KVM: PPC: BookE: Add EPR ONE_REG sync
We need to be able to read and write the contents of the EPR register
from user space.
This patch implements that logic through the ONE_REG API and declares
its (never implemented) SREGS counterpart as deprecated.
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 940ec80..8779cd4c 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -300,6 +300,15 @@
#endif
}
+static unsigned long get_guest_epr(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_KVM_BOOKE_HV
+ return mfspr(SPRN_GEPR);
+#else
+ return vcpu->arch.epr;
+#endif
+}
+
/* Deliver the interrupt of the corresponding priority, if possible. */
static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
unsigned int priority)
@@ -1405,6 +1414,11 @@
&vcpu->arch.dbg_reg.dac[dac], sizeof(u64));
break;
}
+ case KVM_REG_PPC_EPR: {
+ u32 epr = get_guest_epr(vcpu);
+ r = put_user(epr, (u32 __user *)(long)reg->addr);
+ break;
+ }
#if defined(CONFIG_64BIT)
case KVM_REG_PPC_EPCR:
r = put_user(vcpu->arch.epcr, (u32 __user *)(long)reg->addr);
@@ -1437,6 +1451,13 @@
(u64 __user *)(long)reg->addr, sizeof(u64));
break;
}
+ case KVM_REG_PPC_EPR: {
+ u32 new_epr;
+ r = get_user(new_epr, (u32 __user *)(long)reg->addr);
+ if (!r)
+ kvmppc_set_epr(vcpu, new_epr);
+ break;
+ }
#if defined(CONFIG_64BIT)
case KVM_REG_PPC_EPCR: {
u32 new_epcr;