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/*
* Copyright (C) 2010,2012 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: Varun Sethi, <varun.sethi@freescale.com>
*
* Description:
* This file is derived from arch/powerpc/kvm/e500.c,
* by Yu Liu <yu.liu@freescale.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 <linux/kvm_host.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <asm/reg.h>
#include <asm/cputable.h>
#include <asm/tlbflush.h>
#include <asm/kvm_ppc.h>
#include <asm/dbell.h>
#include "booke.h"
#include "e500.h"
void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type)
{
enum ppc_dbell dbell_type;
unsigned long tag;
switch (type) {
case INT_CLASS_NONCRIT:
dbell_type = PPC_G_DBELL;
break;
case INT_CLASS_CRIT:
dbell_type = PPC_G_DBELL_CRIT;
break;
case INT_CLASS_MC:
dbell_type = PPC_G_DBELL_MC;
break;
default:
WARN_ONCE(1, "%s: unknown int type %d\n", __func__, type);
return;
}
preempt_disable();
tag = PPC_DBELL_LPID(get_lpid(vcpu)) | vcpu->vcpu_id;
mb();
ppc_msgsnd(dbell_type, 0, tag);
preempt_enable();
}
/* gtlbe must not be mapped by more than one host tlb entry */
void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
struct kvm_book3e_206_tlb_entry *gtlbe)
{
unsigned int tid, ts;
gva_t eaddr;
u32 val;
unsigned long flags;
ts = get_tlb_ts(gtlbe);
tid = get_tlb_tid(gtlbe);
/* We search the host TLB to invalidate its shadow TLB entry */
val = (tid << 16) | ts;
eaddr = get_tlb_eaddr(gtlbe);
local_irq_save(flags);
mtspr(SPRN_MAS6, val);
mtspr(SPRN_MAS5, MAS5_SGS | get_lpid(&vcpu_e500->vcpu));
asm volatile("tlbsx 0, %[eaddr]\n" : : [eaddr] "r" (eaddr));
val = mfspr(SPRN_MAS1);
if (val & MAS1_VALID) {
mtspr(SPRN_MAS1, val & ~MAS1_VALID);
asm volatile("tlbwe");
}
mtspr(SPRN_MAS5, 0);
/* NOTE: tlbsx also updates mas8, so clear it for host tlbwe */
mtspr(SPRN_MAS8, 0);
isync();
local_irq_restore(flags);
}
void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500)
{
unsigned long flags;
local_irq_save(flags);
mtspr(SPRN_MAS5, MAS5_SGS | get_lpid(&vcpu_e500->vcpu));
asm volatile("tlbilxlpid");
mtspr(SPRN_MAS5, 0);
local_irq_restore(flags);
}
void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid)
{
vcpu->arch.pid = pid;
}
void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr)
{
}
/* We use two lpids per VM */
static DEFINE_PER_CPU(struct kvm_vcpu *[KVMPPC_NR_LPIDS], last_vcpu_of_lpid);
static void kvmppc_core_vcpu_load_e500mc(struct kvm_vcpu *vcpu, int cpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
kvmppc_booke_vcpu_load(vcpu, cpu);
mtspr(SPRN_LPID, get_lpid(vcpu));
mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr);
mtspr(SPRN_GPIR, vcpu->vcpu_id);
mtspr(SPRN_MSRP, vcpu->arch.shadow_msrp);
vcpu->arch.eplc = EPC_EGS | (get_lpid(vcpu) << EPC_ELPID_SHIFT);
vcpu->arch.epsc = vcpu->arch.eplc;
mtspr(SPRN_EPLC, vcpu->arch.eplc);
