| /* |
| * QEMU PowerPC pSeries Logical Partition capabilities handling |
| * |
| * Copyright (c) 2017 David Gibson, Red Hat Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/error-report.h" |
| #include "qapi/error.h" |
| #include "qapi/visitor.h" |
| #include "sysemu/hw_accel.h" |
| #include "exec/ram_addr.h" |
| #include "target/ppc/cpu.h" |
| #include "target/ppc/mmu-hash64.h" |
| #include "cpu-models.h" |
| #include "kvm_ppc.h" |
| #include "migration/vmstate.h" |
| #include "sysemu/tcg.h" |
| |
| #include "hw/ppc/spapr.h" |
| |
| typedef struct SpaprCapPossible { |
| int num; /* size of vals array below */ |
| const char *help; /* help text for vals */ |
| /* |
| * Note: |
| * - because of the way compatibility is determined vals MUST be ordered |
| * such that later options are a superset of all preceding options. |
| * - the order of vals must be preserved, that is their index is important, |
| * however vals may be added to the end of the list so long as the above |
| * point is observed |
| */ |
| const char *vals[]; |
| } SpaprCapPossible; |
| |
| typedef struct SpaprCapabilityInfo { |
| const char *name; |
| const char *description; |
| int index; |
| |
| /* Getter and Setter Function Pointers */ |
| ObjectPropertyAccessor *get; |
| ObjectPropertyAccessor *set; |
| const char *type; |
| /* Possible values if this is a custom string type */ |
| SpaprCapPossible *possible; |
| /* Make sure the virtual hardware can support this capability */ |
| void (*apply)(SpaprMachineState *spapr, uint8_t val, Error **errp); |
| void (*cpu_apply)(SpaprMachineState *spapr, PowerPCCPU *cpu, |
| uint8_t val, Error **errp); |
| bool (*migrate_needed)(void *opaque); |
| } SpaprCapabilityInfo; |
| |
| static void spapr_cap_get_bool(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| SpaprCapabilityInfo *cap = opaque; |
| SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
| bool value = spapr_get_cap(spapr, cap->index) == SPAPR_CAP_ON; |
| |
| visit_type_bool(v, name, &value, errp); |
| } |
| |
| static void spapr_cap_set_bool(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| SpaprCapabilityInfo *cap = opaque; |
| SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
| bool value; |
| |
| if (!visit_type_bool(v, name, &value, errp)) { |
| return; |
| } |
| |
| spapr->cmd_line_caps[cap->index] = true; |
| spapr->eff.caps[cap->index] = value ? SPAPR_CAP_ON : SPAPR_CAP_OFF; |
| } |
| |
| |
| static void spapr_cap_get_string(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| SpaprCapabilityInfo *cap = opaque; |
| SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
| g_autofree char *val = NULL; |
| uint8_t value = spapr_get_cap(spapr, cap->index); |
| |
| if (value >= cap->possible->num) { |
| error_setg(errp, "Invalid value (%d) for cap-%s", value, cap->name); |
| return; |
| } |
| |
| val = g_strdup(cap->possible->vals[value]); |
| |
| visit_type_str(v, name, &val, errp); |
| } |
| |
| static void spapr_cap_set_string(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| SpaprCapabilityInfo *cap = opaque; |
| SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
| uint8_t i; |
| g_autofree char *val = NULL; |
| |
| if (!visit_type_str(v, name, &val, errp)) { |
| return; |
| } |
| |
| if (!strcmp(val, "?")) { |
| error_setg(errp, "%s", cap->possible->help); |
| return; |
| } |
| for (i = 0; i < cap->possible->num; i++) { |
| if (!strcasecmp(val, cap->possible->vals[i])) { |
| spapr->cmd_line_caps[cap->index] = true; |
| spapr->eff.caps[cap->index] = i; |
| return; |
| } |
| } |
| |
| error_setg(errp, "Invalid capability mode \"%s\" for cap-%s", val, |
| cap->name); |
| } |
| |
| static void spapr_cap_get_pagesize(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| SpaprCapabilityInfo *cap = opaque; |
| SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
| uint8_t val = spapr_get_cap(spapr, cap->index); |
| uint64_t pagesize = (1ULL << val); |
| |
| visit_type_size(v, name, &pagesize, errp); |
| } |
| |
| static void spapr_cap_set_pagesize(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| SpaprCapabilityInfo *cap = opaque; |
| SpaprMachineState *spapr = SPAPR_MACHINE(obj); |
| uint64_t pagesize; |
| uint8_t val; |
| |
| if (!visit_type_size(v, name, &pagesize, errp)) { |
| return; |
| } |
| |
| if (!is_power_of_2(pagesize)) { |
| error_setg(errp, "cap-%s must be a power of 2", cap->name); |
| return; |
| } |
| |
| val = ctz64(pagesize); |
| spapr->cmd_line_caps[cap->index] = true; |
| spapr->eff.caps[cap->index] = val; |
| } |
| |
| static void cap_htm_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| if (!val) { |
| /* TODO: We don't support disabling htm yet */ |
| return; |
| } |
| if (tcg_enabled()) { |
| error_setg(errp, "No Transactional Memory support in TCG"); |
| error_append_hint(errp, "Try appending -machine cap-htm=off\n"); |
| } else if (kvm_enabled() && !kvmppc_has_cap_htm()) { |
| error_setg(errp, |
| "KVM implementation does not support Transactional Memory"); |
| error_append_hint(errp, "Try appending -machine cap-htm=off\n"); |
| } |
| } |
| |
| static void cap_vsx_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| CPUPPCState *env = cpu_env(first_cpu); |
| |
| if (!val) { |
| /* TODO: We don't support disabling vsx yet */ |
| return; |
| } |
| /* Allowable CPUs in spapr_cpu_core.c should already have gotten |
| * rid of anything that doesn't do VMX */ |
| g_assert(env->insns_flags & PPC_ALTIVEC); |
| if (!(env->insns_flags2 & PPC2_VSX)) { |
| error_setg(errp, "VSX support not available"); |
| error_append_hint(errp, "Try appending -machine cap-vsx=off\n"); |
| } |
| } |
| |
| static void cap_dfp_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| |
| if (!val) { |
| /* TODO: We don't support disabling dfp yet */ |
| return; |
| } |
| if (!(cpu_env(first_cpu)->insns_flags2 & PPC2_DFP)) { |
| error_setg(errp, "DFP support not available"); |
| error_append_hint(errp, "Try appending -machine cap-dfp=off\n"); |
| } |
| } |
| |
| SpaprCapPossible cap_cfpc_possible = { |
| .num = 3, |
| .vals = {"broken", "workaround", "fixed"}, |
| .help = "broken - no protection, workaround - workaround available," |
| " fixed - fixed in hardware", |
| }; |
| |
| static void cap_safe_cache_apply(SpaprMachineState *spapr, uint8_t val, |
| Error **errp) |
| { |
| ERRP_GUARD(); |
| uint8_t kvm_val = kvmppc_get_cap_safe_cache(); |
| |
| if (tcg_enabled() && val) { |
| /* TCG only supports broken, allow other values and print a warning */ |
| warn_report("TCG doesn't support requested feature, cap-cfpc=%s", |
| cap_cfpc_possible.vals[val]); |
| } else if (kvm_enabled() && (val > kvm_val)) { |
| error_setg(errp, |
| "Requested safe cache capability level not supported by KVM"); |
| error_append_hint(errp, "Try appending -machine cap-cfpc=%s\n", |
| cap_cfpc_possible.vals[kvm_val]); |
| } |
| } |
| |
| SpaprCapPossible cap_sbbc_possible = { |
| .num = 3, |
| .vals = {"broken", "workaround", "fixed"}, |
| .help = "broken - no protection, workaround - workaround available," |
| " fixed - fixed in hardware", |
| }; |
| |
| static void cap_safe_bounds_check_apply(SpaprMachineState *spapr, uint8_t val, |
| Error **errp) |
| { |
| ERRP_GUARD(); |
| uint8_t kvm_val = kvmppc_get_cap_safe_bounds_check(); |
| |
| if (tcg_enabled() && val) { |
| /* TCG only supports broken, allow other values and print a warning */ |
| warn_report("TCG doesn't support requested feature, cap-sbbc=%s", |
| cap_sbbc_possible.vals[val]); |
| } else if (kvm_enabled() && (val > kvm_val)) { |
| error_setg(errp, |
| "Requested safe bounds check capability level not supported by KVM"); |
