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Diffstat (limited to 'arch/powerpc/kvm/emulate.c')
-rw-r--r--arch/powerpc/kvm/emulate.c215
1 files changed, 23 insertions, 192 deletions
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index da86d9ba3476..5cc2e7af3a7b 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -207,36 +207,28 @@ static int kvmppc_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
return emulated;
}
-/* XXX to do:
- * lhax
- * lhaux
- * lswx
- * lswi
- * stswx
- * stswi
- * lha
- * lhau
- * lmw
- * stmw
- *
- */
/* XXX Should probably auto-generate instruction decoding for a particular core
* from opcode tables in the future. */
int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
- u32 inst = kvmppc_get_last_inst(vcpu);
- int ra = get_ra(inst);
- int rs = get_rs(inst);
- int rt = get_rt(inst);
- int sprn = get_sprn(inst);
- enum emulation_result emulated = EMULATE_DONE;
+ u32 inst;
+ int rs, rt, sprn;
+ enum emulation_result emulated;
int advance = 1;
/* this default type might be overwritten by subcategories */
kvmppc_set_exit_type(vcpu, EMULATED_INST_EXITS);
+ emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &inst);
+ if (emulated != EMULATE_DONE)
+ return emulated;
+
pr_debug("Emulating opcode %d / %d\n", get_op(inst), get_xop(inst));
+ rs = get_rs(inst);
+ rt = get_rt(inst);
+ sprn = get_sprn(inst);
+
switch (get_op(inst)) {
case OP_TRAP:
#ifdef CONFIG_PPC_BOOK3S
@@ -264,198 +256,37 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
#endif
advance = 0;
break;
- case OP_31_XOP_LWZX:
- emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
- break;
-
- case OP_31_XOP_LBZX:
- emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
- break;
-
- case OP_31_XOP_LBZUX:
- emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
- case OP_31_XOP_STWX:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 4, 1);
- break;
-
- case OP_31_XOP_STBX:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 1, 1);
- break;
-
- case OP_31_XOP_STBUX:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 1, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
- case OP_31_XOP_LHAX:
- emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
- break;
-
- case OP_31_XOP_LHZX:
- emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
- break;
-
- case OP_31_XOP_LHZUX:
- emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
case OP_31_XOP_MFSPR:
emulated = kvmppc_emulate_mfspr(vcpu, sprn, rt);
break;
- case OP_31_XOP_STHX:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 2, 1);
- break;
-
- case OP_31_XOP_STHUX:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 2, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
case OP_31_XOP_MTSPR:
emulated = kvmppc_emulate_mtspr(vcpu, sprn, rs);
break;
- case OP_31_XOP_DCBST:
- case OP_31_XOP_DCBF:
- case OP_31_XOP_DCBI:
- /* Do nothing. The guest is performing dcbi because
- * hardware DMA is not snooped by the dcache, but
- * emulated DMA either goes through the dcache as
- * normal writes, or the host kernel has handled dcache
- * coherence. */
- break;
-
- case OP_31_XOP_LWBRX:
- emulated = kvmppc_handle_load(run, vcpu, rt, 4, 0);
- break;
-
case OP_31_XOP_TLBSYNC:
break;
- case OP_31_XOP_STWBRX:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 4, 0);
- break;
-
- case OP_31_XOP_LHBRX:
- emulated = kvmppc_handle_load(run, vcpu, rt, 2, 0);
- break;
-
- case OP_31_XOP_STHBRX:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 2, 0);
- break;
-
default:
/* Attempt core-specific emulation below. */
emulated = EMULATE_FAIL;
}
break;
- case OP_LWZ:
- emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
- break;
-
- /* TBD: Add support for other 64 bit load variants like ldu, ldux, ldx etc. */
- case OP_LD:
- rt = get_rt(inst);
- emulated = kvmppc_handle_load(run, vcpu, rt, 8, 1);
- break;
-
- case OP_LWZU:
- emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
- case OP_LBZ:
- emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
- break;
-
- case OP_LBZU:
- emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
- case OP_STW:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 4, 1);
- break;
-
- /* TBD: Add support for other 64 bit store variants like stdu, stdux, stdx etc. */
- case OP_STD:
- rs = get_rs(inst);
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 8, 1);
- break;
-
- case OP_STWU:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 4, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
- case OP_STB:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 1, 1);
- break;
-
- case OP_STBU:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 1, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
- case OP_LHZ:
- emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
- break;
-
- case OP_LHZU:
- emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
- case OP_LHA:
- emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
- break;
-
- case OP_LHAU:
- emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
- break;
-
- case OP_STH:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 2, 1);
- break;
+ case 0:
+ /*
+ * Instruction with primary opcode 0. Based on PowerISA
+ * these are illegal instructions.
+ */
+ if (inst == KVMPPC_INST_SW_BREAKPOINT) {
+ run->exit_reason = KVM_EXIT_DEBUG;
+ run->debug.arch.address = kvmppc_get_pc(vcpu);
+ emulated = EMULATE_EXIT_USER;
+ advance = 0;
+ } else
+ emulated = EMULATE_FAIL;
- case OP_STHU:
- emulated = kvmppc_handle_store(run, vcpu,
- kvmppc_get_gpr(vcpu, rs),
- 2, 1);
- kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
default:
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-18 02:58:59 +0300