2 * QEMU S390x KVM implementation
5 * Copyright IBM Corp. 2012
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * Contributions after 2012-10-29 are licensed under the terms of the
18 * GNU GPL, version 2 or (at your option) any later version.
20 * You should have received a copy of the GNU (Lesser) General Public
21 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 #include <sys/types.h>
25 #include <sys/ioctl.h>
28 #include <linux/kvm.h>
29 #include <asm/ptrace.h>
31 #include "qemu-common.h"
32 #include "qemu/timer.h"
33 #include "sysemu/sysemu.h"
34 #include "sysemu/kvm.h"
36 #include "sysemu/device_tree.h"
37 #include "qapi/qmp/qjson.h"
38 #include "monitor/monitor.h"
40 /* #define DEBUG_KVM */
43 #define DPRINTF(fmt, ...) \
44 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
46 #define DPRINTF(fmt, ...) \
50 #define IPA0_DIAG 0x8300
51 #define IPA0_SIGP 0xae00
52 #define IPA0_B2 0xb200
53 #define IPA0_B9 0xb900
54 #define IPA0_EB 0xeb00
56 #define PRIV_B2_SCLP_CALL 0x20
57 #define PRIV_B2_CSCH 0x30
58 #define PRIV_B2_HSCH 0x31
59 #define PRIV_B2_MSCH 0x32
60 #define PRIV_B2_SSCH 0x33
61 #define PRIV_B2_STSCH 0x34
62 #define PRIV_B2_TSCH 0x35
63 #define PRIV_B2_TPI 0x36
64 #define PRIV_B2_SAL 0x37
65 #define PRIV_B2_RSCH 0x38
66 #define PRIV_B2_STCRW 0x39
67 #define PRIV_B2_STCPS 0x3a
68 #define PRIV_B2_RCHP 0x3b
69 #define PRIV_B2_SCHM 0x3c
70 #define PRIV_B2_CHSC 0x5f
71 #define PRIV_B2_SIGA 0x74
72 #define PRIV_B2_XSCH 0x76
74 #define PRIV_EB_SQBS 0x8a
76 #define PRIV_B9_EQBS 0x9c
78 #define DIAG_IPL 0x308
79 #define DIAG_KVM_HYPERCALL 0x500
80 #define DIAG_KVM_BREAKPOINT 0x501
82 #define ICPT_INSTRUCTION 0x04
83 #define ICPT_WAITPSW 0x1c
84 #define ICPT_SOFT_INTERCEPT 0x24
85 #define ICPT_CPU_STOP 0x28
88 const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
92 static int cap_sync_regs;
93 static int cap_async_pf;
95 static void *legacy_s390_alloc(size_t size);
97 int kvm_arch_init(KVMState *s)
99 cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
100 cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
101 if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
102 || !kvm_check_extension(s, KVM_CAP_S390_COW)) {
103 phys_mem_set_alloc(legacy_s390_alloc);
108 unsigned long kvm_arch_vcpu_id(CPUState *cpu)
110 return cpu->cpu_index;
113 int kvm_arch_init_vcpu(CPUState *cpu)
115 /* nothing todo yet */
119 void kvm_arch_reset_vcpu(CPUState *cpu)
121 /* The initial reset call is needed here to reset in-kernel
122 * vcpu data that we can't access directly from QEMU
123 * (i.e. with older kernels which don't support sync_regs/ONE_REG).
