linux-kernel - [PATCH 0/2] Unify non-VHE ASLR features behind CONFIG_RANDOMIZE

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Message-Id: <20200721094445.82184-1-dbrazdil@google.com>
Date:   Tue, 21 Jul 2020 10:44:43 +0100
From:   David Brazdil <dbrazdil@...gle.com>
To:     Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>
Cc:     kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, android-kvm@...gle.com,
        kernel-team@...roid.com, David Brazdil <dbrazdil@...gle.com>
Subject: [PATCH 0/2] Unify non-VHE ASLR features behind CONFIG_RANDOMIZE_BASE

There is currently no way to disable nVHE ASLR, e.g. for debugging, so the
first patch in this series makes it conditional on RANDOMIZE_BASE, same as
KASLR. Note that the 'nokaslr' command line flag has no effect here.

Second patch unifies the HARDEN_EL2_VECTORS errate for A57 and A72 behind
the same Kconfig for simplicity. Happy to make it just depend on
RANDOMIZE_BASE if having an option to keep randomization on but hardenning
off is preferred.

David Brazdil (2):
  KVM: arm64: Make nVHE ASLR conditional on RANDOMIZE_BASE
  KVM: arm64: Substitute RANDOMIZE_BASE for HARDEN_EL2_VECTORS

 arch/arm64/Kconfig             | 16 ----------------
 arch/arm64/include/asm/mmu.h   |  6 ++----
 arch/arm64/kernel/cpu_errata.c |  4 ++--
 arch/arm64/kvm/Kconfig         |  2 +-
 arch/arm64/kvm/va_layout.c     |  2 +-
 5 files changed, 6 insertions(+), 24 deletions(-)

-- 
2.27.0