Commit 71db4089 authored by Alexander Graf's avatar Alexander Graf Committed by Avi Kivity
Browse files

KVM: PPC: Implement mtsr instruction emulation 



The Book3S_32 specifications allows for two instructions to modify segment
registers: mtsrin and mtsr.

Most normal operating systems use mtsrin, because it allows to define which
segment it wants to change using a register. But since I was trying to run
an embedded guest, it turned out to be using mtsr with hardcoded values.

So let's also emulate mtsr. It's a valid instruction after all.

Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent e425a6de

arch/powerpc/kvm/book3s_64_emulate.c

+6 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#define OP_31_XOP_MFMSR		83

#define OP_31_XOP_MTMSR		146

#define OP_31_XOP_MTMSRD	178

#define OP_31_XOP_MTSR		210

#define OP_31_XOP_MTSRIN	242

#define OP_31_XOP_TLBIEL	274

#define OP_31_XOP_TLBIE		306
@@ -101,6 +102,11 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, 
			}

			break;

		}

		case OP_31_XOP_MTSR:

			vcpu->arch.mmu.mtsrin(vcpu,

				(inst >> 16) & 0xf,

				kvmppc_get_gpr(vcpu, get_rs(inst)));

			break;

		case OP_31_XOP_MTSRIN:

			vcpu->arch.mmu.mtsrin(vcpu,

				(kvmppc_get_gpr(vcpu, get_rb(inst)) >> 28) & 0xf,