| error_append_hint(errp, "Try appending -machine cap-sbbc=%s\n", |
| cap_sbbc_possible.vals[kvm_val]); |
| } |
| } |
| |
| SpaprCapPossible cap_ibs_possible = { |
| .num = 5, |
| /* Note workaround only maintained for compatibility */ |
| .vals = {"broken", "workaround", "fixed-ibs", "fixed-ccd", "fixed-na"}, |
| .help = "broken - no protection, workaround - count cache flush" |
| ", fixed-ibs - indirect branch serialisation," |
| " fixed-ccd - cache count disabled," |
| " fixed-na - fixed in hardware (no longer applicable)", |
| }; |
| |
| static void cap_safe_indirect_branch_apply(SpaprMachineState *spapr, |
| uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| uint8_t kvm_val = kvmppc_get_cap_safe_indirect_branch(); |
| |
| if (tcg_enabled() && val) { |
| /* TCG only supports broken, allow other values and print a warning */ |
| warn_report("TCG doesn't support requested feature, cap-ibs=%s", |
| cap_ibs_possible.vals[val]); |
| } else if (kvm_enabled() && (val > kvm_val)) { |
| error_setg(errp, |
| "Requested safe indirect branch capability level not supported by KVM"); |
| error_append_hint(errp, "Try appending -machine cap-ibs=%s\n", |
| cap_ibs_possible.vals[kvm_val]); |
| } |
| } |
| |
| #define VALUE_DESC_TRISTATE " (broken, workaround, fixed)" |
| |
| bool spapr_check_pagesize(SpaprMachineState *spapr, hwaddr pagesize, |
| Error **errp) |
| { |
| hwaddr maxpagesize = (1ULL << spapr->eff.caps[SPAPR_CAP_HPT_MAXPAGESIZE]); |
| |
| if (!kvmppc_hpt_needs_host_contiguous_pages()) { |
| return true; |
| } |
| |
| if (maxpagesize > pagesize) { |
| error_setg(errp, |
| "Can't support %"HWADDR_PRIu" kiB guest pages with %" |
| HWADDR_PRIu" kiB host pages with this KVM implementation", |
| maxpagesize >> 10, pagesize >> 10); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void cap_hpt_maxpagesize_apply(SpaprMachineState *spapr, |
| uint8_t val, Error **errp) |
| { |
| if (val < 12) { |
| error_setg(errp, "Require at least 4kiB hpt-max-page-size"); |
| return; |
| } else if (val < 16) { |
| warn_report("Many guests require at least 64kiB hpt-max-page-size"); |
| } |
| |
| spapr_check_pagesize(spapr, qemu_minrampagesize(), errp); |
| } |
| |
| static bool cap_hpt_maxpagesize_migrate_needed(void *opaque) |
| { |
| return !SPAPR_MACHINE_GET_CLASS(opaque)->pre_4_1_migration; |
| } |
| |
| static bool spapr_pagesize_cb(void *opaque, uint32_t seg_pshift, |
| uint32_t pshift) |
| { |
| unsigned maxshift = *((unsigned *)opaque); |
| |
| assert(pshift >= seg_pshift); |
| |
| /* Don't allow the guest to use pages bigger than the configured |
| * maximum size */ |
| if (pshift > maxshift) { |
| return false; |
| } |
| |
| /* For whatever reason, KVM doesn't allow multiple pagesizes |
| * within a segment, *except* for the case of 16M pages in a 4k or |
| * 64k segment. Always exclude other cases, so that TCG and KVM |
| * guests see a consistent environment */ |
| if ((pshift != seg_pshift) && (pshift != 24)) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void ppc_hash64_filter_pagesizes(PowerPCCPU *cpu, |
| bool (*cb)(void *, uint32_t, uint32_t), |
| void *opaque) |
| { |
| PPCHash64Options *opts = cpu->hash64_opts; |
| int i; |
| int n = 0; |
| bool ci_largepage = false; |
| |
| assert(opts); |
| |
| n = 0; |
| for (i = 0; i < ARRAY_SIZE(opts->sps); i++) { |
| PPCHash64SegmentPageSizes *sps = &opts->sps[i]; |
| int j; |
| int m = 0; |
| |
| assert(n <= i); |
| |
| if (!sps->page_shift) { |
| break; |
| } |
| |
| for (j = 0; j < ARRAY_SIZE(sps->enc); j++) { |
| PPCHash64PageSize *ps = &sps->enc[j]; |
| |
| assert(m <= j); |
| if (!ps->page_shift) { |
| break; |
| } |
| |
| if (cb(opaque, sps->page_shift, ps->page_shift)) { |
| if (ps->page_shift >= 16) { |
| ci_largepage = true; |
| } |
