Re: [Qemu-devel] [PATCH v2 30/30] target/s390x: special handling when starting a CPU with WAIT PSW

[Richard Henderson]

On 09/28/2017 04:37 PM, David Hildenbrand wrote:
> When we try to start a CPU with a WAIT PSW, we have to take care that
> TCG will actually try to continue executing instructions.
> 
> We must therefore really only unhalt the CPU if we don't have a WAIT
> PSW. Also document the special order for restart interrupts, which
> load a new PSW and change the state to operating.
> 
> To keep KVM working, simply don't have a look at the WAIT bit when
> loading the PSW. Otherwise the behavior of a restart interrupt when
> a CPU stopped would be changed.
> 
> Signed-off-by: David Hildenbrand <address@hidden>
> ---
>  target/s390x/cpu.c  | 11 +++++++++--
>  target/s390x/sigp.c |  6 +++++-
>  2 files changed, 14 insertions(+), 3 deletions(-)

Reviewed-by: Richard Henderson <address@hidden>


r~