summary refs log tree commit diff
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-pink 1.4.1 (git 2.36.1) at 2024-09-25 17:31:39 +0000