From: Oliver Upton <oliver.upton@linux.dev>
To: kvmarm@lists.cs.columbia.edu
Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
maz@kernel.org, james.morse@arm.com, alexandru.elisei@arm.com,
suzuki.poulose@arm.com, will@kernel.org,
Oliver Upton <oliver.upton@linux.dev>
Subject: [PATCH v2 0/2] KVM: arm64: Uphold 64bit-only behavior on asymmetric systems
Date: Tue, 16 Aug 2022 19:25:52 +0000 [thread overview]
Message-ID: <20220816192554.1455559-1-oliver.upton@linux.dev> (raw)
Small series to fix a couple issues around when 64bit-only behavior is
applied. As KVM is more restrictive than the kernel in terms of 32bit
support (no asymmetry), we really needed our own predicate when the
meaning of system_supports_32bit_el0() changed in commit 2122a833316f
("arm64: Allow mismatched 32-bit EL0 support").
Lightly tested as I do not have any asymmetric systems on hand at the
moment. Attention on patch 2 would be appreciated as it affects ABI.
Applies to 6.0-rc1.
v1 -> v2:
- Fix a silly logic inversion in vcpu_mode_is_bad_32bit()
- Rebase to 6.0-rc1
Oliver Upton (2):
KVM: arm64: Treat PMCR_EL1.LC as RES1 on asymmetric systems
KVM: arm64: Reject 32bit user PSTATE on asymmetric systems
arch/arm64/include/asm/kvm_host.h | 4 ++++
arch/arm64/kvm/arm.c | 3 +--
arch/arm64/kvm/guest.c | 2 +-
arch/arm64/kvm/sys_regs.c | 4 ++--
4 files changed, 8 insertions(+), 5 deletions(-)
base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868
--
2.37.1.595.g718a3a8f04-goog
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next reply other threads:[~2022-08-16 19:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-16 19:25 Oliver Upton [this message]
2022-08-16 19:25 ` [PATCH v2 1/2] KVM: arm64: Treat PMCR_EL1.LC as RES1 on asymmetric systems Oliver Upton
2022-08-16 19:25 ` [PATCH v2 2/2] KVM: arm64: Reject 32bit user PSTATE " Oliver Upton
2022-08-17 9:33 ` [PATCH v2 0/2] KVM: arm64: Uphold 64bit-only behavior " Marc Zyngier
2022-08-17 10:07 ` Marc Zyngier
2022-08-17 10:52 ` Alexandru Elisei
2022-08-17 10:56 ` Marc Zyngier
2022-08-17 15:13 ` Oliver Upton
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