From: Zhao Liu <zhao1.liu@xxxxxxxxx> Add "l1d-cache", "l1i-cache". "l2-cache", and "l3-cache" options in -smp to define the cache topology for SMP system. Signed-off-by: Zhao Liu <zhao1.liu@xxxxxxxxx> --- hw/core/machine-smp.c | 128 ++++++++++++++++++++++++++++++++++++++++++ hw/core/machine.c | 4 ++ qapi/machine.json | 14 ++++- system/vl.c | 15 +++++ 4 files changed, 160 insertions(+), 1 deletion(-) diff --git a/hw/core/machine-smp.c b/hw/core/machine-smp.c index 8a8296b0d05b..2cbd19f4aa57 100644 --- a/hw/core/machine-smp.c +++ b/hw/core/machine-smp.c @@ -61,6 +61,132 @@ static char *cpu_hierarchy_to_string(MachineState *ms) return g_string_free(s, false); } +static bool machine_check_topo_support(MachineState *ms, + CPUTopoLevel topo) +{ + MachineClass *mc = MACHINE_GET_CLASS(ms); + + if (topo == CPU_TOPO_LEVEL_MODULE && !mc->smp_props.modules_supported) { + return false; + } + + if (topo == CPU_TOPO_LEVEL_CLUSTER && !mc->smp_props.clusters_supported) { + return false; + } + + if (topo == CPU_TOPO_LEVEL_DIE && !mc->smp_props.dies_supported) { + return false; + } + + if (topo == CPU_TOPO_LEVEL_BOOK && !mc->smp_props.books_supported) { + return false; + } + + if (topo == CPU_TOPO_LEVEL_DRAWER && !mc->smp_props.drawers_supported) { + return false; + } + + return true; +} + +static int smp_cache_string_to_topology(MachineState *ms, + char *topo_str, + CPUTopoLevel *topo, + Error **errp) +{ + *topo = string_to_cpu_topo(topo_str); + + if (*topo == CPU_TOPO_LEVEL_MAX || *topo == CPU_TOPO_LEVEL_INVALID) { + error_setg(errp, "Invalid cache topology level: %s. The cache " + "topology should match the CPU topology level", topo_str); + return -1; + } + + if (!machine_check_topo_support(ms, *topo)) { + error_setg(errp, "Invalid cache topology level: %s. The topology " + "level is not supported by this machine", topo_str); + return -1; + } + + return 0; +} + +static void machine_parse_smp_cache_config(MachineState *ms, + const SMPConfiguration *config, + Error **errp) +{ + MachineClass *mc = MACHINE_GET_CLASS(ms); + + if (config->l1d_cache) { + if (!mc->smp_props.l1_separated_cache_supported) { + error_setg(errp, "L1 D-cache topology not " + "supported by this machine"); + return; + } + + if (smp_cache_string_to_topology(ms, config->l1d_cache, + &ms->smp_cache.l1d, errp)) { + return; + } + } + + if (config->l1i_cache) { + if (!mc->smp_props.l1_separated_cache_supported) { + error_setg(errp, "L1 I-cache topology not " + "supported by this machine"); + return; + } + + if (smp_cache_string_to_topology(ms, config->l1i_cache, + &ms->smp_cache.l1i, errp)) { + return; + } + } + + if (config->l2_cache) { + if (!mc->smp_props.l2_unified_cache_supported) { + error_setg(errp, "L2 cache topology not " + "supported by this machine"); + return; + } + + if (smp_cache_string_to_topology(ms, config->l2_cache, + &ms->smp_cache.l2, errp)) { + return; + } + + if (ms->smp_cache.l1d > ms->smp_cache.l2 || + ms->smp_cache.l1i > ms->smp_cache.l2) { + error_setg(errp, "Invalid L2 cache topology. " + "L2 cache topology level should not be " + "lower than L1 D-cache/L1 