KVM: PPC: Book3S: Add GET/SET_ONE_REG interface for VRSAVE
The VRSAVE register value for a vcpu is accessible through the
GET/SET_SREGS interface for Book E processors, but not for Book 3S
processors. In order to make this accessible for Book 3S processors,
this adds a new register identifier for GET/SET_ONE_REG, and adds
the code to implement it.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 700df6f..f97369d 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -528,6 +528,9 @@
}
val = get_reg_val(reg->id, vcpu->arch.vscr.u[3]);
break;
+ case KVM_REG_PPC_VRSAVE:
+ val = get_reg_val(reg->id, vcpu->arch.vrsave);
+ break;
#endif /* CONFIG_ALTIVEC */
case KVM_REG_PPC_DEBUG_INST: {
u32 opcode = INS_TW;
@@ -605,6 +608,13 @@
}
vcpu->arch.vscr.u[3] = set_reg_val(reg->id, val);
break;
+ case KVM_REG_PPC_VRSAVE:
+ if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
+ r = -ENXIO;
+ break;
+ }
+ vcpu->arch.vrsave = set_reg_val(reg->id, val);
+ break;
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_KVM_XICS
case KVM_REG_PPC_ICP_STATE: