| Message ID | 20191129094809.26684-12-frankja@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | s390x: Protected Virtualization support | expand |
On 29.11.19 10:48, Janosch Frank wrote: > For protected guests the IPIB is written/read to/from the satellite > block, so we need to make those accesses virtual to make them go > through KVM mem ops. same comment regarding virt mem access. IMHO, the KVM mem ops should return a hard error in case we're in pv mode. > > Signed-off-by: Janosch Frank <frankja@linux.ibm.com> > --- > target/s390x/diag.c | 26 +++++++++++++++++++++++--- > 1 file changed, 23 insertions(+), 3 deletions(-) > > diff --git a/target/s390x/diag.c b/target/s390x/diag.c > index 5489fc721a..6d78759151 100644 > --- a/target/s390x/diag.c > +++ b/target/s390x/diag.c > @@ -88,6 +88,7 @@ static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr, > void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) > { > CPUState *cs = env_cpu(env); > + S390CPU *cpu = S390_CPU(cs); > uint64_t addr = env->regs[r1]; > uint64_t subcode = env->regs[r3]; > IplParameterBlock *iplb; > @@ -118,14 +119,27 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) > if (diag308_parm_check(env, r1, addr, ra, false)) { > return; > } > + > iplb = g_new0(IplParameterBlock, 1); > - cpu_physical_memory_read(addr, iplb, sizeof(iplb->len)); > + if (!env->pv) { > + cpu_physical_memory_read(addr, iplb, sizeof(iplb->len)); > + } else { > + s390_cpu_virt_mem_read(cpu, 0, 0, iplb, sizeof(iplb->len)); > + s390_cpu_virt_mem_handle_exc(cpu, ra); > + } > + > if (!iplb_valid_len(iplb)) { > env->regs[r1 + 1] = DIAG_308_RC_INVALID; > goto out; > } > > - cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); > + if (!env->pv) { > + cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); > + } else { > + s390_cpu_virt_mem_read(cpu, 0, 0, iplb, be32_to_cpu(iplb->len)); > + s390_cpu_virt_mem_handle_exc(cpu, ra); > + } > + > > if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb) && > !(iplb_valid_se(iplb) && s390_ipl_pv_check_comp(iplb) >= 0)) { > @@ -149,7 +163,13 @@ out: > iplb = s390_ipl_get_iplb(); > } > if (iplb) { > - cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); > + if (!env->pv) { > + cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); > + } else { > + s390_cpu_virt_mem_write(cpu, 0, 0, iplb, > + be32_to_cpu(iplb->len)); > + s390_cpu_virt_mem_handle_exc(cpu, ra); ... exactly due to this handling where we actually can't have exceptions, I don't like reusing this infrastructure/interface.
diff --git a/target/s390x/diag.c b/target/s390x/diag.c index 5489fc721a..6d78759151 100644 --- a/target/s390x/diag.c +++ b/target/s390x/diag.c @@ -88,6 +88,7 @@ static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr, void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) { CPUState *cs = env_cpu(env); + S390CPU *cpu = S390_CPU(cs); uint64_t addr = env->regs[r1]; uint64_t subcode = env->regs[r3]; IplParameterBlock *iplb; @@ -118,14 +119,27 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) if (diag308_parm_check(env, r1, addr, ra, false)) { return; } + iplb = g_new0(IplParameterBlock, 1); - cpu_physical_memory_read(addr, iplb, sizeof(iplb->len)); + if (!env->pv) { + cpu_physical_memory_read(addr, iplb, sizeof(iplb->len)); + } else { + s390_cpu_virt_mem_read(cpu, 0, 0, iplb, sizeof(iplb->len)); + s390_cpu_virt_mem_handle_exc(cpu, ra); + } + if (!iplb_valid_len(iplb)) { env->regs[r1 + 1] = DIAG_308_RC_INVALID; goto out; } - cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); + if (!env->pv) { + cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); + } else { + s390_cpu_virt_mem_read(cpu, 0, 0, iplb, be32_to_cpu(iplb->len)); + s390_cpu_virt_mem_handle_exc(cpu, ra); + } + if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb) && !(iplb_valid_se(iplb) && s390_ipl_pv_check_comp(iplb) >= 0)) { @@ -149,7 +163,13 @@ out: iplb = s390_ipl_get_iplb(); } if (iplb) { - cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); + if (!env->pv) { + cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); + } else { + s390_cpu_virt_mem_write(cpu, 0, 0, iplb, + be32_to_cpu(iplb->len)); + s390_cpu_virt_mem_handle_exc(cpu, ra); + } env->regs[r1 + 1] = DIAG_308_RC_OK; } else { env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
For protected guests the IPIB is written/read to/from the satellite block, so we need to make those accesses virtual to make them go through KVM mem ops. Signed-off-by: Janosch Frank <frankja@linux.ibm.com> --- target/s390x/diag.c | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-)