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linux/arch/powerpc/kvm/44x_emulate.c

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/*
* 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 <asm/kvm_ppc.h>
#include <asm/dcr.h>
#include <asm/dcr-regs.h>
#include <asm/disassemble.h>
#include "booke.h"
#include "44x_tlb.h"
#define OP_RFI 19
#define XOP_RFI 50
#define XOP_MFMSR 83
#define XOP_WRTEE 131
#define XOP_MTMSR 146
#define XOP_WRTEEI 163
#define XOP_MFDCR 323
#define XOP_MTDCR 451
#define XOP_TLBSX 914
#define XOP_ICCCI 966
#define XOP_TLBWE 978
static inline void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 new_pid)
{
if (vcpu->arch.pid != new_pid) {
vcpu->arch.pid = new_pid;
vcpu->arch.swap_pid = 1;
}
}
static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
{
vcpu->arch.pc = vcpu->arch.srr0;
kvmppc_set_msr(vcpu, vcpu->arch.srr1);
}
int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance)
{
int emulated = EMULATE_DONE;
int dcrn;
int ra;
int rb;
int rc;
int rs;
int rt;
int ws;
switch (get_op(inst)) {
case OP_RFI:
switch (get_xop(inst)) {
case XOP_RFI:
kvmppc_emul_rfi(vcpu);
*advance = 0;
break;
default:
emulated = EMULATE_FAIL;
break;
}
break;
case 31:
switch (get_xop(inst)) {
case XOP_MFMSR:
rt = get_rt(inst);
vcpu->arch.gpr[rt] = vcpu->arch.msr;
break;
case XOP_MTMSR:
rs = get_rs(inst);
kvmppc_set_msr(vcpu, vcpu->arch.gpr[rs]);
break;
case XOP_WRTEE:
rs = get_rs(inst);
vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
| (vcpu->arch.gpr[rs] & MSR_EE);
break;
case XOP_WRTEEI:
vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
| (inst & MSR_EE);
break;
case XOP_MFDCR:
dcrn = get_dcrn(inst);
rt = get_rt(inst);
/* The guest may access CPR0 registers to determine the timebase
* frequency, and it must know the real host frequency because it
* can directly access the timebase registers.
*
* It would be possible to emulate those accesses in userspace,
* but userspace can really only figure out the end frequency.
* We could decompose that into the factors that compute it, but
* that's tricky math, and it's easier to just report the real
* CPR0 values.
*/
switch (dcrn) {
case DCRN_CPR0_CONFIG_ADDR:
vcpu->arch.gpr[rt] = vcpu->arch.cpr0_cfgaddr;
break;
case DCRN_CPR0_CONFIG_DATA:
local_irq_disable();
mtdcr(DCRN_CPR0_CONFIG_ADDR,
vcpu->arch.cpr0_cfgaddr);
vcpu->arch.gpr[rt] = mfdcr(DCRN_CPR0_CONFIG_DATA);
local_irq_enable();
break;
default:
run->dcr.dcrn = dcrn;
run->dcr.data = 0;
run->dcr.is_write = 0;
vcpu->arch.io_gpr = rt;
vcpu->arch.dcr_needed = 1;
emulated = EMULATE_DO_DCR;
}
break;
case XOP_MTDCR:
dcrn = get_dcrn(inst);
rs = get_rs(inst);
/* emulate some access in kernel */
switch (dcrn) {
case DCRN_CPR0_CONFIG_ADDR:
vcpu->arch.cpr0_cfgaddr = vcpu->arch.gpr[rs];
break;
default:
run->dcr.dcrn = dcrn;
run->dcr.data = vcpu->arch.gpr[rs];
run->dcr.is_write = 1;
vcpu->arch.dcr_needed = 1;
emulated = EMULATE_DO_DCR;
}
break;
case XOP_TLBWE:
ra = get_ra(inst);
rs = get_rs(inst);
ws = get_ws(inst);
emulated = kvmppc_44x_emul_tlbwe(vcpu, ra, rs, ws);
break;
case XOP_TLBSX:
rt = get_rt(inst);
ra = get_ra(inst);
rb = get_rb(inst);
rc = get_rc(inst);
emulated = kvmppc_44x_emul_tlbsx(vcpu, rt, ra, rb, rc);
break;
case XOP_ICCCI:
break;
default:
emulated = EMULATE_FAIL;
}
break;
default:
emulated = EMULATE_FAIL;
}
return emulated;
}
int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
{
switch (sprn) {
case SPRN_MMUCR:
vcpu->arch.mmucr = vcpu->arch.gpr[rs]; break;
case SPRN_PID:
kvmppc_set_pid(vcpu, vcpu->arch.gpr[rs]); break;
case SPRN_CCR0:
vcpu->arch.ccr0 = vcpu->arch.gpr[rs]; break;
case SPRN_CCR1:
vcpu->arch.ccr1 = vcpu->arch.gpr[rs]; break;
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_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[0] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR1:
vcpu->arch.ivor[1] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR2:
vcpu->arch.ivor[2] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR3:
vcpu->arch.ivor[3] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR4:
vcpu->arch.ivor[4] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR5:
vcpu->arch.ivor[5] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR6:
vcpu->arch.ivor[6] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR7:
vcpu->arch.ivor[7] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR8:
vcpu->arch.ivor[8] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR9:
vcpu->arch.ivor[9] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR10:
vcpu->arch.ivor[10] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR11:
vcpu->arch.ivor[11] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR12:
vcpu->arch.ivor[12] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR13:
vcpu->arch.ivor[13] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR14:
vcpu->arch.ivor[14] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR15:
vcpu->arch.ivor[15] = vcpu->arch.gpr[rs]; break;
default:
return EMULATE_FAIL;
}
return EMULATE_DONE;
}
int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
{
switch (sprn) {
/* 440 */
case SPRN_MMUCR:
vcpu->arch.gpr[rt] = vcpu->arch.mmucr; break;
case SPRN_CCR0:
vcpu->arch.gpr[rt] = vcpu->arch.ccr0; break;
case SPRN_CCR1:
vcpu->arch.gpr[rt] = vcpu->arch.ccr1; break;
/* Book E */
case SPRN_PID:
vcpu->arch.gpr[rt] = vcpu->arch.pid; break;
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_IVOR0:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[0]; break;
case SPRN_IVOR1:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[1]; break;
case SPRN_IVOR2:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[2]; break;
case SPRN_IVOR3:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[3]; break;
case SPRN_IVOR4:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[4]; break;
case SPRN_IVOR5:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[5]; break;
case SPRN_IVOR6:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[6]; break;
case SPRN_IVOR7:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[7]; break;
case SPRN_IVOR8:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[8]; break;
case SPRN_IVOR9:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[9]; break;
case SPRN_IVOR10:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[10]; break;
case SPRN_IVOR11:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[11]; break;
case SPRN_IVOR12:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[12]; break;
case SPRN_IVOR13:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[13]; break;
case SPRN_IVOR14:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[14]; break;
case SPRN_IVOR15:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[15]; break;
default:
return EMULATE_FAIL;
}
return EMULATE_DONE;
}
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