/* * 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. 2007 * Copyright 2011 Freescale Semiconductor, Inc. * * Authors: Hollis Blanchard */ #include #include #include #include #include #include #include #include #include #include #include #include #include "timing.h" #include "trace.h" /* XXX to do: * lhax * lhaux * lswx * lswi * stswx * stswi * lha * lhau * lmw * stmw * */ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; u32 inst; int ra, rs, rt; 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; ra = get_ra(inst); rs = get_rs(inst); rt = get_rt(inst); switch (get_op(inst)) { case 31: switch (get_xop(inst)) { 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_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_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_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: emulated = EMULATE_FAIL; break; } 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 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: emulated = EMULATE_FAIL; break; } if (emulated == EMULATE_FAIL) { advance = 0; kvmppc_core_queue_program(vcpu, 0); } trace_kvm_ppc_instr(inst, kvmppc_get_pc(vcpu), emulated); /* Advance past emulated instruction. */ if (advance) kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4); return emulated; }