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"
39 #include "exec/gdbstub.h"
42 /* #define DEBUG_KVM */
45 #define DPRINTF(fmt, ...) \
46 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
48 #define DPRINTF(fmt, ...) \
52 #define IPA0_DIAG 0x8300
53 #define IPA0_SIGP 0xae00
54 #define IPA0_B2 0xb200
55 #define IPA0_B9 0xb900
56 #define IPA0_EB 0xeb00
58 #define PRIV_B2_SCLP_CALL 0x20
59 #define PRIV_B2_CSCH 0x30
60 #define PRIV_B2_HSCH 0x31
61 #define PRIV_B2_MSCH 0x32
62 #define PRIV_B2_SSCH 0x33
63 #define PRIV_B2_STSCH 0x34
64 #define PRIV_B2_TSCH 0x35
65 #define PRIV_B2_TPI 0x36
66 #define PRIV_B2_SAL 0x37
67 #define PRIV_B2_RSCH 0x38
68 #define PRIV_B2_STCRW 0x39
69 #define PRIV_B2_STCPS 0x3a
70 #define PRIV_B2_RCHP 0x3b
71 #define PRIV_B2_SCHM 0x3c
72 #define PRIV_B2_CHSC 0x5f
73 #define PRIV_B2_SIGA 0x74
74 #define PRIV_B2_XSCH 0x76
76 #define PRIV_EB_SQBS 0x8a
78 #define PRIV_B9_EQBS 0x9c
80 #define DIAG_IPL 0x308
81 #define DIAG_KVM_HYPERCALL 0x500
82 #define DIAG_KVM_BREAKPOINT 0x501
84 #define ICPT_INSTRUCTION 0x04
85 #define ICPT_WAITPSW 0x1c
86 #define ICPT_SOFT_INTERCEPT 0x24
87 #define ICPT_CPU_STOP 0x28
90 static CPUWatchpoint hw_watchpoint;
92 * We don't use a list because this structure is also used to transmit the
93 * hardware breakpoints to the kernel.
95 static struct kvm_hw_breakpoint *hw_breakpoints;
96 static int nb_hw_breakpoints;
98 const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
102 static int cap_sync_regs;
103 static int cap_async_pf;
105 static void *legacy_s390_alloc(size_t size);
107 int kvm_arch_init(KVMState *s)
109 cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
110 cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
111 if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
112 || !kvm_check_extension(s, KVM_CAP_S390_COW)) {
113 phys_mem_set_alloc(legacy_s390_alloc);
118 unsigned long kvm_arch_vcpu_id(CPUState *cpu)
120 return cpu->cpu_index;
123 int kvm_arch_init_vcpu(CPUState *cpu)
125 /* nothing todo yet */
129 void kvm_s390_reset_vcpu(S390CPU *cpu)
131 CPUState *cs = CPU(cpu);
133 /* The initial reset call is needed here to reset in-kernel
134 * vcpu data that we can't access directly from QEMU
135 * (i.e. with older kernels which don't support sync_regs/ONE_REG).
136 * Before this ioctl cpu_synchronize_state() is called in common kvm
138 if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL)) {
139 perror("Can't reset vcpu\n");
143 int kvm_arch_put_registers(CPUState *cs, int level)
145 S390CPU *cpu = S390_CPU(cs);
146 CPUS390XState *env = &cpu->env;
147 struct kvm_sregs sregs;
148 struct kvm_regs regs;
152 /* always save the PSW and the GPRS*/
153 cs->kvm_run->psw_addr = env->psw.addr;
154 cs->kvm_run->psw_mask = env->psw.mask;
156 if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) {
157 for (i = 0; i < 16; i++) {
158 cs->kvm_run->s.regs.gprs[i] = env->regs[i];
159 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS;
162 for (i = 0; i < 16; i++) {
163 regs.gprs[i] = env->regs[i];
165 r = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s);
171 /* Do we need to save more than that? */
172 if (level == KVM_PUT_RUNTIME_STATE) {
177 * These ONE_REGS are not protected by a capability. As they are only
178 * necessary for migration we just trace a possible error, but don't
179 * return with an error return code.