I-cache"); + return; + } + } + + if (config->l3_cache) { + if (!mc->smp_props.l2_unified_cache_supported) { + error_setg(errp, "L3 cache topology not " + "supported by this machine"); + return; + } + + if (smp_cache_string_to_topology(ms, config->l3_cache, + &ms->smp_cache.l3, errp)) { + return; + } + + if (ms->smp_cache.l1d > ms->smp_cache.l3 || + ms->smp_cache.l1i > ms->smp_cache.l3 || + ms->smp_cache.l2 > ms->smp_cache.l3) { + error_setg(errp, "Invalid L3 cache topology. " + "L3 cache topology level should not be " + "lower than L1 D-cache/L1 I-cache/L2 cache"); + return; + } + } +} + /* * machine_parse_smp_config: Generic function used to parse the given * SMP configuration @@ -249,6 +375,8 @@ void machine_parse_smp_config(MachineState *ms, mc->name, mc->max_cpus); return; } + + machine_parse_smp_cache_config(ms, config, errp); } unsigned int machine_topo_get_cores_per_socket(const MachineState *ms) diff --git a/hw/core/machine.c b/hw/core/machine.c index 426f71770a84..cb5173927b0d 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -886,6 +886,10 @@ static void machine_get_smp(Object *obj, Visitor *v, const char *name, .has_cores = true, .cores = ms->smp.cores, .has_threads = true, .threads = ms->smp.threads, .has_maxcpus = true, .maxcpus = ms->smp.max_cpus, + .l1d_cache = g_strdup(cpu_topo_to_string(ms->smp_cache.l1d)), + .l1i_cache = g_strdup(cpu_topo_to_string(ms->smp_cache.l1i)), + .l2_cache = g_strdup(cpu_topo_to_string(ms->smp_cache.l2)), + .l3_cache = g_strdup(cpu_topo_to_string(ms->smp_cache.l3)), }; if (!visit_type_SMPConfiguration(v, name, &config, &error_abort)) { diff --git a/qapi/machine.json b/qapi/machine.json index d0e7f1f615f3..0a923ac38803 100644 --- a/qapi/machine.json +++ b/qapi/machine.json @@ -1650,6 +1650,14 @@ # # @threads: number of threads per core # +# @l1d-cache: topology hierarchy of L1 data cache (since 9.0) +# +# @l1i-cache: topology hierarchy of L1 instruction cache (since 9.0) +# +# @l2-cache: topology hierarchy of L2 unified cache (since 9.0) +# +# @l3-cache: topology hierarchy of L3 unified cache (since 9.0) +# # Since: 6.1 ## { 'struct': 'SMPConfiguration', 'data': { @@ -1662,7 +1670,11 @@ '*modules': 'int', '*cores': 'int', '*threads': 'int', - '*maxcpus': 'int' } } + '*maxcpus': 'int', + '*l1d-cache': 'str', + '*l1i-cache': 'str', + '*l2-cache': 'str', + '*l3-cache': 'str' } } ## # @x-query-irq: diff --git a/system/vl.c b/system/vl.c index a82555ae1558..ac95e5ddb656 100644 --- a/system/vl.c +++ b/system/vl.c @@ -741,6 +741,9 @@ static QemuOptsList qemu_smp_opts = { }, { .name = "clusters", .type = QEMU_OPT_NUMBER, + }, { + .name = "modules", + .type = QEMU_OPT_NUMBER, }, { .name = "cores", .type = QEMU_OPT_NUMBER, @@ -750,6 +753,18 @@ static QemuOptsList qemu_smp_opts = { }, { .name = "maxcpus", .type = QEMU_OPT_NUMBER, + }, { + .name = "l1d-cache", + .type = QEMU_OPT_STRING, + }, { + .name = "l1i-cache", + .type = QEMU_OPT_STRING, + }, { + .name = "l2-cache", + .type = QEMU_OPT_STRING, + }, { + .name = "l3-cache", + .type = QEMU_OPT_STRING, }, { /*End of list */ } }, -- 2.34.1