tree af775631e0434a9e975e9a9e0ac16419516a1321
parent 1dd3501a9a81daf08762028efcfd9b508d3df2cb
author Alexandru Elisei <alexandru.elisei@arm.com> 1616425600 +0000
committer Andrew Jones <drjones@redhat.com> 1616680565 +0100

arm64: Configure SCTLR_EL1 at boot

Some fields in SCTLR_EL1 are UNKNOWN at reset and the arm64 boot
requirements, as stated by Linux in Documentation/arm64/booting.rst, do not
specify a particular value for all the fields. Do not rely on the good will
of the hypervisor and userspace to set SCTLR_EL1 to a sane value (by their
definition of sane) and set SCTLR_EL1 explicitely before running setup().
This will ensure that all tests are performed with the hardware set up
identically, regardless of the KVM or VMM versions.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>