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(parent: d6dbdd3) | patch
arm64: KVM: Preserve RES1 bits in SCTLR_EL2
authorMarc Zyngier <marc.zyngier@arm.com>
Tue, 6 Jun 2017 18:08:33 +0000 (19:08 +0100)
committerChristoffer Dall <cdall@linaro.org>
Tue, 6 Jun 2017 20:20:02 +0000 (22:20 +0200)
commitd68c1f7fd1b7148dab5fe658321d511998969f2d
treedad8985ff69023999b33a51382598d5627daa292tree | snapshot
parentd6dbdd3c8558cad3b6d74cc357b408622d122331commit | diff
arm64: KVM: Preserve RES1 bits in SCTLR_EL2

__do_hyp_init has the rather bad habit of ignoring RES1 bits and
writing them back as zero. On a v8.0-8.2 CPU, this doesn't do anything
bad, but may end-up being pretty nasty on future revisions of the
architecture.

Let's preserve those bits so that we don't have to fix this later on.

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
arch/arm64/include/asm/sysreg.h diff | blob | history
arch/arm64/kvm/hyp-init.S diff | blob | history
Domain: System / Kernel; Licenses: GPL-2.0;