181 kvm_set_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
182 kvm_set_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
183 kvm_set_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
184 kvm_set_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
185 kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp);
188 r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
192 r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
196 r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
203 cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS &&
204 cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) {
205 for (i = 0; i < 16; i++) {
206 cs->kvm_run->s.regs.acrs[i] = env->aregs[i];
207 cs->kvm_run->s.regs.crs[i] = env->cregs[i];
209 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS;
210 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_CRS;
212 for (i = 0; i < 16; i++) {
213 sregs.acrs[i] = env->aregs[i];
214 sregs.crs[i] = env->cregs[i];
216 r = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs);
222 /* Finally the prefix */
223 if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
224 cs->kvm_run->s.regs.prefix = env->psa;
225 cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PREFIX;
227 /* prefix is only supported via sync regs */
232 int kvm_arch_get_registers(CPUState *cs)
234 S390CPU *cpu = S390_CPU(cs);
235 CPUS390XState *env = &cpu->env;
236 struct kvm_sregs sregs;
237 struct kvm_regs regs;
241 env->psw.addr = cs->kvm_run->psw_addr;
242 env->psw.mask = cs->kvm_run->psw_mask;
245 if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) {
246 for (i = 0; i < 16; i++) {
247 env->regs[i] = cs->kvm_run->s.regs.gprs[i];
250 r = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s);
254 for (i = 0; i < 16; i++) {
255 env->regs[i] = regs.gprs[i];
259 /* The ACRS and CRS */
261 cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS &&
262 cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) {
263 for (i = 0; i < 16; i++) {
264 env->aregs[i] = cs->kvm_run->s.regs.acrs[i];
265 env->cregs[i] = cs->kvm_run->s.regs.crs[i];
268 r = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs);
272 for (i = 0; i < 16; i++) {
273 env->aregs[i] = sregs.acrs[i];
274 env->cregs[i] = sregs.crs[i];
279 if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
280 env->psa = cs->kvm_run->s.regs.prefix;
284 * These ONE_REGS are not protected by a capability. As they are only
285 * necessary for migration we just trace a possible error, but don't
286 * return with an error return code.
288 kvm_get_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
289 kvm_get_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
290 kvm_get_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
291 kvm_get_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
292 kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp);
295 r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
299 r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
303 r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
313 * Legacy layout for s390:
314 * Older S390 KVM requires the topmost vma of the RAM to be
315 * smaller than an system defined value, which is at least 256GB.
316 * Larger systems have larger values. We put the guest between
317 * the end of data segment (system break) and this value. We
318 * use 32GB as a base to have enough room for the system break
319 * to grow. We also have to use MAP parameters that avoid
320 * read-only mapping of guest pages.
