1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2017-2019, IBM Corporation.
6 #define pr_fmt(fmt) "xive-kvm: " fmt
8 #include <linux/kernel.h>
9 #include <linux/kvm_host.h>
10 #include <linux/err.h>
11 #include <linux/gfp.h>
12 #include <linux/spinlock.h>
13 #include <linux/delay.h>
14 #include <linux/file.h>
15 #include <asm/uaccess.h>
16 #include <asm/kvm_book3s.h>
17 #include <asm/kvm_ppc.h>
18 #include <asm/hvcall.h>
20 #include <asm/xive-regs.h>
21 #include <asm/debug.h>
22 #include <asm/debugfs.h>
25 #include <linux/debugfs.h>
26 #include <linux/seq_file.h>
28 #include "book3s_xive.h"
30 static u8 xive_vm_esb_load(struct xive_irq_data *xd, u32 offset)
35 * The KVM XIVE native device does not use the XIVE_ESB_SET_PQ_10
36 * load operation, so there is no need to enforce load-after-store
40 val = in_be64(xd->eoi_mmio + offset);
44 static void kvmppc_xive_native_cleanup_queue(struct kvm_vcpu *vcpu, int prio)
46 struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
47 struct xive_q *q = &xc->queues[prio];
49 xive_native_disable_queue(xc->vp_id, q, prio);
51 put_page(virt_to_page(q->qpage));
56 static int kvmppc_xive_native_configure_queue(u32 vp_id, struct xive_q *q,
57 u8 prio, __be32 *qpage,
58 u32 order, bool can_escalate)
61 __be32 *qpage_prev = q->qpage;
63 rc = xive_native_configure_queue(vp_id, q, prio, qpage, order,
69 put_page(virt_to_page(qpage_prev));
74 void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu)
76 struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
79 if (!kvmppc_xive_enabled(vcpu))
85 pr_devel("native_cleanup_vcpu(cpu=%d)\n", xc->server_num);
87 /* Ensure no interrupt is still routed to that VP */
89 kvmppc_xive_disable_vcpu_interrupts(vcpu);
91 /* Free escalations */
92 for (i = 0; i < KVMPPC_XIVE_Q_COUNT; i++) {
93 /* Free the escalation irq */
94 if (xc->esc_virq[i]) {
95 if (xc->xive->single_escalation)
96 xive_cleanup_single_escalation(vcpu, xc,
98 free_irq(xc->esc_virq[i], vcpu);
99 irq_dispose_mapping(xc->esc_virq[i]);
100 kfree(xc->esc_virq_names[i]);
106 xive_native_disable_vp(xc->vp_id);
108 /* Clear the cam word so guest entry won't try to push context */
109 vcpu->arch.xive_cam_word = 0;
111 /* Free the queues */
112 for (i = 0; i < KVMPPC_XIVE_Q_COUNT; i++) {
113 kvmppc_xive_native_cleanup_queue(vcpu, i);
119 /* Cleanup the vcpu */
120 vcpu->arch.irq_type = KVMPPC_IRQ_DEFAULT;
121 vcpu->arch.xive_vcpu = NULL;
124 int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
125 struct kvm_vcpu *vcpu, u32 server_num)
127 struct kvmppc_xive *xive = dev->private;
128 struct kvmppc_xive_vcpu *xc = NULL;
132 pr_devel("native_connect_vcpu(server=%d)\n", server_num);
134 if (dev->ops != &kvm_xive_native_ops) {
135 pr_devel("Wrong ops !\n");
138 if (xive->kvm != vcpu->kvm)
140 if (vcpu->arch.irq_type != KVMPPC_IRQ_DEFAULT)
143 mutex_lock(&xive->lock);
145 rc = kvmppc_xive_compute_vp_id(xive, server_num, &vp_id);
149 xc = kzalloc(sizeof(*xc), GFP_KERNEL);
155 vcpu->arch.xive_vcpu = xc;
158 xc->server_num = server_num;
162 vcpu->arch.irq_type = KVMPPC_IRQ_XIVE;
164 rc = xive_native_get_vp_info(xc->vp_id, &xc->vp_cam, &xc->vp_chip_id);
166 pr_err("Failed to get VP info from OPAL: %d\n", rc);
171 * Enable the VP first as the single escalation mode will
172 * affect escalation interrupts numbering
174 rc = xive_native_enable_vp(xc->vp_id, xive->single_escalation);
176 pr_err("Failed to enable VP in OPAL: %d\n", rc);
180 /* Configure VCPU fields for use by assembly push/pull */
181 vcpu->arch.xive_saved_state.w01 = cpu_to_be64(0xff000000);
182 vcpu->arch.xive_cam_word = cpu_to_be32(xc->vp_cam | TM_QW1W2_VO);
184 /* TODO: reset all queues to a clean state ? */
186 mutex_unlock(&xive->lock);
188 kvmppc_xive_native_cleanup_vcpu(vcpu);
194 * Device passthrough support
196 static int kvmppc_xive_native_reset_mapped(struct kvm *kvm, unsigned long irq)
198 struct kvmppc_xive *xive = kvm->arch.xive;
199 pgoff_t esb_pgoff = KVM_XIVE_ESB_PAGE_OFFSET + irq * 2;
201 if (irq >= KVMPPC_XIVE_NR_IRQS)
205 * Clear the ESB pages of the IRQ number being mapped (or
206 * unmapped) into the guest and let the the VM fault handler
207 * repopulate with the appropriate ESB pages (device or IC)
209 pr_debug("clearing esb pages for girq 0x%lx\n", irq);
210 mutex_lock(&xive->mapping_lock);
212 unmap_mapping_range(xive->mapping,
213 esb_pgoff << PAGE_SHIFT,
214 2ull << PAGE_SHIFT, 1);
215 mutex_unlock(&xive->mapping_lock);
219 static struct kvmppc_xive_ops kvmppc_xive_native_ops = {
220 .reset_mapped = kvmppc_xive_native_reset_mapped,
223 static vm_fault_t xive_native_esb_fault(struct vm_fault *vmf)
225 struct vm_area_struct *vma = vmf->vma;
226 struct kvm_device *dev = vma->vm_file->private_data;
227 struct kvmppc_xive *xive = dev->private;
228 struct kvmppc_xive_src_block *sb;
229 struct kvmppc_xive_irq_state *state;
230 struct xive_irq_data *xd;
238 * Linux/KVM uses a two pages ESB setting, one for trigger and
241 page_offset = vmf->pgoff - vma->vm_pgoff;
242 irq = page_offset / 2;
244 sb = kvmppc_xive_find_source(xive, irq, &src);
246 pr_devel("%s: source %lx not found !\n", __func__, irq);
247 return VM_FAULT_SIGBUS;
250 state = &sb->irq_state[src];
252 /* Some sanity checking */
254 pr_devel("%s: source %lx invalid !\n", __func__, irq);
255 return VM_FAULT_SIGBUS;
258 kvmppc_xive_select_irq(state, &hw_num, &xd);
260 arch_spin_lock(&sb->lock);
263 * first/even page is for trigger
264 * second/odd page is for EOI and management.
266 page = page_offset % 2 ? xd->eoi_page : xd->trig_page;
267 arch_spin_unlock(&sb->lock);
269 if (WARN_ON(!page)) {
270 pr_err("%s: accessing invalid ESB page for source %lx !\n",
272 return VM_FAULT_SIGBUS;
275 vmf_insert_pfn(vma, vmf->address, page >> PAGE_SHIFT);
276 return VM_FAULT_NOPAGE;
279 static const struct vm_operations_struct xive_native_esb_vmops = {
280 .fault = xive_native_esb_fault,
283 static vm_fault_t xive_native_tima_fault(struct vm_fault *vmf)
285 struct vm_area_struct *vma = vmf->vma;
287 switch (vmf->pgoff - vma->vm_pgoff) {
288 case 0: /* HW - forbid access */
289 case 1: /* HV - forbid access */
290 return VM_FAULT_SIGBUS;
292 vmf_insert_pfn(vma, vmf->address, xive_tima_os >> PAGE_SHIFT);
293 return VM_FAULT_NOPAGE;
294 case 3: /* USER - TODO */
296 return VM_FAULT_SIGBUS;
300 static const struct vm_operations_struct xive_native_tima_vmops = {
301 .fault = xive_native_tima_fault,
304 static int kvmppc_xive_native_mmap(struct kvm_device *dev,
305 struct vm_area_struct *vma)
307 struct kvmppc_xive *xive = dev->private;
309 /* We only allow mappings at fixed offset for now */
310 if (vma->vm_pgoff == KVM_XIVE_TIMA_PAGE_OFFSET) {
311 if (vma_pages(vma) > 4)
313 vma->vm_ops = &xive_native_tima_vmops;
314 } else if (vma->vm_pgoff == KVM_XIVE_ESB_PAGE_OFFSET) {
315 if (vma_pages(vma) > KVMPPC_XIVE_NR_IRQS * 2)
317 vma->vm_ops = &xive_native_esb_vmops;
322 vma->vm_flags |= VM_IO | VM_PFNMAP;
323 vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot);
