diff options
Diffstat (limited to 'arch/powerpc/kvm/e500_emulate.c')
| -rw-r--r-- | arch/powerpc/kvm/e500_emulate.c | 452 |
1 files changed, 452 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c new file mode 100644 index 000000000..051102d50 --- /dev/null +++ b/arch/powerpc/kvm/e500_emulate.c @@ -0,0 +1,452 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2008-2011 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>. + */ + +#include <asm/kvm_ppc.h> +#include <asm/disassemble.h> +#include <asm/dbell.h> +#include <asm/reg_booke.h> + +#include "booke.h" +#include "e500.h" + +#define XOP_DCBTLS 166 +#define XOP_MSGSND 206 +#define XOP_MSGCLR 238 +#define XOP_MFTMR 366 +#define XOP_TLBIVAX 786 +#define XOP_TLBSX 914 +#define XOP_TLBRE 946 +#define XOP_TLBWE 978 +#define XOP_TLBILX 18 +#define XOP_EHPRIV 270 + +#ifdef CONFIG_KVM_E500MC +static int dbell2prio(ulong param) +{ + int msg = param & PPC_DBELL_TYPE_MASK; + int prio = -1; + + switch (msg) { + case PPC_DBELL_TYPE(PPC_DBELL): + prio = BOOKE_IRQPRIO_DBELL; + break; + case PPC_DBELL_TYPE(PPC_DBELL_CRIT): + prio = BOOKE_IRQPRIO_DBELL_CRIT; + break; + default: + break; + } + + return prio; +} + +static int kvmppc_e500_emul_msgclr(struct kvm_vcpu *vcpu, int rb) +{ + ulong param = vcpu->arch.regs.gpr[rb]; + int prio = dbell2prio(param); + + if (prio < 0) + return EMULATE_FAIL; + + clear_bit(prio, &vcpu->arch.pending_exceptions); + return EMULATE_DONE; +} + +static int kvmppc_e500_emul_msgsnd(struct kvm_vcpu *vcpu, int rb) +{ + ulong param = vcpu->arch.regs.gpr[rb]; + int prio = dbell2prio(rb); + int pir = param & PPC_DBELL_PIR_MASK; + unsigned long i; + struct kvm_vcpu *cvcpu; + + if (prio < 0) + return EMULATE_FAIL; + + kvm_for_each_vcpu(i, cvcpu, vcpu->kvm) { + int cpir = cvcpu->arch.shared->pir; + if ((param & PPC_DBELL_MSG_BRDCAST) || (cpir == pir)) { + set_bit(prio, &cvcpu->arch.pending_exceptions); + kvm_vcpu_kick(cvcpu); + } + } + + return EMULATE_DONE; +} +#endif + +static int kvmppc_e500_emul_ehpriv(struct kvm_vcpu *vcpu, + unsigned int inst, int *advance) +{ + int emulated = EMULATE_DONE; + + switch (get_oc(inst)) { + case EHPRIV_OC_DEBUG: + vcpu->run->exit_reason = KVM_EXIT_DEBUG; + vcpu->run->debug.arch.address = vcpu->arch.regs.nip; + vcpu->run->debug.arch.status = 0; + kvmppc_account_exit(vcpu, DEBUG_EXITS); + emulated = EMULATE_EXIT_USER; + *advance = 0; + break; + default: + emulated = EMULATE_FAIL; + } + return emulated; +} + +static int kvmppc_e500_emul_dcbtls(struct kvm_vcpu *vcpu) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + + /* Always fail to lock the cache */ + vcpu_e500->l1csr0 |= L1CSR0_CUL; + return EMULATE_DONE; +} + +static int kvmppc_e500_emul_mftmr(struct kvm_vcpu *vcpu, unsigned int inst, + int rt) +{ + /* Expose one thread per vcpu */ + if (get_tmrn(inst) == TMRN_TMCFG0) { + kvmppc_set_gpr(vcpu, rt, + 1 | (1 << TMRN_TMCFG0_NATHRD_SHIFT)); + return EMULATE_DONE; + } + + return EMULATE_FAIL; +} + +int kvmppc_core_emulate_op_e500(struct kvm_vcpu *vcpu, + unsigned int inst, int *advance) +{ + int emulated = EMULATE_DONE; + int ra = get_ra(inst); + int rb = get_rb(inst); + int rt = get_rt(inst); + gva_t ea; + + switch (get_op(inst)) { + case 31: + switch (get_xop(inst)) { + + case