1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * definition for kvm on s390 4 * 5 * Copyright IBM Corp. 2008, 2020 6 * 7 * Author(s): Carsten Otte <cotte@de.ibm.com> 8 * Christian Borntraeger <borntraeger@de.ibm.com> 9 * Christian Ehrhardt <ehrhardt@de.ibm.com> 10 */ 11 12#ifndef ARCH_S390_KVM_S390_H 13#define ARCH_S390_KVM_S390_H 14 15#include <linux/hrtimer.h> 16#include <linux/kvm.h> 17#include <linux/kvm_host.h> 18#include <linux/lockdep.h> 19#include <asm/facility.h> 20#include <asm/processor.h> 21#include <asm/sclp.h> 22 23/* Transactional Memory Execution related macros */ 24#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE)) 25#define TDB_FORMAT1 1 26#define IS_ITDB_VALID(vcpu) \ 27 ((*(char *)phys_to_virt((vcpu)->arch.sie_block->itdba) == TDB_FORMAT1)) 28 29extern debug_info_t *kvm_s390_dbf; 30extern debug_info_t *kvm_s390_dbf_uv; 31 32#define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 33do { \ 34 debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \ 35 d_args); \ 36 debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \ 37 "%d: " d_string "\n", (d_kvm)->userspace_pid, \ 38 d_args); \ 39} while (0) 40 41#define KVM_EVENT(d_loglevel, d_string, d_args...)\ 42do { \ 43 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \ 44 d_args); \ 45} while (0) 46 47#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 48do { \ 49 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ 50 d_args); \ 51} while (0) 52 53#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\ 54do { \ 55 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \ 56 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \ 57 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\ 58 d_args); \ 59} while (0) 60 61static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 62{ 63 atomic_or(flags, &vcpu->arch.sie_block->cpuflags); 64} 65 66static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 67{ 68 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags); 69} 70 71static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 72{ 73 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags; 74} 75 76static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 77{ 78 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED); 79} 80 81static inline int is_vcpu_idle(struct kvm_vcpu *vcpu) 82{ 83 return test_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask); 84} 85 86static inline int kvm_is_ucontrol(struct kvm *kvm) 87{ 88#ifdef CONFIG_KVM_S390_UCONTROL 89 if (kvm->arch.gmap) 90 return 0; 91 return 1; 92#else 93 return 0; 94#endif 95} 96 97#define GUEST_PREFIX_SHIFT 13 98static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 99{ 100 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 101} 102 103static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 104{ 105 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id, 106 prefix); 107 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 108 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 109 kvm_make_request(KVM_REQ_REFRESH_GUEST_PREFIX, vcpu); 110} 111 112static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar) 113{ 114 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 115 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 116 117 if (ar) 118 *ar = base2; 119 120 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 121} 122 123static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 124 u64 *address1, u64 *address2, 125 u8 *ar_b1, u8 *ar_b2) 126{ 127 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 128 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 129 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 130 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 131 132 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 133 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 134 135 if (ar_b1) 136 *ar_b1 = base1; 137 if (ar_b2) 138 *ar_b2 = base2; 139} 140 141static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 142{ 143 if (r1) 144 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 145 if (r2) 146 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 147} 148 149static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar) 150{ 151 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 152 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 153 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 154 /* The displacement is a 20bit _SIGNED_ value */ 155 if (disp2 & 0x80000) 156 disp2+=0xfff00000; 157 158 if (ar) 159 *ar = base2; 160 161 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 162} 163 164static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar) 165{ 166 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 167 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 168 169 if (ar) 170 *ar = base2; 171 172 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 173} 174 175/* Set the condition code in the guest program status word */ 176static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 177{ 178 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 179 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 180} 181 182/* test availability of facility in a kvm instance */ 183static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) 184{ 185 return __test_facility(nr, kvm->arch.model.fac_mask) && 186 __test_facility(nr, kvm->arch.model.fac_list); 187} 188 189static inline int set_kvm_facility(u64 *fac_list, unsigned long nr) 190{ 191 unsigned char *ptr; 192 193 if (nr >= MAX_FACILITY_BIT) 194 return -EINVAL; 195 ptr = (unsigned char *) fac_list + (nr >> 3); 196 *ptr |= (0x80UL >> (nr & 7)); 197 return 0; 198} 199 200static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr) 201{ 202 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS); 203 return test_bit_inv(nr, kvm->arch.cpu_feat); 204} 205 206/* are cpu states controlled by user space */ 