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-rw-r--r--arch/powerpc/kvm/booke_emulate.c266
1 files changed, 266 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/booke_emulate.c b/arch/powerpc/kvm/booke_emulate.c
new file mode 100644
index 0000000..aebc65e
--- /dev/null
+++ b/arch/powerpc/kvm/booke_emulate.c
@@ -0,0 +1,266 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright IBM Corp. 2008
+ *
+ * Authors: Hollis Blanchard <hollisb@us.ibm.com>
+ */
+
+#include <linux/kvm_host.h>
+#include <asm/disassemble.h>
+
+#include "booke.h"
+
+#define OP_19_XOP_RFI 50
+
+#define OP_31_XOP_MFMSR 83
+#define OP_31_XOP_WRTEE 131
+#define OP_31_XOP_MTMSR 146
+#define OP_31_XOP_WRTEEI 163
+
+static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.pc = vcpu->arch.srr0;
+ kvmppc_set_msr(vcpu, vcpu->arch.srr1);
+}
+
+int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
+ unsigned int inst, int *advance)
+{
+ int emulated = EMULATE_DONE;
+ int rs;
+ int rt;
+
+ switch (get_op(inst)) {
+ case 19:
+ switch (get_xop(inst)) {
+ case OP_19_XOP_RFI:
+ kvmppc_emul_rfi(vcpu);
+ kvmppc_set_exit_type(vcpu, EMULATED_RFI_EXITS);
+ *advance = 0;
+ break;
+
+ default:
+ emulated = EMULATE_FAIL;
+ break;
+ }
+ break;
+
+ case 31:
+ switch (get_xop(inst)) {
+
+ case OP_31_XOP_MFMSR:
+ rt = get_rt(inst);
+ vcpu->arch.gpr[rt] = vcpu->arch.msr;
+ kvmppc_set_exit_type(vcpu, EMULATED_MFMSR_EXITS);
+ break;
+
+ case OP_31_XOP_MTMSR:
+ rs = get_rs(inst);
+ kvmppc_set_exit_type(vcpu, EMULATED_MTMSR_EXITS);
+ kvmppc_set_msr(vcpu, vcpu->arch.gpr[rs]);
+ break;
+
+ case OP_31_XOP_WRTEE:
+ rs = get_rs(inst);
+ vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
+ | (vcpu->arch.gpr[rs] & MSR_EE);
+ kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
+ break;
+
+ case OP_31_XOP_WRTEEI:
+ vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
+ | (inst & MSR_EE);
+ kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
+ break;
+
+ default:
+ emulated = EMULATE_FAIL;
+ }
+
+ break;
+
+ default:
+ emulated = EMULATE_FAIL;
+ }
+
+ return emulated;
+}
+
+int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
+{
+ int emulated = EMULATE_DONE;
+
+ switch (sprn) {
+ case SPRN_DEAR:
+ vcpu->arch.dear = vcpu->arch.gpr[rs]; break;
+ case SPRN_ESR:
+ vcpu->arch.esr = vcpu->arch.gpr[rs]; break;
+ case SPRN_DBCR0:
+ vcpu->arch.dbcr0 = vcpu->arch.gpr[rs]; break;
+ case SPRN_DBCR1:
+ vcpu->arch.dbcr1 = vcpu->arch.gpr[rs]; break;
+ case SPRN_DBSR:
+ vcpu->arch.dbsr &= ~vcpu->arch.gpr[rs]; break;
+ case SPRN_TSR:
+ vcpu->arch.tsr &= ~vcpu->arch.gpr[rs]; break;
+ case SPRN_TCR:
+ vcpu->arch.tcr = vcpu->arch.gpr[rs];
+ kvmppc_emulate_dec(vcpu);
+ break;
+
+ /* Note: SPRG4-7 are user-readable. These values are
+ * loaded into the real SPRGs when resuming the
+ * guest. */
+ case SPRN_SPRG4:
+ vcpu->arch.sprg4 = vcpu->arch.gpr[rs]; break;
+ case SPRN_SPRG5:
+ vcpu->arch.sprg5 = vcpu->arch.gpr[rs]; break;
+ case SPRN_SPRG6:
+ vcpu->arch.sprg6 = vcpu->arch.gpr[rs]; break;
+ case SPRN_SPRG7:
+ vcpu->arch.sprg7 = vcpu->arch.gpr[rs]; break;
+
+ case SPRN_IVPR:
+ vcpu->arch.ivpr = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR0:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR1:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR2:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR3:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR4:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR5:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR6:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR7:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR8:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR9:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR10:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR11:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR12:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR13:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR14:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = vcpu->arch.gpr[rs];
+ break;
+ case SPRN_IVOR15:
+ vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = vcpu->arch.gpr[rs];
+ break;
+
+ default:
+ emulated = EMULATE_FAIL;
+ }
+
+ return emulated;
+}
+
+int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
+{
+ int emulated = EMULATE_DONE;
+
+ switch (sprn) {
+ case SPRN_IVPR:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivpr; break;
+ case SPRN_DEAR:
+ vcpu->arch.gpr[rt] = vcpu->arch.dear; break;
+ case SPRN_ESR:
+ vcpu->arch.gpr[rt] = vcpu->arch.esr; break;
+ case SPRN_DBCR0:
+ vcpu->arch.gpr[rt] = vcpu->arch.dbcr0; break;
+ case SPRN_DBCR1:
+ vcpu->arch.gpr[rt] = vcpu->arch.dbcr1; break;
+ case SPRN_DBSR:
+ vcpu->arch.gpr[rt] = vcpu->arch.dbsr; break;
+
+ case SPRN_IVOR0:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
+ break;
+ case SPRN_IVOR1:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
+ break;
+ case SPRN_IVOR2:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
+ break;
+ case SPRN_IVOR3:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
+ break;
+ case SPRN_IVOR4:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
+ break;
+ case SPRN_IVOR5:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
+ break;
+ case SPRN_IVOR6:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
+ break;
+ case SPRN_IVOR7:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
+ break;
+ case SPRN_IVOR8:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
+ break;
+ case SPRN_IVOR9:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
+ break;
+ case SPRN_IVOR10:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
+ break;
+ case SPRN_IVOR11:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
+ break;
+ case SPRN_IVOR12:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
+ break;
+ case SPRN_IVOR13:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
+ break;
+ case SPRN_IVOR14:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
+ break;
+ case SPRN_IVOR15:
+ vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
+ break;
+
+ default:
+ emulated = EMULATE_FAIL;
+ }
+
+ return emulated;
+}
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