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Marc Zyngier 79e1a7e336 arm64: KVM: Preserve RES1 bits in SCTLR_EL2 commit `d68c1f7fd1` upstream. __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. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@linaro.org> [bwh: Backported to 3.16: - s/ELx/EL2/ - Adjust filename, context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk>	History 2017-09-15 18:30:04 +01:00
..
asm	arm64: KVM: Preserve RES1 bits in SCTLR_EL2	2017-09-15 18:30:04 +01:00
uapi/asm	arm64/ptrace: Avoid uninitialised struct padding in fpr_set()	2017-03-16 02:27:01 +00:00

Marc Zyngier 79e1a7e336 arm64: KVM: Preserve RES1 bits in SCTLR_EL2

commit d68c1f7fd1 upstream.

__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.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
[bwh: Backported to 3.16:
 - s/ELx/EL2/
 - Adjust filename, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

History

2017-09-15 18:30:04 +01:00

asm arm64: KVM: Preserve RES1 bits in SCTLR_EL2 2017-09-15 18:30:04 +01:00

uapi/asm arm64/ptrace: Avoid uninitialised struct padding in fpr_set() 2017-03-16 02:27:01 +00:00