On 2018-10-08 17:32, David Hildenbrand wrote:
> linux-user should always enable AFP, otherwise our emulated binary
> might crash once it tries to make use of additional floating-point
> registers or instructions.
>
> Cc: Peter Maydell <peter.mayd...@linaro.org>
> Cc: Alex Bennée <alex.ben...@linaro.org>
> Fixes: db0504154e ("s390x/tcg: check for AFP-register, BFP and DFP data
> exceptions")
> Reported-by: Alex Bennée <alex.ben...@linaro.org>
> Signed-off-by: David Hildenbrand <da...@redhat.com>
> ---
> target/s390x/cpu.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
> index 8ed4823d6e..18ba7f85a5 100644
> --- a/target/s390x/cpu.c
> +++ b/target/s390x/cpu.c
> @@ -145,6 +145,11 @@ static void s390_cpu_full_reset(CPUState *s)
> env->cregs[0] = CR0_RESET;
> env->cregs[14] = CR14_RESET;
>
> +#if defined(CONFIG_USER_ONLY)
> + /* user mode should always be allowed to use the full FPU */
> + env->cregs[0] |= CR0_AFP;
> +#endif
> +
> /* architectured initial value for Breaking-Event-Address register */
> env->gbea = 1;
>
>
Reviewed-by: Thomas Huth <th...@redhat.com>
