diff mbox

[08/11] powerpc/kvm: KVM-HV HPT resizing stub implementation

Message ID 20161215055404.29351-9-david@gibson.dropbear.id.au (mailing list archive)
State New, archived
Headers show

Commit Message

David Gibson Dec. 15, 2016, 5:54 a.m. UTC 
This patch adds a stub (always failing) implementation of the ioctl()s
for the HPT resizing PAPR extension.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 arch/powerpc/include/asm/kvm_ppc.h  |  4 ++++
 arch/powerpc/kvm/book3s_64_mmu_hv.c | 16 ++++++++++++++++
 arch/powerpc/kvm/book3s_hv.c        | 22 ++++++++++++++++++++++
 3 files changed, 42 insertions(+)

Comments

Thomas Huth Dec. 16, 2016, 3:35 p.m. UTC | #1 
On 15.12.2016 06:54, David Gibson wrote:
> This patch adds a stub (always failing) implementation of the ioctl()s
> for the HPT resizing PAPR extension.
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
> ---
>  arch/powerpc/include/asm/kvm_ppc.h  |  4 ++++
>  arch/powerpc/kvm/book3s_64_mmu_hv.c | 16 ++++++++++++++++
>  arch/powerpc/kvm/book3s_hv.c        | 22 ++++++++++++++++++++++
>  3 files changed, 42 insertions(+)

I think I'd just squash this with the patch where you do the real
implementation.

 Thomas

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diff mbox

Patch

diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 3b837bc..f8eaed0 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -215,6 +215,10 @@  extern void kvmppc_bookehv_exit(void);
 extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu);
 
 extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *);
+extern long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
+					    struct kvm_ppc_resize_hpt *rhpt);
+extern long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
+					   struct kvm_ppc_resize_hpt *rhpt);
 
 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
 
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index cd145eb..ac0f18b 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -1160,6 +1160,22 @@  void kvmppc_unpin_guest_page(struct kvm *kvm, void *va, unsigned long gpa,
 }
 
 /*
+ * HPT resizing
+ */
+
+long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
+				     struct kvm_ppc_resize_hpt *rhpt)
+{
+	return -EIO;
+}
+
+long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
+				    struct kvm_ppc_resize_hpt *rhpt)
+{
+	return -EIO;
+}
+
+/*
  * Functions for reading and writing the hash table via reads and
  * writes on a file descriptor.
  *
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 957e473..d022322 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -3617,6 +3617,28 @@  static long kvm_arch_vm_ioctl_hv(struct file *filp,
 		break;
 	}
 
+	case KVM_PPC_RESIZE_HPT_PREPARE: {
+		struct kvm_ppc_resize_hpt rhpt;
+
+		r = -EFAULT;
+		if (copy_from_user(&rhpt, argp, sizeof(rhpt)))
+			break;
+
+		r = kvm_vm_ioctl_resize_hpt_prepare(kvm, &rhpt);
+		break;
+	}
+
+	case KVM_PPC_RESIZE_HPT_COMMIT: {
+		struct kvm_ppc_resize_hpt rhpt;
+
+		r = -EFAULT;
+		if (copy_from_user(&rhpt, argp, sizeof(rhpt)))
+			break;
+
+		r = kvm_vm_ioctl_resize_hpt_commit(kvm, &rhpt);
+		break;
+	}
+
 	default:
 		r = -ENOTTY;
 	}