diff options
Diffstat (limited to 'arch/loongarch/kvm/vm.c')
| -rw-r--r-- | arch/loongarch/kvm/vm.c | 107 |
1 files changed, 105 insertions, 2 deletions
diff --git a/arch/loongarch/kvm/vm.c b/arch/loongarch/kvm/vm.c index 0a37f6fa8f2d..edccfc8c9cd8 100644 --- a/arch/loongarch/kvm/vm.c +++ b/arch/loongarch/kvm/vm.c @@ -5,6 +5,9 @@ #include <linux/kvm_host.h> #include <asm/kvm_mmu.h> +#include <asm/kvm_vcpu.h> +#include <asm/kvm_eiointc.h> +#include <asm/kvm_pch_pic.h> const struct _kvm_stats_desc kvm_vm_stats_desc[] = { KVM_GENERIC_VM_STATS(), @@ -30,8 +33,26 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) if (!kvm->arch.pgd) return -ENOMEM; + kvm->arch.phyid_map = kvzalloc(sizeof(struct kvm_phyid_map), GFP_KERNEL_ACCOUNT); + if (!kvm->arch.phyid_map) { + free_page((unsigned long)kvm->arch.pgd); + kvm->arch.pgd = NULL; + return -ENOMEM; + } + spin_lock_init(&kvm->arch.phyid_map_lock); + kvm_init_vmcs(kvm); - kvm->arch.gpa_size = BIT(cpu_vabits - 1); + + /* Enable all PV features by default */ + kvm->arch.pv_features = BIT(KVM_FEATURE_IPI); + if (kvm_pvtime_supported()) + kvm->arch.pv_features |= BIT(KVM_FEATURE_STEAL_TIME); + + /* + * cpu_vabits means user address space only (a half of total). + * GPA size of VM is the same with the size of user address space. + */ + kvm->arch.gpa_size = BIT(cpu_vabits); kvm->arch.root_level = CONFIG_PGTABLE_LEVELS - 1; kvm->arch.invalid_ptes[0] = 0; kvm->arch.invalid_ptes[1] = (unsigned long)invalid_pte_table; @@ -52,6 +73,8 @@ void kvm_arch_destroy_vm(struct kvm *kvm) kvm_destroy_vcpus(kvm); free_page((unsigned long)kvm->arch.pgd); kvm->arch.pgd = NULL; + kvfree(kvm->arch.phyid_map); + kvm->arch.phyid_map = NULL; } int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) @@ -59,6 +82,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) int r; switch (ext) { + case KVM_CAP_IRQCHIP: case KVM_CAP_ONE_REG: case KVM_CAP_ENABLE_CAP: case KVM_CAP_READONLY_MEM: @@ -66,6 +90,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_IMMEDIATE_EXIT: case KVM_CAP_IOEVENTFD: case KVM_CAP_MP_STATE: + case KVM_CAP_SET_GUEST_DEBUG: r = 1; break; case KVM_CAP_NR_VCPUS: @@ -88,7 +113,85 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) return r; } +static int kvm_vm_feature_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) +{ + switch (attr->attr) { + case KVM_LOONGARCH_VM_FEAT_LSX: + if (cpu_has_lsx) + return 0; + return -ENXIO; + case KVM_LOONGARCH_VM_FEAT_LASX: + if (cpu_has_lasx) + return 0; + return -ENXIO; + case KVM_LOONGARCH_VM_FEAT_X86BT: + if (cpu_has_lbt_x86) + return 0; + return -ENXIO; + case KVM_LOONGARCH_VM_FEAT_ARMBT: + if (cpu_has_lbt_arm) + return 0; + return -ENXIO; + case KVM_LOONGARCH_VM_FEAT_MIPSBT: + if (cpu_has_lbt_mips) + return 0; + return -ENXIO; + case KVM_LOONGARCH_VM_FEAT_PMU: + if (cpu_has_pmp) + return 0; + return -ENXIO; + case KVM_LOONGARCH_VM_FEAT_PV_IPI: + return 0; + case KVM_LOONGARCH_VM_FEAT_PV_STEALTIME: + if (kvm_pvtime_supported()) + return 0; + return -ENXIO; + default: + return -ENXIO; + } +} + +static int kvm_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) +{ + switch (attr->group) { + case KVM_LOONGARCH_VM_FEAT_CTRL: + return kvm_vm_feature_has_attr(kvm, attr); + default: + return -ENXIO; + } +} + int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { - return -ENOIOCTLCMD; + void __user *argp = (void __user *)arg; + struct kvm *kvm = filp->private_data; + struct kvm_device_attr attr; + + switch (ioctl) { + case KVM_CREATE_IRQCHIP: + return 0; + case KVM_HAS_DEVICE_ATTR: + if (copy_from_user(&attr, argp, sizeof(attr))) + return -EFAULT; + + return kvm_vm_has_attr(kvm, &attr); + default: + return -ENOIOCTLCMD; + } +} + +int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, bool line_status) +{ + if (!kvm_arch_irqchip_in_kernel(kvm)) + return -ENXIO; + + irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, + irq_event->irq, irq_event->level, line_status); + + return 0; +} + +bool kvm_arch_irqchip_in_kernel(struct kvm *kvm) +{ + return (kvm->arch.ipi && kvm->arch.eiointc && kvm->arch.pch_pic); } |