Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | // SPDX-License-Identifier: GPL-2.0-only /* * Kernel-based Virtual Machine driver for Linux * * Copyright 2016 Red Hat, Inc. and/or its affiliates. */ #include <linux/kvm_host.h> #include <linux/debugfs.h> #include "lapic.h" #include "mmu.h" #include "mmu/mmu_internal.h" static int vcpu_get_timer_advance_ns(void *data, u64 *val) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; *val = vcpu->arch.apic->lapic_timer.timer_advance_ns; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n"); static int vcpu_get_guest_mode(void *data, u64 *val) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; *val = vcpu->stat.guest_mode; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_guest_mode_fops, vcpu_get_guest_mode, NULL, "%lld\n"); static int vcpu_get_tsc_offset(void *data, u64 *val) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; *val = vcpu->arch.tsc_offset; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n"); static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; *val = vcpu->arch.tsc_scaling_ratio; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n"); static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val) { *val = kvm_tsc_scaling_ratio_frac_bits; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n"); void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry) { debugfs_create_file("guest_mode", 0444, debugfs_dentry, vcpu, &vcpu_guest_mode_fops); debugfs_create_file("tsc-offset", 0444, debugfs_dentry, vcpu, &vcpu_tsc_offset_fops); if (lapic_in_kernel(vcpu)) debugfs_create_file("lapic_timer_advance_ns", 0444, debugfs_dentry, vcpu, &vcpu_timer_advance_ns_fops); if (kvm_has_tsc_control) { debugfs_create_file("tsc-scaling-ratio", 0444, debugfs_dentry, vcpu, &vcpu_tsc_scaling_fops); debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444, debugfs_dentry, vcpu, &vcpu_tsc_scaling_frac_fops); } } /* * This covers statistics <1024 (11=log(1024)+1), which should be enough to * cover RMAP_RECYCLE_THRESHOLD. */ #define RMAP_LOG_SIZE 11 static const char *kvm_lpage_str[KVM_NR_PAGE_SIZES] = { "4K", "2M", "1G" }; static int kvm_mmu_rmaps_stat_show(struct seq_file *m, void *v) { struct kvm_rmap_head *rmap; struct kvm *kvm = m->private; struct kvm_memory_slot *slot; struct kvm_memslots *slots; unsigned int lpage_size, index; /* Still small enough to be on the stack */ unsigned int *log[KVM_NR_PAGE_SIZES], *cur; int i, j, k, l, ret; if (!kvm_memslots_have_rmaps(kvm)) return 0; ret = -ENOMEM; memset(log, 0, sizeof(log)); for (i = 0; i < KVM_NR_PAGE_SIZES; i++) { log[i] = kcalloc(RMAP_LOG_SIZE, sizeof(unsigned int), GFP_KERNEL); if (!log[i]) goto out; } mutex_lock(&kvm->slots_lock); write_lock(&kvm->mmu_lock); for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { slots = __kvm_memslots(kvm, i); for (j = 0; j < slots->used_slots; j++) { slot = &slots->memslots[j]; for (k = 0; k < KVM_NR_PAGE_SIZES; k++) { rmap = slot->arch.rmap[k]; lpage_size = kvm_mmu_slot_lpages(slot, k + 1); cur = log[k]; for (l = 0; l < lpage_size; l++) { index = ffs(pte_list_count(&rmap[l])); if (WARN_ON_ONCE(index >= RMAP_LOG_SIZE)) index = RMAP_LOG_SIZE - 1; cur[index]++; } } } } write_unlock(&kvm->mmu_lock); mutex_unlock(&kvm->slots_lock); /* index=0 counts no rmap; index=1 counts 1 rmap */ seq_printf(m, "Rmap_Count:\t0\t1\t"); for (i = 2; i < RMAP_LOG_SIZE; i++) { j = 1 << (i - 1); k = (1 << i) - 1; seq_printf(m, "%d-%d\t", j, k); } seq_printf(m, "\n"); for (i = 0; i < KVM_NR_PAGE_SIZES; i++) { seq_printf(m, "Level=%s:\t", kvm_lpage_str[i]); cur = log[i]; for (j = 0; j < RMAP_LOG_SIZE; j++) seq_printf(m, "%d\t", cur[j]); seq_printf(m, "\n"); } ret = 0; out: for (i = 0; i < KVM_NR_PAGE_SIZES; i++) kfree(log[i]); return ret; } static int kvm_mmu_rmaps_stat_open(struct inode *inode, struct file *file) { struct kvm *kvm = inode->i_private; if (!kvm_get_kvm_safe(kvm)) return -ENOENT; return single_open(file, kvm_mmu_rmaps_stat_show, kvm); } static int kvm_mmu_rmaps_stat_release(struct inode *inode, struct file *file) { struct kvm *kvm = inode->i_private; kvm_put_kvm(kvm); return single_release(inode, file); } static const struct file_operations mmu_rmaps_stat_fops = { .open = kvm_mmu_rmaps_stat_open, .read = seq_read, .llseek = seq_lseek, .release = kvm_mmu_rmaps_stat_release, }; int kvm_arch_create_vm_debugfs(struct kvm *kvm) { debugfs_create_file("mmu_rmaps_stat", 0644, kvm->debugfs_dentry, kvm, &mmu_rmaps_stat_fops); return 0; } |