326 * Grab the KVM device file address_space to be able to clear
327 * the ESB pages mapping when a device is passed-through into
330 xive->mapping = vma->vm_file->f_mapping;
334 static int kvmppc_xive_native_set_source(struct kvmppc_xive *xive, long irq,
337 struct kvmppc_xive_src_block *sb;
338 struct kvmppc_xive_irq_state *state;
339 u64 __user *ubufp = (u64 __user *) addr;
344 pr_devel("%s irq=0x%lx\n", __func__, irq);
346 if (irq < KVMPPC_XIVE_FIRST_IRQ || irq >= KVMPPC_XIVE_NR_IRQS)
349 sb = kvmppc_xive_find_source(xive, irq, &idx);
351 pr_debug("No source, creating source block...\n");
352 sb = kvmppc_xive_create_src_block(xive, irq);
354 pr_err("Failed to create block...\n");
358 state = &sb->irq_state[idx];
360 if (get_user(val, ubufp)) {
361 pr_err("fault getting user info !\n");
365 arch_spin_lock(&sb->lock);
368 * If the source doesn't already have an IPI, allocate
369 * one and get the corresponding data
371 if (!state->ipi_number) {
372 state->ipi_number = xive_native_alloc_irq();
373 if (state->ipi_number == 0) {
374 pr_err("Failed to allocate IRQ !\n");
378 xive_native_populate_irq_data(state->ipi_number,
380 pr_debug("%s allocated hw_irq=0x%x for irq=0x%lx\n", __func__,
381 state->ipi_number, irq);
384 /* Restore LSI state */
385 if (val & KVM_XIVE_LEVEL_SENSITIVE) {
387 if (val & KVM_XIVE_LEVEL_ASSERTED)
388 state->asserted = true;
389 pr_devel(" LSI ! Asserted=%d\n", state->asserted);
392 /* Mask IRQ to start with */
393 state->act_server = 0;
394 state->act_priority = MASKED;
395 xive_vm_esb_load(&state->ipi_data, XIVE_ESB_SET_PQ_01);
396 xive_native_configure_irq(state->ipi_number, 0, MASKED, 0);
398 /* Increment the number of valid sources and mark this one valid */
406 arch_spin_unlock(&sb->lock);
411 static int kvmppc_xive_native_update_source_config(struct kvmppc_xive *xive,
412 struct kvmppc_xive_src_block *sb,
413 struct kvmppc_xive_irq_state *state,
414 u32 server, u8 priority, bool masked,
417 struct kvm *kvm = xive->kvm;
421 arch_spin_lock(&sb->lock);
423 if (state->act_server == server && state->act_priority == priority &&
427 pr_devel("new_act_prio=%d new_act_server=%d mask=%d act_server=%d act_prio=%d\n",
428 priority, server, masked, state->act_server,
429 state->act_priority);
431 kvmppc_xive_select_irq(state, &hw_num, NULL);
433 if (priority != MASKED && !masked) {
434 rc = kvmppc_xive_select_target(kvm, &server, priority);
438 state->act_priority = priority;
439 state->act_server = server;
442 rc = xive_native_configure_irq(hw_num,
443 kvmppc_xive_vp(xive, server),
446 state->act_priority = MASKED;
447 state->act_server = 0;
450 rc = xive_native_configure_irq(hw_num, 0, MASKED, 0);
454 arch_spin_unlock(&sb->lock);
458 static int kvmppc_xive_native_set_source_config(struct kvmppc_xive *xive,
461 struct kvmppc_xive_src_block *sb;
462 struct kvmppc_xive_irq_state *state;
463 u64 __user *ubufp = (u64 __user *) addr;
471 sb = kvmppc_xive_find_source(xive, irq, &src);
475 state = &sb->irq_state[src];
480 if (get_user(kvm_cfg, ubufp))
483 pr_devel("%s irq=0x%lx cfg=%016llx\n", __func__, irq, kvm_cfg);
485 priority = (kvm_cfg & KVM_XIVE_SOURCE_PRIORITY_MASK) >>
486 KVM_XIVE_SOURCE_PRIORITY_SHIFT;
487 server = (kvm_cfg & KVM_XIVE_SOURCE_SERVER_MASK) >>
488 KVM_XIVE_SOURCE_SERVER_SHIFT;
489 masked = (kvm_cfg & KVM_XIVE_SOURCE_MASKED_MASK) >>
490 KVM_XIVE_SOURCE_MASKED_SHIFT;
491 eisn = (kvm_cfg & KVM_XIVE_SOURCE_EISN_MASK) >>
492 KVM_XIVE_SOURCE_EISN_SHIFT;
