2 * QEMU PowerPC sPAPR XIVE interrupt controller model
4 * Copyright (c) 2017-2019, IBM Corporation.
6 * This code is licensed under the GPL version 2 or later. See the
7 * COPYING file in the top-level directory.
10 #include "qemu/osdep.h"
12 #include "qemu/error-report.h"
13 #include "qapi/error.h"
14 #include "target/ppc/cpu.h"
15 #include "sysemu/cpus.h"
16 #include "sysemu/kvm.h"
17 #include "hw/ppc/spapr.h"
18 #include "hw/ppc/spapr_cpu_core.h"
19 #include "hw/ppc/spapr_xive.h"
20 #include "hw/ppc/xive.h"
23 #include <sys/ioctl.h>
26 * Helpers for CPU hotplug
28 * TODO: make a common KVMEnabledCPU layer for XICS and XIVE
30 typedef struct KVMEnabledCPU
{
31 unsigned long vcpu_id
;
32 QLIST_ENTRY(KVMEnabledCPU
) node
;
35 static QLIST_HEAD(, KVMEnabledCPU
)
36 kvm_enabled_cpus
= QLIST_HEAD_INITIALIZER(&kvm_enabled_cpus
);
38 static bool kvm_cpu_is_enabled(CPUState
*cs
)
40 KVMEnabledCPU
*enabled_cpu
;
41 unsigned long vcpu_id
= kvm_arch_vcpu_id(cs
);
43 QLIST_FOREACH(enabled_cpu
, &kvm_enabled_cpus
, node
) {
44 if (enabled_cpu
->vcpu_id
== vcpu_id
) {
51 static void kvm_cpu_enable(CPUState
*cs
)
53 KVMEnabledCPU
*enabled_cpu
;
54 unsigned long vcpu_id
= kvm_arch_vcpu_id(cs
);
56 enabled_cpu
= g_malloc(sizeof(*enabled_cpu
));
57 enabled_cpu
->vcpu_id
= vcpu_id
;
58 QLIST_INSERT_HEAD(&kvm_enabled_cpus
, enabled_cpu
, node
);
61 static void kvm_cpu_disable_all(void)
63 KVMEnabledCPU
*enabled_cpu
, *next
;
65 QLIST_FOREACH_SAFE(enabled_cpu
, &kvm_enabled_cpus
, node
, next
) {
66 QLIST_REMOVE(enabled_cpu
, node
);
72 * XIVE Thread Interrupt Management context (KVM)
75 void kvmppc_xive_cpu_set_state(XiveTCTX
*tctx
, Error
**errp
)
77 SpaprXive
*xive
= SPAPR_MACHINE(qdev_get_machine())->xive
;
81 /* The KVM XIVE device is not in use yet */
86 /* word0 and word1 of the OS ring. */
87 state
[0] = *((uint64_t *) &tctx
->regs
[TM_QW1_OS
]);
89 ret
= kvm_set_one_reg(tctx
->cs
, KVM_REG_PPC_VP_STATE
, state
);
91 error_setg_errno(errp
, errno
,
92 "XIVE: could not restore KVM state of CPU %ld",
93 kvm_arch_vcpu_id(tctx
->cs
));
97 void kvmppc_xive_cpu_get_state(XiveTCTX
*tctx
, Error
**errp
)
99 SpaprXive
*xive
= SPAPR_MACHINE(qdev_get_machine())->xive
;
100 uint64_t state
[2] = { 0 };
103 /* The KVM XIVE device is not in use */
104 if (xive
->fd
== -1) {
108 ret
= kvm_get_one_reg(tctx
->cs
, KVM_REG_PPC_VP_STATE
, state
);
110 error_setg_errno(errp
, errno
,
111 "XIVE: could not capture KVM state of CPU %ld",
112 kvm_arch_vcpu_id(tctx
->cs
));
116 /* word0 and word1 of the OS ring. */
117 *((uint64_t *) &tctx
->regs
[TM_QW1_OS
]) = state
[0];
125 static void kvmppc_xive_cpu_do_synchronize_state(CPUState
*cpu
,
128 XiveCpuGetState
*s
= arg
.host_ptr
;
130 kvmppc_xive_cpu_get_state(s
->tctx
, &s
->err
);
133 void kvmppc_xive_cpu_synchronize_state(XiveTCTX
*tctx
, Error
**errp
)
135 XiveCpuGetState s
= {
141 * Kick the vCPU to make sure they are available for the KVM ioctl.
