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kernel-ark/arch/powerpc/kvm/e500_emulate.c
Alexander Graf 8e5b26b55a KVM: PPC: Use accessor functions for GPR access 
All code in PPC KVM currently accesses gprs in the vcpu struct directly.

While there's nothing wrong with that wrt the current way gprs are stored
and loaded, it doesn't suffice for the PACA acceleration that will follow
in this patchset.

So let's just create little wrapper inline functions that we call whenever
a GPR needs to be read from or written to. The compiled code shouldn't really
change at all for now.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-01 12:35:47 -03:00

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/*
* Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: Yu Liu, <yu.liu@freescale.com>
*
* Description:
* This file is derived from arch/powerpc/kvm/44x_emulate.c,
* by Hollis Blanchard <hollisb@us.ibm.com>.
*
* 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.
*/
#include <asm/kvm_ppc.h>
#include <asm/disassemble.h>
#include <asm/kvm_e500.h>
#include "booke.h"
#include "e500_tlb.h"
#define XOP_TLBIVAX 786
#define XOP_TLBSX 914
#define XOP_TLBRE 946
#define XOP_TLBWE 978
int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance)
{
int emulated = EMULATE_DONE;
int ra;
int rb;
switch (get_op(inst)) {
case 31:
switch (get_xop(inst)) {
case XOP_TLBRE:
emulated = kvmppc_e500_emul_tlbre(vcpu);
break;
case XOP_TLBWE:
emulated = kvmppc_e500_emul_tlbwe(vcpu);
break;
case XOP_TLBSX:
rb = get_rb(inst);
emulated = kvmppc_e500_emul_tlbsx(vcpu,rb);
break;
case XOP_TLBIVAX:
ra = get_ra(inst);
rb = get_rb(inst);
emulated = kvmppc_e500_emul_tlbivax(vcpu, ra, rb);
break;
default:
emulated = EMULATE_FAIL;
}
break;
default:
emulated = EMULATE_FAIL;
}
if (emulated == EMULATE_FAIL)
emulated = kvmppc_booke_emulate_op(run, vcpu, inst, advance);
return emulated;
}
int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int emulated = EMULATE_DONE;
ulong spr_val = kvmppc_get_gpr(vcpu, rs);
switch (sprn) {
case SPRN_PID:
vcpu_e500->pid[0] = vcpu->arch.shadow_pid =
vcpu->arch.pid = spr_val;
break;
case SPRN_PID1:
vcpu_e500->pid[1] = spr_val; break;
case SPRN_PID2:
vcpu_e500->pid[2] = spr_val; break;
case SPRN_MAS0:
vcpu_e500->mas0 = spr_val; break;
case SPRN_MAS1:
vcpu_e500->mas1 = spr_val; break;
case SPRN_MAS2:
vcpu_e500->mas2 = spr_val; break;
case SPRN_MAS3:
vcpu_e500->mas3 = spr_val; break;
case SPRN_MAS4:
vcpu_e500->mas4 = spr_val; break;
case SPRN_MAS6:
vcpu_e500->mas6 = spr_val; break;
case SPRN_MAS7:
vcpu_e500->mas7 = spr_val; break;
case SPRN_L1CSR1:
vcpu_e500->l1csr1 = spr_val; break;
case SPRN_HID0:
vcpu_e500->hid0 = spr_val; break;
case SPRN_HID1:
vcpu_e500->hid1 = spr_val; break;
case SPRN_MMUCSR0:
emulated = kvmppc_e500_emul_mt_mmucsr0(vcpu_e500,
spr_val);
break;
/* extra exceptions */
case SPRN_IVOR32:
vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = spr_val;
break;
case SPRN_IVOR33:
vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] = spr_val;
break;
case SPRN_IVOR34:
vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] = spr_val;
break;
case SPRN_IVOR35:
vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = spr_val;
break;
default:
emulated = kvmppc_booke_emulate_mtspr(vcpu, sprn, rs);
}
return emulated;
}
int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int emulated = EMULATE_DONE;
switch (sprn) {
case SPRN_PID:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->pid[0]); break;
case SPRN_PID1:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->pid[1]); break;
case SPRN_PID2:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->pid[2]); break;
case SPRN_MAS0:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas0); break;
case SPRN_MAS1:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas1); break;
case SPRN_MAS2:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas2); break;
case SPRN_MAS3:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas3); break;
case SPRN_MAS4:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas4); break;
case SPRN_MAS6:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas6); break;
case SPRN_MAS7:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->mas7); break;
case SPRN_TLB0CFG:
{
ulong tmp = SPRN_TLB0CFG;
tmp &= ~0xfffUL;
tmp |= vcpu_e500->guest_tlb_size[0];
kvmppc_set_gpr(vcpu, rt, tmp);
break;
}
case SPRN_TLB1CFG:
{
ulong tmp = SPRN_TLB1CFG;
tmp &= ~0xfffUL;
tmp |= vcpu_e500->guest_tlb_size[1];
kvmppc_set_gpr(vcpu, rt, tmp);
break;
}
case SPRN_L1CSR1:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->l1csr1); break;
case SPRN_HID0:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->hid0); break;
case SPRN_HID1:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->hid1); break;
case SPRN_MMUCSR0:
kvmppc_set_gpr(vcpu, rt, 0); break;
case SPRN_MMUCFG:
kvmppc_set_gpr(vcpu, rt, mfspr(SPRN_MMUCFG)); break;
/* extra exceptions */
case SPRN_IVOR32:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL]);
break;
case SPRN_IVOR33:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA]);
break;
case SPRN_IVOR34:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND]);
break;
case SPRN_IVOR35:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR]);
break;
default:
emulated = kvmppc_booke_emulate_mfspr(vcpu, sprn, rt);
}
return emulated;
}
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