diff options
| -rw-r--r-- | qemu-options.hx | 4 | ||||
| -rw-r--r-- | vl.c | 122 |
2 files changed, 71 insertions, 55 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index ca6fdf6134..137a39b7ad 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -73,7 +73,7 @@ Select CPU model (@code{-cpu help} for list and additional feature selection) ETEXI DEF("smp", HAS_ARG, QEMU_OPTION_smp, - "-smp n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]\n" + "-smp [cpus=]n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]\n" " set the number of CPUs to 'n' [default=1]\n" " maxcpus= maximum number of total cpus, including\n" " offline CPUs for hotplug, etc\n" @@ -82,7 +82,7 @@ DEF("smp", HAS_ARG, QEMU_OPTION_smp, " sockets= number of discrete sockets in the system\n", QEMU_ARCH_ALL) STEXI -@item -smp @var{n}[,cores=@var{cores}][,threads=@var{threads}][,sockets=@var{sockets}][,maxcpus=@var{maxcpus}] +@item -smp [cpus=]@var{n}[,cores=@var{cores}][,threads=@var{threads}][,sockets=@var{sockets}][,maxcpus=@var{maxcpus}] @findex -smp Simulate an SMP system with @var{n} CPUs. On the PC target, up to 255 CPUs are supported. On Sparc32 target, Linux limits the number of usable CPUs @@ -1401,48 +1401,79 @@ static void numa_add(const char *optarg) } } -static void smp_parse(const char *optarg) +static QemuOptsList qemu_smp_opts = { + .name = "smp-opts", + .implied_opt_name = "cpus", + .merge_lists = true, + .head = QTAILQ_HEAD_INITIALIZER(qemu_smp_opts.head), + .desc = { + { + .name = "cpus", + .type = QEMU_OPT_NUMBER, + }, { + .name = "sockets", + .type = QEMU_OPT_NUMBER, + }, { + .name = "cores", + .type = QEMU_OPT_NUMBER, + }, { + .name = "threads", + .type = QEMU_OPT_NUMBER, + }, { + .name = "maxcpus", + .type = QEMU_OPT_NUMBER, + }, + { /*End of list */ } + }, +}; + +static void smp_parse(QemuOpts *opts) { - int smp, sockets = 0, threads = 0, cores = 0; - char *endptr; - char option[128]; + if (opts) { - smp = strtoul(optarg, &endptr, 10); - if (endptr != optarg) { - if (*endptr == ',') { - endptr++; - } - } - if (get_param_value(option, 128, "sockets", endptr) != 0) - sockets = strtoull(option, NULL, 10); - if (get_param_value(option, 128, "cores", endptr) != 0) - cores = strtoull(option, NULL, 10); - if (get_param_value(option, 128, "threads", endptr) != 0) - threads = strtoull(option, NULL, 10); - if (get_param_value(option, 128, "maxcpus", endptr) != 0) - max_cpus = strtoull(option, NULL, 10); - - /* compute missing values, prefer sockets over cores over threads */ - if (smp == 0 || sockets == 0) { - sockets = sockets > 0 ? sockets : 1; - cores = cores > 0 ? cores : 1; - threads = threads > 0 ? threads : 1; - if (smp == 0) { - smp = cores * threads * sockets; - } - } else { - if (cores == 0) { + unsigned cpus = qemu_opt_get_number(opts, "cpus", 0); + unsigned sockets = qemu_opt_get_number(opts, "sockets", 0); + unsigned cores = qemu_opt_get_number(opts, "cores", 0); + unsigned threads = qemu_opt_get_number(opts, "threads", 0); + + /* compute missing values, prefer sockets over cores over threads */ + if (cpus == 0 || sockets == 0) { + sockets = sockets > 0 ? sockets : 1; + cores = cores > 0 ? cores : 1; threads = threads > 0 ? threads : 1; - cores = smp / (sockets * threads); + if (cpus == 0) { + cpus = cores * threads * sockets; + } } else { - threads = smp / (cores * sockets); + if (cores == 0) { + threads = threads > 0 ? threads : 1; + cores = cpus / (sockets * threads); + } else { + threads = cpus / (cores * sockets); + } } + + max_cpus = qemu_opt_get_number(opts, "maxcpus", 0); + + smp_cpus = cpus; + smp_cores = cores > 0 ? cores : 1; + smp_threads = threads > 0 ? threads : 1; + } - smp_cpus = smp; - smp_cores = cores > 0 ? cores : 1; - smp_threads = threads > 0 ? threads : 1; - if (max_cpus == 0) + + if (max_cpus == 0) { max_cpus = smp_cpus; + } + + if (max_cpus > 255) { + fprintf(stderr, "Unsupported number of maxcpus\n"); + exit(1); + } + if (max_cpus < smp_cpus) { + fprintf(stderr, "maxcpus must be equal to or greater than smp\n"); + exit(1); + } + } static void configure_realtime(QemuOpts *opts) @@ -2895,6 +2926,7 @@ int main(int argc, char **argv, char **envp) qemu_add_opts(&qemu_trace_opts); qemu_add_opts(&qemu_option_rom_opts); qemu_add_opts(&qemu_machine_opts); + qemu_add_opts(&qemu_smp_opts); qemu_add_opts(&qemu_boot_opts); qemu_add_opts(&qemu_sandbox_opts); qemu_add_opts(&qemu_add_fd_opts); @@ -3561,18 +3593,7 @@ int main(int argc, char **argv, char **envp) } break; case QEMU_OPTION_smp: - smp_parse(optarg); - if (smp_cpus < 1) { - fprintf(stderr, "Invalid number of CPUs\n"); - exit(1); - } - if (max_cpus < smp_cpus) { - fprintf(stderr, "maxcpus must be equal to or greater than " - "smp\n"); - exit(1); - } - if (max_cpus > 255) { - fprintf(stderr, "Unsupported number of maxcpus\n"); + if (!qemu_opts_parse(qemu_find_opts("smp-opts"), optarg, 1)) { exit(1); } break; @@ -3896,12 +3917,7 @@ int main(int argc, char **argv, char **envp) data_dir[data_dir_idx++] = CONFIG_QEMU_DATADIR; } - /* - * Default to max_cpus = smp_cpus, in case the user doesn't - * specify a max_cpus value. - */ - if (!max_cpus) - max_cpus = smp_cpus; + smp_parse(qemu_opts_find(qemu_find_opts("smp-opts"), NULL)); machine->max_cpus = machine->max_cpus ?: 1; /* Default to UP */ if (smp_cpus > machine->max_cpus) { |