143 run_on_cpu(tctx
->cs
, kvmppc_xive_cpu_do_synchronize_state
,
144 RUN_ON_CPU_HOST_PTR(&s
));
147 error_propagate(errp
, s
.err
);
152 void kvmppc_xive_cpu_connect(XiveTCTX
*tctx
, Error
**errp
)
154 SpaprXive
*xive
= SPAPR_MACHINE(qdev_get_machine())->xive
;
155 unsigned long vcpu_id
;
158 /* The KVM XIVE device is not in use */
159 if (xive
->fd
== -1) {
163 /* Check if CPU was hot unplugged and replugged. */
164 if (kvm_cpu_is_enabled(tctx
->cs
)) {
168 vcpu_id
= kvm_arch_vcpu_id(tctx
->cs
);
170 ret
= kvm_vcpu_enable_cap(tctx
->cs
, KVM_CAP_PPC_IRQ_XIVE
, 0, xive
->fd
,
173 error_setg(errp
, "XIVE: unable to connect CPU%ld to KVM device: %s",
174 vcpu_id
, strerror(errno
));
178 kvm_cpu_enable(tctx
->cs
);
182 * XIVE Interrupt Source (KVM)
185 void kvmppc_xive_set_source_config(SpaprXive
*xive
, uint32_t lisn
, XiveEAS
*eas
,
195 Error
*local_err
= NULL
;
197 assert(xive_eas_is_valid(eas
));
199 end_idx
= xive_get_field64(EAS_END_INDEX
, eas
->w
);
200 end_blk
= xive_get_field64(EAS_END_BLOCK
, eas
->w
);
201 eisn
= xive_get_field64(EAS_END_DATA
, eas
->w
);
202 masked
= xive_eas_is_masked(eas
);
204 spapr_xive_end_to_target(end_blk
, end_idx
, &server
, &priority
);
206 kvm_src
= priority
<< KVM_XIVE_SOURCE_PRIORITY_SHIFT
&
207 KVM_XIVE_SOURCE_PRIORITY_MASK
;
208 kvm_src
|= server
<< KVM_XIVE_SOURCE_SERVER_SHIFT
&
209 KVM_XIVE_SOURCE_SERVER_MASK
;
210 kvm_src
|= ((uint64_t) masked
<< KVM_XIVE_SOURCE_MASKED_SHIFT
) &
211 KVM_XIVE_SOURCE_MASKED_MASK
;
212 kvm_src
|= ((uint64_t)eisn
<< KVM_XIVE_SOURCE_EISN_SHIFT
) &
213 KVM_XIVE_SOURCE_EISN_MASK
;
215 kvm_device_access(xive
->fd
, KVM_DEV_XIVE_GRP_SOURCE_CONFIG
, lisn
,
216 &kvm_src
, true, &local_err
);
218 error_propagate(errp
, local_err
);
223 void kvmppc_xive_sync_source(SpaprXive
*xive
, uint32_t lisn
, Error
**errp
)
225 kvm_device_access(xive
->fd
, KVM_DEV_XIVE_GRP_SOURCE_SYNC
, lisn
,
230 * At reset, the interrupt sources are simply created and MASKED. We
231 * only need to inform the KVM XIVE device about their type: LSI or
234 void kvmppc_xive_source_reset_one(XiveSource
*xsrc
, int srcno
, Error
**errp
)
236 SpaprXive
*xive
= SPAPR_XIVE(xsrc
->xive
);
239 /* The KVM XIVE device is not in use */
240 if (xive
->fd
== -1) {
244 if (xive_source_irq_is_lsi(xsrc
, srcno
)) {
245 state
|= KVM_XIVE_LEVEL_SENSITIVE
;
246 if (xsrc
->status
[srcno
] & XIVE_STATUS_ASSERTED
) {
247 state
|= KVM_XIVE_LEVEL_ASSERTED
;
251 kvm_device_access(xive
->fd
, KVM_DEV_XIVE_GRP_SOURCE
, srcno
, &state
,
255 static void kvmppc_xive_source_reset(XiveSource
*xsrc
, Error
**errp
)
259 for (i
= 0; i
< xsrc
->nr_irqs
; i
++) {
260 Error
*local_err
= NULL
;
262 kvmppc_xive_source_reset_one(xsrc
, i
, &local_err
);
264 error_propagate(errp
, local_err
);
271 * This is used to perform the magic loads on the ESB pages, described
274 * Memory barriers should not be needed for loads (no store for now).