494 if (priority != xive_prio_from_guest(priority)) {
495 pr_err("invalid priority for queue %d for VCPU %d\n",
500 return kvmppc_xive_native_update_source_config(xive, sb, state, server,
501 priority, masked, eisn);
504 static int kvmppc_xive_native_sync_source(struct kvmppc_xive *xive,
507 struct kvmppc_xive_src_block *sb;
508 struct kvmppc_xive_irq_state *state;
509 struct xive_irq_data *xd;
514 pr_devel("%s irq=0x%lx", __func__, irq);
516 sb = kvmppc_xive_find_source(xive, irq, &src);
520 state = &sb->irq_state[src];
524 arch_spin_lock(&sb->lock);
527 kvmppc_xive_select_irq(state, &hw_num, &xd);
528 xive_native_sync_source(hw_num);
532 arch_spin_unlock(&sb->lock);
536 static int xive_native_validate_queue_size(u32 qshift)
539 * We only support 64K pages for the moment. This is also
540 * advertised in the DT property "ibm,xive-eq-sizes"
543 case 0: /* EQ reset */
554 static int kvmppc_xive_native_set_queue_config(struct kvmppc_xive *xive,
555 long eq_idx, u64 addr)
557 struct kvm *kvm = xive->kvm;
558 struct kvm_vcpu *vcpu;
559 struct kvmppc_xive_vcpu *xc;
560 void __user *ubufp = (void __user *) addr;
563 struct kvm_ppc_xive_eq kvm_eq;
569 unsigned long page_size;
573 * Demangle priority/server tuple from the EQ identifier
575 priority = (eq_idx & KVM_XIVE_EQ_PRIORITY_MASK) >>
576 KVM_XIVE_EQ_PRIORITY_SHIFT;
577 server = (eq_idx & KVM_XIVE_EQ_SERVER_MASK) >>
578 KVM_XIVE_EQ_SERVER_SHIFT;
580 if (copy_from_user(&kvm_eq, ubufp, sizeof(kvm_eq)))
583 vcpu = kvmppc_xive_find_server(kvm, server);
585 pr_err("Can't find server %d\n", server);
588 xc = vcpu->arch.xive_vcpu;
590 if (priority != xive_prio_from_guest(priority)) {
591 pr_err("Trying to restore invalid queue %d for VCPU %d\n",
595 q = &xc->queues[priority];
597 pr_devel("%s VCPU %d priority %d fl:%x shift:%d addr:%llx g:%d idx:%d\n",
598 __func__, server, priority, kvm_eq.flags,
599 kvm_eq.qshift, kvm_eq.qaddr, kvm_eq.qtoggle, kvm_eq.qindex);
601 /* reset queue and disable queueing */
602 if (!kvm_eq.qshift) {
606 rc = kvmppc_xive_native_configure_queue(xc->vp_id, q, priority,
609 pr_err("Failed to reset queue %d for VCPU %d: %d\n",
610 priority, xc->server_num, rc);
618 * sPAPR specifies a "Unconditional Notify (n) flag" for the
619 * H_INT_SET_QUEUE_CONFIG hcall which forces notification
620 * without using the coalescing mechanisms provided by the
621 * XIVE END ESBs. This is required on KVM as notification
622 * using the END ESBs is not supported.
624 if (kvm_eq.flags != KVM_XIVE_EQ_ALWAYS_NOTIFY) {
625 pr_err("invalid flags %d\n", kvm_eq.flags);
629 rc = xive_native_validate_queue_size(kvm_eq.qshift);
631 pr_err("invalid queue size %d\n", kvm_eq.qshift);
635 if (kvm_eq.qaddr & ((1ull << kvm_eq.qshift) - 1)) {
636 pr_err("queue page is not aligned %llx/%llx\n", kvm_eq.qaddr,
637 1ull << kvm_eq.qshift);
641 srcu_idx = srcu_read_lock(&kvm->srcu);
642 gfn = gpa_to_gfn(kvm_eq.qaddr);
644 page_size = kvm_host_page_size(vcpu, gfn);
645 if (1ull << kvm_eq.qshift > page_size) {
646 srcu_read_unlock(&kvm->srcu, srcu_idx);
647 pr_warn("Incompatible host page size %lx!\n", page_size);
651 page = gfn_to_page(kvm, gfn);
652 if (is_error_page(page)) {
653 srcu_read_unlock(&kvm->srcu, srcu_idx);
654 pr_err("Couldn't get queue page %llx!\n", kvm_eq.qaddr);
658 qaddr = page_to_virt(page) + (kvm_eq.qaddr & ~PAGE_MASK);
659 srcu_read_unlock(&kvm->srcu, srcu_idx);
662 * Backup the queue page guest address to the mark EQ page
663 * dirty for migration.
