[deliverable/linux.git] / arch / powerpc / kvm / e500.c

/*
 * 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.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 <linux/kvm_host.h>
#include <linux/slab.h>
#include <linux/err.h>

#include <asm/reg.h>
#include <asm/cputable.h>
#include <asm/tlbflush.h>
#include <asm/kvm_e500.h>
#include <asm/kvm_ppc.h>

#include "booke.h"
#include "e500_tlb.h"

void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
{
}

void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
{
}

void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	kvmppc_e500_tlb_load(vcpu, cpu);
}

void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
{
	kvmppc_e500_tlb_put(vcpu);
}

int kvmppc_core_check_processor_compat(void)
{
	int r;

	if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
		r = 0;
	else
		r = -ENOTSUPP;

	return r;
}

int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
{
	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);

	kvmppc_e500_tlb_setup(vcpu_e500);

	/* Registers init */
	vcpu->arch.pvr = mfspr(SPRN_PVR);
	vcpu_e500->svr = mfspr(SPRN_SVR);

	/* Since booke kvm only support one core, update all vcpus' PIR to 0 */
	vcpu->vcpu_id = 0;

	return 0;
}

/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
                               struct kvm_translation *tr)
{
	int index;
	gva_t eaddr;
	u8 pid;
	u8 as;

	eaddr = tr->linear_address;
	pid = (tr->linear_address >> 32) & 0xff;
	as = (tr->linear_address >> 40) & 0x1;

	index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
	if (index < 0) {
		tr->valid = 0;
		return 0;
	}

	tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
	/* XXX what does "writeable" and "usermode" even mean? */
	tr->valid = 1;

	return 0;
}

void kvmppc_core_get_sregs(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_SPE |
	                       KVM_SREGS_E_PM;
	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;

	sregs->u.e.mas0 = vcpu_e500->mas0;
	sregs->u.e.mas1 = vcpu_e500->mas1;
	sregs->u.e.mas2 = vcpu_e500->mas2;
	sregs->u.e.mas7_3 = ((u64)vcpu_e500->mas7 << 32) | vcpu_e500->mas3;
	sregs->u.e.mas4 = vcpu_e500->mas4;
	sregs->u.e.mas6 = vcpu_e500->mas6;

	sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
	sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
	sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg;
	sregs->u.e.tlbcfg[2] = 0;
	sregs->u.e.tlbcfg[3] = 0;

	sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
	sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
	sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
	sregs->u.e.ivor_high[3] =
		vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];

	kvmppc_get_sregs_ivor(vcpu, sregs);
}

int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);

	if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
		vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
		vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
		vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
	}

	if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
		vcpu_e500->mas0 = sregs->u.e.mas0;
		vcpu_e500->mas1 = sregs->u.e.mas1;
		vcpu_e500->mas2 = sregs->u.e.mas2;
		vcpu_e500->mas7 = sregs->u.e.mas7_3 >> 32;
		vcpu_e500->mas3 = (u32)sregs->u.e.mas7_3;
		vcpu_e500->mas4 = sregs->u.e.mas4;
		vcpu_e500->mas6 = sregs->u.e.mas6;
	}

	if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
		return 0;

	if (sregs->u.e.features & KVM_SREGS_E_SPE) {
		vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] =
			sregs->u.e.ivor_high[0];
		vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] =
			sregs->u.e.ivor_high[1];
		vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] =
			sregs->u.e.ivor_high[2];
	}

	if (sregs->u.e.features & KVM_SREGS_E_PM) {
		vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
			sregs->u.e.ivor_high[3];
	}

	return kvmppc_set_sregs_ivor(vcpu, sregs);
}

struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
{
	struct kvmppc_vcpu_e500 *vcpu_e500;
	struct kvm_vcpu *vcpu;
	int err;

	vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
	if (!vcpu_e500) {
		err = -ENOMEM;
		goto out;
	}

	vcpu = &vcpu_e500->vcpu;
	err = kvm_vcpu_init(vcpu, kvm, id);
	if (err)
		goto free_vcpu;

	err = kvmppc_e500_tlb_init(vcpu_e500);
	if (err)
		goto uninit_vcpu;

	vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
	if (!vcpu->arch.shared)
		goto uninit_tlb;

	return vcpu;

uninit_tlb:
	kvmppc_e500_tlb_uninit(vcpu_e500);
uninit_vcpu:
	kvm_vcpu_uninit(vcpu);
free_vcpu:
	kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
out:
	return ERR_PTR(err);
}

void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
{
	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);

	free_page((unsigned long)vcpu->arch.shared);
	kvm_vcpu_uninit(vcpu);
	kvmppc_e500_tlb_uninit(vcpu_e500);
	kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
}

static int __init kvmppc_e500_init(void)
{
	int r, i;
	unsigned long ivor[3];
	unsigned long max_ivor = 0;

	r = kvmppc_booke_init();
	if (r)
		return r;

