On 04.03.20 12:42, Janosch Frank wrote: > SCLP for a protected guest is done over the SIDAD, so we need to use > the s390_cpu_virt_mem_* functions to access the SIDAD instead of guest
nope :) s390_cpu_pv_mem_* > memory when reading/writing SCBs. > > To not confuse the sclp emulation, we set 0x4000 as the SCCB address, > since the function that injects the sclp external interrupt would > reject a zero sccb address. Please add that as a comment to SCLP_PV_DUMMY_ADDR. > > Signed-off-by: Janosch Frank <[email protected]> > --- > hw/s390x/sclp.c | 17 +++++++++++++++++ > include/hw/s390x/sclp.h | 2 ++ > target/s390x/kvm.c | 5 +++++ > 3 files changed, 24 insertions(+) > > diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c > index af0bfbc2ec..5136f5fcbe 100644 > --- a/hw/s390x/sclp.c > +++ b/hw/s390x/sclp.c > @@ -193,6 +193,23 @@ static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, > uint32_t code) > } > } > > +#define SCLP_PV_DUMMY_ADDR 0x4000 Should we move that to sclp_c->service_interrupt instead and document it properly? Or what about providing a sclp_c->service_interrupt_pv(sclp) that handles this internally? > +int sclp_service_call_protected(CPUS390XState *env, uint64_t sccb, > + uint32_t code) > +{ > + SCLPDevice *sclp = get_sclp_device(); > + SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp); > + SCCB work_sccb; > + hwaddr sccb_len = sizeof(SCCB); > + > + s390_cpu_pv_mem_read(env_archcpu(env), 0, &work_sccb, sccb_len); I assume it's valid to always read the full SCCB length? > + sclp_c->execute(sclp, &work_sccb, code); > + s390_cpu_pv_mem_write(env_archcpu(env), 0, &work_sccb, > + be16_to_cpu(work_sccb.h.length)); > + sclp_c->service_interrupt(sclp, SCLP_PV_DUMMY_ADDR); > + return 0; > +} > + > int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code) > { > SCLPDevice *sclp = get_sclp_device(); > diff --git a/include/hw/s390x/sclp.h b/include/hw/s390x/sclp.h > index c54413b78c..c0a3faa37d 100644 > --- a/include/hw/s390x/sclp.h > +++ b/include/hw/s390x/sclp.h > @@ -217,5 +217,7 @@ void s390_sclp_init(void); > void sclp_service_interrupt(uint32_t sccb); > void raise_irq_cpu_hotplug(void); > int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code); > +int sclp_service_call_protected(CPUS390XState *env, uint64_t sccb, > + uint32_t code); > > #endif > diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c > index 43fc0c088b..a4cbdc5fc6 100644 > --- a/target/s390x/kvm.c > +++ b/target/s390x/kvm.c > @@ -1226,6 +1226,11 @@ static void kvm_sclp_service_call(S390CPU *cpu, struct > kvm_run *run, > sccb = env->regs[ipbh0 & 0xf]; > code = env->regs[(ipbh0 & 0xf0) >> 4]; > > + if (run->s390_sieic.icptcode == ICPT_PV_INSTR) { I still somewhat prefer checking for env->pv instead - similar to patch #9. -- Thanks, David / dhildenb