665 q->guest_qaddr = kvm_eq.qaddr;
666 q->guest_qshift = kvm_eq.qshift;
669 * Unconditional Notification is forced by default at the
670 * OPAL level because the use of END ESBs is not supported by
673 rc = kvmppc_xive_native_configure_queue(xc->vp_id, q, priority,
674 (__be32 *) qaddr, kvm_eq.qshift, true);
676 pr_err("Failed to configure queue %d for VCPU %d: %d\n",
677 priority, xc->server_num, rc);
683 * Only restore the queue state when needed. When doing the
684 * H_INT_SET_SOURCE_CONFIG hcall, it should not.
686 if (kvm_eq.qtoggle != 1 || kvm_eq.qindex != 0) {
687 rc = xive_native_set_queue_state(xc->vp_id, priority,
694 rc = kvmppc_xive_attach_escalation(vcpu, priority,
695 xive->single_escalation);
698 kvmppc_xive_native_cleanup_queue(vcpu, priority);
702 static int kvmppc_xive_native_get_queue_config(struct kvmppc_xive *xive,
703 long eq_idx, u64 addr)
705 struct kvm *kvm = xive->kvm;
706 struct kvm_vcpu *vcpu;
707 struct kvmppc_xive_vcpu *xc;
709 void __user *ubufp = (u64 __user *) addr;
712 struct kvm_ppc_xive_eq kvm_eq;
721 * Demangle priority/server tuple from the EQ identifier
723 priority = (eq_idx & KVM_XIVE_EQ_PRIORITY_MASK) >>
724 KVM_XIVE_EQ_PRIORITY_SHIFT;
725 server = (eq_idx & KVM_XIVE_EQ_SERVER_MASK) >>
726 KVM_XIVE_EQ_SERVER_SHIFT;
728 vcpu = kvmppc_xive_find_server(kvm, server);
730 pr_err("Can't find server %d\n", server);
733 xc = vcpu->arch.xive_vcpu;
735 if (priority != xive_prio_from_guest(priority)) {
736 pr_err("invalid priority for queue %d for VCPU %d\n",
740 q = &xc->queues[priority];
742 memset(&kvm_eq, 0, sizeof(kvm_eq));
747 rc = xive_native_get_queue_info(xc->vp_id, priority, &qaddr, &qshift,
748 &qeoi_page, &escalate_irq, &qflags);
753 if (qflags & OPAL_XIVE_EQ_ALWAYS_NOTIFY)
754 kvm_eq.flags |= KVM_XIVE_EQ_ALWAYS_NOTIFY;
756 kvm_eq.qshift = q->guest_qshift;
757 kvm_eq.qaddr = q->guest_qaddr;
759 rc = xive_native_get_queue_state(xc->vp_id, priority, &kvm_eq.qtoggle,
764 pr_devel("%s VCPU %d priority %d fl:%x shift:%d addr:%llx g:%d idx:%d\n",
765 __func__, server, priority, kvm_eq.flags,
766 kvm_eq.qshift, kvm_eq.qaddr, kvm_eq.qtoggle, kvm_eq.qindex);
768 if (copy_to_user(ubufp, &kvm_eq, sizeof(kvm_eq)))
774 static void kvmppc_xive_reset_sources(struct kvmppc_xive_src_block *sb)
778 for (i = 0; i < KVMPPC_XICS_IRQ_PER_ICS; i++) {
779 struct kvmppc_xive_irq_state *state = &sb->irq_state[i];
784 if (state->act_priority == MASKED)
788 state->act_server = 0;
789 state->act_priority = MASKED;
790 xive_vm_esb_load(&state->ipi_data, XIVE_ESB_SET_PQ_01);
791 xive_native_configure_irq(state->ipi_number, 0, MASKED, 0);
792 if (state->pt_number) {
793 xive_vm_esb_load(state->pt_data, XIVE_ESB_SET_PQ_01);
794 xive_native_configure_irq(state->pt_number,
800 static int kvmppc_xive_reset(struct kvmppc_xive *xive)
802 struct kvm *kvm = xive->kvm;
803 struct kvm_vcpu *vcpu;
806 pr_devel("%s\n", __func__);
808 mutex_lock(&xive->lock);
810 kvm_for_each_vcpu(i, vcpu, kvm) {
811 struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
817 kvmppc_xive_disable_vcpu_interrupts(vcpu);
819 for (prio = 0; prio < KVMPPC_XIVE_Q_COUNT; prio++) {
821 /* Single escalation, no queue 7 */
822 if (prio == 7 && xive->single_escalation)
825 if (xc->esc_virq[prio]) {
826 free_irq(xc->esc_virq[prio], vcpu);
827 irq_dispose_mapping(xc->esc_virq[prio]);
828 kfree(xc->esc_virq_names[prio]);
829 xc->esc_virq[prio] = 0;
832 kvmppc_xive_native_cleanup_queue(vcpu, prio);
836 for (i = 0; i <= xive->max_sbid; i++) {
837 struct kvmppc_xive_src_block *sb = xive->src_blocks[i];
840 arch_spin_lock(&sb->lock);
841 kvmppc_xive_reset_sources(sb);
842 arch_spin_unlock(&sb->lock);
846 mutex_unlock(&xive->lock);
851 static void kvmppc_xive_native_sync_sources(struct kvmppc_xive_src_block *sb)
855 for (j = 0; j < KVMPPC_XICS_IRQ_PER_ICS; j++) {
856 struct kvmppc_xive_irq_state *state = &sb->irq_state[j];
857 struct xive_irq_data *xd;
864 * The struct kvmppc_xive_irq_state reflects the state
865 * of the EAS configuration and not the state of the
866 * source. The source is masked setting the PQ bits to
867 * '-Q', which is what is being done before calling
868 * the KVM_DEV_XIVE_EQ_SYNC control.
