From 120964219d7cb6c72ae629a7a71ff9c45a9c8a9b Mon Sep 17 00:00:00 2001 From: Philippe Mathieu-Daudé Date: Sat, 11 Sep 2021 18:54:15 +0200 Subject: accel/tcg: Rename user-mode do_interrupt hack as fake_user_interrupt MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit do_interrupt() is sysemu specific. However due to some X86 specific hack, it is also used in user-mode emulation, which is why it couldn't be restricted to CONFIG_SOFTMMU (see the comment around added in commit 78271684719: "cpu: tcg_ops: move to tcg-cpu-ops.h, keep a pointer in CPUClass"). Keep the hack but rename the handler as fake_user_interrupt() and restrict do_interrupt() to sysemu. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Warner Losh Reviewed-by: Richard Henderson Message-Id: <20210911165434.531552-6-f4bug@amsat.org> Signed-off-by: Richard Henderson --- include/hw/core/tcg-cpu-ops.h | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) (limited to 'include/hw/core/tcg-cpu-ops.h') diff --git a/include/hw/core/tcg-cpu-ops.h b/include/hw/core/tcg-cpu-ops.h index eab27d0c03..6c7ab9600b 100644 --- a/include/hw/core/tcg-cpu-ops.h +++ b/include/hw/core/tcg-cpu-ops.h @@ -37,14 +37,6 @@ struct TCGCPUOps { void (*cpu_exec_exit)(CPUState *cpu); /** @cpu_exec_interrupt: Callback for processing interrupts in cpu_exec */ bool (*cpu_exec_interrupt)(CPUState *cpu, int interrupt_request); - /** - * @do_interrupt: Callback for interrupt handling. - * - * note that this is in general SOFTMMU only, but it actually isn't - * because of an x86 hack (accel/tcg/cpu-exec.c), so we cannot put it - * in the SOFTMMU section in general. - */ - void (*do_interrupt)(CPUState *cpu); /** * @tlb_fill: Handle a softmmu tlb miss or user-only address fault * @@ -61,6 +53,20 @@ struct TCGCPUOps { 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 /** * @do_transaction_failed: Callback for handling failed memory transactions -- cgit 1.4.1 From 77c0fc4e55cd7edf2f109fd5dca2395a1c91e9e7 Mon Sep 17 00:00:00 2001 From: Philippe Mathieu-Daudé Date: Sat, 11 Sep 2021 18:54:33 +0200 Subject: accel/tcg: Restrict TCGCPUOps::cpu_exec_interrupt() to sysemu MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit All targets call TCGCPUOps::cpu_exec_interrupt() from sysemu code. Move its declaration to restrict it to system emulation. Extend the code guarded. Restrict the static inlined need_replay_interrupt() method to avoid a "defined but not used" warning. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-Id: <20210911165434.531552-24-f4bug@amsat.org> Signed-off-by: Richard Henderson --- accel/tcg/cpu-exec.c | 10 +++++++--- include/hw/core/tcg-cpu-ops.h | 4 ++-- 2 files changed, 9 insertions(+), 5 deletions(-) (limited to 'include/hw/core/tcg-cpu-ops.h') diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index 2838177e7f..75dbc1e4e3 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -685,6 +685,7 @@ static inline bool cpu_handle_exception(CPUState *cpu, int *ret) return false; } +#ifndef CONFIG_USER_ONLY /* * CPU_INTERRUPT_POLL is a virtual event which gets converted into a * "real" interrupt event later. It does not need to be recorded for @@ -698,12 +699,11 @@ static inline bool need_replay_interrupt(int interrupt_request) return true; #endif } +#endif /* !CONFIG_USER_ONLY */ static inline bool cpu_handle_interrupt(CPUState *cpu, TranslationBlock **last_tb) { - CPUClass *cc = CPU_GET_CLASS(cpu); - /* Clear the interrupt flag now since we're processing * cpu->interrupt_request and cpu->exit_request. * Ensure zeroing happens before reading cpu->exit_request or @@ -725,6 +725,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, qemu_mutex_unlock_iothread(); return true; } +#if !defined(CONFIG_USER_ONLY) if (replay_mode == REPLAY_MODE_PLAY && !replay_has_interrupt()) { /* Do nothing */ } else if (interrupt_request & CPU_INTERRUPT_HALT) { @@ -753,12 +754,14 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, qemu_mutex_unlock_iothread(); return true; } -#endif +#endif /* !TARGET_I386 */ /* The target hook has 3 exit conditions: False when the interrupt isn't processed, True when it is, and we should restart on a new TB, and via longjmp via cpu_loop_exit. */ else { + CPUClass *cc = CPU_GET_CLASS(cpu); + if (cc->tcg_ops->cpu_exec_interrupt && cc->tcg_ops->cpu_exec_interrupt(cpu, interrupt_request)) { if (need_replay_interrupt(interrupt_request)) { @@ -777,6 +780,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, * reload the 'interrupt_request' value */ interrupt_request = cpu->interrupt_request; } +#endif /* !CONFIG_USER_ONLY */ if (interrupt_request & CPU_INTERRUPT_EXITTB) { cpu->interrupt_request &= ~CPU_INTERRUPT_EXITTB; /* ensure that no TB jump will be modified as diff --git a/include/hw/core/tcg-cpu-ops.h b/include/hw/core/tcg-cpu-ops.h index 6c7ab9600b..55123cb4d2 100644 --- a/include/hw/core/tcg-cpu-ops.h +++ b/include/hw/core/tcg-cpu-ops.h @@ -35,8 +35,6 @@ struct TCGCPUOps { void (*cpu_exec_enter)(CPUState *cpu); /** @cpu_exec_exit: Callback for cpu_exec cleanup */ void (*cpu_exec_exit)(CPUState *cpu); - /** @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 or user-only address fault * @@ -68,6 +66,8 @@ struct TCGCPUOps { 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); /** * @do_transaction_failed: Callback for handling failed memory transactions * (ie bus faults or external aborts; not MMU faults) -- cgit 1.4.1