From nobody Wed Feb 11 04:39:27 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1655975275696496.22263985732855; Thu, 23 Jun 2022 02:07:55 -0700 (PDT) Received: from localhost ([::1]:38634 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o4Ioc-0003AN-MX for importer@patchew.org; Thu, 23 Jun 2022 05:07:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38574) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4Ico-0005rm-IH for qemu-devel@nongnu.org; Thu, 23 Jun 2022 04:55:42 -0400 Received: from mail.loongson.cn ([114.242.206.163]:52286 helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o4Ick-0008S2-2I for qemu-devel@nongnu.org; Thu, 23 Jun 2022 04:55:42 -0400 Received: from localhost.localdomain (unknown [10.2.5.185]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9DxP0x_KrRiTjVWAA--.30922S7; Thu, 23 Jun 2022 16:55:33 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, laurent@vivier.eu, gaosong@loongson.cn, Xiaojuan Yang Subject: [PATCH v19 05/13] linux-user: Add LoongArch cpu_loop support Date: Thu, 23 Jun 2022 16:55:18 +0800 Message-Id: <20220623085526.1678168-6-gaosong@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220623085526.1678168-1-gaosong@loongson.cn> References: <20220623085526.1678168-1-gaosong@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf9DxP0x_KrRiTjVWAA--.30922S7 X-Coremail-Antispam: 1UD129KBjvJXoWxXrWUGr45Aw47AF1rCFWDtwb_yoWrWF1rpF yxCr45Kr4xJ3y2gw4fJ3s5AF1rZr4I939rGaySkayrAay7Jryrur1qgr9rtFy7C3yUWFyx Zr9xZ3ZF9F4rWFJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnUUvcSsGvfC2KfnxnUUI43ZEXa7xR_UUUUUUUUU== X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=114.242.206.163; envelope-from=gaosong@loongson.cn; helo=loongson.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1655975276584100003 Content-Type: text/plain; charset="utf-8" Signed-off-by: Song Gao Signed-off-by: Xiaojuan Yang Reviewed-by: Richard Henderson --- linux-user/loongarch64/cpu_loop.c | 96 +++++++++++++++++++++++++++++ linux-user/loongarch64/target_cpu.h | 34 ++++++++++ 2 files changed, 130 insertions(+) create mode 100644 linux-user/loongarch64/cpu_loop.c create mode 100644 linux-user/loongarch64/target_cpu.h diff --git a/linux-user/loongarch64/cpu_loop.c b/linux-user/loongarch64/cpu= _loop.c new file mode 100644 index 0000000000..894fdd111a --- /dev/null +++ b/linux-user/loongarch64/cpu_loop.c @@ -0,0 +1,96 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * QEMU LoongArch user cpu_loop. + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + */ + +#include "qemu/osdep.h" +#include "qemu.h" +#include "user-internals.h" +#include "cpu_loop-common.h" +#include "signal-common.h" + +void cpu_loop(CPULoongArchState *env) +{ + CPUState *cs =3D env_cpu(env); + int trapnr, si_code; + abi_long ret; + + for (;;) { + cpu_exec_start(cs); + trapnr =3D cpu_exec(cs); + cpu_exec_end(cs); + process_queued_cpu_work(cs); + + switch (trapnr) { + case EXCP_INTERRUPT: + /* just indicate that signals should be handled asap */ + break; + case EXCCODE_SYS: + env->pc +=3D 4; + ret =3D do_syscall(env, env->gpr[11], + env->gpr[4], env->gpr[5], + env->gpr[6], env->gpr[7], + env->gpr[8], env->gpr[9], + -1, -1); + if (ret =3D=3D -QEMU_ERESTARTSYS) { + env->pc -=3D 4; + break; + } + if (ret =3D=3D -QEMU_ESIGRETURN) { + /* + * Returning from a successful sigreturn syscall. + * Avoid clobbering register state. + */ + break; + } + env->gpr[4] =3D ret; + break; + case EXCCODE_INE: + force_sig_fault(TARGET_SIGILL, 0, env->pc); + break; + case EXCCODE_FPE: + si_code =3D TARGET_FPE_FLTUNK; + if (GET_FP_CAUSE(env->fcsr0) & FP_INVALID) { + si_code =3D TARGET_FPE_FLTINV; + } else if (GET_FP_CAUSE(env->fcsr0) & FP_DIV0) { + si_code =3D TARGET_FPE_FLTDIV; + } else if (GET_FP_CAUSE(env->fcsr0) & FP_OVERFLOW) { + si_code =3D TARGET_FPE_FLTOVF; + } else if (GET_FP_CAUSE(env->fcsr0) & FP_UNDERFLOW) { + si_code =3D TARGET_FPE_FLTUND; + } else if (GET_FP_CAUSE(env->fcsr0) & FP_INEXACT) { + si_code =3D TARGET_FPE_FLTRES; + } + force_sig_fault(TARGET_SIGFPE, si_code, env->pc); + break; + case EXCP_DEBUG: + case EXCCODE_BRK: + force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc); + break; + case EXCCODE_BCE: + force_sig_fault(TARGET_SIGSYS, TARGET_SI_KERNEL, env->pc); + break; + case EXCP_ATOMIC: + cpu_exec_step_atomic(cs); + break; + default: + EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\= n", + trapnr); + exit(EXIT_FAILURE); + } + process_pending_signals(env); + } +} + +void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) +{ + int i; + + for (i =3D 0; i < 32; i++) { + env->gpr[i] =3D regs->regs[i]; + } + env->pc =3D regs->csr.era; + +} diff --git a/linux-user/loongarch64/target_cpu.h b/linux-user/loongarch64/t= arget_cpu.h new file mode 100644 index 0000000000..a29af66156 --- /dev/null +++ b/linux-user/loongarch64/target_cpu.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * LoongArch specific CPU ABI and functions for linux-user + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + */ + +#ifndef LOONGARCH_TARGET_CPU_H +#define LOONGARCH_TARGET_CPU_H + +static inline void cpu_clone_regs_child(CPULoongArchState *env, + target_ulong newsp, unsigned flags) +{ + if (newsp) { + env->gpr[3] =3D newsp; + } + env->gpr[4] =3D 0; +} + +static inline void cpu_clone_regs_parent(CPULoongArchState *env, + unsigned flags) +{ +} + +static inline void cpu_set_tls(CPULoongArchState *env, target_ulong newtls) +{ + env->gpr[2] =3D newtls; +} + +static inline abi_ulong get_sp_from_cpustate(CPULoongArchState *state) +{ + return state->gpr[3]; +} +#endif --=20 2.31.1