870 * If a source EAS is configured, OPAL syncs the XIVE
871 * IC of the source and the XIVE IC of the previous
874 * So it should be fine ignoring MASKED sources as
875 * they have been synced already.
877 if (state->act_priority == MASKED)
880 kvmppc_xive_select_irq(state, &hw_num, &xd);
881 xive_native_sync_source(hw_num);
882 xive_native_sync_queue(hw_num);
886 static int kvmppc_xive_native_vcpu_eq_sync(struct kvm_vcpu *vcpu)
888 struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
895 for (prio = 0; prio < KVMPPC_XIVE_Q_COUNT; prio++) {
896 struct xive_q *q = &xc->queues[prio];
901 /* Mark EQ page dirty for migration */
902 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
903 mark_page_dirty(vcpu->kvm, gpa_to_gfn(q->guest_qaddr));
904 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
909 static int kvmppc_xive_native_eq_sync(struct kvmppc_xive *xive)
911 struct kvm *kvm = xive->kvm;
912 struct kvm_vcpu *vcpu;
915 pr_devel("%s\n", __func__);
917 mutex_lock(&xive->lock);
918 for (i = 0; i <= xive->max_sbid; i++) {
919 struct kvmppc_xive_src_block *sb = xive->src_blocks[i];
922 arch_spin_lock(&sb->lock);
923 kvmppc_xive_native_sync_sources(sb);
924 arch_spin_unlock(&sb->lock);
928 kvm_for_each_vcpu(i, vcpu, kvm) {
929 kvmppc_xive_native_vcpu_eq_sync(vcpu);
931 mutex_unlock(&xive->lock);
936 static int kvmppc_xive_native_set_attr(struct kvm_device *dev,
937 struct kvm_device_attr *attr)
939 struct kvmppc_xive *xive = dev->private;
941 switch (attr->group) {
942 case KVM_DEV_XIVE_GRP_CTRL:
943 switch (attr->attr) {
944 case KVM_DEV_XIVE_RESET:
945 return kvmppc_xive_reset(xive);
946 case KVM_DEV_XIVE_EQ_SYNC:
947 return kvmppc_xive_native_eq_sync(xive);
948 case KVM_DEV_XIVE_NR_SERVERS:
949 return kvmppc_xive_set_nr_servers(xive, attr->addr);
952 case KVM_DEV_XIVE_GRP_SOURCE:
953 return kvmppc_xive_native_set_source(xive, attr->attr,
955 case KVM_DEV_XIVE_GRP_SOURCE_CONFIG:
956 return kvmppc_xive_native_set_source_config(xive, attr->attr,
958 case KVM_DEV_XIVE_GRP_EQ_CONFIG:
959 return kvmppc_xive_native_set_queue_config(xive, attr->attr,
961 case KVM_DEV_XIVE_GRP_SOURCE_SYNC:
962 return kvmppc_xive_native_sync_source(xive, attr->attr,
968 static int kvmppc_xive_native_get_attr(struct kvm_device *dev,
969 struct kvm_device_attr *attr)
971 struct kvmppc_xive *xive = dev->private;
973 switch (attr->group) {
974 case KVM_DEV_XIVE_GRP_EQ_CONFIG:
975 return kvmppc_xive_native_get_queue_config(xive, attr->attr,
981 static int kvmppc_xive_native_has_attr(struct kvm_device *dev,
982 struct kvm_device_attr *attr)
984 switch (attr->group) {
985 case KVM_DEV_XIVE_GRP_CTRL:
986 switch (attr->attr) {
987 case KVM_DEV_XIVE_RESET:
988 case KVM_DEV_XIVE_EQ_SYNC:
989 case KVM_DEV_XIVE_NR_SERVERS:
993 case KVM_DEV_XIVE_GRP_SOURCE:
994 case KVM_DEV_XIVE_GRP_SOURCE_CONFIG:
995 case KVM_DEV_XIVE_GRP_SOURCE_SYNC:
996 if (attr->attr >= KVMPPC_XIVE_FIRST_IRQ &&
997 attr->attr < KVMPPC_XIVE_NR_IRQS)
1000 case KVM_DEV_XIVE_GRP_EQ_CONFIG:
1007 * Called when device fd is closed. kvm->lock is held.
