1ca379b83SPekka Enberg #include <kvm/util.h> 2ca379b83SPekka Enberg #include <kvm/kvm-cmd.h> 32a24f96dSSasha Levin #include <kvm/builtin-debug.h> 46c757e71SSasha Levin #include <kvm/kvm.h> 5c9cba791SPekka Enberg #include <kvm/parse-options.h> 64b1addaeSSasha Levin #include <kvm/kvm-ipc.h> 7b7d2f013SSasha Levin #include <kvm/read-write.h> 86c757e71SSasha Levin 96c757e71SSasha Levin #include <stdio.h> 106c757e71SSasha Levin #include <string.h> 116c757e71SSasha Levin #include <signal.h> 12ca379b83SPekka Enberg 13b7d2f013SSasha Levin #define BUFFER_SIZE 100 14b7d2f013SSasha Levin 158d7b77f6SSasha Levin static bool all; 164b1addaeSSasha Levin static int instance; 174b1c6f6eSSasha Levin static int nmi = -1; 184b1c6f6eSSasha Levin static bool dump; 198d7b77f6SSasha Levin static const char *instance_name; 208d7b77f6SSasha Levin 21c9cba791SPekka Enberg static const char * const debug_usage[] = { 22*8d2ff5daSWanlong Gao "lkvm debug [--all] [-n name] [-d] [-m vcpu]", 23c9cba791SPekka Enberg NULL 24c9cba791SPekka Enberg }; 25c9cba791SPekka Enberg 26c9cba791SPekka Enberg static const struct option debug_options[] = { 278d7b77f6SSasha Levin OPT_GROUP("General options:"), 284b1c6f6eSSasha Levin OPT_BOOLEAN('d', "dump", &dump, "Generate a debug dump from guest"), 294b1c6f6eSSasha Levin OPT_INTEGER('m', "nmi", &nmi, "Generate NMI on VCPU"), 307070414aSSasha Levin OPT_GROUP("Instance options:"), 317070414aSSasha Levin OPT_BOOLEAN('a', "all", &all, "Debug all instances"), 327070414aSSasha Levin OPT_STRING('n', "name", &instance_name, "name", "Instance name"), 33c9cba791SPekka Enberg OPT_END() 34c9cba791SPekka Enberg }; 35c9cba791SPekka Enberg 368d7b77f6SSasha Levin static void parse_debug_options(int argc, const char **argv) 378d7b77f6SSasha Levin { 388d7b77f6SSasha Levin while (argc != 0) { 398d7b77f6SSasha Levin argc = parse_options(argc, argv, debug_options, debug_usage, 408d7b77f6SSasha Levin PARSE_OPT_STOP_AT_NON_OPTION); 418d7b77f6SSasha Levin if (argc != 0) 428d7b77f6SSasha Levin kvm_debug_help(); 438d7b77f6SSasha Levin } 448d7b77f6SSasha Levin } 458d7b77f6SSasha Levin 460725673aSSasha Levin void kvm_debug_help(void) 470725673aSSasha Levin { 480725673aSSasha Levin usage_with_options(debug_usage, debug_options); 490725673aSSasha Levin } 500725673aSSasha Levin 514b1addaeSSasha Levin static int do_debug(const char *name, int sock) 5224e7dbbaSSasha Levin { 53b7d2f013SSasha Levin char buff[BUFFER_SIZE]; 544b1c6f6eSSasha Levin struct debug_cmd cmd = {KVM_IPC_DEBUG, 2 * sizeof(u32)}; 554b1addaeSSasha Levin int r; 564b1addaeSSasha Levin 574b1c6f6eSSasha Levin if (dump) 587070414aSSasha Levin cmd.params.dbg_type |= KVM_DEBUG_CMD_TYPE_DUMP; 594b1c6f6eSSasha Levin 604b1c6f6eSSasha Levin if (nmi != -1) { 617070414aSSasha Levin cmd.params.dbg_type |= KVM_DEBUG_CMD_TYPE_NMI; 627070414aSSasha Levin cmd.params.cpu = nmi; 634b1c6f6eSSasha Levin } 644b1c6f6eSSasha Levin 65b7d2f013SSasha Levin r = xwrite(sock, &cmd, sizeof(cmd)); 664b1addaeSSasha Levin if (r < 0) 674b1addaeSSasha Levin return r; 684b1addaeSSasha Levin 694b1c6f6eSSasha Levin if (!dump) 704b1c6f6eSSasha Levin return 0; 714b1c6f6eSSasha Levin 72b7d2f013SSasha Levin do { 73b7d2f013SSasha Levin r = xread(sock, buff, BUFFER_SIZE); 74b7d2f013SSasha Levin if (r < 0) 75b7d2f013SSasha Levin return 0; 76b7d2f013SSasha Levin printf("%.*s", r, buff); 77b7d2f013SSasha Levin } while (r > 0); 78b7d2f013SSasha Levin 794b1addaeSSasha Levin return 0; 8024e7dbbaSSasha Levin } 8124e7dbbaSSasha Levin 82ca379b83SPekka Enberg int kvm_cmd_debug(int argc, const char **argv, const char *prefix) 83ca379b83SPekka Enberg { 848d7b77f6SSasha Levin parse_debug_options(argc, argv); 856c757e71SSasha Levin 868d7b77f6SSasha Levin if (all) 878d7b77f6SSasha Levin return kvm__enumerate_instances(do_debug); 888d7b77f6SSasha Levin 898d7b77f6SSasha Levin if (instance_name == NULL && 904b1addaeSSasha Levin instance == 0) 910725673aSSasha Levin kvm_debug_help(); 926c757e71SSasha Levin 938d7b77f6SSasha Levin if (instance_name) 944b1addaeSSasha Levin instance = kvm__get_sock_by_instance(instance_name); 9524e7dbbaSSasha Levin 964b1addaeSSasha Levin if (instance <= 0) 978d7b77f6SSasha Levin die("Failed locating instance"); 986c757e71SSasha Levin 994b1addaeSSasha Levin return do_debug(instance_name, instance); 100ca379b83SPekka Enberg } 101