diff options
| -rw-r--r-- | arch/arm/include/asm/kvm_host.h | 4 | ||||
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 4 | ||||
| -rw-r--r-- | include/uapi/linux/kvm.h | 3 | ||||
| -rw-r--r-- | virt/kvm/arm/arm.c | 18 |
4 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index a49ee01242ff..e80cfc18412b 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -19,6 +19,7 @@ #ifndef __ARM_KVM_HOST_H__ #define __ARM_KVM_HOST_H__ +#include <linux/errno.h> #include <linux/types.h> #include <linux/kvm_types.h> #include <asm/cputype.h> @@ -411,4 +412,7 @@ static inline int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type) return 0; } +#define kvm_arm_vcpu_finalize(vcpu, what) (-EINVAL) +#define kvm_arm_vcpu_is_finalized(vcpu) true + #endif /* __ARM_KVM_HOST_H__ */ diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 3e8950942591..98658f7dad68 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -23,6 +23,7 @@ #define __ARM64_KVM_HOST_H__ #include <linux/bitmap.h> +#include <linux/errno.h> #include <linux/types.h> #include <linux/jump_label.h> #include <linux/kvm_types.h> @@ -625,4 +626,7 @@ void kvm_arch_free_vm(struct kvm *kvm); int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type); +#define kvm_arm_vcpu_finalize(vcpu, what) (-EINVAL) +#define kvm_arm_vcpu_is_finalized(vcpu) true + #endif /* __ARM64_KVM_HOST_H__ */ diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index dc77a5a3648d..c3b8e7a31315 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1441,6 +1441,9 @@ struct kvm_enc_region { /* Available with KVM_CAP_HYPERV_CPUID */ #define KVM_GET_SUPPORTED_HV_CPUID _IOWR(KVMIO, 0xc1, struct kvm_cpuid2) +/* Available with KVM_CAP_ARM_SVE */ +#define KVM_ARM_VCPU_FINALIZE _IOW(KVMIO, 0xc2, int) + /* Secure Encrypted Virtualization command */ enum sev_cmd_id { /* Guest initialization commands */ diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index c69e1370a5dc..9edbf0f676e7 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -545,6 +545,9 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) if (likely(vcpu->arch.has_run_once)) return 0; + if (!kvm_arm_vcpu_is_finalized(vcpu)) + return -EPERM; + vcpu->arch.has_run_once = true; if (likely(irqchip_in_kernel(kvm))) { @@ -1116,6 +1119,10 @@ long kvm_arch_vcpu_ioctl(struct file *filp, if (unlikely(!kvm_vcpu_initialized(vcpu))) break; + r = -EPERM; + if (!kvm_arm_vcpu_is_finalized(vcpu)) + break; + r = -EFAULT; if (copy_from_user(®_list, user_list, sizeof(reg_list))) break; @@ -1169,6 +1176,17 @@ long kvm_arch_vcpu_ioctl(struct file *filp, return kvm_arm_vcpu_set_events(vcpu, &events); } + case KVM_ARM_VCPU_FINALIZE: { + int what; + + if (!kvm_vcpu_initialized(vcpu)) + return -ENOEXEC; + + if (get_user(what, (const int __user *)argp)) + return -EFAULT; + + return kvm_arm_vcpu_finalize(vcpu, what); + } default: r = -EINVAL; } |