| sps->enc[m++] = *ps; |
| } |
| } |
| |
| /* Clear rest of the row */ |
| for (j = m; j < ARRAY_SIZE(sps->enc); j++) { |
| memset(&sps->enc[j], 0, sizeof(sps->enc[j])); |
| } |
| |
| if (m) { |
| n++; |
| } |
| } |
| |
| /* Clear the rest of the table */ |
| for (i = n; i < ARRAY_SIZE(opts->sps); i++) { |
| memset(&opts->sps[i], 0, sizeof(opts->sps[i])); |
| } |
| |
| if (!ci_largepage) { |
| opts->flags &= ~PPC_HASH64_CI_LARGEPAGE; |
| } |
| } |
| |
| static void cap_hpt_maxpagesize_cpu_apply(SpaprMachineState *spapr, |
| PowerPCCPU *cpu, |
| uint8_t val, Error **errp) |
| { |
| unsigned maxshift = val; |
| |
| ppc_hash64_filter_pagesizes(cpu, spapr_pagesize_cb, &maxshift); |
| } |
| |
| static void cap_nested_kvm_hv_apply(SpaprMachineState *spapr, |
| uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| PowerPCCPU *cpu = POWERPC_CPU(first_cpu); |
| CPUPPCState *env = &cpu->env; |
| |
| if (!val) { |
| /* capability disabled by default */ |
| return; |
| } |
| |
| if (!(env->insns_flags2 & PPC2_ISA300)) { |
| error_setg(errp, "Nested-HV only supported on POWER9 and later"); |
| error_append_hint(errp, "Try appending -machine cap-nested-hv=off\n"); |
| return; |
| } |
| |
| if (kvm_enabled()) { |
| if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_00, 0, |
| spapr->max_compat_pvr)) { |
| error_setg(errp, "Nested-HV only supported on POWER9 and later"); |
| error_append_hint(errp, |
| "Try appending -machine max-cpu-compat=power9\n"); |
| return; |
| } |
| |
| if (!kvmppc_has_cap_nested_kvm_hv()) { |
| error_setg(errp, |
| "KVM implementation does not support Nested-HV"); |
| error_append_hint(errp, |
| "Try appending -machine cap-nested-hv=off\n"); |
| } else if (kvmppc_set_cap_nested_kvm_hv(val) < 0) { |
| error_setg(errp, "Error enabling cap-nested-hv with KVM"); |
| error_append_hint(errp, |
| "Try appending -machine cap-nested-hv=off\n"); |
| } |
| } else if (tcg_enabled()) { |
| MachineState *ms = MACHINE(spapr); |
| unsigned int smp_threads = ms->smp.threads; |
| |
| /* |
| * Nested-HV vCPU env state to L2, so SMT-shared SPR updates, for |
| * example, do not necessarily update the correct SPR value on sibling |
| * threads that are in a different guest/host context. |
| */ |
| if (smp_threads > 1) { |
| error_setg(errp, "TCG does not support nested-HV with SMT"); |
| error_append_hint(errp, "Try appending -machine cap-nested-hv=off " |
| "or use threads=1 with -smp\n"); |
| } |
| if (spapr_nested_api(spapr) && |
| spapr_nested_api(spapr) != NESTED_API_KVM_HV) { |
| error_setg(errp, "Nested-HV APIs are mutually exclusive"); |
| error_append_hint(errp, "Please use either cap-nested-hv or " |
| "cap-nested-papr to proceed.\n"); |
| return; |
| } else { |
| spapr->nested.api = NESTED_API_KVM_HV; |
| } |
| } |
| } |
| |
| static void cap_nested_papr_apply(SpaprMachineState *spapr, |
| uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| PowerPCCPU *cpu = POWERPC_CPU(first_cpu); |
| CPUPPCState *env = &cpu->env; |
| |
| if (!val) { |
| /* capability disabled by default */ |
| return; |
| } |
| |
| if (tcg_enabled()) { |
| if (!(env->insns_flags2 & PPC2_ISA300)) { |
| error_setg(errp, "Nested-PAPR only supported on POWER9 and later"); |
| error_append_hint(errp, |
| "Try appending -machine cap-nested-papr=off\n"); |
| return; |
| } |
| if (spapr_nested_api(spapr) && |
| spapr_nested_api(spapr) != NESTED_API_PAPR) { |
| error_setg(errp, "Nested-HV APIs are mutually exclusive"); |
| error_append_hint(errp, "Please use either cap-nested-hv or " |
| "cap-nested-papr to proceed.\n"); |
| return; |
| } else { |
| spapr->nested.api = NESTED_API_PAPR; |
| } |
| } else if (kvm_enabled()) { |
| error_setg(errp, "KVM implementation does not support Nested-PAPR"); |
| error_append_hint(errp, |
| "Try appending -machine cap-nested-papr=off\n"); |