1009 static void kvmppc_xive_native_release(struct kvm_device *dev)
1011 struct kvmppc_xive *xive = dev->private;
1012 struct kvm *kvm = xive->kvm;
1013 struct kvm_vcpu *vcpu;
1016 pr_devel("Releasing xive native device\n");
1019 * Clear the KVM device file address_space which is used to
1020 * unmap the ESB pages when a device is passed-through.
1022 mutex_lock(&xive->mapping_lock);
1023 xive->mapping = NULL;
1024 mutex_unlock(&xive->mapping_lock);
1027 * Since this is the device release function, we know that
1028 * userspace does not have any open fd or mmap referring to
1029 * the device. Therefore there can not be any of the
1030 * device attribute set/get, mmap, or page fault functions
1031 * being executed concurrently, and similarly, the
1032 * connect_vcpu and set/clr_mapped functions also cannot
1033 * be being executed.
1036 debugfs_remove(xive->dentry);
1039 * We should clean up the vCPU interrupt presenters first.
1041 kvm_for_each_vcpu(i, vcpu, kvm) {
1043 * Take vcpu->mutex to ensure that no one_reg get/set ioctl
1044 * (i.e. kvmppc_xive_native_[gs]et_vp) can be being done.
1045 * Holding the vcpu->mutex also means that the vcpu cannot
1046 * be executing the KVM_RUN ioctl, and therefore it cannot
1047 * be executing the XIVE push or pull code or accessing
1048 * the XIVE MMIO regions.
1050 mutex_lock(&vcpu->mutex);
1051 kvmppc_xive_native_cleanup_vcpu(vcpu);
1052 mutex_unlock(&vcpu->mutex);
1056 * Now that we have cleared vcpu->arch.xive_vcpu, vcpu->arch.irq_type
1057 * and vcpu->arch.xive_esc_[vr]addr on each vcpu, we are safe
1058 * against xive code getting called during vcpu execution or
1059 * set/get one_reg operations.
1061 kvm->arch.xive = NULL;
1063 for (i = 0; i <= xive->max_sbid; i++) {
1064 if (xive->src_blocks[i])
1065 kvmppc_xive_free_sources(xive->src_blocks[i]);
1066 kfree(xive->src_blocks[i]);
1067 xive->src_blocks[i] = NULL;
1070 if (xive->vp_base != XIVE_INVALID_VP)
1071 xive_native_free_vp_block(xive->vp_base);
1074 * A reference of the kvmppc_xive pointer is now kept under
1075 * the xive_devices struct of the machine for reuse. It is
1076 * freed when the VM is destroyed for now until we fix all the
1084 * Create a XIVE device. kvm->lock is held.
1086 static int kvmppc_xive_native_create(struct kvm_device *dev, u32 type)
1088 struct kvmppc_xive *xive;
1089 struct kvm *kvm = dev->kvm;
1091 pr_devel("Creating xive native device\n");
1096 xive = kvmppc_xive_get_device(kvm, type);
1100 dev->private = xive;
1103 mutex_init(&xive->mapping_lock);
1104 mutex_init(&xive->lock);
1106 /* VP allocation is delayed to the first call to connect_vcpu */
1107 xive->vp_base = XIVE_INVALID_VP;
1108 /* KVM_MAX_VCPUS limits the number of VMs to roughly 64 per sockets
1109 * on a POWER9 system.
1111 xive->nr_servers = KVM_MAX_VCPUS;
1113 xive->single_escalation = xive_native_has_single_escalation();
1114 xive->ops = &kvmppc_xive_native_ops;
1116 kvm->arch.xive = xive;
1121 * Interrupt Pending Buffer (IPB) offset
1123 #define TM_IPB_SHIFT 40
1124 #define TM_IPB_MASK (((u64) 0xFF) << TM_IPB_SHIFT)
1126 int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu, union kvmppc_one_reg *val)
1128 struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
1132 if (!kvmppc_xive_enabled(vcpu))
1138 /* Thread context registers. We only care about IPB and CPPR */
1139 val->xive_timaval[0] = vcpu->arch.xive_saved_state.w01;
1141 /* Get the VP state from OPAL */
1142 rc = xive_native_get_vp_state(xc->vp_id, &opal_state);
1147 * Capture the backup of IPB register in the NVT structure and
1148 * merge it in our KVM VP state.
