273 lines
6.7 KiB
C
273 lines
6.7 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright IBM Corp. 2007
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* Copyright 2011 Freescale Semiconductor, Inc.
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#include <linux/jiffies.h>
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#include <linux/hrtimer.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kvm_host.h>
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#include <linux/clockchips.h>
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#include <asm/reg.h>
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#include <asm/time.h>
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#include <asm/byteorder.h>
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#include <asm/kvm_ppc.h>
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#include <asm/disassemble.h>
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#include <asm/ppc-opcode.h>
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#include "timing.h"
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#include "trace.h"
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/* XXX to do:
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* lhax
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* lhaux
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* lswx
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* lswi
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* stswx
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* stswi
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* lha
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* lhau
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* lmw
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* stmw
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*
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*/
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int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
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{
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struct kvm_run *run = vcpu->run;
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u32 inst;
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int ra, rs, rt;
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enum emulation_result emulated;
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int advance = 1;
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/* this default type might be overwritten by subcategories */
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kvmppc_set_exit_type(vcpu, EMULATED_INST_EXITS);
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emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &inst);
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if (emulated != EMULATE_DONE)
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return emulated;
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ra = get_ra(inst);
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rs = get_rs(inst);
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rt = get_rt(inst);
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switch (get_op(inst)) {
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case 31:
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switch (get_xop(inst)) {
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case OP_31_XOP_LWZX:
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emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
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break;
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case OP_31_XOP_LBZX:
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emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
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break;
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case OP_31_XOP_LBZUX:
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emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_31_XOP_STWX:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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4, 1);
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break;
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case OP_31_XOP_STBX:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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1, 1);
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break;
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case OP_31_XOP_STBUX:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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1, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_31_XOP_LHAX:
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emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
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break;
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case OP_31_XOP_LHZX:
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emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
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break;
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case OP_31_XOP_LHZUX:
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emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_31_XOP_STHX:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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2, 1);
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break;
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case OP_31_XOP_STHUX:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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2, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_31_XOP_DCBST:
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case OP_31_XOP_DCBF:
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case OP_31_XOP_DCBI:
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/* Do nothing. The guest is performing dcbi because
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* hardware DMA is not snooped by the dcache, but
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* emulated DMA either goes through the dcache as
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* normal writes, or the host kernel has handled dcache
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* coherence. */
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break;
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case OP_31_XOP_LWBRX:
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emulated = kvmppc_handle_load(run, vcpu, rt, 4, 0);
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break;
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case OP_31_XOP_STWBRX:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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4, 0);
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break;
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case OP_31_XOP_LHBRX:
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emulated = kvmppc_handle_load(run, vcpu, rt, 2, 0);
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break;
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case OP_31_XOP_STHBRX:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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2, 0);
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break;
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default:
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emulated = EMULATE_FAIL;
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break;
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}
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break;
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case OP_LWZ:
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emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
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break;
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/* TBD: Add support for other 64 bit load variants like ldu, ldux, ldx etc. */
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case OP_LD:
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rt = get_rt(inst);
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emulated = kvmppc_handle_load(run, vcpu, rt, 8, 1);
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break;
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case OP_LWZU:
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emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_LBZ:
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emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
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break;
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case OP_LBZU:
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emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_STW:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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4, 1);
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break;
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/* TBD: Add support for other 64 bit store variants like stdu, stdux, stdx etc. */
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case OP_STD:
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rs = get_rs(inst);
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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8, 1);
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break;
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case OP_STWU:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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4, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_STB:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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1, 1);
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break;
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case OP_STBU:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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1, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_LHZ:
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emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
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break;
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case OP_LHZU:
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emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_LHA:
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emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
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break;
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case OP_LHAU:
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emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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case OP_STH:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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2, 1);
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break;
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case OP_STHU:
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emulated = kvmppc_handle_store(run, vcpu,
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kvmppc_get_gpr(vcpu, rs),
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2, 1);
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kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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break;
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default:
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emulated = EMULATE_FAIL;
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break;
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}
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if (emulated == EMULATE_FAIL) {
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advance = 0;
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kvmppc_core_queue_program(vcpu, 0);
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}
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trace_kvm_ppc_instr(inst, kvmppc_get_pc(vcpu), emulated);
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/* Advance past emulated instruction. */
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if (advance)
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kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
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return emulated;
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}
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