| } |
| } |
| |
| static void cap_large_decr_apply(SpaprMachineState *spapr, |
| uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| PowerPCCPU *cpu = POWERPC_CPU(first_cpu); |
| PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(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"); |
| error_append_hint(errp, "Try -cpu POWER9\n"); |
| return; |
| } |
| } else if (kvm_enabled()) { |
| int kvm_nr_bits = kvmppc_get_cap_large_decr(); |
| |
| if (!kvm_nr_bits) { |
| error_setg(errp, "No large decrementer support"); |
| error_append_hint(errp, |
| "Try appending -machine cap-large-decr=off\n"); |
| } else if (pcc->lrg_decr_bits != kvm_nr_bits) { |
| error_setg(errp, |
| "KVM large decrementer size (%d) differs to model (%d)", |
| kvm_nr_bits, pcc->lrg_decr_bits); |
| error_append_hint(errp, |
| "Try appending -machine cap-large-decr=off\n"); |
| } |
| } |
| } |
| |
| static void cap_large_decr_cpu_apply(SpaprMachineState *spapr, |
| PowerPCCPU *cpu, |
| uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| CPUPPCState *env = &cpu->env; |
| target_ulong lpcr = env->spr[SPR_LPCR]; |
| |
| if (kvm_enabled()) { |
| if (kvmppc_enable_cap_large_decr(cpu, val)) { |
| error_setg(errp, "No large decrementer support"); |
| error_append_hint(errp, |
| "Try appending -machine cap-large-decr=off\n"); |
| } |
| } |
| |
| if (val) { |
| lpcr |= LPCR_LD; |
| } else { |
| lpcr &= ~LPCR_LD; |
| } |
| ppc_store_lpcr(cpu, lpcr); |
| } |
| |
| static void cap_ccf_assist_apply(SpaprMachineState *spapr, uint8_t val, |
| Error **errp) |
| { |
| ERRP_GUARD(); |
| uint8_t kvm_val = kvmppc_get_cap_count_cache_flush_assist(); |
| |
| if (tcg_enabled() && val) { |
| /* TCG doesn't implement anything here, but allow with a warning */ |
| warn_report("TCG doesn't support requested feature, cap-ccf-assist=on"); |
| } else if (kvm_enabled() && (val > kvm_val)) { |
| uint8_t kvm_ibs = kvmppc_get_cap_safe_indirect_branch(); |
| |
| if (kvm_ibs == SPAPR_CAP_FIXED_CCD) { |
| /* |
| * If we don't have CCF assist on the host, the assist |
| * instruction is a harmless no-op. It won't correctly |
| * implement the cache count flush *but* if we have |
| * count-cache-disabled in the host, that flush is |
| * unnecessary. So, specifically allow this case. This |
| * allows us to have better performance on POWER9 DD2.3, |
| * while still working on POWER9 DD2.2 and POWER8 host |
| * cpus. |
| */ |
| return; |
| } |
| error_setg(errp, |
| "Requested count cache flush assist capability level not supported by KVM"); |
| error_append_hint(errp, "Try appending -machine cap-ccf-assist=off\n"); |
| } |
| } |
| |
| static void cap_fwnmi_apply(SpaprMachineState *spapr, uint8_t val, |
| Error **errp) |
| { |
| ERRP_GUARD(); |
| if (!val) { |
| return; /* Disabled by default */ |
| } |
| |
| if (kvm_enabled()) { |
| if (!kvmppc_get_fwnmi()) { |
| error_setg(errp, |
| "Firmware Assisted Non-Maskable Interrupts(FWNMI) not supported by KVM."); |
| error_append_hint(errp, "Try appending -machine cap-fwnmi=off\n"); |
| } |
| } |
| } |
| |
| static void cap_rpt_invalidate_apply(SpaprMachineState *spapr, |
| uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| |
| if (!val) { |
| /* capability disabled by default */ |
| return; |
| } |
| |
| if (tcg_enabled()) { |
| error_setg(errp, "No H_RPT_INVALIDATE support in TCG"); |
| error_append_hint(errp, |
| "Try appending -machine cap-rpt-invalidate=off\n"); |
| } else if (kvm_enabled()) { |
| if (!kvmppc_has_cap_mmu_radix()) { |
| error_setg(errp, "H_RPT_INVALIDATE only supported on Radix"); |
| return; |
| } |
| |
| if (!kvmppc_has_cap_rpt_invalidate()) { |
| error_setg(errp, |
| "KVM implementation does not support H_RPT_INVALIDATE"); |
| error_append_hint(errp, |
| "Try appending -machine cap-rpt-invalidate=off\n"); |