124 * Before this ioctl cpu_synchronize_state() is called in common kvm
126 if (kvm_vcpu_ioctl(cpu, KVM_S390_INITIAL_RESET, NULL)) {
127 perror("Can't reset vcpu\n");
131 int kvm_arch_put_registers(CPUState *cs, int level)
133 S390CPU *cpu = S390_CPU(cs);
134 CPUS390XState *env = &cpu->env;
135 struct kvm_one_reg reg;
136 struct kvm_sregs sregs;
137 struct kvm_regs regs;
141 /* always save the PSW and the GPRS*/
142 cs->kvm_run->psw_addr = env->psw.addr;
143 cs->kvm_run->psw_mask = env->psw.mask;
145 if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) {
146 for (i = 0; i < 16; i++) {
147 cs->kvm_run->s.regs.gprs[i] = env->regs[i];
148 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS;
151 for (i = 0; i < 16; i++) {
152 regs.gprs[i] = env->regs[i];
154 ret = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s);
160 /* Do we need to save more than that? */
161 if (level == KVM_PUT_RUNTIME_STATE) {
165 reg.id = KVM_REG_S390_CPU_TIMER;
166 reg.addr = (__u64)&(env->cputm);
167 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
172 reg.id = KVM_REG_S390_CLOCK_COMP;
173 reg.addr = (__u64)&(env->ckc);
174 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
179 reg.id = KVM_REG_S390_TODPR;
180 reg.addr = (__u64)&(env->todpr);
181 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
187 reg.id = KVM_REG_S390_PFTOKEN;
188 reg.addr = (__u64)&(env->pfault_token);
189 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
194 reg.id = KVM_REG_S390_PFCOMPARE;
195 reg.addr = (__u64)&(env->pfault_compare);
196 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
201 reg.id = KVM_REG_S390_PFSELECT;
202 reg.addr = (__u64)&(env->pfault_select);
203 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
210 cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS &&
211 cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) {
212 for (i = 0; i < 16; i++) {
213 cs->kvm_run->s.regs.acrs[i] = env->aregs[i];
214 cs->kvm_run->s.regs.crs[i] = env->cregs[i];
216 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS;
217 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_CRS;
219 for (i = 0; i < 16; i++) {
220 sregs.acrs[i] = env->aregs[i];
221 sregs.crs[i] = env->cregs[i];
223 ret = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs);
229 /* Finally the prefix */
230 if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
231 cs->kvm_run->s.regs.prefix = env->psa;
232 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PREFIX;
234 /* prefix is only supported via sync regs */
239 int kvm_arch_get_registers(CPUState *cs)
241 S390CPU *cpu = S390_CPU(cs);
242 CPUS390XState *env = &cpu->env;
243 struct kvm_one_reg reg;
244 struct kvm_sregs sregs;
245 struct kvm_regs regs;
249 env->psw.addr = cs->kvm_run->psw_addr;
250 env->psw.mask = cs->kvm_run->psw_mask;
253 if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) {
254 for (i = 0; i < 16; i++) {
255 env->regs[i] = cs->kvm_run->s.regs.gprs[i];
258 r = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s);
262 for (i = 0; i < 16; i++) {
263 env->regs[i] = regs.gprs[i];
267 /* The ACRS and CRS */
269 cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS &&
270 cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) {
271 for (i = 0; i < 16; i++) {
272 env->aregs[i] = cs->kvm_run->s.regs.acrs[i];
273 env->cregs[i] = cs->kvm_run->s.regs.crs[i];
276 r = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs);
280 for (i = 0; i < 16; i++) {
281 env->aregs[i] = sregs.acrs[i];
282 env->cregs[i] = sregs.crs[i];
287 if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
288 env->psa = cs->kvm_run->s.regs.prefix;
292 reg.id = KVM_REG_S390_CPU_TIMER;
293 reg.addr = (__u64)&(env->cputm);
294 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
299 reg.id = KVM_REG_S390_CLOCK_COMP;
300 reg.addr = (__u64)&(env->ckc);
301 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
306 reg.id = KVM_REG_S390_TODPR;
307 reg.addr = (__u64)&(env->todpr);
308 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
314 reg.id = KVM_REG_S390_PFTOKEN;
315 reg.addr = (__u64)&(env->pfault_token);
316 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
321 reg.id = KVM_REG_S390_PFCOMPARE;
322 reg.addr = (__u64)&(env->pfault_compare);
323 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
328 reg.id = KVM_REG_S390_PFSELECT;
329 reg.addr = (__u64)&(env->pfault_select);
330 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
340 * Legacy layout for s390:
341 * Older S390 KVM requires the topmost vma of the RAM to be
342 * smaller than an system defined value, which is at least 256GB.
343 * Larger systems have larger values. We put the guest between
344 * the end of data segment (system break) and this value. We
345 * use 32GB as a base to have enough room for the system break
346 * to grow. We also have to use MAP parameters that avoid
347 * read-only mapping of guest pages.
