/* * TCG CPU-specific operations * * Copyright 2021 SUSE LLC * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #ifndef TCG_CPU_OPS_H #define TCG_CPU_OPS_H #include "hw/core/cpu.h" struct TCGCPUOps { /** * @initialize: Initalize TCG state * * Called when the first CPU is realized. */ void (*initialize)(void); /** * @synchronize_from_tb: Synchronize state from a TCG #TranslationBlock * * This is called when we abandon execution of a TB before starting it, * and must set all parts of the CPU state which the previous TB in the * chain may not have updated. * By default, when this is NULL, a call is made to @set_pc(tb->pc). * * If more state needs to be restored, the target must implement a * function to restore all the state, and register it here. */ void (*synchronize_from_tb)(CPUState *cpu, const TranslationBlock *tb); /** * @restore_state_to_opc: Synchronize state from INDEX_op_start_insn * * This is called when we unwind state in the middle of a TB, * usually before raising an exception. Set all part of the CPU * state which are tracked insn-by-insn in the target-specific * arguments to start_insn, passed as @data. */ void (*restore_state_to_opc)(CPUState *cpu, const TranslationBlock *tb, const uint64_t *data); /** @cpu_exec_enter: Callback for cpu_exec preparation */ void (*cpu_exec_enter)(CPUState *cpu); /** @cpu_exec_exit: Callback for cpu_exec cleanup */ void (*cpu_exec_exit)(CPUState *cpu); /** @debug_excp_handler: Callback for handling debug exceptions */ void (*debug_excp_handler)(CPUState *cpu); #ifdef NEED_CPU_H #if defined(CONFIG_USER_ONLY) && defined(TARGET_I386) /** * @fake_user_interrupt: Callback for 'fake exception' handling. * * Simulate 'fake exception' which will be handled outside the * cpu execution loop (hack for x86 user mode). */ void (*fake_user_interrupt)(CPUState *cpu); #else /** * @do_interrupt: Callback for interrupt handling. */ void (*do_interrupt)(CPUState *cpu); #endif /* !CONFIG_USER_ONLY || !TARGET_I386 */ #ifdef CONFIG_SOFTMMU /** @cpu_exec_interrupt: Callback for processing interrupts in cpu_exec */ bool (*cpu_exec_interrupt)(CPUState *cpu, int interrupt_request); /** * @tlb_fill: Handle a softmmu tlb miss * * If the access is valid, call tlb_set_page and return true; * if the access is invalid and probe is true, return false; * otherwise raise an exception and do not return. */ bool (*tlb_fill)(CPUState *cpu, vaddr address, int size, MMUAccessType access_type, int mmu_idx, bool probe, uintptr_t retaddr); /** * @do_transaction_failed: Callback for handling failed memory transactions * (ie bus faults or external aborts; not MMU faults) */ void (*do_transaction_failed)(CPUState *cpu, hwaddr physaddr, vaddr addr, unsigned size, MMUAccessType access_type, int mmu_idx, MemTxAttrs attrs, MemTxResult response, uintptr_t retaddr); /** * @do_unaligned_access: Callback for unaligned access handling * The callback must exit via raising an exception. */ G_NORETURN void (*do_unaligned_access)(CPUState *cpu, vaddr addr, MMUAccessType access_type, int mmu_idx, uintptr_t retaddr); /** * @adjust_watchpoint_address: hack for cpu_check_watchpoint used by ARM */ vaddr (*adjust_watchpoint_address)(CPUState *cpu, vaddr addr, int len); /** * @debug_check_watchpoint: return true if the architectural * watchpoint whose address has matched should really fire, used by ARM * and RISC-V */ bool (*debug_check_watchpoint)(CPUState *cpu, CPUWatchpoint *wp); /** * @debug_check_breakpoint: return true if the architectural * breakpoint whose PC has matched should really fire. */ bool (*debug_check_breakpoint)(CPUState *cpu); /** * @io_recompile_replay_branch: Callback for cpu_io_recompile. * * The cpu has been stopped, and cpu_restore_state_from_tb has been * called. If the faulting instruction is in a delay slot, and the * target architecture requires re-execution of the branch, then * adjust the cpu state as required and return true. */ bool (*io_recompile_replay_branch)(CPUState *cpu, const TranslationBlock *tb); #else /** * record_sigsegv: * @cpu: cpu context * @addr: faulting guest address * @access_type: access was read/write/execute * @maperr: true for invalid page, false for permission fault * @ra: host pc for unwinding * * We are about to raise SIGSEGV with si_code set for @maperr, * and si_addr set for @addr. Record anything further needed * for the signal ucontext_t. * * If the emulated kernel does not provide anything to the signal * handler with anything besides the user context registers, and * the siginfo_t, then this hook need do nothing and may be omitted. * Otherwise, record the data and return; the caller will raise * the signal, unwind the cpu state, and return to the main loop. * * If it is simpler to re-use the sysemu tlb_fill code, @ra is provided * so that a "normal" cpu exception can be raised. In this case, * the signal must be raised by the architecture cpu_loop. */ void (*record_sigsegv)(CPUState *cpu, vaddr addr, MMUAccessType access_type, bool maperr, uintptr_t ra); /** * record_sigbus: * @cpu: cpu context * @addr: misaligned guest address * @access_type: access was read/write/execute * @ra: host pc for unwinding * * We are about to raise SIGBUS with si_code BUS_ADRALN, * and si_addr set for @addr. Record anything further needed * for the signal ucontext_t. * * If the emulated kernel does not provide the signal handler with * anything besides the user context registers, and the siginfo_t, * then this hook need do nothing and may be omitted. * Otherwise, record the data and return; the caller will raise * the signal, unwind the cpu state, and return to the main loop. * * If it is simpler to re-use the sysemu do_unaligned_access code, * @ra is provided so that a "normal" cpu exception can be raised. * In this case, the signal must be raised by the architecture cpu_loop. */ void (*record_sigbus)(CPUState *cpu, vaddr addr, MMUAccessType access_type, uintptr_t ra); #endif /* CONFIG_SOFTMMU */ #endif /* NEED_CPU_H */ }; #endif /* TCG_CPU_OPS_H */