XOP_DCBTLS: + emulated = kvmppc_e500_emul_dcbtls(vcpu); + break; + +#ifdef CONFIG_KVM_E500MC + case XOP_MSGSND: + emulated = kvmppc_e500_emul_msgsnd(vcpu, rb); + break; + + case XOP_MSGCLR: + emulated = kvmppc_e500_emul_msgclr(vcpu, rb); + break; +#endif + + case XOP_TLBRE: + emulated = kvmppc_e500_emul_tlbre(vcpu); + break; + + case XOP_TLBWE: + emulated = kvmppc_e500_emul_tlbwe(vcpu); + break; + + case XOP_TLBSX: + ea = kvmppc_get_ea_indexed(vcpu, ra, rb); + emulated = kvmppc_e500_emul_tlbsx(vcpu, ea); + break; + + case XOP_TLBILX: { + int type = rt & 0x3; + ea = kvmppc_get_ea_indexed(vcpu, ra, rb); + emulated = kvmppc_e500_emul_tlbilx(vcpu, type, ea); + break; + } + + case XOP_TLBIVAX: + ea = kvmppc_get_ea_indexed(vcpu, ra, rb); + emulated = kvmppc_e500_emul_tlbivax(vcpu, ea); + break; + + case XOP_MFTMR: + emulated = kvmppc_e500_emul_mftmr(vcpu, inst, rt); + break; + + case XOP_EHPRIV: + emulated = kvmppc_e500_emul_ehpriv(vcpu, inst, advance); + break; + + default: + emulated = EMULATE_FAIL; + } + + break; + + default: + emulated = EMULATE_FAIL; + } + + if (emulated == EMULATE_FAIL) + emulated = kvmppc_booke_emulate_op(vcpu, inst, advance); + + return emulated; +} + +int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int emulated = EMULATE_DONE; + + switch (sprn) { +#ifndef CONFIG_KVM_BOOKE_HV + case SPRN_PID: + kvmppc_set_pid(vcpu, spr_val); + break; + case SPRN_PID1: + if (spr_val != 0) + return EMULATE_FAIL; + vcpu_e500->pid[1] = spr_val; + break; + case SPRN_PID2: + if (spr_val != 0) + return EMULATE_FAIL; + vcpu_e500->pid[2] = spr_val; + break; + case SPRN_MAS0: + vcpu->arch.shared->mas0 = spr_val; + break; + case SPRN_MAS1: + vcpu->arch.shared->mas1 = spr_val; + break; + case SPRN_MAS2: + vcpu->arch.shared->mas2 = spr_val; + break; + case SPRN_MAS3: + vcpu->arch.shared->mas7_3 &= ~(u64)0xffffffff; + vcpu->arch.shared->mas7_3 |= spr_val; + break; + case SPRN_MAS4: + vcpu->arch.shared->mas4 = spr_val; + break; + case SPRN_MAS6: + vcpu->arch.shared->mas6 = spr_val; + break; + case SPRN_MAS7: + vcpu->arch.shared->mas7_3 &= (u64)0xffffffff; + vcpu->arch.shared->mas7_3 |= (u64)spr_val << 32; + break; +#endif + case SPRN_L1CSR0: + vcpu_e500->l1csr0 = spr_val; + vcpu_e500->l1csr0 &= ~(L1CSR0_DCFI | L1CSR0_CLFC); + break; + case SPRN_L1CSR1: + vcpu_e500->l1csr1 = spr_val; + vcpu_e500->l1csr1 &= ~(L1CSR1_ICFI | L1CSR1_ICLFR); + 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; + + case SPRN_PWRMGTCR0: + /* + * Guest relies on host power management configurations + * Treat the request as a general store + */ + vcpu->arch.pwrmgtcr0 = spr_val; + break; + + case SPRN_BUCSR: + /* + * If we are here, it means that we have already flushed the + * branch predictor, so just return to guest. + */ + break; + + /* extra exceptions */ +#ifdef CONFIG_SPE_POSSIBLE + 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; +#endif +#ifdef CONFIG_ALTIVEC + case SPRN_IVOR32: + vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_UNAVAIL] = spr_val; + break; + case SPRN_IVOR33: + vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_ASSIST] = spr_val; + break; +#endif + case SPRN_IVOR35: + vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = spr_val; + break; +#ifdef CONFIG_KVM_BOOKE_HV + case SPRN_IVOR36: + vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = spr_val; + break; + case SPRN_IVOR37: + vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = spr_val; + break; +#endif + default: + emulated = kvmppc_booke_emulate_mtspr(vcpu, sprn, spr_val); + } + + return emulated; +} + +int kvmppc_core_emulate_mfspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int emulated = EMULATE_DONE; + + switch (sprn) { +#ifndef CONFIG_KVM_BOOKE_HV + case SPRN_PID: + *spr_val = vcpu_e500->pid[0]; + break; + case SPRN_PID1: + *spr_val = vcpu_e500->pid[1]; + break; + case SPRN_PID2: + *spr_val = vcpu_e500->pid[2]; + break; + case SPRN_MAS0: + *spr_val = vcpu->arch.shared->mas0; + break; + case SPRN_MAS1: + *spr_val = vcpu->arch.shared->mas1; + break; + case SPRN_MAS2: + *spr_val = vcpu->arch.shared->mas2; + break; + case SPRN_MAS3: + *spr_val = (u32)vcpu->arch.shared->mas7_3; + break; + case SPRN_MAS4: + *spr_val = vcpu->arch.shared->mas4; + break; + case SPRN_MAS6: + *spr_val = vcpu->arch.shared->mas6; + break; + case SPRN_MAS7: + *spr_val = vcpu->arch.shared->mas7_3 >> 32; + break; +#endif + case SPRN_DECAR: + *spr_val = vcpu->arch.decar; + break; + case SPRN_TLB0CFG: + *spr_val = vcpu->arch.tlbcfg[0]; + break; + case SPRN_TLB1CFG: + *spr_val = vcpu->arch.tlbcfg[1]; + break; + case SPRN_TLB0PS: + if (!has_feature(vcpu, VCPU_FTR_MMU_V2)) + return EMULATE_FAIL; + *spr_val = vcpu->arch.tlbps[0]; + break; + case SPRN_TLB1PS: + if (!has_feature(vcpu, VCPU_FTR_MMU_V2)) + return EMULATE_FAIL; + *spr_val = vcpu->arch.tlbps[1]; + break; + case SPRN_L1CSR0: + *spr_val = vcpu_e500->l1csr0; + break; + case SPRN_L1CSR1: + *spr_val = vcpu_e500->l1csr1; + break; + case SPRN_HID0: + *spr_val = vcpu_e500->hid0; + break; + case SPRN_HID1: + *spr_val = vcpu_e500->hid1; + break; + case SPRN_SVR: + *spr_val = vcpu_e500->svr; + break; + + case SPRN_MMUCSR0: + *spr_val = 0; + break; + + case SPRN_MMUCFG: + *spr_val = vcpu->arch.mmucfg; + break; + case SPRN_EPTCFG: + if (!has_feature(vcpu, VCPU_FTR_MMU_V2)) + return EMULATE_FAIL; + /* + * Legacy Linux guests access EPTCFG register even if the E.PT + * category is disabled in the VM. Give them a chance to live. + */ + *spr_val = vcpu->arch.eptcfg; + break; + + case SPRN_PWRMGTCR0: + *spr_val = vcpu->arch.pwrmgtcr0; + break; + + /* extra exceptions */ +#ifdef CONFIG_SPE_POSSIBLE + case SPRN_IVOR32: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL]; + break; + case SPRN_IVOR33: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA]; + break; + case SPRN_IVOR34: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND]; + break; +#endif +#ifdef CONFIG_ALTIVEC + case SPRN_IVOR32: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_UNAVAIL]; + break; + case SPRN_IVOR33: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_ASSIST]; + break; +#endif + case SPRN_IVOR35: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR]; + break; +#ifdef CONFIG_KVM_BOOKE_HV + case SPRN_IVOR36: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL]; + break; + case SPRN_IVOR37: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT]; + break; +#endif + default: + emulated = kvmppc_booke_emulate_mfspr(vcpu, sprn, spr_val); + } + + return emulated; +} + |