diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/ppc/excp_helper.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index 8f810f7..14a4eea 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -747,7 +747,7 @@ static void powerpc_excp_7xx(PowerPCCPU *cpu, int excp) CPUPPCState *env = &cpu->env; int excp_model = env->excp_model; target_ulong msr, new_msr, vector; - int srr0, srr1, lev = -1; + int srr0, srr1; if (excp <= POWERPC_EXCP_NONE || excp >= POWERPC_EXCP_NB) { cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); @@ -860,9 +860,10 @@ static void powerpc_excp_7xx(PowerPCCPU *cpu, int excp) } break; case POWERPC_EXCP_SYSCALL: /* System call exception */ - lev = env->error_code; + { + int lev = env->error_code; - if ((lev == 1) && cpu->vhyp) { + if (lev == 1 && cpu->vhyp) { dump_hcall(env); } else { dump_syscall(env); @@ -874,17 +875,21 @@ static void powerpc_excp_7xx(PowerPCCPU *cpu, int excp) */ env->nip += 4; - /* "PAPR mode" built-in hypercall emulation */ - if ((lev == 1) && cpu->vhyp) { + /* + * The Virtual Open Firmware (VOF) relies on the 'sc 1' + * instruction to communicate with QEMU. The pegasos2 machine + * uses VOF and the 7xx CPUs, so although the 7xx don't have + * HV mode, we need to keep hypercall support. + */ + if (lev == 1 && cpu->vhyp) { PPCVirtualHypervisorClass *vhc = PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); vhc->hypercall(cpu->vhyp, cpu); return; } - if (lev == 1) { - new_msr |= (target_ulong)MSR_HVB; - } + break; + } case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ case POWERPC_EXCP_DECR: /* Decrementer exception */ break; |