276 static uint64_t xive_esb_rw(XiveSource
*xsrc
, int srcno
, uint32_t offset
,
277 uint64_t data
, bool write
)
279 uint64_t *addr
= xsrc
->esb_mmap
+ xive_source_esb_mgmt(xsrc
, srcno
) +
283 *addr
= cpu_to_be64(data
);
286 /* Prevent the compiler from optimizing away the load */
287 volatile uint64_t value
= be64_to_cpu(*addr
);
292 static uint8_t xive_esb_read(XiveSource
*xsrc
, int srcno
, uint32_t offset
)
294 return xive_esb_rw(xsrc
, srcno
, offset
, 0, 0) & 0x3;
297 static void xive_esb_trigger(XiveSource
*xsrc
, int srcno
)
299 uint64_t *addr
= xsrc
->esb_mmap
+ xive_source_esb_page(xsrc
, srcno
);
304 uint64_t kvmppc_xive_esb_rw(XiveSource
*xsrc
, int srcno
, uint32_t offset
,
305 uint64_t data
, bool write
)
308 return xive_esb_rw(xsrc
, srcno
, offset
, data
, 1);
312 * Special Load EOI handling for LSI sources. Q bit is never set
313 * and the interrupt should be re-triggered if the level is still
316 if (xive_source_irq_is_lsi(xsrc
, srcno
) &&
317 offset
== XIVE_ESB_LOAD_EOI
) {
318 xive_esb_read(xsrc
, srcno
, XIVE_ESB_SET_PQ_00
);
319 if (xsrc
->status
[srcno
] & XIVE_STATUS_ASSERTED
) {
320 xive_esb_trigger(xsrc
, srcno
);
324 return xive_esb_rw(xsrc
, srcno
, offset
, 0, 0);
328 static void kvmppc_xive_source_get_state(XiveSource
*xsrc
)
332 for (i
= 0; i
< xsrc
->nr_irqs
; i
++) {
333 /* Perform a load without side effect to retrieve the PQ bits */
334 uint8_t pq
= xive_esb_read(xsrc
, i
, XIVE_ESB_GET
);
336 /* and save PQ locally */
337 xive_source_esb_set(xsrc
, i
, pq
);
341 void kvmppc_xive_source_set_irq(void *opaque
, int srcno
, int val
)
343 XiveSource
*xsrc
= opaque
;
344 SpaprXive
*xive
= SPAPR_XIVE(xsrc
->xive
);
345 struct kvm_irq_level args
;
348 /* The KVM XIVE device should be in use */
349 assert(xive
->fd
!= -1);
352 if (!xive_source_irq_is_lsi(xsrc
, srcno
)) {
356 args
.level
= KVM_INTERRUPT_SET
;
359 xsrc
->status
[srcno
] |= XIVE_STATUS_ASSERTED
;
360 args
.level
= KVM_INTERRUPT_SET_LEVEL
;
362 xsrc
->status
[srcno
] &= ~XIVE_STATUS_ASSERTED
;
363 args
.level
= KVM_INTERRUPT_UNSET
;
366 rc
= kvm_vm_ioctl(kvm_state
, KVM_IRQ_LINE
, &args
);
368 error_report("XIVE: kvm_irq_line() failed : %s", strerror(errno
));
373 * sPAPR XIVE interrupt controller (KVM)
375 void kvmppc_xive_get_queue_config(SpaprXive
*xive
, uint8_t end_blk
,
376 uint32_t end_idx
, XiveEND
*end
,
379 struct kvm_ppc_xive_eq kvm_eq
= { 0 };
383 Error
*local_err
= NULL
;
385 assert(xive_end_is_valid(end
));
387 /* Encode the tuple (server, prio) as a KVM EQ index */
388 spapr_xive_end_to_target(end_blk
, end_idx
, &server
, &priority
);