	/* copy extra E500 exception handlers */
	ivor[0] = mfspr(SPRN_IVOR32);
	ivor[1] = mfspr(SPRN_IVOR33);
	ivor[2] = mfspr(SPRN_IVOR34);
	for (i = 0; i < 3; i++) {
		if (ivor[i] > max_ivor)
			max_ivor = ivor[i];

		memcpy((void *)kvmppc_booke_handlers + ivor[i],
		       kvmppc_handlers_start + (i + 16) * kvmppc_handler_len,
		       kvmppc_handler_len);
	}
	flush_icache_range(kvmppc_booke_handlers,
			kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);

	return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
}

static void __exit kvmppc_e500_exit(void)
{
	kvmppc_booke_exit();
}

module_init(kvmppc_e500_init);
module_exit(kvmppc_e500_exit);
Commit	Line	Data
bc8080cb HB	1	/*
	2	* Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
	3	*
	4	* Author: Yu Liu, <yu.liu@freescale.com>
	5	*
	6	* Description:
	7	* This file is derived from arch/powerpc/kvm/44x.c,
	8	* by Hollis Blanchard <hollisb@us.ibm.com>.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License, version 2, as
	12	* published by the Free Software Foundation.
	13	*/
	14
	15	#include <linux/kvm_host.h>
5a0e3ad6	16	#include <linux/slab.h>
bc8080cb HB	17	#include <linux/err.h>
	18
	19	#include <asm/reg.h>
	20	#include <asm/cputable.h>
	21	#include <asm/tlbflush.h>
	22	#include <asm/kvm_e500.h>
	23	#include <asm/kvm_ppc.h>
	24
bb3a8a17	25	#include "booke.h"
bc8080cb HB	26	#include "e500_tlb.h"
	27
	28	void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
	29	{
	30	}
	31
	32	void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
	33	{
	34	}
	35
	36	void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	37	{
	38	kvmppc_e500_tlb_load(vcpu, cpu);
	39	}
	40
	41	void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
	42	{
	43	kvmppc_e500_tlb_put(vcpu);
	44	}
	45
	46	int kvmppc_core_check_processor_compat(void)
	47	{
	48	int r;
	49
	50	if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
	51	r = 0;
	52	else
	53	r = -ENOTSUPP;
	54
	55	return r;
	56	}
	57
	58	int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
	59	{
	60	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
	61
	62	kvmppc_e500_tlb_setup(vcpu_e500);
	63
a9040f27 LY	64	/* Registers init */
a9040f27 LY	65	vcpu->arch.pvr = mfspr(SPRN_PVR);
90d34b0e	66	vcpu_e500->svr = mfspr(SPRN_SVR);
a9040f27 LY	67
	68	/* Since booke kvm only support one core, update all vcpus' PIR to 0 */
	69	vcpu->vcpu_id = 0;
	70
bc8080cb HB	71	return 0;
	72	}
	73
	74	/* 'linear_address' is actually an encoding of AS\|PID\|EADDR . */
	75	int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
	76	struct kvm_translation *tr)
	77	{
	78	int index;
	79	gva_t eaddr;
	80	u8 pid;
	81	u8 as;
	82
	83	eaddr = tr->linear_address;
	84	pid = (tr->linear_address >> 32) & 0xff;
	85	as = (tr->linear_address >> 40) & 0x1;
	86
	87	index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
	88	if (index < 0) {
	89	tr->valid = 0;
	90	return 0;
	91	}
	92
	93	tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
	94	/* XXX what does "writeable" and "usermode" even mean? */
	95	tr->valid = 1;
	96
	97	return 0;
	98	}
	99
5ce941ee SW	100	void kvmppc_core_get_sregs(struct kvm_vcpu vcpu, struct kvm_sregs sregs)
	101	{
	102	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
	103
	104	sregs->u.e.features \|= KVM_SREGS_E_ARCH206_MMU \| KVM_SREGS_E_SPE \|
	105	KVM_SREGS_E_PM;
	106	sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
	107
	108	sregs->u.e.impl.fsl.features = 0;
	109	sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
	110	sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
	111	sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
	112
	113	sregs->u.e.mas0 = vcpu_e500->mas0;
	114	sregs->u.e.mas1 = vcpu_e500->mas1;
	115	sregs->u.e.mas2 = vcpu_e500->mas2;
	116	sregs->u.e.mas7_3 = ((u64)vcpu_e500->mas7 << 32) \| vcpu_e500->mas3;
	117	sregs->u.e.mas4 = vcpu_e500->mas4;
	118	sregs->u.e.mas6 = vcpu_e500->mas6;
	119
	120	sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
	121	sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
	122	sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg;
	123	sregs->u.e.tlbcfg[2] = 0;