322 static void *legacy_s390_alloc(size_t size)
326 mem = mmap((void *) 0x800000000ULL, size,
327 PROT_EXEC|PROT_READ|PROT_WRITE,
328 MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
329 return mem == MAP_FAILED ? NULL : mem;
332 /* DIAG 501 is used for sw breakpoints */
333 static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
335 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
338 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
339 sizeof(diag_501), 0) ||
340 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501,
341 sizeof(diag_501), 1)) {
347 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
349 uint8_t t[sizeof(diag_501)];
351 if (cpu_memory_rw_debug(cs, bp->pc, t, sizeof(diag_501), 0)) {
353 } else if (memcmp(t, diag_501, sizeof(diag_501))) {
355 } else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
356 sizeof(diag_501), 1)) {
363 static struct kvm_hw_breakpoint *find_hw_breakpoint(target_ulong addr,
368 for (n = 0; n < nb_hw_breakpoints; n++) {
369 if (hw_breakpoints[n].addr == addr && hw_breakpoints[n].type == type &&
370 (hw_breakpoints[n].len == len || len == -1)) {
371 return &hw_breakpoints[n];
378 static int insert_hw_breakpoint(target_ulong addr, int len, int type)
382 if (find_hw_breakpoint(addr, len, type)) {
386 size = (nb_hw_breakpoints + 1) * sizeof(struct kvm_hw_breakpoint);
388 if (!hw_breakpoints) {
389 nb_hw_breakpoints = 0;
390 hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_malloc(size);
393 (struct kvm_hw_breakpoint *)g_try_realloc(hw_breakpoints, size);
396 if (!hw_breakpoints) {
397 nb_hw_breakpoints = 0;
401 hw_breakpoints[nb_hw_breakpoints].addr = addr;
402 hw_breakpoints[nb_hw_breakpoints].len = len;
403 hw_breakpoints[nb_hw_breakpoints].type = type;
410 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
411 target_ulong len, int type)
414 case GDB_BREAKPOINT_HW:
417 case GDB_WATCHPOINT_WRITE:
421 type = KVM_HW_WP_WRITE;
426 return insert_hw_breakpoint(addr, len, type);
429 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
430 target_ulong len, int type)
433 struct kvm_hw_breakpoint *bp = find_hw_breakpoint(addr, len, type);
440 if (nb_hw_breakpoints > 0) {
442 * In order to trim the array, move the last element to the position to
443 * be removed - if necessary.
445 if (bp != &hw_breakpoints[nb_hw_breakpoints]) {
446 *bp = hw_breakpoints[nb_hw_breakpoints];
448 size = nb_hw_breakpoints * sizeof(struct kvm_hw_breakpoint);
450 (struct kvm_hw_breakpoint *)g_realloc(hw_breakpoints, size);
452 g_free(hw_breakpoints);
453 hw_breakpoints = NULL;
459 void kvm_arch_remove_all_hw_breakpoints(void)
461 nb_hw_breakpoints = 0;
462 g_free(hw_breakpoints);
463 hw_breakpoints = NULL;
466 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg)
470 if (nb_hw_breakpoints > 0) {
471 dbg->arch.nr_hw_bp = nb_hw_breakpoints;
472 dbg->arch.hw_bp = hw_breakpoints;
474 for (i = 0; i < nb_hw_breakpoints; ++i) {
475 hw_breakpoints[i].phys_addr = s390_cpu_get_phys_addr_debug(cpu,
476 hw_breakpoints[i].addr);
478 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP;
480 dbg->arch.nr_hw_bp = 0;
481 dbg->arch.hw_bp = NULL;
485 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run)
489 void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run)
493 int kvm_arch_process_async_events(CPUState *cs)
498 void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm,
499 uint64_t parm64, int vm)
501 CPUState *cs = CPU(cpu);
502 struct kvm_s390_interrupt kvmint;