390 kvm_eq_idx
= priority
<< KVM_XIVE_EQ_PRIORITY_SHIFT
&
391 KVM_XIVE_EQ_PRIORITY_MASK
;
392 kvm_eq_idx
|= server
<< KVM_XIVE_EQ_SERVER_SHIFT
&
393 KVM_XIVE_EQ_SERVER_MASK
;
395 kvm_device_access(xive
->fd
, KVM_DEV_XIVE_GRP_EQ_CONFIG
, kvm_eq_idx
,
396 &kvm_eq
, false, &local_err
);
398 error_propagate(errp
, local_err
);
403 * The EQ index and toggle bit are updated by HW. These are the
404 * only fields from KVM we want to update QEMU with. The other END
405 * fields should already be in the QEMU END table.
407 end
->w1
= xive_set_field32(END_W1_GENERATION
, 0ul, kvm_eq
.qtoggle
) |
408 xive_set_field32(END_W1_PAGE_OFF
, 0ul, kvm_eq
.qindex
);
411 void kvmppc_xive_set_queue_config(SpaprXive
*xive
, uint8_t end_blk
,
412 uint32_t end_idx
, XiveEND
*end
,
415 struct kvm_ppc_xive_eq kvm_eq
= { 0 };
419 Error
*local_err
= NULL
;
422 * Build the KVM state from the local END structure.
426 if (xive_get_field32(END_W0_UCOND_NOTIFY
, end
->w0
)) {
427 kvm_eq
.flags
|= KVM_XIVE_EQ_ALWAYS_NOTIFY
;
431 * If the hcall is disabling the EQ, set the size and page address
432 * to zero. When migrating, only valid ENDs are taken into
435 if (xive_end_is_valid(end
)) {
436 kvm_eq
.qshift
= xive_get_field32(END_W0_QSIZE
, end
->w0
) + 12;
437 kvm_eq
.qaddr
= xive_end_qaddr(end
);
439 * The EQ toggle bit and index should only be relevant when
440 * restoring the EQ state
442 kvm_eq
.qtoggle
= xive_get_field32(END_W1_GENERATION
, end
->w1
);
443 kvm_eq
.qindex
= xive_get_field32(END_W1_PAGE_OFF
, end
->w1
);
449 /* Encode the tuple (server, prio) as a KVM EQ index */
450 spapr_xive_end_to_target(end_blk
, end_idx
, &server
, &priority
);
452 kvm_eq_idx
= priority
<< KVM_XIVE_EQ_PRIORITY_SHIFT
&
453 KVM_XIVE_EQ_PRIORITY_MASK
;
454 kvm_eq_idx
|= server
<< KVM_XIVE_EQ_SERVER_SHIFT
&
455 KVM_XIVE_EQ_SERVER_MASK
;
457 kvm_device_access(xive
->fd
, KVM_DEV_XIVE_GRP_EQ_CONFIG
, kvm_eq_idx
,
458 &kvm_eq
, true, &local_err
);
460 error_propagate(errp
, local_err
);
465 void kvmppc_xive_reset(SpaprXive
*xive
, Error
**errp
)
467 kvm_device_access(xive
->fd
, KVM_DEV_XIVE_GRP_CTRL
, KVM_DEV_XIVE_RESET
,
471 static void kvmppc_xive_get_queues(SpaprXive
*xive
, Error
**errp
)
473 Error
*local_err
= NULL
;
476 for (i
= 0; i
< xive
->nr_ends
; i
++) {
477 if (!xive_end_is_valid(&xive
->endt
[i
])) {
481 kvmppc_xive_get_queue_config(xive
, SPAPR_XIVE_BLOCK_ID
, i
,
482 &xive
->endt
[i
], &local_err
);
484 error_propagate(errp
, local_err
);
491 * The primary goal of the XIVE VM change handler is to mark the EQ
492 * pages dirty when all XIVE event notifications have stopped.