349 static void *legacy_s390_alloc(size_t size)
353 mem = mmap((void *) 0x800000000ULL, size,
354 PROT_EXEC|PROT_READ|PROT_WRITE,
355 MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
356 return mem == MAP_FAILED ? NULL : mem;
359 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
361 static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
363 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) ||
364 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501, 4, 1)) {
370 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
373 static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
375 if (cpu_memory_rw_debug(cs, bp->pc, t, 4, 0)) {
377 } else if (memcmp(t, diag_501, 4)) {
379 } else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) {
386 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run)
390 void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run)
394 int kvm_arch_process_async_events(CPUState *cs)
399 void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm,
400 uint64_t parm64, int vm)
402 CPUState *cs = CPU(cpu);
403 struct kvm_s390_interrupt kvmint;
406 if (!cs->kvm_state) {
412 kvmint.parm64 = parm64;
415 r = kvm_vm_ioctl(cs->kvm_state, KVM_S390_INTERRUPT, &kvmint);
417 r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint);
421 fprintf(stderr, "KVM failed to inject interrupt\n");
426 void kvm_s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token)
428 kvm_s390_interrupt_internal(cpu, KVM_S390_INT_VIRTIO, config_change,
432 void kvm_s390_interrupt(S390CPU *cpu, int type, uint32_t code)
434 kvm_s390_interrupt_internal(cpu, type, code, 0, 0);
437 static void enter_pgmcheck(S390CPU *cpu, uint16_t code)
439 kvm_s390_interrupt(cpu, KVM_S390_PROGRAM_INT, code);
442 static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
445 CPUS390XState *env = &cpu->env;
450 cpu_synchronize_state(CPU(cpu));
451 sccb = env->regs[ipbh0 & 0xf];
452 code = env->regs[(ipbh0 & 0xf0) >> 4];
454 r = sclp_service_call(env, sccb, code);
456 enter_pgmcheck(cpu, -r);
464 static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
466 CPUS390XState *env = &cpu->env;
468 uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
470 cpu_synchronize_state(CPU(cpu));
474 ioinst_handle_xsch(cpu, env->regs[1]);
477 ioinst_handle_csch(cpu, env->regs[1]);
480 ioinst_handle_hsch(cpu, env->regs[1]);
483 ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb);
486 ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb);
489 ioinst_handle_stcrw(cpu, run->s390_sieic.ipb);
492 ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb);
495 /* We should only get tsch via KVM_EXIT_S390_TSCH. */
496 fprintf(stderr, "Spurious tsch intercept\n");
499 ioinst_handle_chsc(cpu, run->s390_sieic.ipb);
502 /* This should have been handled by kvm already. */
503 fprintf(stderr, "Spurious tpi intercept\n");
506 ioinst_handle_schm(cpu, env->regs[1], env->regs[2],
507 run->s390_sieic.ipb);
510 ioinst_handle_rsch(cpu, env->regs[1]);
513 ioinst_handle_rchp(cpu, env->regs[1]);
516 /* We do not provide this instruction, it is suppressed. */
519 ioinst_handle_sal(cpu, env->regs[1]);
522 /* Not provided, set CC = 3 for subchannel not operational */
525 case PRIV_B2_SCLP_CALL:
526 rc = kvm_sclp_service_call(cpu, run, ipbh0);
530 DPRINTF("KVM: unhandled PRIV: 0xb2%x\n", ipa1);
537 static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
543 /* just inject exception */
548 DPRINTF("KVM: unhandled PRIV: 0xb9%x\n", ipa1);
555 static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
561 /* just inject exception */
566 DPRINTF("KVM: unhandled PRIV: 0xeb%x\n", ipa1);
573 static int handle_hypercall(S390CPU *cpu, struct kvm_run *run)
575 CPUS390XState *env = &cpu->env;
578 cpu_synchronize_state(CPU(cpu));
579 ret = s390_virtio_hypercall(env);
580 if (ret == -EINVAL) {
581 enter_pgmcheck(cpu, PGM_SPECIFICATION);
588 static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run)
592 cpu_synchronize_state(CPU(cpu));
593 r1 = (run->s390_sieic.ipa & 0x00f0) >> 8;
594 r3 = run->s390_sieic.ipa & 0x000f;
595 handle_diag_308(&cpu->env, r1, r3);
598 #define DIAG_KVM_CODE_MASK 0x000000000000ffff
600 static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb)
606 * For any diagnose call we support, bits 48-63 of the resulting
607 * address specify the function code; the remainder is ignored.
