diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/ppc/kvm.c | 39 | ||||
| -rw-r--r-- | target/ppc/kvm_ppc.h | 12 | ||||
| -rw-r--r-- | target/ppc/translate_init.c | 14 |
3 files changed, 50 insertions, 15 deletions
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c index f1d5410..b6bd0fa 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -74,6 +74,7 @@ static int cap_interrupt_level = false; static int cap_segstate; static int cap_booke_sregs; static int cap_ppc_smt; +static int cap_ppc_smt_possible; static int cap_ppc_rma; static int cap_spapr_tce; static int cap_spapr_tce_64; @@ -130,7 +131,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s) cap_interrupt_level = kvm_check_extension(s, KVM_CAP_PPC_IRQ_LEVEL); cap_segstate = kvm_check_extension(s, KVM_CAP_PPC_SEGSTATE); cap_booke_sregs = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_SREGS); - cap_ppc_smt = kvm_check_extension(s, KVM_CAP_PPC_SMT); + cap_ppc_smt_possible = kvm_check_extension(s, KVM_CAP_PPC_SMT_POSSIBLE); cap_ppc_rma = kvm_check_extension(s, KVM_CAP_PPC_RMA); cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE); cap_spapr_tce_64 = kvm_check_extension(s, KVM_CAP_SPAPR_TCE_64); @@ -144,6 +145,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s) * only activated after this by kvmppc_set_papr() */ cap_htab_fd = kvm_check_extension(s, KVM_CAP_PPC_HTAB_FD); cap_fixup_hcalls = kvm_check_extension(s, KVM_CAP_PPC_FIXUP_HCALL); + cap_ppc_smt = kvm_vm_check_extension(s, KVM_CAP_PPC_SMT); cap_htm = kvm_vm_check_extension(s, KVM_CAP_PPC_HTM); cap_mmu_radix = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_RADIX); cap_mmu_hash_v3 = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_HASH_V3); @@ -2134,6 +2136,41 @@ int kvmppc_smt_threads(void) return cap_ppc_smt ? cap_ppc_smt : 1; } +int kvmppc_set_smt_threads(int smt) +{ + int ret; + + ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_SMT, 0, smt, 0); + if (!ret) { + cap_ppc_smt = smt; + } + return ret; +} + +void kvmppc_hint_smt_possible(Error **errp) +{ + int i; + GString *g; + char *s; + + assert(kvm_enabled()); + if (cap_ppc_smt_possible) { + g = g_string_new("Available VSMT modes:"); + for (i = 63; i >= 0; i--) { + if ((1UL << i) & cap_ppc_smt_possible) { + g_string_append_printf(g, " %lu", (1UL << i)); + } + } + s = g_string_free(g, false); + error_append_hint(errp, "%s.\n", s); + g_free(s); + } else { + error_append_hint(errp, + "This KVM seems to be too old to support VSMT.\n"); + } +} + + #ifdef TARGET_PPC64 off_t kvmppc_alloc_rma(void **rma) { diff --git a/target/ppc/kvm_ppc.h b/target/ppc/kvm_ppc.h index 381afe6..e6711fc 100644 --- a/target/ppc/kvm_ppc.h +++ b/target/ppc/kvm_ppc.h @@ -29,6 +29,8 @@ void kvmppc_set_papr(PowerPCCPU *cpu); int kvmppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr); void kvmppc_set_mpic_proxy(PowerPCCPU *cpu, int mpic_proxy); int kvmppc_smt_threads(void); +void kvmppc_hint_smt_possible(Error **errp); +int kvmppc_set_smt_threads(int smt); int kvmppc_clear_tsr_bits(PowerPCCPU *cpu, uint32_t tsr_bits); int kvmppc_or_tsr_bits(PowerPCCPU *cpu, uint32_t tsr_bits); int kvmppc_set_tcr(PowerPCCPU *cpu); @@ -148,6 +150,16 @@ static inline int kvmppc_smt_threads(void) return 1; } +static inline void kvmppc_hint_smt_possible(Error **errp) +{ + return; +} + +static inline int kvmppc_set_smt_threads(int smt) +{ + return 0; +} + static inline int kvmppc_or_tsr_bits(PowerPCCPU *cpu, uint32_t tsr_bits) { return 0; diff --git a/target/ppc/translate_init.c b/target/ppc/translate_init.c index 08ef74f..703ea12 100644 --- a/target/ppc/translate_init.c +++ b/target/ppc/translate_init.c @@ -9907,20 +9907,6 @@ static void ppc_cpu_realizefn(DeviceState *dev, Error **errp) int max_smt = kvmppc_smt_threads(); #endif -#if !defined(CONFIG_USER_ONLY) - if (smp_threads > max_smt) { - error_setg(errp, "Cannot support more than %d threads on PPC with %s", - max_smt, kvm_enabled() ? "KVM" : "TCG"); - return; - } - if (!is_power_of_2(smp_threads)) { - error_setg(errp, "Cannot support %d threads on PPC with %s, " - "threads count must be a power of 2.", - smp_threads, kvm_enabled() ? "KVM" : "TCG"); - return; - } -#endif - cpu_exec_realizefn(cs, &local_err); if (local_err != NULL) { error_propagate(errp, local_err); |