	124	sregs->u.e.tlbcfg[3] = 0;
	125
	126	sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
	127	sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
	128	sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
	129	sregs->u.e.ivor_high[3] =
	130	vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
	131
	132	kvmppc_get_sregs_ivor(vcpu, sregs);
	133	}
	134
	135	int kvmppc_core_set_sregs(struct kvm_vcpu vcpu, struct kvm_sregs sregs)
	136	{
	137	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
	138
	139	if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
	140	vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
	141	vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
	142	vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
	143	}
	144
	145	if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
	146	vcpu_e500->mas0 = sregs->u.e.mas0;
	147	vcpu_e500->mas1 = sregs->u.e.mas1;
	148	vcpu_e500->mas2 = sregs->u.e.mas2;
	149	vcpu_e500->mas7 = sregs->u.e.mas7_3 >> 32;
	150	vcpu_e500->mas3 = (u32)sregs->u.e.mas7_3;
	151	vcpu_e500->mas4 = sregs->u.e.mas4;
	152	vcpu_e500->mas6 = sregs->u.e.mas6;
	153	}
	154
	155	if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
	156	return 0;
	157
	158	if (sregs->u.e.features & KVM_SREGS_E_SPE) {
	159	vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] =
	160	sregs->u.e.ivor_high[0];
	161	vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] =
	162	sregs->u.e.ivor_high[1];
	163	vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] =
164	sregs->u.e.ivor_high[2];
165	}
166
167	if (sregs->u.e.features & KVM_SREGS_E_PM) {
168	vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
169	sregs->u.e.ivor_high[3];
170	}
171
172	return kvmppc_set_sregs_ivor(vcpu, sregs);
173	}
174
bc8080cb HB	175	struct kvm_vcpu kvmppc_core_vcpu_create(struct kvm kvm, unsigned int id)
	176	{
	177	struct kvmppc_vcpu_e500 *vcpu_e500;
	178	struct kvm_vcpu *vcpu;
	179	int err;
	180
	181	vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
	182	if (!vcpu_e500) {
	183	err = -ENOMEM;
	184	goto out;
	185	}
	186
	187	vcpu = &vcpu_e500->vcpu;
	188	err = kvm_vcpu_init(vcpu, kvm, id);
	189	if (err)
	190	goto free_vcpu;
	191
	192	err = kvmppc_e500_tlb_init(vcpu_e500);
	193	if (err)
	194	goto uninit_vcpu;
	195
96bc451a AG	196	vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL\|__GFP_ZERO);
	197	if (!vcpu->arch.shared)
	198	goto uninit_tlb;
	199
bc8080cb HB	200	return vcpu;
bc8080cb HB	201
96bc451a AG	202	uninit_tlb:
96bc451a AG	203	kvmppc_e500_tlb_uninit(vcpu_e500);
bc8080cb HB	204	uninit_vcpu:
	205	kvm_vcpu_uninit(vcpu);
	206	free_vcpu:
	207	kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
	208	out:
	209	return ERR_PTR(err);
	210	}
	211
	212	void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
	213	{
	214	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
	215
96bc451a	216	free_page((unsigned long)vcpu->arch.shared);
bc8080cb	217	kvm_vcpu_uninit(vcpu);
f22e2f04	218	kvmppc_e500_tlb_uninit(vcpu_e500);
bc8080cb HB	219	kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
	220	}
	221
2986b8c7	222	static int __init kvmppc_e500_init(void)
bc8080cb	223	{
bb3a8a17 HB	224	int r, i;
	225	unsigned long ivor[3];
	226	unsigned long max_ivor = 0;
bc8080cb HB	227
	228	r = kvmppc_booke_init();
	229	if (r)
	230	return r;
	231
bb3a8a17 HB	232	/* copy extra E500 exception handlers */
	233	ivor[0] = mfspr(SPRN_IVOR32);
	234	ivor[1] = mfspr(SPRN_IVOR33);
	235	ivor[2] = mfspr(SPRN_IVOR34);
	236	for (i = 0; i < 3; i++) {
	237	if (ivor[i] > max_ivor)
	238	max_ivor = ivor[i];
	239
	240	memcpy((void *)kvmppc_booke_handlers + ivor[i],
	241	kvmppc_handlers_start + (i + 16) * kvmppc_handler_len,
	242	kvmppc_handler_len);
	243	}
	244	flush_icache_range(kvmppc_booke_handlers,
	245	kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
	246
0ee75bea	247	return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
bc8080cb HB	248	}
bc8080cb HB	249
a06cdb56	250	static void __exit kvmppc_e500_exit(void)
bc8080cb HB	251	{
	252	kvmppc_booke_exit();
	253	}
	254
	255	module_init(kvmppc_e500_init);
	256	module_exit(kvmppc_e500_exit);