handling
Date: Fri, 24 May 2024 15:19:53 +0100	[thread overview]
Message-ID: <20240524141956.1450304-1-maz@kernel.org> (raw)

The (very much unloved) AArch32 handling has recently been found
lacking in a number of ways:

- Nina spotted a brown paper-bag quality bug in the register narrowing
  code when writing one of the core registers (GPRs, PSTATE) from
  userspace

- We never allowed System mode to be restored. Nobody ever complained,
  but this is wrong nonetheless

- The handling of traps failing their condition check went from dodgy
  to outright broken when the handling of ESR_EL2 was upgraded from 32
  to 64 bit (patch already posted).

All these are stable material, and I plan to merge them after -rc1
is released.

        M.

Marc Zyngier (3):
  KVM: arm64: Fix AArch32 register narrowing on userspace write
  KVM: arm64: Allow AArch32 PSTATE.M to be restored as System mode
  KVM: arm64: AArch32: Fix spurious trapping of conditional instructions

 arch/arm64/kvm/guest.c       |  3 ++-
 arch/arm64/kvm/hyp/aarch32.c | 18 ++++++++++++++++--
 2 files changed, 18 insertions(+), 3 deletions(-)

-- 
2.39.2

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