On Wed, Oct 04, 2017 at 10:48:05AM +0100, Suzuki K Poulose wrote:
> Make sure the MRS emulation is enabled early enough, such that the
> early userspace applications (e.g, those run from initrd) could
> use the facility without crashing them.
>
> Fixes: commit 77c97b4ee2129 ("arm64: cpufeature: Expose CPUID registers by
> emulation")
> Reported-by: Matwey V. Kornilov <[email protected]>
> Cc: James Morse <[email protected]>
> Cc: Dave Martin <[email protected]>
> Cc: Catalin Marinas <[email protected]>
> Cc: Will Deacon <[email protected]>
> Cc: [email protected]
> Cc: Mark Rutland <[email protected]>
> Signed-off-by: Suzuki K Poulose <[email protected]>
This looks sensible, but shouldn't we do the same for other
late_inicalls can affect initrd userspace?
e.g. armv8_deprecated_init, fpsimd_init, sys_reg_genericv8_init?
Thanks,
Mark.
> ---
> arch/arm64/kernel/cpufeature.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> index 9f9e0064c8c1..276eecab6cea 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -1294,4 +1294,4 @@ static int __init enable_mrs_emulation(void)
> return 0;
> }
>
> -late_initcall(enable_mrs_emulation);
> +core_initcall(enable_mrs_emulation);
> --
> 2.13.5
>