| } else { |
| kvmppc_enable_h_rpt_invalidate(); |
| } |
| } |
| } |
| |
| static void cap_ail_mode_3_apply(SpaprMachineState *spapr, |
| uint8_t val, Error **errp) |
| { |
| ERRP_GUARD(); |
| PowerPCCPU *cpu = POWERPC_CPU(first_cpu); |
| PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); |
| |
| if (!val) { |
| return; |
| } |
| |
| if (tcg_enabled()) { |
| /* AIL-3 is only supported on POWER8 and above CPUs. */ |
| if (!(pcc->insns_flags2 & PPC2_ISA207S)) { |
| error_setg(errp, "TCG only supports cap-ail-mode-3 on POWER8 and later CPUs"); |
| error_append_hint(errp, "Try appending -machine cap-ail-mode-3=off\n"); |
| return; |
| } |
| } else if (kvm_enabled()) { |
| if (!kvmppc_supports_ail_3()) { |
| error_setg(errp, "KVM implementation does not support cap-ail-mode-3"); |
| error_append_hint(errp, "Try appending -machine cap-ail-mode-3=off\n"); |
| return; |
| } |
| } |
| } |
| |
| SpaprCapabilityInfo capability_table[SPAPR_CAP_NUM] = { |
| [SPAPR_CAP_HTM] = { |
| .name = "htm", |
| .description = "Allow Hardware Transactional Memory (HTM)", |
| .index = SPAPR_CAP_HTM, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_htm_apply, |
| }, |
| [SPAPR_CAP_VSX] = { |
| .name = "vsx", |
| .description = "Allow Vector Scalar Extensions (VSX)", |
| .index = SPAPR_CAP_VSX, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_vsx_apply, |
| }, |
| [SPAPR_CAP_DFP] = { |
| .name = "dfp", |
| .description = "Allow Decimal Floating Point (DFP)", |
| .index = SPAPR_CAP_DFP, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_dfp_apply, |
| }, |
| [SPAPR_CAP_CFPC] = { |
| .name = "cfpc", |
| .description = "Cache Flush on Privilege Change" VALUE_DESC_TRISTATE, |
| .index = SPAPR_CAP_CFPC, |
| .get = spapr_cap_get_string, |
| .set = spapr_cap_set_string, |
| .type = "string", |
| .possible = &cap_cfpc_possible, |
| .apply = cap_safe_cache_apply, |
| }, |
| [SPAPR_CAP_SBBC] = { |
| .name = "sbbc", |
| .description = "Speculation Barrier Bounds Checking" VALUE_DESC_TRISTATE, |
| .index = SPAPR_CAP_SBBC, |
| .get = spapr_cap_get_string, |
| .set = spapr_cap_set_string, |
| .type = "string", |
| .possible = &cap_sbbc_possible, |
| .apply = cap_safe_bounds_check_apply, |
| }, |
| [SPAPR_CAP_IBS] = { |
| .name = "ibs", |
| .description = |
| "Indirect Branch Speculation (broken, workaround, fixed-ibs," |
| "fixed-ccd, fixed-na)", |
| .index = SPAPR_CAP_IBS, |
| .get = spapr_cap_get_string, |
| .set = spapr_cap_set_string, |
| .type = "string", |
| .possible = &cap_ibs_possible, |
| .apply = cap_safe_indirect_branch_apply, |
| }, |
| [SPAPR_CAP_HPT_MAXPAGESIZE] = { |
| .name = "hpt-max-page-size", |
| .description = "Maximum page size for Hash Page Table guests", |
| .index = SPAPR_CAP_HPT_MAXPAGESIZE, |
| .get = spapr_cap_get_pagesize, |
| .set = spapr_cap_set_pagesize, |
| .type = "int", |
| .apply = cap_hpt_maxpagesize_apply, |
| .cpu_apply = cap_hpt_maxpagesize_cpu_apply, |
| .migrate_needed = cap_hpt_maxpagesize_migrate_needed, |
| }, |
| [SPAPR_CAP_NESTED_KVM_HV] = { |
| .name = "nested-hv", |
| .description = "Allow Nested KVM-HV", |
| .index = SPAPR_CAP_NESTED_KVM_HV, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_nested_kvm_hv_apply, |
| }, |
| [SPAPR_CAP_NESTED_PAPR] = { |
| .name = "nested-papr", |
| .description = "Allow Nested HV (PAPR API)", |
| .index = SPAPR_CAP_NESTED_PAPR, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_nested_papr_apply, |
| }, |
| [SPAPR_CAP_LARGE_DECREMENTER] = { |
| .name = "large-decr", |
| .description = "Allow Large Decrementer", |
| .index = SPAPR_CAP_LARGE_DECREMENTER, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_large_decr_apply, |
| .cpu_apply = cap_large_decr_cpu_apply, |
| }, |
| [SPAPR_CAP_CCF_ASSIST] = { |
| .name = "ccf-assist", |
