1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_POWERPC_ASM_PROTOTYPES_H
3 #define _ASM_POWERPC_ASM_PROTOTYPES_H
4 /*
5 * This file is for prototypes of C functions that are only called
6 * from asm, and any associated variables.
7 *
8 * Copyright 2016, Daniel Axtens, IBM Corporation.
9 */
10
11 #include <linux/threads.h>
12 #include <asm/cacheflush.h>
13 #include <asm/checksum.h>
14 #include <linux/uaccess.h>
15 #include <asm/epapr_hcalls.h>
16 #include <asm/dcr.h>
17 #include <asm/mmu_context.h>
18 #include <asm/ultravisor-api.h>
19
20 #include <uapi/asm/ucontext.h>
21
22 /* SMP */
23 extern struct task_struct *current_set[NR_CPUS];
24 extern struct task_struct *secondary_current;
25 void start_secondary(void *unused);
26
27 /* kexec */
28 struct paca_struct;
29 struct kimage;
30 extern struct paca_struct kexec_paca;
31 void kexec_copy_flush(struct kimage *image);
32
33 /* pseries hcall tracing */
34 extern struct static_key hcall_tracepoint_key;
35 void __trace_hcall_entry(unsigned long opcode, unsigned long *args);
36 void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf);
37
38 /* Ultravisor */
39 #if defined(CONFIG_PPC_POWERNV) || defined(CONFIG_PPC_SVM)
40 long ucall_norets(unsigned long opcode, ...);
41 #else
ucall_norets(unsigned long opcode,...)42 static inline long ucall_norets(unsigned long opcode, ...)
43 {
44 return U_NOT_AVAILABLE;
45 }
46 #endif
47
48 /* OPAL */
49 int64_t __opal_call(int64_t a0, int64_t a1, int64_t a2, int64_t a3,
50 int64_t a4, int64_t a5, int64_t a6, int64_t a7,
51 int64_t opcode, uint64_t msr);
52
53 /* VMX copying */
54 int enter_vmx_usercopy(void);
55 int exit_vmx_usercopy(void);
56 int enter_vmx_ops(void);
57 void *exit_vmx_ops(void *dest);
58
59 /* signals, syscalls and interrupts */
60 long sys_swapcontext(struct ucontext __user *old_ctx,
61 struct ucontext __user *new_ctx,
62 long ctx_size);
63 #ifdef CONFIG_PPC32
64 long sys_debug_setcontext(struct ucontext __user *ctx,
65 int ndbg, struct sig_dbg_op __user *dbg);
66 int
67 ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
68 struct __kernel_old_timeval __user *tvp);
69 unsigned long __init early_init(unsigned long dt_ptr);
70 void __init machine_init(u64 dt_ptr);
71 #endif
72 long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8, unsigned long r0, struct pt_regs *regs);
73 notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
74 notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
75 notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
76 #ifdef CONFIG_PPC64
77 unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
78 unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
79 unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
80 #endif
81
82 long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
83 u32 len_high, u32 len_low);
84 long sys_switch_endian(void);
85
86 /* prom_init (OpenFirmware) */
87 unsigned long __init prom_init(unsigned long r3, unsigned long r4,
88 unsigned long pp,
89 unsigned long r6, unsigned long r7,
90 unsigned long kbase);
91
92 /* setup */
93 void __init early_setup(unsigned long dt_ptr);
94 void early_setup_secondary(void);
95
96 /* misc runtime */
97 extern u64 __bswapdi2(u64);
98 extern s64 __lshrdi3(s64, int);
99 extern s64 __ashldi3(s64, int);
100 extern s64 __ashrdi3(s64, int);
101 extern int __cmpdi2(s64, s64);
102 extern int __ucmpdi2(u64, u64);
103
104 /* tracing */
105 void _mcount(void);
106 unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
107 unsigned long sp);
108
109 void pnv_power9_force_smt4_catch(void);
110 void pnv_power9_force_smt4_release(void);
111
112 /* Transaction memory related */
113 void tm_enable(void);
114 void tm_disable(void);
115 void tm_abort(uint8_t cause);
116
117 struct kvm_vcpu;
118 void _kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu, u64 guest_msr);
119 void _kvmppc_save_tm_pr(struct kvm_vcpu *vcpu, u64 guest_msr);
120
121 /* Patch sites */
122 extern s32 patch__call_flush_branch_caches1;
123 extern s32 patch__call_flush_branch_caches2;
124 extern s32 patch__call_flush_branch_caches3;
125 extern s32 patch__flush_count_cache_return;
126 extern s32 patch__flush_link_stack_return;
127 extern s32 patch__call_kvm_flush_link_stack;
128 extern s32 patch__call_kvm_flush_link_stack_p9;
129 extern s32 patch__memset_nocache, patch__memcpy_nocache;
130
131 extern long flush_branch_caches;
132 extern long kvm_flush_link_stack;
133
134 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
135 void kvmppc_save_tm_hv(struct kvm_vcpu *vcpu, u64 msr, bool preserve_nv);
136 void kvmppc_restore_tm_hv(struct kvm_vcpu *vcpu, u64 msr, bool preserve_nv);
137 #else
kvmppc_save_tm_hv(struct kvm_vcpu * vcpu,u64 msr,bool preserve_nv)138 static inline void kvmppc_save_tm_hv(struct kvm_vcpu *vcpu, u64 msr,
139 bool preserve_nv) { }
kvmppc_restore_tm_hv(struct kvm_vcpu * vcpu,u64 msr,bool preserve_nv)140 static inline void kvmppc_restore_tm_hv(struct kvm_vcpu *vcpu, u64 msr,
141 bool preserve_nv) { }
142 #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
143
144 void kvmhv_save_host_pmu(void);
145 void kvmhv_load_host_pmu(void);
146 void kvmhv_save_guest_pmu(struct kvm_vcpu *vcpu, bool pmu_in_use);
147 void kvmhv_load_guest_pmu(struct kvm_vcpu *vcpu);
148
149 void kvmppc_p9_enter_guest(struct kvm_vcpu *vcpu);
150
151 long kvmppc_h_set_dabr(struct kvm_vcpu *vcpu, unsigned long dabr);
152 long kvmppc_h_set_xdabr(struct kvm_vcpu *vcpu, unsigned long dabr,
153 unsigned long dabrx);
154
155 #endif /* _ASM_POWERPC_ASM_PROTOTYPES_H */
156