505 if (!cs->kvm_state) {
511 kvmint.parm64 = parm64;
514 r = kvm_vm_ioctl(cs->kvm_state, KVM_S390_INTERRUPT, &kvmint);
516 r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint);
520 fprintf(stderr, "KVM failed to inject interrupt\n");
525 void kvm_s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token)
527 kvm_s390_interrupt_internal(cpu, KVM_S390_INT_VIRTIO, config_change,
531 void kvm_s390_interrupt(S390CPU *cpu, int type, uint32_t code)
533 kvm_s390_interrupt_internal(cpu, type, code, 0, 0);
536 static void enter_pgmcheck(S390CPU *cpu, uint16_t code)
538 kvm_s390_interrupt(cpu, KVM_S390_PROGRAM_INT, code);
541 static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
544 CPUS390XState *env = &cpu->env;
549 cpu_synchronize_state(CPU(cpu));
550 sccb = env->regs[ipbh0 & 0xf];
551 code = env->regs[(ipbh0 & 0xf0) >> 4];
553 r = sclp_service_call(env, sccb, code);
555 enter_pgmcheck(cpu, -r);
563 static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
565 CPUS390XState *env = &cpu->env;
567 uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
569 cpu_synchronize_state(CPU(cpu));
573 ioinst_handle_xsch(cpu, env->regs[1]);
576 ioinst_handle_csch(cpu, env->regs[1]);
579 ioinst_handle_hsch(cpu, env->regs[1]);
582 ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb);
585 ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb);
588 ioinst_handle_stcrw(cpu, run->s390_sieic.ipb);
591 ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb);
594 /* We should only get tsch via KVM_EXIT_S390_TSCH. */
595 fprintf(stderr, "Spurious tsch intercept\n");
598 ioinst_handle_chsc(cpu, run->s390_sieic.ipb);
601 /* This should have been handled by kvm already. */
602 fprintf(stderr, "Spurious tpi intercept\n");
605 ioinst_handle_schm(cpu, env->regs[1], env->regs[2],
606 run->s390_sieic.ipb);
609 ioinst_handle_rsch(cpu, env->regs[1]);
612 ioinst_handle_rchp(cpu, env->regs[1]);
615 /* We do not provide this instruction, it is suppressed. */
618 ioinst_handle_sal(cpu, env->regs[1]);
621 /* Not provided, set CC = 3 for subchannel not operational */
624 case PRIV_B2_SCLP_CALL:
625 rc = kvm_sclp_service_call(cpu, run, ipbh0);
629 DPRINTF("KVM: unhandled PRIV: 0xb2%x\n", ipa1);
636 static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
642 /* just inject exception */
647 DPRINTF("KVM: unhandled PRIV: 0xb9%x\n", ipa1);
654 static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
660 /* just inject exception */
665 DPRINTF("KVM: unhandled PRIV: 0xeb%x\n", ipa1);
672 static int handle_hypercall(S390CPU *cpu, struct kvm_run *run)
674 CPUS390XState *env = &cpu->env;
677 cpu_synchronize_state(CPU(cpu));
678 ret = s390_virtio_hypercall(env);
679 if (ret == -EINVAL) {
680 enter_pgmcheck(cpu, PGM_SPECIFICATION);
687 static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run)
691 cpu_synchronize_state(CPU(cpu));
692 r1 = (run->s390_sieic.ipa & 0x00f0) >> 8;
693 r3 = run->s390_sieic.ipa & 0x000f;
694 handle_diag_308(&cpu->env, r1, r3);
697 static int handle_sw_breakpoint(S390CPU *cpu, struct kvm_run *run)
699 CPUS390XState *env = &cpu->env;
702 cpu_synchronize_state(CPU(cpu));
704 pc = env->psw.addr - 4;
705 if (kvm_find_sw_breakpoint(CPU(cpu), pc)) {
713 #define DIAG_KVM_CODE_MASK 0x000000000000ffff
715 static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb)
721 * For any diagnose call we support, bits 48-63 of the resulting
722 * address specify the function code; the remainder is ignored.