mtspr(SPRN_EPSC, vcpu->arch.epsc);
mtspr(SPRN_GIVPR, vcpu->arch.ivpr);
mtspr(SPRN_GIVOR2, vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]);
mtspr(SPRN_GIVOR8, vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]);
mtspr(SPRN_GSPRG0, (unsigned long)vcpu->arch.shared->sprg0);
mtspr(SPRN_GSPRG1, (unsigned long)vcpu->arch.shared->sprg1);
mtspr(SPRN_GSPRG2, (unsigned long)vcpu->arch.shared->sprg2);
mtspr(SPRN_GSPRG3, (unsigned long)vcpu->arch.shared->sprg3);
mtspr(SPRN_GSRR0, vcpu->arch.shared->srr0);
mtspr(SPRN_GSRR1, vcpu->arch.shared->srr1);
mtspr(SPRN_GEPR, vcpu->arch.epr);
mtspr(SPRN_GDEAR, vcpu->arch.shared->dar);
mtspr(SPRN_GESR, vcpu->arch.shared->esr);
if (vcpu->arch.oldpir != mfspr(SPRN_PIR) ||
__this_cpu_read(last_vcpu_of_lpid[get_lpid(vcpu)]) != vcpu) {
kvmppc_e500_tlbil_all(vcpu_e500);
__this_cpu_write(last_vcpu_of_lpid[get_lpid(vcpu)], vcpu);
}
}
static void kvmppc_core_vcpu_put_e500mc(struct kvm_vcpu *vcpu)
{
vcpu->arch.eplc = mfspr(SPRN_EPLC);
vcpu->arch.epsc = mfspr(SPRN_EPSC);
vcpu->arch.shared->sprg0 = mfspr(SPRN_GSPRG0);
vcpu->arch.shared->sprg1 = mfspr(SPRN_GSPRG1);
vcpu->arch.shared->sprg2 = mfspr(SPRN_GSPRG2);
vcpu->arch.shared->sprg3 = mfspr(SPRN_GSPRG3);
vcpu->arch.shared->srr0 = mfspr(SPRN_GSRR0);
vcpu->arch.shared->srr1 = mfspr(SPRN_GSRR1);
vcpu->arch.epr = mfspr(SPRN_GEPR);
vcpu->arch.shared->dar = mfspr(SPRN_GDEAR);
vcpu->arch.shared->esr = mfspr(SPRN_GESR);
vcpu->arch.oldpir = mfspr(SPRN_PIR);
kvmppc_booke_vcpu_put(vcpu);
}
int kvmppc_core_check_processor_compat(void)
{
int r;
if (strcmp(cur_cpu_spec->cpu_name, "e500mc") == 0)
r = 0;
else if (strcmp(cur_cpu_spec->cpu_name, "e5500") == 0)
r = 0;
#ifdef CONFIG_ALTIVEC
/*
* Since guests have the priviledge to enable AltiVec, we need AltiVec
* support in the host to save/restore their context.
* Don't use CPU_FTR_ALTIVEC to identify cores with AltiVec unit
* because it's cleared in the absence of CONFIG_ALTIVEC!
*/
else if (strcmp(cur_cpu_spec->cpu_name, "e6500") == 0)
r = 0;
#endif
else
r = -ENOTSUPP;
return r;
}
int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
vcpu->arch.shadow_epcr = SPRN_EPCR_DSIGS | SPRN_EPCR_DGTMI | \
SPRN_EPCR_DUVD;
#ifdef CONFIG_64BIT
vcpu->arch.shadow_epcr |= SPRN_EPCR_ICM;
#endif
vcpu->arch.shadow_msrp = MSRP_UCLEP | MSRP_PMMP;
vcpu->arch.pvr = mfspr(SPRN_PVR);
vcpu_e500->svr = mfspr(SPRN_SVR);
vcpu->arch.cpu_type = KVM_CPU_E500MC;
return 0;
}
static int kvmppc_core_get_sregs_e500mc(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM |
KVM_SREGS_E_PC;
sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
sregs->u.e.impl.fsl.features = 0;
sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
kvmppc_get_sregs_e500_tlb(vcpu, sregs);
sregs->u.e.ivor_high[3] =
vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
sreg
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