[mirror_ubuntu-artful-kernel.git] / arch / powerpc / kvm / booke.h

/*
 * 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>
 */

#ifndef __KVM_BOOKE_H__
#define __KVM_BOOKE_H__

#include <linux/types.h>
#include <linux/kvm_host.h>
#include <asm/kvm_ppc.h>
#include <asm/switch_to.h>
#include "timing.h"

/* interrupt priortity ordering */
#define BOOKE_IRQPRIO_DATA_STORAGE 0
#define BOOKE_IRQPRIO_INST_STORAGE 1
#define BOOKE_IRQPRIO_ALIGNMENT 2
#define BOOKE_IRQPRIO_PROGRAM 3
#define BOOKE_IRQPRIO_FP_UNAVAIL 4
#define BOOKE_IRQPRIO_SPE_UNAVAIL 5
#define BOOKE_IRQPRIO_SPE_FP_DATA 6
#define BOOKE_IRQPRIO_SPE_FP_ROUND 7
#define BOOKE_IRQPRIO_SYSCALL 8
#define BOOKE_IRQPRIO_AP_UNAVAIL 9
#define BOOKE_IRQPRIO_DTLB_MISS 10
#define BOOKE_IRQPRIO_ITLB_MISS 11
#define BOOKE_IRQPRIO_MACHINE_CHECK 12
#define BOOKE_IRQPRIO_DEBUG 13
#define BOOKE_IRQPRIO_CRITICAL 14
#define BOOKE_IRQPRIO_WATCHDOG 15
#define BOOKE_IRQPRIO_EXTERNAL 16
#define BOOKE_IRQPRIO_FIT 17
#define BOOKE_IRQPRIO_DECREMENTER 18
#define BOOKE_IRQPRIO_PERFORMANCE_MONITOR 19
/* Internal pseudo-irqprio for level triggered externals */
#define BOOKE_IRQPRIO_EXTERNAL_LEVEL 20
#define BOOKE_IRQPRIO_DBELL 21
#define BOOKE_IRQPRIO_DBELL_CRIT 22
#define BOOKE_IRQPRIO_MAX 23

#define BOOKE_IRQMASK_EE ((1 << BOOKE_IRQPRIO_EXTERNAL_LEVEL) | \
			  (1 << BOOKE_IRQPRIO_PERFORMANCE_MONITOR) | \
			  (1 << BOOKE_IRQPRIO_DBELL) | \
			  (1 << BOOKE_IRQPRIO_DECREMENTER) | \
			  (1 << BOOKE_IRQPRIO_FIT) | \
			  (1 << BOOKE_IRQPRIO_EXTERNAL))

#define BOOKE_IRQMASK_CE ((1 << BOOKE_IRQPRIO_DBELL_CRIT) | \
			  (1 << BOOKE_IRQPRIO_WATCHDOG) | \
			  (1 << BOOKE_IRQPRIO_CRITICAL))

extern unsigned long kvmppc_booke_handlers;
extern unsigned long kvmppc_booke_handler_addr[];

void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr);
void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr);

void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr);
void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr);
void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);

int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
                            unsigned int inst, int *advance);
int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);

/* low-level asm code to transfer guest state */
void kvmppc_load_guest_spe(struct kvm_vcpu *vcpu);
void kvmppc_save_guest_spe(struct kvm_vcpu *vcpu);

/* high-level function, manages flags, host state */
void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu);

void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu);

enum int_class {
	INT_CLASS_NONCRIT,
	INT_CLASS_CRIT,
	INT_CLASS_MC,
	INT_CLASS_DBG,
};

void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type);

/*
 * Load up guest vcpu FP state if it's needed.
 * It also set the MSR_FP in thread so that host know
 * we're holding FPU, and then host can help to save
 * guest vcpu FP state if other threads require to use FPU.
 * This simulates an FP unavailable fault.
 *
 * It requires to be called with preemption disabled.
 */
static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
{
#ifdef CONFIG_PPC_FPU
	if (vcpu->fpu_active && !(current->thread.regs->msr & MSR_FP)) {
		load_up_fpu();
		current->thread.regs->msr |= MSR_FP;
	}
#endif
}

