99cdc6c18c
This patch adds initial skeletal KVM RISC-V support which has: 1. A simple implementation of arch specific VM functions except kvm_vm_ioctl_get_dirty_log() which will implemeted in-future as part of stage2 page loging. 2. Stubs of required arch specific VCPU functions except kvm_arch_vcpu_ioctl_run() which is semi-complete and extended by subsequent patches. 3. Stubs for required arch specific stage2 MMU functions. Signed-off-by: Anup Patel <anup.patel@wdc.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Alexander Graf <graf@amazon.com> Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/uaccess.h>
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#include <linux/kvm_host.h>
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const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
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KVM_GENERIC_VM_STATS()
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};
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static_assert(ARRAY_SIZE(kvm_vm_stats_desc) ==
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sizeof(struct kvm_vm_stat) / sizeof(u64));
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const struct kvm_stats_header kvm_vm_stats_header = {
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.name_size = KVM_STATS_NAME_SIZE,
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.num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
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.id_offset = sizeof(struct kvm_stats_header),
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.desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
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.data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
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sizeof(kvm_vm_stats_desc),
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};
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int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
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{
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/* TODO: To be added later. */
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return -EOPNOTSUPP;
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}
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int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
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{
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int r;
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r = kvm_riscv_stage2_alloc_pgd(kvm);
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if (r)
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return r;
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return 0;
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}
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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
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int i;
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for (i = 0; i < KVM_MAX_VCPUS; ++i) {
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if (kvm->vcpus[i]) {
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kvm_vcpu_destroy(kvm->vcpus[i]);
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kvm->vcpus[i] = NULL;
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}
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}
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atomic_set(&kvm->online_vcpus, 0);
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}
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int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
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{
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int r;
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switch (ext) {
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case KVM_CAP_DEVICE_CTRL:
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case KVM_CAP_USER_MEMORY:
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case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
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case KVM_CAP_ONE_REG:
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case KVM_CAP_READONLY_MEM:
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case KVM_CAP_MP_STATE:
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case KVM_CAP_IMMEDIATE_EXIT:
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r = 1;
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break;
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case KVM_CAP_NR_VCPUS:
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r = num_online_cpus();
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break;
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case KVM_CAP_MAX_VCPUS:
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r = KVM_MAX_VCPUS;
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break;
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case KVM_CAP_NR_MEMSLOTS:
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r = KVM_USER_MEM_SLOTS;
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break;
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default:
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r = 0;
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break;
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}
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return r;
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}
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long kvm_arch_vm_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg)
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{
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return -EINVAL;
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}
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