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-rw-r--r--arch/powerpc/kvm/powerpc.c88
1 files changed, 87 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 72a4ad8..2f87a16 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -38,9 +38,56 @@
int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
- return !(v->arch.msr & MSR_WE) || !!(v->arch.pending_exceptions);
+ return !(v->arch.shared->msr & MSR_WE) ||
+ !!(v->arch.pending_exceptions);
}
+int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
+{
+ int nr = kvmppc_get_gpr(vcpu, 11);
+ int r;
+ unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
+ unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
+ unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
+ unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
+ unsigned long r2 = 0;
+
+ if (!(vcpu->arch.shared->msr & MSR_SF)) {
+ /* 32 bit mode */
+ param1 &= 0xffffffff;
+ param2 &= 0xffffffff;
+ param3 &= 0xffffffff;
+ param4 &= 0xffffffff;
+ }
+
+ switch (nr) {
+ case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
+ {
+ vcpu->arch.magic_page_pa = param1;
+ vcpu->arch.magic_page_ea = param2;
+
+ r2 = KVM_MAGIC_FEAT_SR;
+
+ r = HC_EV_SUCCESS;
+ break;
+ }
+ case HC_VENDOR_KVM | KVM_HC_FEATURES:
+ r = HC_EV_SUCCESS;
+#if defined(CONFIG_PPC_BOOK3S) /* XXX Missing magic page on BookE */
+ r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
+#endif
+
+ /* Second return value is in r4 */
+ break;
+ default:
+ r = HC_EV_UNIMPLEMENTED;
+ break;
+ }
+
+ kvmppc_set_gpr(vcpu, 4, r2);
+
+ return r;
+}
int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
@@ -145,8 +192,10 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_PPC_SEGSTATE:
case KVM_CAP_PPC_PAIRED_SINGLES:
case KVM_CAP_PPC_UNSET_IRQ:
+ case KVM_CAP_PPC_IRQ_LEVEL:
case KVM_CAP_ENABLE_CAP:
case KVM_CAP_PPC_OSI:
+ case KVM_CAP_PPC_GET_PVINFO:
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
@@ -534,16 +583,53 @@ out:
return r;
}
+static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
+{
+ u32 inst_lis = 0x3c000000;
+ u32 inst_ori = 0x60000000;
+ u32 inst_nop = 0x60000000;
+ u32 inst_sc = 0x44000002;
+ u32 inst_imm_mask = 0xffff;
+
+ /*
+ * The hypercall to get into KVM from within guest context is as
+ * follows:
+ *
+ * lis r0, r0, KVM_SC_MAGIC_R0@h
+ * ori r0, KVM_SC_MAGIC_R0@l
+ * sc
+ * nop
+ */
+ pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
+ pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
+ pvinfo->hcall[2] = inst_sc;
+ pvinfo->hcall[3] = inst_nop;
+
+ return 0;
+}
+
long kvm_arch_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
+ void __user *argp = (void __user *)arg;
long r;
switch (ioctl) {
+ case KVM_PPC_GET_PVINFO: {
+ struct kvm_ppc_pvinfo pvinfo;
+ r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
+ if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
+ r = -EFAULT;
+ goto out;
+ }
+
+ break;
+ }
default:
r = -ENOTTY;
}
+out:
return r;
}
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