summaryrefslogtreecommitdiff
path: root/virt/kvm/arm/vgic/vgic-debug.c
diff options
context:
space:
mode:
Diffstat (limited to 'virt/kvm/arm/vgic/vgic-debug.c')
-rw-r--r--virt/kvm/arm/vgic/vgic-debug.c300
1 files changed, 0 insertions, 300 deletions
diff --git a/virt/kvm/arm/vgic/vgic-debug.c b/virt/kvm/arm/vgic/vgic-debug.c
deleted file mode 100644
index b13a9e3f99dd..000000000000
--- a/virt/kvm/arm/vgic/vgic-debug.c
+++ /dev/null
@@ -1,300 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2016 Linaro
- * Author: Christoffer Dall <christoffer.dall@linaro.org>
- */
-
-#include <linux/cpu.h>
-#include <linux/debugfs.h>
-#include <linux/interrupt.h>
-#include <linux/kvm_host.h>
-#include <linux/seq_file.h>
-#include <kvm/arm_vgic.h>
-#include <asm/kvm_mmu.h>
-#include "vgic.h"
-
-/*
- * Structure to control looping through the entire vgic state. We start at
- * zero for each field and move upwards. So, if dist_id is 0 we print the
- * distributor info. When dist_id is 1, we have already printed it and move
- * on.
- *
- * When vcpu_id < nr_cpus we print the vcpu info until vcpu_id == nr_cpus and
- * so on.
- */
-struct vgic_state_iter {
- int nr_cpus;
- int nr_spis;
- int nr_lpis;
- int dist_id;
- int vcpu_id;
- int intid;
- int lpi_idx;
- u32 *lpi_array;
-};
-
-static void iter_next(struct vgic_state_iter *iter)
-{
- if (iter->dist_id == 0) {
- iter->dist_id++;
- return;
- }
-
- iter->intid++;
- if (iter->intid == VGIC_NR_PRIVATE_IRQS &&
- ++iter->vcpu_id < iter->nr_cpus)
- iter->intid = 0;
-
- if (iter->intid >= (iter->nr_spis + VGIC_NR_PRIVATE_IRQS)) {
- if (iter->lpi_idx < iter->nr_lpis)
- iter->intid = iter->lpi_array[iter->lpi_idx];
- iter->lpi_idx++;
- }
-}
-
-static void iter_init(struct kvm *kvm, struct vgic_state_iter *iter,
- loff_t pos)
-{
- int nr_cpus = atomic_read(&kvm->online_vcpus);
-
- memset(iter, 0, sizeof(*iter));
-
- iter->nr_cpus = nr_cpus;
- iter->nr_spis = kvm->arch.vgic.nr_spis;
- if (kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) {
- iter->nr_lpis = vgic_copy_lpi_list(kvm, NULL, &iter->lpi_array);
- if (iter->nr_lpis < 0)
- iter->nr_lpis = 0;
- }
-
- /* Fast forward to the right position if needed */
- while (pos--)
- iter_next(iter);
-}
-
-static bool end_of_vgic(struct vgic_state_iter *iter)
-{
- return iter->dist_id > 0 &&
- iter->vcpu_id == iter->nr_cpus &&
- iter->intid >= (iter->nr_spis + VGIC_NR_PRIVATE_IRQS) &&
- iter->lpi_idx > iter->nr_lpis;
-}
-
-static void *vgic_debug_start(struct seq_file *s, loff_t *pos)
-{
- struct kvm *kvm = (struct kvm *)s->private;
- struct vgic_state_iter *iter;
-
- mutex_lock(&kvm->lock);
- iter = kvm->arch.vgic.iter;
- if (iter) {
- iter = ERR_PTR(-EBUSY);
- goto out;
- }
-
- iter = kmalloc(sizeof(*iter), GFP_KERNEL);
- if (!iter) {
- iter = ERR_PTR(-ENOMEM);
- goto out;
- }
-
- iter_init(kvm, iter, *pos);
- kvm->arch.vgic.iter = iter;
-
- if (end_of_vgic(iter))
- iter = NULL;
-out:
- mutex_unlock(&kvm->lock);
- return iter;
-}
-
-static void *vgic_debug_next(struct seq_file *s, void *v, loff_t *pos)
-{
- struct kvm *kvm = (struct kvm *)s->private;
- struct vgic_state_iter *iter = kvm->arch.vgic.iter;
-
- ++*pos;
- iter_next(iter);
- if (end_of_vgic(iter))
- iter = NULL;
- return iter;
-}
-
-static void vgic_debug_stop(struct seq_file *s, void *v)
-{
- struct kvm *kvm = (struct kvm *)s->private;
- struct vgic_state_iter *iter;
-
- /*
- * If the seq file wasn't properly opened, there's nothing to clearn
- * up.