207static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 208{ 209 return kvm->arch.user_cpu_state_ctrl != 0; 210} 211 212static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm) 213{ 214 if (kvm->arch.user_cpu_state_ctrl) 215 return; 216 217 VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control"); 218 kvm->arch.user_cpu_state_ctrl = 1; 219} 220 221/* get the end gfn of the last (highest gfn) memslot */ 222static inline unsigned long kvm_s390_get_gfn_end(struct kvm_memslots *slots) 223{ 224 struct rb_node *node; 225 struct kvm_memory_slot *ms; 226 227 if (WARN_ON(kvm_memslots_empty(slots))) 228 return 0; 229 230 node = rb_last(&slots->gfn_tree); 231 ms = container_of(node, struct kvm_memory_slot, gfn_node[slots->node_idx]); 232 return ms->base_gfn + ms->npages; 233} 234 235static inline u32 kvm_s390_get_gisa_desc(struct kvm *kvm) 236{ 237 u32 gd = virt_to_phys(kvm->arch.gisa_int.origin); 238 239 if (gd && sclp.has_gisaf) 240 gd |= GISA_FORMAT1; 241 return gd; 242} 243 244/* implemented in pv.c */ 245int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc); 246int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc); 247int kvm_s390_pv_set_aside(struct kvm *kvm, u16 *rc, u16 *rrc); 248int kvm_s390_pv_deinit_aside_vm(struct kvm *kvm, u16 *rc, u16 *rrc); 249int kvm_s390_pv_deinit_cleanup_all(struct kvm *kvm, u16 *rc, u16 *rrc); 250int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc); 251int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc); 252int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc, 253 u16 *rrc); 254int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size, 255 unsigned long tweak, u16 *rc, u16 *rrc); 256int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state); 257int kvm_s390_pv_dump_cpu(struct kvm_vcpu *vcpu, void *buff, u16 *rc, u16 *rrc); 258int kvm_s390_pv_dump_stor_state(struct kvm *kvm, void __user *buff_user, 259 u64 *gaddr, u64 buff_user_len, u16 *rc, u16 *rrc); 260int kvm_s390_pv_dump_complete(struct kvm *kvm, void __user *buff_user, 261 u16 *rc, u16 *rrc); 262 263static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm) 264{ 265 return kvm->arch.pv.handle; 266} 267 268static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu) 269{ 270 return vcpu->arch.pv.handle; 271} 272 273/* implemented in interrupt.c */ 274int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 275void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 276enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 277int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 278void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 279void kvm_s390_clear_float_irqs(struct kvm *kvm); 280int __must_check kvm_s390_inject_vm(struct kvm *kvm, 281 struct kvm_s390_interrupt *s390int); 282int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 283 struct kvm_s390_irq *irq); 284static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 285 struct kvm_s390_pgm_info *pgm_info) 286{ 287 struct kvm_s390_irq irq = { 288 .type = KVM_S390_PROGRAM_INT, 289 .u.pgm = *pgm_info, 290 }; 291 292 return kvm_s390_inject_vcpu(vcpu, &irq); 293} 294static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) 295{ 296 struct kvm_s390_irq irq = { 297 .type = KVM_S390_PROGRAM_INT, 298 .u.pgm.code = code, 299 }; 300 301 return kvm_s390_inject_vcpu(vcpu, &irq); 302} 303struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 304 u64 isc_mask, u32 schid); 305int kvm_s390_reinject_io_int(struct kvm *kvm, 306 struct kvm_s390_interrupt_info *inti); 307int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 308 309/* implemented in intercept.c */ 310u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu); 311int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 312static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen) 313{ 314 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; 315 316 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen); 317} 318static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) 319{ 320 kvm_s390_rewind_psw(vcpu, -ilen); 321} 322static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) 323{ 324 /* don't inject PER events if we re-execute the instruction */ 325 vcpu->arch.sie_block->icptstatus &= ~0x02; 326 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); 327} 328 329int handle_sthyi(struct kvm_vcpu *vcpu); 330 331/* implemented in priv.c */ 332int is_valid_psw(psw_t *psw); 333int kvm_s390_handle_aa(struct kvm_vcpu *vcpu); 334int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 335int kvm_s390_handle_e3(struct kvm_vcpu *vcpu); 336int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 337int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 338int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 339int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 340int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 341int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 342int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 343int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu); 344 345/* implemented in vsie.c */ 346int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu); 347void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu); 348void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start, 349 unsigned long end); 350void kvm_s390_vsie_init(struct kvm *kvm); 351void kvm_s390_vsie_destroy(struct kvm *kvm); 352 353/* implemented in sigp.c */ 354int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 355int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 356 357/* implemented in kvm-s390.c */ 358int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod); 359long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 360int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 361int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 362int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 