Re: [PATCH 1/2] target/s390x: Implement Early Exception Recognition

[David Hildenbrand]

On 14.03.23 12:00, Ilya Leoshkevich wrote:
> Generate specification exception if a reserved bit is set in the PSW
> mask or if the PSW address is out of bounds dictated by the addresing
> mode.
>
> Reported-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>

Unofficially known to be broken (and ignored) for a long time :D

> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
> ---
>   target/s390x/cpu.c             | 26 ++++++++++++++++++++++++++
>   target/s390x/cpu.h             |  1 +
>   target/s390x/tcg/excp_helper.c |  3 ++-
>   3 files changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
> index b10a8541ff8..8e6e46aa3d8 100644
> --- a/target/s390x/cpu.c
> +++ b/target/s390x/cpu.c
> @@ -41,6 +41,26 @@
>   #define CR0_RESET       0xE0UL
>   #define CR14_RESET      0xC2000000UL;
>   
> +#ifndef CONFIG_USER_ONLY
> +static bool is_early_exception_recognized(uint64_t mask, uint64_t addr)

Nit: I'd call this is_early_exception_psw() or sth like that.

Thanks!

Reviewed-by: David Hildenbrand <david@redhat.com>

--
Thanks,

David / dhildenb