diff options
Diffstat (limited to 'hw/ppc/spapr_caps.c')
| -rw-r--r-- | hw/ppc/spapr_caps.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c index c28239ca01..6d6dca30db 100644 --- a/hw/ppc/spapr_caps.c +++ b/hw/ppc/spapr_caps.c @@ -393,9 +393,38 @@ static void cap_nested_kvm_hv_apply(sPAPRMachineState *spapr, static void cap_large_decr_apply(sPAPRMachineState *spapr, uint8_t val, Error **errp) { - if (val) + PowerPCCPU *cpu = POWERPC_CPU(first_cpu); + + if (!val) { + return; /* Disabled by default */ + } + + if (tcg_enabled()) { + if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_00, 0, + spapr->max_compat_pvr)) { + error_setg(errp, + "Large decrementer only supported on POWER9, try -cpu POWER9"); + return; + } + } else { error_setg(errp, "No large decrementer support, try cap-large-decr=off"); + } +} + +static void cap_large_decr_cpu_apply(sPAPRMachineState *spapr, + PowerPCCPU *cpu, + uint8_t val, Error **errp) +{ + CPUPPCState *env = &cpu->env; + target_ulong lpcr = env->spr[SPR_LPCR]; + + if (val) { + lpcr |= LPCR_LD; + } else { + lpcr &= ~LPCR_LD; + } + ppc_store_lpcr(cpu, lpcr); } sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = { @@ -484,6 +513,7 @@ sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = { .set = spapr_cap_set_bool, .type = "bool", .apply = cap_large_decr_apply, + .cpu_apply = cap_large_decr_cpu_apply, }, }; |