363int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 364void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); 365void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); 366bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu); 367void exit_sie(struct kvm_vcpu *vcpu); 368void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); 369int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 370void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 371void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm); 372__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu); 373int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rc, u16 *rrc); 374 375/* implemented in diag.c */ 376int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 377 378static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) 379{ 380 unsigned long i; 381 struct kvm_vcpu *vcpu; 382 383 WARN_ON(!mutex_is_locked(&kvm->lock)); 384 kvm_for_each_vcpu(i, vcpu, kvm) 385 kvm_s390_vcpu_block(vcpu); 386} 387 388static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) 389{ 390 unsigned long i; 391 struct kvm_vcpu *vcpu; 392 393 kvm_for_each_vcpu(i, vcpu, kvm) 394 kvm_s390_vcpu_unblock(vcpu); 395} 396 397static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm) 398{ 399 u64 rc; 400 401 preempt_disable(); 402 rc = get_tod_clock_fast() + kvm->arch.epoch; 403 preempt_enable(); 404 return rc; 405} 406 407/** 408 * kvm_s390_inject_prog_cond - conditionally inject a program check 409 * @vcpu: virtual cpu 410 * @rc: original return/error code 411 * 412 * This function is supposed to be used after regular guest access functions 413 * failed, to conditionally inject a program check to a vcpu. The typical 414 * pattern would look like 415 * 416 * rc = write_guest(vcpu, addr, data, len); 417 * if (rc) 418 * return kvm_s390_inject_prog_cond(vcpu, rc); 419 * 420 * A negative return code from guest access functions implies an internal error 421 * like e.g. out of memory. In these cases no program check should be injected 422 * to the guest. 423 * A positive value implies that an exception happened while accessing a guest's 424 * memory. In this case all data belonging to the corresponding program check 425 * has been stored in vcpu->arch.pgm and can be injected with 426 * kvm_s390_inject_prog_irq(). 427 * 428 * Returns: - the original @rc value if @rc was negative (internal error) 429 * - zero if @rc was already zero 430 * - zero or error code from injecting if @rc was positive 431 * (program check injected to @vcpu) 432 */ 433static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 434{ 435 if (rc <= 0) 436 return rc; 437 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 438} 439 440int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 441 struct kvm_s390_irq *s390irq); 442 443/* implemented in interrupt.c */ 444int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 445int psw_extint_disabled(struct kvm_vcpu *vcpu); 446void kvm_s390_destroy_adapters(struct kvm *kvm); 447int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 448extern struct kvm_device_ops kvm_flic_ops; 449int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 450int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu); 451void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 452int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, 453 void __user *buf, int len); 454int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, 455 __u8 __user *buf, int len); 456void kvm_s390_gisa_init(struct kvm *kvm); 457void kvm_s390_gisa_clear(struct kvm *kvm); 458void kvm_s390_gisa_destroy(struct kvm *kvm); 459void kvm_s390_gisa_disable(struct kvm *kvm); 460void kvm_s390_gisa_enable(struct kvm *kvm); 461int __init kvm_s390_gib_init(u8 nisc); 462void kvm_s390_gib_destroy(void); 463 464/* implemented in guestdbg.c */ 465void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 466void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 467void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 468int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 469 struct kvm_guest_debug *dbg); 470void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 471void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 472int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu); 473int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 474 475/* support for Basic/Extended SCA handling */ 476static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm) 477{ 478 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */ 479 480 return &sca->ipte_control; 481} 482static inline int kvm_s390_use_sca_entries(void) 483{ 484 /* 485 * Without SIGP interpretation, only SRS interpretation (if available) 486 * might use the entries. By not setting the entries and keeping them 487 * invalid, hardware will not access them but intercept. 488 */ 489 return sclp.has_sigpif; 490} 491void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, 492 struct mcck_volatile_info *mcck_info); 493 494/** 495 * kvm_s390_vcpu_crypto_reset_all 496 * 497 * Reset the crypto attributes for each vcpu. This can be done while the vcpus 498 * are running as each vcpu will be removed from SIE before resetting the crypt 499 * attributes and restored to SIE afterward. 500 * 501 * Note: The kvm->lock must be held while calling this function 502 * 503 * @kvm: the KVM guest 504 */ 505void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm); 506 507/** 508 * kvm_s390_vcpu_pci_enable_interp 509 * 510 * Set the associated PCI attributes for each vcpu to allow for zPCI Load/Store 511 * interpretation as well as adapter interruption forwarding. 512 * 513 * @kvm: the KVM guest 514 */ 515void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm); 516 517/** 518 * diag9c_forwarding_hz 519 * 520 * Set the maximum number of diag9c forwarding per second 521 */ 522extern unsigned int diag9c_forwarding_hz; 523 524#endif 525