494 * Whenever the VM is stopped, the VM change handler sets the source
495 * PQs to PENDING to stop the flow of events and to possibly catch a
496 * triggered interrupt occuring while the VM is stopped. The previous
497 * state is saved in anticipation of a migration. The XIVE controller
498 * is then synced through KVM to flush any in-flight event
499 * notification and stabilize the EQs.
501 * At this stage, we can mark the EQ page dirty and let a migration
502 * sequence transfer the EQ pages to the destination, which is done
503 * just after the stop state.
505 * The previous configuration of the sources is restored when the VM
506 * runs again. If an interrupt was queued while the VM was stopped,
507 * simply generate a trigger.
509 static void kvmppc_xive_change_state_handler(void *opaque
, int running
,
512 SpaprXive
*xive
= opaque
;
513 XiveSource
*xsrc
= &xive
->source
;
514 Error
*local_err
= NULL
;
518 * Restore the sources to their initial state. This is called when
519 * the VM resumes after a stop or a migration.
522 for (i
= 0; i
< xsrc
->nr_irqs
; i
++) {
523 uint8_t pq
= xive_source_esb_get(xsrc
, i
);
526 old_pq
= xive_esb_read(xsrc
, i
, XIVE_ESB_SET_PQ_00
+ (pq
<< 8));
529 * An interrupt was queued while the VM was stopped,
530 * generate a trigger.
532 if (pq
== XIVE_ESB_RESET
&& old_pq
== XIVE_ESB_QUEUED
) {
533 xive_esb_trigger(xsrc
, i
);
541 * Mask the sources, to stop the flow of event notifications, and
542 * save the PQs locally in the XiveSource object. The XiveSource
543 * state will be collected later on by its vmstate handler if a
544 * migration is in progress.
546 for (i
= 0; i
< xsrc
->nr_irqs
; i
++) {
547 uint8_t pq
= xive_esb_read(xsrc
, i
, XIVE_ESB_GET
);
550 * PQ is set to PENDING to possibly catch a triggered
551 * interrupt occuring while the VM is stopped (hotplug event
554 if (pq
!= XIVE_ESB_OFF
) {
555 pq
= xive_esb_read(xsrc
, i
, XIVE_ESB_SET_PQ_10
);
557 xive_source_esb_set(xsrc
, i
, pq
);
561 * Sync the XIVE controller in KVM, to flush in-flight event
562 * notification that should be enqueued in the EQs and mark the
563 * XIVE EQ pages dirty to collect all updates.