1150 val->xive_timaval[0] |= cpu_to_be64(opal_state & TM_IPB_MASK);
1152 pr_devel("%s NSR=%02x CPPR=%02x IBP=%02x PIPR=%02x w01=%016llx w2=%08x opal=%016llx\n",
1154 vcpu->arch.xive_saved_state.nsr,
1155 vcpu->arch.xive_saved_state.cppr,
1156 vcpu->arch.xive_saved_state.ipb,
1157 vcpu->arch.xive_saved_state.pipr,
1158 vcpu->arch.xive_saved_state.w01,
1159 (u32) vcpu->arch.xive_cam_word, opal_state);
1164 int kvmppc_xive_native_set_vp(struct kvm_vcpu *vcpu, union kvmppc_one_reg *val)
1166 struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
1167 struct kvmppc_xive *xive = vcpu->kvm->arch.xive;
1169 pr_devel("%s w01=%016llx vp=%016llx\n", __func__,
1170 val->xive_timaval[0], val->xive_timaval[1]);
1172 if (!kvmppc_xive_enabled(vcpu))
1178 /* We can't update the state of a "pushed" VCPU */
1179 if (WARN_ON(vcpu->arch.xive_pushed))
1183 * Restore the thread context registers. IPB and CPPR should
1184 * be the only ones that matter.
1186 vcpu->arch.xive_saved_state.w01 = val->xive_timaval[0];
1189 * There is no need to restore the XIVE internal state (IPB
1190 * stored in the NVT) as the IPB register was merged in KVM VP
1191 * state when captured.
1196 bool kvmppc_xive_native_supported(void)
1198 return xive_native_has_queue_state_support();
1201 static int xive_native_debug_show(struct seq_file *m, void *private)
1203 struct kvmppc_xive *xive = m->private;
1204 struct kvm *kvm = xive->kvm;
1205 struct kvm_vcpu *vcpu;
1211 seq_puts(m, "=========\nVCPU state\n=========\n");
1213 kvm_for_each_vcpu(i, vcpu, kvm) {
1214 struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
1219 seq_printf(m, "VCPU %d: VP=%#x/%02x\n"
1220 " NSR=%02x CPPR=%02x IBP=%02x PIPR=%02x w01=%016llx w2=%08x\n",
1221 xc->server_num, xc->vp_id, xc->vp_chip_id,
1222 vcpu->arch.xive_saved_state.nsr,
1223 vcpu->arch.xive_saved_state.cppr,
1224 vcpu->arch.xive_saved_state.ipb,
1225 vcpu->arch.xive_saved_state.pipr,
1226 be64_to_cpu(vcpu->arch.xive_saved_state.w01),
1227 be32_to_cpu(vcpu->arch.xive_cam_word));
1229 kvmppc_xive_debug_show_queues(m, vcpu);
1232 seq_puts(m, "=========\nSources\n=========\n");
1234 for (i = 0; i <= xive->max_sbid; i++) {
1235 struct kvmppc_xive_src_block *sb = xive->src_blocks[i];
1238 arch_spin_lock(&sb->lock);
1239 kvmppc_xive_debug_show_sources(m, sb);
1240 arch_spin_unlock(&sb->lock);
1247 DEFINE_SHOW_ATTRIBUTE(xive_native_debug);
1249 static void xive_native_debugfs_init(struct kvmppc_xive *xive)
1253 name = kasprintf(GFP_KERNEL, "kvm-xive-%p", xive);
1255 pr_err("%s: no memory for name\n", __func__);
1259 xive->dentry = debugfs_create_file(name, 0444, powerpc_debugfs_root,
1260 xive, &xive_native_debug_fops);
1262 pr_debug("%s: created %s\n", __func__, name);
1266 static void kvmppc_xive_native_init(struct kvm_device *dev)
1268 struct kvmppc_xive *xive = (struct kvmppc_xive *)dev->private;
1270 /* Register some debug interfaces */
1271 xive_native_debugfs_init(xive);
1274 struct kvm_device_ops kvm_xive_native_ops = {
1275 .name = "kvm-xive-native",
1276 .create = kvmppc_xive_native_create,
1277 .init = kvmppc_xive_native_init,
1278 .release = kvmppc_xive_native_release,
1279 .set_attr = kvmppc_xive_native_set_attr,
1280 .get_attr = kvmppc_xive_native_get_attr,
1281 .has_attr = kvmppc_xive_native_has_attr,
1282 .mmap = kvmppc_xive_native_mmap,