609 func_code = decode_basedisp_rs(&cpu->env, ipb) & DIAG_KVM_CODE_MASK;
612 kvm_handle_diag_308(cpu, run);
614 case DIAG_KVM_HYPERCALL:
615 r = handle_hypercall(cpu, run);
617 case DIAG_KVM_BREAKPOINT:
621 DPRINTF("KVM: unknown DIAG: 0x%x\n", func_code);
629 static int kvm_s390_cpu_start(S390CPU *cpu)
631 s390_add_running_cpu(cpu);
632 qemu_cpu_kick(CPU(cpu));
633 DPRINTF("DONE: KVM cpu start: %p\n", &cpu->env);
637 int kvm_s390_cpu_restart(S390CPU *cpu)
639 kvm_s390_interrupt(cpu, KVM_S390_RESTART, 0);
640 s390_add_running_cpu(cpu);
641 qemu_cpu_kick(CPU(cpu));
642 DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env);
646 static void sigp_initial_cpu_reset(void *arg)
649 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
651 cpu_synchronize_state(cpu);
652 scc->initial_cpu_reset(cpu);
655 static void sigp_cpu_reset(void *arg)
658 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
660 cpu_synchronize_state(cpu);
664 #define SIGP_ORDER_MASK 0x000000ff
666 static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
668 CPUS390XState *env = &cpu->env;
672 uint64_t *statusreg = &env->regs[ipa1 >> 4];
675 cpu_synchronize_state(CPU(cpu));
678 order_code = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK;
680 cpu_addr = env->regs[ipa1 & 0x0f];
681 target_cpu = s390_cpu_addr2state(cpu_addr);
682 if (target_cpu == NULL) {
683 cc = 3; /* not operational */
687 switch (order_code) {
689 cc = kvm_s390_cpu_start(target_cpu);
692 cc = kvm_s390_cpu_restart(target_cpu);
695 *statusreg &= 0xffffffff00000000UL;
696 *statusreg |= SIGP_STAT_INVALID_PARAMETER;
697 cc = 1; /* status stored */
699 case SIGP_INITIAL_CPU_RESET:
700 run_on_cpu(CPU(target_cpu), sigp_initial_cpu_reset, CPU(target_cpu));
704 run_on_cpu(CPU(target_cpu), sigp_cpu_reset, CPU(target_cpu));
708 DPRINTF("KVM: unknown SIGP: 0x%x\n", order_code);
709 *statusreg &= 0xffffffff00000000UL;
710 *statusreg |= SIGP_STAT_INVALID_ORDER;
711 cc = 1; /* status stored */
720 static void handle_instruction(S390CPU *cpu, struct kvm_run *run)
722 unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
723 uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
726 DPRINTF("handle_instruction 0x%x 0x%x\n",
727 run->s390_sieic.ipa, run->s390_sieic.ipb);
730 r = handle_b2(cpu, run, ipa1);
733 r = handle_b9(cpu, run, ipa1);
736 r = handle_eb(cpu, run, ipa1);
739 r = handle_diag(cpu, run, run->s390_sieic.ipb);
742 r = handle_sigp(cpu, run, ipa1);
747 enter_pgmcheck(cpu, 0x0001);
751 static bool is_special_wait_psw(CPUState *cs)
754 return cs->kvm_run->psw_addr == 0xfffUL;
757 static int handle_intercept(S390CPU *cpu)
759 CPUState *cs = CPU(cpu);
760 struct kvm_run *run = cs->kvm_run;
761 int icpt_code = run->s390_sieic.icptcode;
764 DPRINTF("intercept: 0x%x (at 0x%lx)\n", icpt_code,
765 (long)cs->kvm_run->psw_addr);
767 case ICPT_INSTRUCTION:
768 handle_instruction(cpu, run);
771 /* disabled wait, since enabled wait is handled in kernel */
772 if (s390_del_running_cpu(cpu) == 0) {
773 if (is_special_wait_psw(cs)) {
774 qemu_system_shutdown_request();
778 data = qobject_from_jsonf("{ 'action': %s }", "pause");
