| Message ID | 148846783136.2349.9362218518503742320.stgit@brijesh-build-machine (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Herbert Xu |
| Headers | show |
On 02/03/2017 16:17, Brijesh Singh wrote: > If hardware supports encrypting then KVM_MEMORY_ENCRYPT_OP ioctl can > be used by qemu to issue platform specific memory encryption commands. > > Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> > --- > arch/x86/include/asm/kvm_host.h | 2 ++ > arch/x86/kvm/x86.c | 12 ++++++++++++ > include/uapi/linux/kvm.h | 2 ++ > 3 files changed, 16 insertions(+) > > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h > index bff1f15..62651ad 100644 > --- a/arch/x86/include/asm/kvm_host.h > +++ b/arch/x86/include/asm/kvm_host.h > @@ -1033,6 +1033,8 @@ struct kvm_x86_ops { > void (*cancel_hv_timer)(struct kvm_vcpu *vcpu); > > void (*setup_mce)(struct kvm_vcpu *vcpu); > + > + int (*memory_encryption_op)(struct kvm *kvm, void __user *argp); > }; > > struct kvm_arch_async_pf { > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 2099df8..6a737e9 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -3926,6 +3926,14 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, > return r; > } > > +static int kvm_vm_ioctl_memory_encryption_op(struct kvm *kvm, void __user *argp) > +{ > + if (kvm_x86_ops->memory_encryption_op) > + return kvm_x86_ops->memory_encryption_op(kvm, argp); > + > + return -ENOTTY; > +} > + > long kvm_arch_vm_ioctl(struct file *filp, > unsigned int ioctl, unsigned long arg) > { > @@ -4189,6 +4197,10 @@ long kvm_arch_vm_ioctl(struct file *filp, > r = kvm_vm_ioctl_enable_cap(kvm, &cap); > break; > } > + case KVM_MEMORY_ENCRYPT_OP: { > + r = kvm_vm_ioctl_memory_encryption_op(kvm, argp); > + break; > + } > default: > r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); > } > diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h > index cac48ed..fef7d83 100644 > --- a/include/uapi/linux/kvm.h > +++ b/include/uapi/linux/kvm.h > @@ -1281,6 +1281,8 @@ struct kvm_s390_ucas_mapping { > #define KVM_S390_GET_IRQ_STATE _IOW(KVMIO, 0xb6, struct kvm_s390_irq_state) > /* Available with KVM_CAP_X86_SMM */ > #define KVM_SMI _IO(KVMIO, 0xb7) > +/* Memory Encryption Commands */ > +#define KVM_MEMORY_ENCRYPT_OP _IOWR(KVMIO, 0xb8, unsigned long) > > #define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0) > #define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1) > Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index bff1f15..62651ad 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1033,6 +1033,8 @@ struct kvm_x86_ops { void (*cancel_hv_timer)(struct kvm_vcpu *vcpu); void (*setup_mce)(struct kvm_vcpu *vcpu); + + int (*memory_encryption_op)(struct kvm *kvm, void __user *argp); }; struct kvm_arch_async_pf { diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 2099df8..6a737e9 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3926,6 +3926,14 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, return r; } +static int kvm_vm_ioctl_memory_encryption_op(struct kvm *kvm, void __user *argp) +{ + if (kvm_x86_ops->memory_encryption_op) + return kvm_x86_ops->memory_encryption_op(kvm, argp); + + return -ENOTTY; +} + long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -4189,6 +4197,10 @@ long kvm_arch_vm_ioctl(struct file *filp, r = kvm_vm_ioctl_enable_cap(kvm, &cap); break; } + case KVM_MEMORY_ENCRYPT_OP: { + r = kvm_vm_ioctl_memory_encryption_op(kvm, argp); + break; + } default: r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); } diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index cac48ed..fef7d83 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1281,6 +1281,8 @@ struct kvm_s390_ucas_mapping { #define KVM_S390_GET_IRQ_STATE _IOW(KVMIO, 0xb6, struct kvm_s390_irq_state) /* Available with KVM_CAP_X86_SMM */ #define KVM_SMI _IO(KVMIO, 0xb7) +/* Memory Encryption Commands */ +#define KVM_MEMORY_ENCRYPT_OP _IOWR(KVMIO, 0xb8, unsigned long) #define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0) #define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)
If hardware supports encrypting then KVM_MEMORY_ENCRYPT_OP ioctl can be used by qemu to issue platform specific memory encryption commands. Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/x86.c | 12 ++++++++++++ include/uapi/linux/kvm.h | 2 ++ 3 files changed, 16 insertions(+)