724 func_code = decode_basedisp_rs(&cpu->env, ipb) & DIAG_KVM_CODE_MASK;
727 kvm_handle_diag_308(cpu, run);
729 case DIAG_KVM_HYPERCALL:
730 r = handle_hypercall(cpu, run);
732 case DIAG_KVM_BREAKPOINT:
733 r = handle_sw_breakpoint(cpu, run);
736 DPRINTF("KVM: unknown DIAG: 0x%x\n", func_code);
744 static int kvm_s390_cpu_start(S390CPU *cpu)
746 s390_add_running_cpu(cpu);
747 qemu_cpu_kick(CPU(cpu));
748 DPRINTF("DONE: KVM cpu start: %p\n", &cpu->env);
752 int kvm_s390_cpu_restart(S390CPU *cpu)
754 kvm_s390_interrupt(cpu, KVM_S390_RESTART, 0);
755 s390_add_running_cpu(cpu);
756 qemu_cpu_kick(CPU(cpu));
757 DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env);
761 static void sigp_initial_cpu_reset(void *arg)
764 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
766 cpu_synchronize_state(cpu);
767 scc->initial_cpu_reset(cpu);
770 static void sigp_cpu_reset(void *arg)
773 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
775 cpu_synchronize_state(cpu);
779 #define SIGP_ORDER_MASK 0x000000ff
781 static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
783 CPUS390XState *env = &cpu->env;
787 uint64_t *statusreg = &env->regs[ipa1 >> 4];
790 cpu_synchronize_state(CPU(cpu));
793 order_code = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK;
795 cpu_addr = env->regs[ipa1 & 0x0f];
796 target_cpu = s390_cpu_addr2state(cpu_addr);
797 if (target_cpu == NULL) {
798 cc = 3; /* not operational */
802 switch (order_code) {
804 cc = kvm_s390_cpu_start(target_cpu);
807 cc = kvm_s390_cpu_restart(target_cpu);
810 *statusreg &= 0xffffffff00000000UL;
811 *statusreg |= SIGP_STAT_INVALID_PARAMETER;
812 cc = 1; /* status stored */
814 case SIGP_INITIAL_CPU_RESET:
815 run_on_cpu(CPU(target_cpu), sigp_initial_cpu_reset, CPU(target_cpu));
819 run_on_cpu(CPU(target_cpu), sigp_cpu_reset, CPU(target_cpu));
823 DPRINTF("KVM: unknown SIGP: 0x%x\n", order_code);
824 *statusreg &= 0xffffffff00000000UL;
825 *statusreg |= SIGP_STAT_INVALID_ORDER;
826 cc = 1; /* status stored */
835 static int handle_instruction(S390CPU *cpu, struct kvm_run *run)
837 unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
838 uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
841 DPRINTF("handle_instruction 0x%x 0x%x\n",
842 run->s390_sieic.ipa, run->s390_sieic.ipb);
845 r = handle_b2(cpu, run, ipa1);
848 r = handle_b9(cpu, run, ipa1);
851 r = handle_eb(cpu, run, ipa1);
854 r = handle_diag(cpu, run, run->s390_sieic.ipb);
857 r = handle_sigp(cpu, run, ipa1);
863 enter_pgmcheck(cpu, 0x0001);
869 static bool is_special_wait_psw(CPUState *cs)
872 return cs->kvm_run->psw_addr == 0xfffUL;
875 static int handle_intercept(S390CPU *cpu)
877 CPUState *cs = CPU(cpu);
878 struct kvm_run *run = cs->kvm_run;
879 int icpt_code = run->s390_sieic.icptcode;
882 DPRINTF("intercept: 0x%x (at 0x%lx)\n", icpt_code,
883 (long)cs->kvm_run->psw_addr);
885 case ICPT_INSTRUCTION:
886 r = handle_instruction(cpu, run);
889 /* disabled wait, since enabled wait is handled in kernel */
890 if (s390_del_running_cpu(cpu) == 0) {
891 if (is_special_wait_psw(cs)) {
892 qemu_system_shutdown_request();
896 data = qobject_from_jsonf("{ 'action': %s }", "pause");
897 monitor_protocol_event(QEVENT_GUEST_PANICKED, data);
898 qobject_decref(data);
899 vm_stop(RUN_STATE_GUEST_PANICKED);
905 if (s390_del_running_cpu(cpu) == 0) {
906 qemu_system_shutdown_request();
910 case ICPT_SOFT_INTERCEPT:
911 fprintf(stderr, "KVM unimplemented icpt SOFT\n");
915 fprintf(stderr, "KVM unimplemented icpt IO\n");
919 fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
927 static int handle_tsch(S390CPU *cpu)
929 CPUS390XState *env = &cpu->env;
930 CPUState *cs = CPU(cpu);
931 struct kvm_run *run = cs->kvm_run;
934 cpu_synchronize_state(cs);
936 ret = ioinst_handle_tsch(env, env->regs[1], run->s390_tsch.ipb);
938 /* Success; set condition code. */
941 } else if (ret < -1) {
944 * If an I/O interrupt had been dequeued, we have to reinject it.