779 monitor_protocol_event(QEVENT_GUEST_PANICKED, data);
780 qobject_decref(data);
781 vm_stop(RUN_STATE_GUEST_PANICKED);
787 if (s390_del_running_cpu(cpu) == 0) {
788 qemu_system_shutdown_request();
792 case ICPT_SOFT_INTERCEPT:
793 fprintf(stderr, "KVM unimplemented icpt SOFT\n");
797 fprintf(stderr, "KVM unimplemented icpt IO\n");
801 fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
809 static int handle_tsch(S390CPU *cpu)
811 CPUS390XState *env = &cpu->env;
812 CPUState *cs = CPU(cpu);
813 struct kvm_run *run = cs->kvm_run;
816 cpu_synchronize_state(cs);
818 ret = ioinst_handle_tsch(env, env->regs[1], run->s390_tsch.ipb);
820 /* Success; set condition code. */
823 } else if (ret < -1) {
826 * If an I/O interrupt had been dequeued, we have to reinject it.
828 if (run->s390_tsch.dequeued) {
829 uint16_t subchannel_id = run->s390_tsch.subchannel_id;
830 uint16_t subchannel_nr = run->s390_tsch.subchannel_nr;
831 uint32_t io_int_parm = run->s390_tsch.io_int_parm;
832 uint32_t io_int_word = run->s390_tsch.io_int_word;
833 uint32_t type = ((subchannel_id & 0xff00) << 24) |
834 ((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
836 kvm_s390_interrupt_internal(cpu, type,
837 ((uint32_t)subchannel_id << 16)
839 ((uint64_t)io_int_parm << 32)
847 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
849 S390CPU *cpu = S390_CPU(cs);
852 switch (run->exit_reason) {
853 case KVM_EXIT_S390_SIEIC:
854 ret = handle_intercept(cpu);
856 case KVM_EXIT_S390_RESET:
857 qemu_system_reset_request();
859 case KVM_EXIT_S390_TSCH:
860 ret = handle_tsch(cpu);
863 fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
868 ret = EXCP_INTERRUPT;
873 bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
878 int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
883 int kvm_arch_on_sigbus(int code, void *addr)
888 void kvm_s390_io_interrupt(S390CPU *cpu, uint16_t subchannel_id,
889 uint16_t subchannel_nr, uint32_t io_int_parm,
890 uint32_t io_int_word)
894 if (io_int_word & IO_INT_WORD_AI) {
895 type = KVM_S390_INT_IO(1, 0, 0, 0);
897 type = ((subchannel_id & 0xff00) << 24) |
898 ((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
900 kvm_s390_interrupt_internal(cpu, type,
901 ((uint32_t)subchannel_id << 16) | subchannel_nr,
902 ((uint64_t)io_int_parm << 32) | io_int_word, 1);
905 void kvm_s390_crw_mchk(S390CPU *cpu)
907 kvm_s390_interrupt_internal(cpu, KVM_S390_MCHK, 1 << 28,
908 0x00400f1d40330000, 1);
911 void kvm_s390_enable_css_support(S390CPU *cpu)
913 struct kvm_enable_cap cap = {};
916 /* Activate host kernel channel subsystem support. */
917 cap.cap = KVM_CAP_S390_CSS_SUPPORT;
918 r = kvm_vcpu_ioctl(CPU(cpu), KVM_ENABLE_CAP, &cap);
922 void kvm_arch_init_irq_routing(KVMState *s)
926 int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
929 struct kvm_ioeventfd kick = {
930 .flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY |
931 KVM_IOEVENTFD_FLAG_DATAMATCH,
932 .fd = event_notifier_get_fd(notifier),
937 if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
941 kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
943 return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);