565 kvm_device_access(xive
->fd
, KVM_DEV_XIVE_GRP_CTRL
,
566 KVM_DEV_XIVE_EQ_SYNC
, NULL
, true, &local_err
);
568 error_report_err(local_err
);
573 void kvmppc_xive_synchronize_state(SpaprXive
*xive
, Error
**errp
)
575 /* The KVM XIVE device is not in use */
576 if (xive
->fd
== -1) {
581 * When the VM is stopped, the sources are masked and the previous
582 * state is saved in anticipation of a migration. We should not
583 * synchronize the source state in that case else we will override
586 if (runstate_is_running()) {
587 kvmppc_xive_source_get_state(&xive
->source
);
590 /* EAT: there is no extra state to query from KVM */
593 kvmppc_xive_get_queues(xive
, errp
);
597 * The SpaprXive 'pre_save' method is called by the vmstate handler of
598 * the SpaprXive model, after the XIVE controller is synced in the VM
601 int kvmppc_xive_pre_save(SpaprXive
*xive
)
603 Error
*local_err
= NULL
;
605 /* The KVM XIVE device is not in use */
606 if (xive
->fd
== -1) {
610 /* EAT: there is no extra state to query from KVM */
613 kvmppc_xive_get_queues(xive
, &local_err
);
615 error_report_err(local_err
);
623 * The SpaprXive 'post_load' method is not called by a vmstate
624 * handler. It is called at the sPAPR machine level at the end of the
625 * migration sequence by the sPAPR IRQ backend 'post_load' method,
626 * when all XIVE states have been transferred and loaded.
628 int kvmppc_xive_post_load(SpaprXive
*xive
, int version_id
)
630 Error
*local_err
= NULL
;
634 /* The KVM XIVE device should be in use */
635 assert(xive
->fd
!= -1);
637 /* Restore the ENDT first. The targetting depends on it. */
638 for (i
= 0; i
< xive
->nr_ends
; i
++) {
639 if (!xive_end_is_valid(&xive
->endt
[i
])) {
643 kvmppc_xive_set_queue_config(xive
, SPAPR_XIVE_BLOCK_ID
, i
,
644 &xive
->endt
[i
], &local_err
);
646 error_report_err(local_err
);
651 /* Restore the EAT */
652 for (i
= 0; i
< xive
->nr_irqs
; i
++) {
653 if (!xive_eas_is_valid(&xive
->eat
[i
])) {
657 kvmppc_xive_set_source_config(xive
, i
, &xive
->eat
[i
], &local_err
);
659 error_report_err(local_err
);
665 * Restore the thread interrupt contexts of initial CPUs.
667 * The context of hotplugged CPUs is restored later, by the
668 * 'post_load' handler of the XiveTCTX model because they are not
669 * available at the time the SpaprXive 'post_load' method is
670 * called. We can not restore the context of all CPUs in the
671 * 'post_load' handler of XiveTCTX because the machine is not
672 * necessarily connected to the KVM device at that time.
675 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
677 kvmppc_xive_cpu_set_state(spapr_cpu_state(cpu
)->tctx
, &local_err
);
679 error_report_err(local_err
);
684 /* The source states will be restored when the machine starts running */
688 static void *kvmppc_xive_mmap(SpaprXive
*xive
, int pgoff
, size_t len
,
692 uint32_t page_shift
= 16; /* TODO: fix page_shift */
694 addr
= mmap(NULL
, len
, PROT_WRITE
| PROT_READ
, MAP_SHARED
, xive
->fd
,
695 pgoff
<< page_shift
);
696 if (addr
== MAP_FAILED
) {
697 error_setg_errno(errp
, errno
, "XIVE: unable to set memory mapping");
705 * All the XIVE memory regions are now backed by mappings from the KVM
708 void kvmppc_xive_connect(SpaprXive
*xive
, Error
**errp
)
710 XiveSource
*xsrc
= &xive
->source
;
711 Error
*local_err
= NULL
;
712 size_t esb_len
= (1ull << xsrc
->esb_shift
) * xsrc
->nr_irqs
;
713 size_t tima_len
= 4ull << TM_SHIFT
;
717 * The KVM XIVE device already in use. This is the case when
718 * rebooting under the XIVE-only interrupt mode.
