Re: [PATCH 4/4] linux-user: Emulate /proc/cpuinfo on s390x

[Ilya Leoshkevich <iii@linux.ibm.com>]

On Thu, 2023-06-01 at 18:25 +0200, Ilya Leoshkevich wrote:
> Some s390x userspace programs are confused when seeing a foreign
> /proc/cpuinfo [1]. Add the emulation for s390x; follow the respective
> kernel code structure where possible.
> 
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=2211472
> 
> Reported-by: Tulio Magno Quites Machado Filho <tuliom@redhat.com>
> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
> ---
>  linux-user/syscall.c | 106
> ++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 105 insertions(+), 1 deletion(-)

> @@ -8364,7 +8467,8 @@ int do_guest_openat(CPUArchState *cpu_env, int
> dirfd, const char *pathname,
>  #if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
>          { "/proc/net/route", open_net_route, is_proc },
>  #endif
> -#if defined(TARGET_SPARC) || defined(TARGET_HPPA) ||
> defined(TARGET_RISCV)
> +#if defined(TARGET_SPARC) || defined(TARGET_HPPA) || \
> +    defined(TARGET_RISCV) || defined(TARGET_S390X)
>          { "/proc/cpuinfo", open_cpuinfo, is_proc },
>  #endif
>  #if defined(TARGET_M68K)

I'll need to add #if defined(TARGET_S390X) for is_proc, otherwise
the build will fail on s390x hosts. I will include this in v2.