This patch adds a stub (always failing) implementation of the hypercalls
for the HPT resizing PAPR extension.
For now we include a hack which makes it safe for qemu to call ENABLE_HCALL
on these hypercalls, although it will have no effect. That should go away
once the PAPR change is formalized and we can use "real" hcall numbers.
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
---
arch/powerpc/include/asm/kvm_book3s.h | 6 ++++++
arch/powerpc/kvm/book3s_64_mmu_hv.c | 19 +++++++++++++++++++
arch/powerpc/kvm/book3s_hv.c | 8 ++++++++
arch/powerpc/kvm/powerpc.c | 6 ++++++
4 files changed, 39 insertions(+)
diff --git a/arch/powerpc/include/asm/kvm_book3s.h
b/arch/powerpc/include/asm/kvm_book3s.h
index 8f39796..81f2b77 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -191,6 +191,12 @@ extern void kvmppc_copy_to_svcpu(struct
kvmppc_book3s_shadow_vcpu *svcpu,
struct kvm_vcpu *vcpu);
extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
struct kvmppc_book3s_shadow_vcpu *svcpu);
+extern unsigned long do_h_resize_hpt_prepare(struct kvm_vcpu *vcpu,
+ unsigned long flags,
+ unsigned long shift);
+extern unsigned long do_h_resize_hpt_commit(struct kvm_vcpu *vcpu,
+ unsigned long flags,
+ unsigned long shift);
static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
{
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 4547b6e..b92384f 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -1118,6 +1118,25 @@ void kvmppc_unpin_guest_page(struct kvm *kvm, void *va,
unsigned long gpa,
}
/*
+ * HPT resizing
+ */
+
+unsigned long do_h_resize_hpt_prepare(struct kvm_vcpu *vcpu,
+ unsigned long flags,
+ unsigned long shift)
+{
+ return H_HARDWARE;
+}
+
+unsigned long do_h_resize_hpt_commit(struct kvm_vcpu *vcpu,
+ unsigned long flags,
+ unsigned long shift)
+{
+ return H_HARDWARE;
+}
+
+
+/*
* 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 a2730ca..5a451f8 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -726,6 +726,14 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
kvmppc_get_gpr(vcpu, 5),
kvmppc_get_gpr(vcpu, 6));
break;
+ case H_RESIZE_HPT_PREPARE:
+ ret = do_h_resize_hpt_prepare(vcpu, kvmppc_get_gpr(vcpu, 4),
+ kvmppc_get_gpr(vcpu, 5));
+ break;
+ case H_RESIZE_HPT_COMMIT:
+ ret = do_h_resize_hpt_commit(vcpu, kvmppc_get_gpr(vcpu, 4),
+ kvmppc_get_gpr(vcpu, 5));
+ break;
case H_RTAS:
if (list_empty(&vcpu->kvm->arch.rtas_tokens))
return RESUME_HOST;
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index a4250f1..eeda4a8 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -1287,6 +1287,12 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
unsigned long hcall = cap->args[0];
r = -EINVAL;
+ /* Hack: until we have proper hcall numbers allocated */
+ if ((hcall == H_RESIZE_HPT_PREPARE)
+ || (hcall == H_RESIZE_HPT_COMMIT)) {
+ r = 0;
+ break;
+ }
if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
cap->args[1] > 1)
break;
--
2.5.0
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