Re: [PATCH v9 07/15] s390x: protvirt: Move STSI data over SIDAD

[Christian Borntraeger]

On 11.03.20 14:21, Janosch Frank wrote:
> For protected guests, we need to put the STSI emulation results into
> the SIDA, so SIE will write them into the guest at the next entry.
> 
> Signed-off-by: Janosch Frank <fran...@linux.ibm.com>
> Reviewed-by: David Hildenbrand <da...@redhat.com>
> ---
>  target/s390x/kvm.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
> index cdcd538b4f7fb318..8085d5030e7c6454 100644
> --- a/target/s390x/kvm.c
> +++ b/target/s390x/kvm.c
> @@ -50,6 +50,7 @@
>  #include "exec/memattrs.h"
>  #include "hw/s390x/s390-virtio-ccw.h"
>  #include "hw/s390x/s390-virtio-hcall.h"
> +#include "hw/s390x/pv.h"
>  
>  #ifndef DEBUG_KVM
>  #define DEBUG_KVM  0
> @@ -1800,7 +1801,9 @@ static void insert_stsi_3_2_2(S390CPU *cpu, __u64 addr, 
> uint8_t ar)
>      SysIB_322 sysib;
>      int del;
>  
> -    if (s390_cpu_virt_mem_read(cpu, addr, ar, &sysib, sizeof(sysib))) {
> +    if (s390_is_pv()) {
> +        s390_cpu_pv_mem_read(cpu, 0, &sysib, sizeof(sysib));

Not strictly necessary, but do we also want to do an early exit if the pv case 
fails?