| .description = "Count Cache Flush Assist via HW Instruction", |
| .index = SPAPR_CAP_CCF_ASSIST, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_ccf_assist_apply, |
| }, |
| [SPAPR_CAP_FWNMI] = { |
| .name = "fwnmi", |
| .description = "Implements PAPR FWNMI option", |
| .index = SPAPR_CAP_FWNMI, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_fwnmi_apply, |
| }, |
| [SPAPR_CAP_RPT_INVALIDATE] = { |
| .name = "rpt-invalidate", |
| .description = "Allow H_RPT_INVALIDATE", |
| .index = SPAPR_CAP_RPT_INVALIDATE, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_rpt_invalidate_apply, |
| }, |
| [SPAPR_CAP_AIL_MODE_3] = { |
| .name = "ail-mode-3", |
| .description = "Alternate Interrupt Location (AIL) mode 3 support", |
| .index = SPAPR_CAP_AIL_MODE_3, |
| .get = spapr_cap_get_bool, |
| .set = spapr_cap_set_bool, |
| .type = "bool", |
| .apply = cap_ail_mode_3_apply, |
| }, |
| }; |
| |
| static SpaprCapabilities default_caps_with_cpu(SpaprMachineState *spapr, |
| const char *cputype) |
| { |
| SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr); |
| SpaprCapabilities caps; |
| |
| caps = smc->default_caps; |
| |
| if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_3_00, |
| 0, spapr->max_compat_pvr)) { |
| caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = SPAPR_CAP_OFF; |
| } |
| |
| if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_07, |
| 0, spapr->max_compat_pvr)) { |
| caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF; |
| caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN; |
| caps.caps[SPAPR_CAP_AIL_MODE_3] = SPAPR_CAP_OFF; |
| } |
| |
| if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06_PLUS, |
| 0, spapr->max_compat_pvr)) { |
| caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN; |
| } |
| |
| if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06, |
| 0, spapr->max_compat_pvr)) { |
| caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_OFF; |
| caps.caps[SPAPR_CAP_DFP] = SPAPR_CAP_OFF; |
| caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; |
| } |
| |
| /* This is for pseries-2.12 and older */ |
| if (smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] == 0) { |
| uint8_t mps; |
| |
| if (kvmppc_hpt_needs_host_contiguous_pages()) { |
| mps = ctz64(qemu_minrampagesize()); |
| } else { |
| mps = 34; /* allow everything up to 16GiB, i.e. everything */ |
| } |
| |
| caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = mps; |
| } |
| |
| return caps; |
| } |
| |
| int spapr_caps_pre_load(void *opaque) |
| { |
| SpaprMachineState *spapr = opaque; |
| |
| /* Set to default so we can tell if this came in with the migration */ |
| spapr->mig = spapr->def; |
| return 0; |
| } |
| |
| int spapr_caps_pre_save(void *opaque) |
| { |
| SpaprMachineState *spapr = opaque; |
| |
| spapr->mig = spapr->eff; |
| return 0; |
| } |
| |
| /* This has to be called from the top-level spapr post_load, not the |
| * caps specific one. Otherwise it wouldn't be called when the source |
| * caps are all defaults, which could still conflict with overridden |
| * caps on the destination */ |
| int spapr_caps_post_migration(SpaprMachineState *spapr) |
| { |
| int i; |
| bool ok = true; |
| SpaprCapabilities dstcaps = spapr->eff; |
| SpaprCapabilities srccaps; |
| |
| srccaps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); |
| for (i = 0; i < SPAPR_CAP_NUM; i++) { |
| /* If not default value then assume came in with the migration */ |
| if (spapr->mig.caps[i] != spapr->def.caps[i]) { |
| srccaps.caps[i] = spapr->mig.caps[i]; |
| } |
| } |
| |
| for (i = 0; i < SPAPR_CAP_NUM; i++) { |
| SpaprCapabilityInfo *info = &capability_table[i]; |
| |
| if (srccaps.caps[i] > dstcaps.caps[i]) { |
| error_report("cap-%s higher level (%d) in incoming stream than on destination (%d)", |