/*
 * Save guest vcpu FP state into thread.
 * It requires to be called with preemption disabled.
 */
static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
{
#ifdef CONFIG_PPC_FPU
	if (vcpu->fpu_active && (current->thread.regs->msr & MSR_FP))
		giveup_fpu(current);
#endif
}
#endif /* __KVM_BOOKE_H__ */
Commit	Line	Data
75f74f0d HB	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License, version 2, as
	4	* published by the Free Software Foundation.
	5	*
	6	* This program is distributed in the hope that it will be useful,
	7	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	8	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	9	* GNU General Public License for more details.
	10	*
	11	* You should have received a copy of the GNU General Public License
	12	* along with this program; if not, write to the Free Software
	13	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	14	*
	15	* Copyright IBM Corp. 2008
	16	*
	17	* Authors: Hollis Blanchard <hollisb@us.ibm.com>
	18	*/
	19
	20	#ifndef __KVM_BOOKE_H__
	21	#define __KVM_BOOKE_H__
	22
	23	#include <linux/types.h>
	24	#include <linux/kvm_host.h>
d0c7dc03	25	#include <asm/kvm_ppc.h>
8fae845f	26	#include <asm/switch_to.h>
73e75b41	27	#include "timing.h"
75f74f0d	28
d4cf3892 HB	29	/* interrupt priortity ordering */
	30	#define BOOKE_IRQPRIO_DATA_STORAGE 0
	31	#define BOOKE_IRQPRIO_INST_STORAGE 1
	32	#define BOOKE_IRQPRIO_ALIGNMENT 2
	33	#define BOOKE_IRQPRIO_PROGRAM 3
	34	#define BOOKE_IRQPRIO_FP_UNAVAIL 4
bb3a8a17 HB	35	#define BOOKE_IRQPRIO_SPE_UNAVAIL 5
	36	#define BOOKE_IRQPRIO_SPE_FP_DATA 6
	37	#define BOOKE_IRQPRIO_SPE_FP_ROUND 7
	38	#define BOOKE_IRQPRIO_SYSCALL 8
	39	#define BOOKE_IRQPRIO_AP_UNAVAIL 9
	40	#define BOOKE_IRQPRIO_DTLB_MISS 10
	41	#define BOOKE_IRQPRIO_ITLB_MISS 11
	42	#define BOOKE_IRQPRIO_MACHINE_CHECK 12
	43	#define BOOKE_IRQPRIO_DEBUG 13
	44	#define BOOKE_IRQPRIO_CRITICAL 14
	45	#define BOOKE_IRQPRIO_WATCHDOG 15
	46	#define BOOKE_IRQPRIO_EXTERNAL 16
	47	#define BOOKE_IRQPRIO_FIT 17
	48	#define BOOKE_IRQPRIO_DECREMENTER 18
	49	#define BOOKE_IRQPRIO_PERFORMANCE_MONITOR 19
c5335f17 AG	50	/* Internal pseudo-irqprio for level triggered externals */
c5335f17 AG	51	#define BOOKE_IRQPRIO_EXTERNAL_LEVEL 20
d30f6e48 SW	52	#define BOOKE_IRQPRIO_DBELL 21
	53	#define BOOKE_IRQPRIO_DBELL_CRIT 22
	54	#define BOOKE_IRQPRIO_MAX 23
	55
	56	#define BOOKE_IRQMASK_EE ((1 << BOOKE_IRQPRIO_EXTERNAL_LEVEL) \| \
	57	(1 << BOOKE_IRQPRIO_PERFORMANCE_MONITOR) \| \
	58	(1 << BOOKE_IRQPRIO_DBELL) \| \
	59	(1 << BOOKE_IRQPRIO_DECREMENTER) \| \
	60	(1 << BOOKE_IRQPRIO_FIT) \| \
	61	(1 << BOOKE_IRQPRIO_EXTERNAL))
	62
	63	#define BOOKE_IRQMASK_CE ((1 << BOOKE_IRQPRIO_DBELL_CRIT) \| \
	64	(1 << BOOKE_IRQPRIO_WATCHDOG) \| \
	65	(1 << BOOKE_IRQPRIO_CRITICAL))
bb3a8a17 HB	66
bb3a8a17 HB	67	extern unsigned long kvmppc_booke_handlers;
1d542d9c	68	extern unsigned long kvmppc_booke_handler_addr[];
d4cf3892	69
4cd35f67	70	void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr);
dd9ebf1f	71	void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr);
75f74f0d	72
38f98824	73	void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr);
dfd4d47e SW	74	void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr);
	75	void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
	76	void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
	77
d0c7dc03 HB	78	int kvmppc_booke_emulate_op(struct kvm_run run, struct kvm_vcpu vcpu,
d0c7dc03 HB	79	unsigned int inst, int *advance);
54771e62 AG	80	int kvmppc_booke_emulate_mfspr(struct kvm_vcpu vcpu, int sprn, ulong spr_val);
54771e62 AG	81	int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
d0c7dc03	82
4cd35f67 SW	83	/* low-level asm code to transfer guest state */
	84	void kvmppc_load_guest_spe(struct kvm_vcpu *vcpu);
	85	void kvmppc_save_guest_spe(struct kvm_vcpu *vcpu);
	86
	87	/* high-level function, manages flags, host state */
	88	void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu);
	89
94fa9d99 SW	90	void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
	91	void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu);
	92
d30f6e48 SW	93	enum int_class {
	94	INT_CLASS_NONCRIT,
	95	INT_CLASS_CRIT,
	96	INT_CLASS_MC,
	97	INT_CLASS_DBG,
	98	};
	99
	100	void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type);
	101
8fae845f SW	102	/*
	103	* Load up guest vcpu FP state if it's needed.
	104	* It also set the MSR_FP in thread so that host know
	105	* we're holding FPU, and then host can help to save
	106	* guest vcpu FP state if other threads require to use FPU.
	107	* This simulates an FP unavailable fault.
	108	*
	109	* It requires to be called with preemption disabled.
	110	*/
	111	static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
	112	{
	113	#ifdef CONFIG_PPC_FPU
	114	if (vcpu->fpu_active && !(current->thread.regs->msr & MSR_FP)) {
	115	load_up_fpu();
	116	current->thread.regs->msr \|= MSR_FP;
	117	}
	118	#endif
	119	}
	120
	121	/*
	122	* Save guest vcpu FP state into thread.
	123	* It requires to be called with preemption disabled.
	124	*/
	125	static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
	126	{
	127	#ifdef CONFIG_PPC_FPU
	128	if (vcpu->fpu_active && (current->thread.regs->msr & MSR_FP))
	129	giveup_fpu(current);
	130	#endif
	131	}
75f74f0d	132	#endif /* __KVM_BOOKE_H__ */