tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
25#include <asm/kvm_ppc.h>
26#include <asm/switch_to.h>
27#include "timing.h"
28
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
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
50/* Internal pseudo-irqprio for level triggered externals */
51#define BOOKE_IRQPRIO_EXTERNAL_LEVEL 20
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))
66
67extern unsigned long kvmppc_booke_handlers;
68
69void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr);
70void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr);
71
72void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr);
73void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
74void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
75
76int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
77 unsigned int inst, int *advance);
78int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
79int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
80
81/* low-level asm code to transfer guest state */
82void kvmppc_load_guest_spe(struct kvm_vcpu *vcpu);
83void kvmppc_save_guest_spe(struct kvm_vcpu *vcpu);
84
85/* high-level function, manages flags, host state */
86void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu);
87
88void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
89void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu);
90
91enum int_class {
92 INT_CLASS_NONCRIT,
93 INT_CLASS_CRIT,
94 INT_CLASS_MC,
95 INT_CLASS_DBG,
96};
97
98void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type);
99
100/*
101 * Load up guest vcpu FP state if it's needed.
102 * It also set the MSR_FP in thread so that host know
103 * we're holding FPU, and then host can help to save
104 * guest vcpu FP state if other threads require to use FPU.
105 * This simulates an FP unavailable fault.
106 *
107 * It requires to be called with preemption disabled.
108 */
109static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
110{
111#ifdef CONFIG_PPC_FPU
112 if (vcpu->fpu_active && !(current->thread.regs->msr & MSR_FP)) {
113 load_up_fpu();
114 current->thread.regs->msr |= MSR_FP;
115 }
116#endif
117}
118
119/*
120 * Save guest vcpu FP state into thread.
121 * It requires to be called with preemption disabled.
122 */
123static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
124{
125#ifdef CONFIG_PPC_FPU
126 if (vcpu->fpu_active && (current->thread.regs->msr & MSR_FP))
127 giveup_fpu(current);
128#endif
129}
130#endif /* __KVM_BOOKE_H__ */