KVM: arm64: Initialise hypervisor copies of host symbols unconditionally

KVM: arm64: Initialise hypervisor copies of host symbols unconditionally

[ Upstream commit 6c165223e9a6384aa1e934b90f2650e71adb972a ]

The nVHE object at EL2 maintains its own copies of some host variables
so that, when pKVM is enabled, the host cannot directly modify the
hypervisor state. When running in normal nVHE mode, however, these
variables are still mirrored at EL2 but are not initialised.

Initialise the hypervisor symbols from the host copies regardless of
pKVM, ensuring that any reference to this data at EL2 with normal nVHE
will return a sensibly initialised value.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221110190259.26861-16-will@kernel.org
Stable-dep-of: e81625218bf7 ("KVM: arm64: Advertise ID_AA64PFR0_EL1.CSV2/3 to protected VMs")
Signed-off-by: Sasha Levin <sashal@kernel.org>