| info->name, srccaps.caps[i], dstcaps.caps[i]); |
| ok = false; |
| } |
| |
| if (srccaps.caps[i] < dstcaps.caps[i]) { |
| warn_report("cap-%s lower level (%d) in incoming stream than on destination (%d)", |
| info->name, srccaps.caps[i], dstcaps.caps[i]); |
| } |
| } |
| |
| return ok ? 0 : -EINVAL; |
| } |
| |
| /* Used to generate the migration field and needed function for a spapr cap */ |
| #define SPAPR_CAP_MIG_STATE(sname, cap) \ |
| static bool spapr_cap_##sname##_needed(void *opaque) \ |
| { \ |
| SpaprMachineState *spapr = opaque; \ |
| bool (*needed)(void *opaque) = \ |
| capability_table[cap].migrate_needed; \ |
| \ |
| return needed ? needed(opaque) : true && \ |
| spapr->cmd_line_caps[cap] && \ |
| (spapr->eff.caps[cap] != \ |
| spapr->def.caps[cap]); \ |
| } \ |
| \ |
| const VMStateDescription vmstate_spapr_cap_##sname = { \ |
| .name = "spapr/cap/" #sname, \ |
| .version_id = 1, \ |
| .minimum_version_id = 1, \ |
| .needed = spapr_cap_##sname##_needed, \ |
| .fields = (const VMStateField[]) { \ |
| VMSTATE_UINT8(mig.caps[cap], \ |
| SpaprMachineState), \ |
| VMSTATE_END_OF_LIST() \ |
| }, \ |
| } |
| |
| SPAPR_CAP_MIG_STATE(htm, SPAPR_CAP_HTM); |
| SPAPR_CAP_MIG_STATE(vsx, SPAPR_CAP_VSX); |
| SPAPR_CAP_MIG_STATE(dfp, SPAPR_CAP_DFP); |
| SPAPR_CAP_MIG_STATE(cfpc, SPAPR_CAP_CFPC); |
| SPAPR_CAP_MIG_STATE(sbbc, SPAPR_CAP_SBBC); |
| SPAPR_CAP_MIG_STATE(ibs, SPAPR_CAP_IBS); |
| SPAPR_CAP_MIG_STATE(hpt_maxpagesize, SPAPR_CAP_HPT_MAXPAGESIZE); |
| SPAPR_CAP_MIG_STATE(nested_kvm_hv, SPAPR_CAP_NESTED_KVM_HV); |
| SPAPR_CAP_MIG_STATE(nested_papr, SPAPR_CAP_NESTED_PAPR); |
| SPAPR_CAP_MIG_STATE(large_decr, SPAPR_CAP_LARGE_DECREMENTER); |
| SPAPR_CAP_MIG_STATE(ccf_assist, SPAPR_CAP_CCF_ASSIST); |
| SPAPR_CAP_MIG_STATE(fwnmi, SPAPR_CAP_FWNMI); |
| SPAPR_CAP_MIG_STATE(rpt_invalidate, SPAPR_CAP_RPT_INVALIDATE); |
| SPAPR_CAP_MIG_STATE(ail_mode_3, SPAPR_CAP_AIL_MODE_3); |
| |
| void spapr_caps_init(SpaprMachineState *spapr) |
| { |
| SpaprCapabilities default_caps; |
| int i; |
| |
| /* Compute the actual set of caps we should run with */ |
| default_caps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); |
| |
| for (i = 0; i < SPAPR_CAP_NUM; i++) { |
| /* Store the defaults */ |
| spapr->def.caps[i] = default_caps.caps[i]; |
| /* If not set on the command line then apply the default value */ |
| if (!spapr->cmd_line_caps[i]) { |
| spapr->eff.caps[i] = default_caps.caps[i]; |
| } |
| } |
| } |
| |
| void spapr_caps_apply(SpaprMachineState *spapr) |
| { |
| int i; |
| |
| for (i = 0; i < SPAPR_CAP_NUM; i++) { |
| SpaprCapabilityInfo *info = &capability_table[i]; |
| |
| /* |
| * If the apply function can't set the desired level and thinks it's |
| * fatal, it should cause that. |
| */ |
| info->apply(spapr, spapr->eff.caps[i], &error_fatal); |
| } |
| } |
| |
| void spapr_caps_cpu_apply(SpaprMachineState *spapr, PowerPCCPU *cpu) |
| { |
| int i; |
| |
| for (i = 0; i < SPAPR_CAP_NUM; i++) { |
| SpaprCapabilityInfo *info = &capability_table[i]; |
| |
| /* |
| * If the apply function can't set the desired level and thinks it's |
| * fatal, it should cause that. |
| */ |
| if (info->cpu_apply) { |
| info->cpu_apply(spapr, cpu, spapr->eff.caps[i], &error_fatal); |
| } |
| } |
| } |
| |
| void spapr_caps_add_properties(SpaprMachineClass *smc) |
| { |
| ObjectClass *klass = OBJECT_CLASS(smc); |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(capability_table); i++) { |
| SpaprCapabilityInfo *cap = &capability_table[i]; |
| g_autofree char *name = g_strdup_printf("cap-%s", cap->name); |
| g_autofree char *desc = g_strdup_printf("%s", cap->description); |
| |
| object_class_property_add(klass, name, cap->type, |
| cap->get, cap->set, |
| NULL, cap); |
| |
| object_class_property_set_description(klass, name, desc); |
| } |
| } |
