From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Quentin Perret <qperret@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
kvmarm@lists.cs.columbia.edu
Subject: [PATCH 0/5] KVM: arm64: Restrict host hypercalls when pKVM is enabled
Date: Thu, 23 Sep 2021 12:22:51 +0100 [thread overview]
Message-ID: <20210923112256.15767-1-will@kernel.org> (raw)
Hi folks,
This series restricts the hypercalls available to the KVM host on arm64
when pKVM is enabled so that it is not possible for the host to use them
to replace the EL2 component with something else.
This occurs in two stages: when switching to the pKVM vectors, the stub
hypercalls are removed and then later when pKVM is finalised, the pKVM
init hypercalls are removed.
There are still a few dubious calls remaining in terms of protecting the
guest (e.g. __kvm_adjust_pc) but these will be dealt with later when we
have more VM state at EL2 to play with.
Patches based on -rc2. Feedback welcome.
Cheers,
Will
Cc: Marc Zyngier <maz@kernel.org>
Cc: Quentin Perret <qperret@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
--->8
Will Deacon (5):
arm64: Prevent kexec and hibernation if is_protected_kvm_enabled()
KVM: arm64: Reject stub hypercalls after pKVM has been initialised
KVM: arm64: Propagate errors from __pkvm_prot_finalize hypercall
KVM: arm64: Prevent re-finalisation of pKVM for a given CPU
KVM: arm64: Disable privileged hypercalls after pKVM finalisation
arch/arm64/include/asm/kvm_asm.h | 43 ++++++++++---------
arch/arm64/kernel/smp.c | 3 +-
arch/arm64/kvm/arm.c | 61 ++++++++++++++++++---------
arch/arm64/kvm/hyp/nvhe/host.S | 26 ++++++++----
arch/arm64/kvm/hyp/nvhe/hyp-main.c | 26 +++++++-----
arch/arm64/kvm/hyp/nvhe/mem_protect.c | 3 ++
6 files changed, 103 insertions(+), 59 deletions(-)
--
2.33.0.464.g1972c5931b-goog
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next reply other threads:[~2021-09-23 11:25 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-23 11:22 Will Deacon [this message]
2021-09-23 11:22 ` [PATCH 1/5] arm64: Prevent kexec and hibernation if is_protected_kvm_enabled() Will Deacon
2021-09-23 11:45 ` Mark Rutland
2021-09-23 12:29 ` Will Deacon
2021-09-23 11:22 ` [PATCH 2/5] KVM: arm64: Reject stub hypercalls after pKVM has been initialised Will Deacon
2021-09-29 13:37 ` Quentin Perret
2021-09-23 11:22 ` [PATCH 3/5] KVM: arm64: Propagate errors from __pkvm_prot_finalize hypercall Will Deacon
2021-09-29 13:36 ` Quentin Perret
2021-10-05 11:30 ` Will Deacon
2021-09-23 11:22 ` [PATCH 4/5] KVM: arm64: Prevent re-finalisation of pKVM for a given CPU Will Deacon
2021-09-29 13:41 ` Quentin Perret
2021-09-23 11:22 ` [PATCH 5/5] KVM: arm64: Disable privileged hypercalls after pKVM finalisation Will Deacon
2021-09-23 12:56 ` Marc Zyngier
2021-09-23 13:02 ` Will Deacon
2021-09-23 13:11 ` Marc Zyngier
2021-09-23 12:58 ` Will Deacon
2021-09-23 12:21 ` [PATCH 0/5] KVM: arm64: Restrict host hypercalls when pKVM is enabled Marc Zyngier
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