720 if (xive
->fd
!= -1) {
724 if (!kvmppc_has_cap_xive()) {
725 error_setg(errp
, "IRQ_XIVE capability must be present for KVM");
729 /* First, create the KVM XIVE device */
730 xive
->fd
= kvm_create_device(kvm_state
, KVM_DEV_TYPE_XIVE
, false);
732 error_setg_errno(errp
, -xive
->fd
, "XIVE: error creating KVM device");
737 * 1. Source ESB pages - KVM mapping
739 xsrc
->esb_mmap
= kvmppc_xive_mmap(xive
, KVM_XIVE_ESB_PAGE_OFFSET
, esb_len
,
745 memory_region_init_ram_device_ptr(&xsrc
->esb_mmio_kvm
, OBJECT(xsrc
),
746 "xive.esb", esb_len
, xsrc
->esb_mmap
);
747 memory_region_add_subregion_overlap(&xsrc
->esb_mmio
, 0,
748 &xsrc
->esb_mmio_kvm
, 1);
751 * 2. END ESB pages (No KVM support yet)
755 * 3. TIMA pages - KVM mapping
757 xive
->tm_mmap
= kvmppc_xive_mmap(xive
, KVM_XIVE_TIMA_PAGE_OFFSET
, tima_len
,
762 memory_region_init_ram_device_ptr(&xive
->tm_mmio_kvm
, OBJECT(xive
),
763 "xive.tima", tima_len
, xive
->tm_mmap
);
764 memory_region_add_subregion_overlap(&xive
->tm_mmio
, 0,
765 &xive
->tm_mmio_kvm
, 1);
767 xive
->change
= qemu_add_vm_change_state_handler(
768 kvmppc_xive_change_state_handler
, xive
);
770 /* Connect the presenters to the initial VCPUs of the machine */
772 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
774 kvmppc_xive_cpu_connect(spapr_cpu_state(cpu
)->tctx
, &local_err
);
780 /* Update the KVM sources */
781 kvmppc_xive_source_reset(xsrc
, &local_err
);
786 kvm_kernel_irqchip
= true;
787 kvm_msi_via_irqfd_allowed
= true;
788 kvm_gsi_direct_mapping
= true;
792 error_propagate(errp
, local_err
);
793 kvmppc_xive_disconnect(xive
, NULL
);
796 void kvmppc_xive_disconnect(SpaprXive
*xive
, Error
**errp
)
801 /* The KVM XIVE device is not in use */
802 if (!xive
|| xive
->fd
== -1) {
806 if (!kvmppc_has_cap_xive()) {
807 error_setg(errp
, "IRQ_XIVE capability must be present for KVM");
811 /* Clear the KVM mapping */
812 xsrc
= &xive
->source
;
813 esb_len
= (1ull << xsrc
->esb_shift
) * xsrc
->nr_irqs
;
815 if (xsrc
->esb_mmap
) {
816 memory_region_del_subregion(&xsrc
->esb_mmio
, &xsrc
->esb_mmio_kvm
);
817 object_unparent(OBJECT(&xsrc
->esb_mmio_kvm
));
818 munmap(xsrc
->esb_mmap
, esb_len
);
819 xsrc
->esb_mmap
= NULL
;
823 memory_region_del_subregion(&xive
->tm_mmio
, &xive
->tm_mmio_kvm
);
824 object_unparent(OBJECT(&xive
->tm_mmio_kvm
));
825 munmap(xive
->tm_mmap
, 4ull << TM_SHIFT
);
826 xive
->tm_mmap
= NULL
;
830 * When the KVM device fd is closed, the KVM device is destroyed
831 * and removed from the list of devices of the VM. The VCPU
832 * presenters are also detached from the device.
834 if (xive
->fd
!= -1) {
839 kvm_kernel_irqchip
= false;
840 kvm_msi_via_irqfd_allowed
= false;
841 kvm_gsi_direct_mapping
= false;
843 /* Clear the local list of presenter (hotplug) */
844 kvm_cpu_disable_all();
846 /* VM Change state handler is not needed anymore */
848 qemu_del_vm_change_state_handler(xive
->change
);