On Mon, Oct 11, 2021 at 11:58:39AM +0100, Alexandru Elisei wrote:
> PMSWINC_EL0 is a write-only register and was initially part of the VCPU
> register state, but was later removed in commit 7a3ba3095a32 ("KVM:
> arm64: Remove PMSWINC_EL0 shadow register"). To prevent regressions, the
> register was kept accessible from userspace as Read-As-Zero (RAZ).
>
> The read function that is used to handle userspace reads of this
> register is get_raz_id_reg(), which, while technically correct, as it
> returns 0, it is not semantically correct, as PMSWINC_EL0 is not an ID
> register as the function name suggests.
>
> Add a new function, get_raz_reg(), to use it as the accessor for
> PMSWINC_EL0, as to not conflate get_raz_id_reg() to handle other types
> of registers.
>
> No functional change intended.
>
> Signed-off-by: Alexandru Elisei <[email protected]>
> ---
> arch/arm64/kvm/sys_regs.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
Reviewed-by: Andrew Jones <[email protected]>
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