946 if (run->s390_tsch.dequeued) {
947 uint16_t subchannel_id = run->s390_tsch.subchannel_id;
948 uint16_t subchannel_nr = run->s390_tsch.subchannel_nr;
949 uint32_t io_int_parm = run->s390_tsch.io_int_parm;
950 uint32_t io_int_word = run->s390_tsch.io_int_word;
951 uint32_t type = ((subchannel_id & 0xff00) << 24) |
952 ((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
954 kvm_s390_interrupt_internal(cpu, type,
955 ((uint32_t)subchannel_id << 16)
957 ((uint64_t)io_int_parm << 32)
965 static int kvm_arch_handle_debug_exit(S390CPU *cpu)
967 CPUState *cs = CPU(cpu);
968 struct kvm_run *run = cs->kvm_run;
971 struct kvm_debug_exit_arch *arch_info = &run->debug.arch;
973 switch (arch_info->type) {
974 case KVM_HW_WP_WRITE:
975 if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) {
976 cs->watchpoint_hit = &hw_watchpoint;
977 hw_watchpoint.vaddr = arch_info->addr;
978 hw_watchpoint.flags = BP_MEM_WRITE;
983 if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) {
988 if (cs->singlestep_enabled) {
999 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
1001 S390CPU *cpu = S390_CPU(cs);
1004 switch (run->exit_reason) {
1005 case KVM_EXIT_S390_SIEIC:
1006 ret = handle_intercept(cpu);
1008 case KVM_EXIT_S390_RESET:
1009 qemu_system_reset_request();
1011 case KVM_EXIT_S390_TSCH:
1012 ret = handle_tsch(cpu);
1014 case KVM_EXIT_DEBUG:
1015 ret = kvm_arch_handle_debug_exit(cpu);
1018 fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
1023 ret = EXCP_INTERRUPT;
1028 bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
1033 int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
1038 int kvm_arch_on_sigbus(int code, void *addr)
1043 void kvm_s390_io_interrupt(S390CPU *cpu, uint16_t subchannel_id,
1044 uint16_t subchannel_nr, uint32_t io_int_parm,
1045 uint32_t io_int_word)
1049 if (io_int_word & IO_INT_WORD_AI) {
1050 type = KVM_S390_INT_IO(1, 0, 0, 0);
1052 type = ((subchannel_id & 0xff00) << 24) |
1053 ((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
1055 kvm_s390_interrupt_internal(cpu, type,
1056 ((uint32_t)subchannel_id << 16) | subchannel_nr,
1057 ((uint64_t)io_int_parm << 32) | io_int_word, 1);
1060 void kvm_s390_crw_mchk(S390CPU *cpu)
1062 kvm_s390_interrupt_internal(cpu, KVM_S390_MCHK, 1 << 28,
1063 0x00400f1d40330000, 1);
1066 void kvm_s390_enable_css_support(S390CPU *cpu)
1070 /* Activate host kernel channel subsystem support. */
1071 r = kvm_vcpu_enable_cap(CPU(cpu), KVM_CAP_S390_CSS_SUPPORT, 0);
1075 void kvm_arch_init_irq_routing(KVMState *s)
1078 * Note that while irqchip capabilities generally imply that cpustates
1079 * are handled in-kernel, it is not true for s390 (yet); therefore, we
1080 * have to override the common code kvm_halt_in_kernel_allowed setting.
1082 if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) {
1083 kvm_irqfds_allowed = true;
1084 kvm_gsi_routing_allowed = true;
1085 kvm_halt_in_kernel_allowed = false;
1089 int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
1090 int vq, bool assign)
1092 struct kvm_ioeventfd kick = {
1093 .flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY |
1094 KVM_IOEVENTFD_FLAG_DATAMATCH,
1095 .fd = event_notifier_get_fd(notifier),
1100 if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
1104 kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
1106 return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);