LXR linux/arch/powerpc/include/asm/asm-prototypes.h

   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 */
  23extern struct task_struct *current_set[NR_CPUS];
  24extern struct task_struct *secondary_current;
  25void start_secondary(void *unused);
  26
  27/* kexec */
  28struct paca_struct;
  29struct kimage;
  30extern struct paca_struct kexec_paca;
  31void kexec_copy_flush(struct kimage *image);
  32
  33/* pseries hcall tracing */
  34extern struct static_key hcall_tracepoint_key;
  35void __trace_hcall_entry(unsigned long opcode, unsigned long *args);
  36void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf);
  37
  38/* Ultravisor */
  39#if defined(CONFIG_PPC_POWERNV) || defined(CONFIG_PPC_SVM)
  40long ucall_norets(unsigned long opcode, ...);
  41#else
  42static inline long ucall_norets(unsigned long opcode, ...)
  43{
  44        return U_NOT_AVAILABLE;
  45}
  46#endif
  47
  48/* OPAL */
  49int64_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 */
  54int enter_vmx_usercopy(void);
  55int exit_vmx_usercopy(void);
  56int enter_vmx_ops(void);
  57void *exit_vmx_ops(void *dest);
  58
  59/* signals, syscalls and interrupts */
  60long sys_swapcontext(struct ucontext __user *old_ctx,
  61                    struct ucontext __user *new_ctx,
  62                    long ctx_size);
  63#ifdef CONFIG_PPC32
  64long sys_debug_setcontext(struct ucontext __user *ctx,
  65                          int ndbg, struct sig_dbg_op __user *dbg);
  66int
  67ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
  68           struct __kernel_old_timeval __user *tvp);
  69unsigned long __init early_init(unsigned long dt_ptr);
  70void __init machine_init(u64 dt_ptr);
  71#endif
  72long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8, unsigned long r0, struct pt_regs *regs);
  73notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
  74notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
  75notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
  76#ifdef CONFIG_PPC64
  77unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
  78unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
  79unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
  80#endif
  81
  82long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
  83                      u32 len_high, u32 len_low);
  84long sys_switch_endian(void);
  85
  86/* prom_init (OpenFirmware) */
  87unsigned 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 */
  93void __init early_setup(unsigned long dt_ptr);
  94void early_setup_secondary(void);
  95
  96/* misc runtime */
  97extern u64 __bswapdi2(u64);
  98extern s64 __lshrdi3(s64, int);
  99extern s64 __ashldi3(s64, int);
 100extern s64 __ashrdi3(s64, int);
 101extern int __cmpdi2(s64, s64);
 102extern int __ucmpdi2(u64, u64);
 103
 104/* tracing */
 105void _mcount(void);
 106unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
 107                                                unsigned long sp);
 108
 109void pnv_power9_force_smt4_catch(void);
 110void pnv_power9_force_smt4_release(void);
 111
 112/* Transaction memory related */
 113void tm_enable(void);
 114void tm_disable(void);
 115void tm_abort(uint8_t cause);
 116
 117struct kvm_vcpu;
 118void _kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu, u64 guest_msr);
 119void _kvmppc_save_tm_pr(struct kvm_vcpu *vcpu, u64 guest_msr);
 120
 121/* Patch sites */
 122extern s32 patch__call_flush_branch_caches1;
 123extern s32 patch__call_flush_branch_caches2;
 124extern s32 patch__call_flush_branch_caches3;
 125extern s32 patch__flush_count_cache_return;
 126extern s32 patch__flush_link_stack_return;
 127extern s32 patch__call_kvm_flush_link_stack;
 128extern s32 patch__call_kvm_flush_link_stack_p9;
 129extern s32 patch__memset_nocache, patch__memcpy_nocache;
 130
 131extern long flush_branch_caches;
 132extern long kvm_flush_link_stack;
 133
 134#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 135void kvmppc_save_tm_hv(struct kvm_vcpu *vcpu, u64 msr, bool preserve_nv);
 136void kvmppc_restore_tm_hv(struct kvm_vcpu *vcpu, u64 msr, bool preserve_nv);
 137#else
 138static inline void kvmppc_save_tm_hv(struct kvm_vcpu *vcpu, u64 msr,
 139                                     bool preserve_nv) { }
 140static inline void kvmppc_restore_tm_hv(struct kvm_vcpu *vcpu, u64 msr,
 141                                        bool preserve_nv) { }
 142#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
 143
 144void kvmhv_save_host_pmu(void);
 145void kvmhv_load_host_pmu(void);
 146void kvmhv_save_guest_pmu(struct kvm_vcpu *vcpu, bool pmu_in_use);
 147void kvmhv_load_guest_pmu(struct kvm_vcpu *vcpu);
 148
 149void kvmppc_p9_enter_guest(struct kvm_vcpu *vcpu);
 150
 151long kvmppc_h_set_dabr(struct kvm_vcpu *vcpu, unsigned long dabr);
 152long kvmppc_h_set_xdabr(struct kvm_vcpu *vcpu, unsigned long dabr,
 153                        unsigned long dabrx);
 154
 155#endif /* _ASM_POWERPC_ASM_PROTOTYPES_H */
 156