- */
- if (IS_ERR(v))
- return;
-
- mutex_lock(&kvm->lock);
- iter = kvm->arch.vgic.iter;
- kfree(iter->lpi_array);
- kfree(iter);
- kvm->arch.vgic.iter = NULL;
- mutex_unlock(&kvm->lock);
-}
-
-static void print_dist_state(struct seq_file *s, struct vgic_dist *dist)
-{
- bool v3 = dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3;
-
- seq_printf(s, "Distributor\n");
- seq_printf(s, "===========\n");
- seq_printf(s, "vgic_model:\t%s\n", v3 ? "GICv3" : "GICv2");
- seq_printf(s, "nr_spis:\t%d\n", dist->nr_spis);
- if (v3)
- seq_printf(s, "nr_lpis:\t%d\n", dist->lpi_list_count);
- seq_printf(s, "enabled:\t%d\n", dist->enabled);
- seq_printf(s, "\n");
-
- seq_printf(s, "P=pending_latch, L=line_level, A=active\n");
- seq_printf(s, "E=enabled, H=hw, C=config (level=1, edge=0)\n");
- seq_printf(s, "G=group\n");
-}
-
-static void print_header(struct seq_file *s, struct vgic_irq *irq,
- struct kvm_vcpu *vcpu)
-{
- int id = 0;
- char *hdr = "SPI ";
-
- if (vcpu) {
- hdr = "VCPU";
- id = vcpu->vcpu_id;
- }
-
- seq_printf(s, "\n");
- seq_printf(s, "%s%2d TYP ID TGT_ID PLAEHCG HWID TARGET SRC PRI VCPU_ID\n", hdr, id);
- seq_printf(s, "----------------------------------------------------------------\n");
-}
-
-static void print_irq_state(struct seq_file *s, struct vgic_irq *irq,
- struct kvm_vcpu *vcpu)
-{
- char *type;
- bool pending;
-
- if (irq->intid < VGIC_NR_SGIS)
- type = "SGI";
- else if (irq->intid < VGIC_NR_PRIVATE_IRQS)
- type = "PPI";
- else if (irq->intid < VGIC_MAX_SPI)
- type = "SPI";
- else
- type = "LPI";
-
- if (irq->intid ==0 || irq->intid == VGIC_NR_PRIVATE_IRQS)
- print_header(s, irq, vcpu);
-
- pending = irq->pending_latch;
- if (irq->hw && vgic_irq_is_sgi(irq->intid)) {
- int err;
-
- err = irq_get_irqchip_state(irq->host_irq,
- IRQCHIP_STATE_PENDING,
- &pending);
- WARN_ON_ONCE(err);
- }
-
- seq_printf(s, " %s %4d "
- " %2d "
- "%d%d%d%d%d%d%d "
- "%8d "
- "%8x "
- " %2x "
- "%3d "
- " %2d "
- "\n",
- type, irq->intid,
- (irq->target_vcpu) ? irq->target_vcpu->vcpu_id : -1,
- pending,
- irq->line_level,
- irq->active,
- irq->enabled,
- irq->hw,
- irq->config == VGIC_CONFIG_LEVEL,
- irq->group,
- irq->hwintid,
- irq->mpidr,
- irq->source,
- irq->priority,
- (irq->vcpu) ? irq->vcpu->vcpu_id : -1);
-}
-
-static int vgic_debug_show(struct seq_file *s, void *v)
-{
- struct kvm *kvm = (struct kvm *)s->private;
- struct vgic_state_iter *iter = (struct vgic_state_iter *)v;
- struct vgic_irq *irq;
- struct kvm_vcpu *vcpu = NULL;
- unsigned long flags;
-
- if (iter->dist_id == 0) {
- print_dist_state(s, &kvm->arch.vgic);
- return 0;
- }
-
- if (!kvm->arch.vgic.initialized)
- return 0;
-
- if (iter->vcpu_id < iter->nr_cpus)
- vcpu = kvm_get_vcpu(kvm, iter->vcpu_id);
-
- irq = vgic_get_irq(kvm, vcpu, iter->intid);
- if (!irq) {
- seq_printf(s, " LPI %4d freed\n", iter->intid);
- return 0;
- }
-
- raw_spin_lock_irqsave(&irq->irq_lock, flags);
- print_irq_state(s, irq, vcpu);
- raw_spin_unlock_irqrestore(&irq->irq_lock, flags);
-
- vgic_put_irq(kvm, irq);
- return 0;
-}
-
-static const struct seq_operations vgic_debug_seq_ops = {
- .start = vgic_debug_start,
- .next = vgic_debug_next,
- .stop = vgic_debug_stop,
- .show = vgic_debug_show
-};
-
-static int debug_open(struct inode *inode, struct file *file)
-{
- int ret;
- ret = seq_open(file, &vgic_debug_seq_ops);
- if (!ret) {
- struct seq_file *seq;
- /* seq_open will have modified file->private_data */
- seq = file->private_data;
- seq->private = inode->i_private;
- }
-
- return ret;
-};
-
-static const struct file_operations vgic_debug_fops = {
- .owner = THIS_MODULE,
- .open = debug_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release
-};
-
-void vgic_debug_init(struct kvm *kvm)
-{
- debugfs_create_file("vgic-state", 0444, kvm->debugfs_dentry, kvm,
- &vgic_debug_fops);
-}
-
-void vgic_debug_destroy(struct kvm *kvm)
-{
-}
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-26 17:18:19 +0000