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Diffstat (limited to 'arch/powerpc/kvm/book3s_emulate.c')
-rw-r--r--arch/powerpc/kvm/book3s_emulate.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index 04c29e01b391..b7530cf58834 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -52,6 +52,7 @@
#define OP_31_XOP_TBEGIN 654
#define OP_31_XOP_TRECLAIM 942
+#define OP_31_XOP_TRCHKPT 1006
/* DCBZ is actually 1014, but we patch it to 1010 so we get a trap */
#define OP_31_XOP_DCBZ 1010
@@ -172,6 +173,29 @@ static void kvmppc_emulate_treclaim(struct kvm_vcpu *vcpu, int ra_val)
kvmppc_set_msr(vcpu, guest_msr);
preempt_enable();
}
+
+static void kvmppc_emulate_trchkpt(struct kvm_vcpu *vcpu)
+{
+ unsigned long guest_msr = kvmppc_get_msr(vcpu);
+
+ preempt_disable();
+ /*
+ * need flush FP/VEC/VSX to vcpu save area before
+ * copy.
+ */
+ kvmppc_giveup_ext(vcpu, MSR_VSX);
+ kvmppc_copyto_vcpu_tm(vcpu);
+ kvmppc_save_tm_sprs(vcpu);
+
+ /*
+ * as a result of trecheckpoint. set TS to suspended.
+ */
+ guest_msr &= ~(MSR_TS_MASK);
+ guest_msr |= MSR_TS_S;
+ kvmppc_set_msr(vcpu, guest_msr);
+ kvmppc_restore_tm_pr(vcpu);
+ preempt_enable();
+}
#endif
int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
@@ -478,6 +502,43 @@ int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_emulate_treclaim(vcpu, ra_val);
break;
}
+ case OP_31_XOP_TRCHKPT:
+ {
+ ulong guest_msr = kvmppc_get_msr(vcpu);
+ unsigned long texasr;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ break;
+
+ if (!(kvmppc_get_msr(vcpu) & MSR_TM)) {
+ kvmppc_trigger_fac_interrupt(vcpu, FSCR_TM_LG);
+ emulated = EMULATE_AGAIN;
+ break;
+ }
+
+ /* generate interrupt based on priorities */
+ if (guest_msr & MSR_PR) {
+ /* Privileged Instruction type Program Intr */
+ kvmppc_core_queue_program(vcpu, SRR1_PROGPRIV);
+ emulated = EMULATE_AGAIN;
+ break;
+ }
+
+ tm_enable();
+ texasr = mfspr(SPRN_TEXASR);
+ tm_disable();
+
+ if (MSR_TM_ACTIVE(guest_msr) ||
+ !(texasr & (TEXASR_FS))) {
+ /* TM bad thing interrupt */
+ kvmppc_core_queue_program(vcpu, SRR1_PROGTM);
+ emulated = EMULATE_AGAIN;
+ break;
+ }
+
+ kvmppc_emulate_trchkpt(vcpu);
+ break;
+ }
#endif
default:
emulated = EMULATE_FAIL;