From patchwork Mon Nov 1 09:51:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: gaosong X-Patchwork-Id: 12596235 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 183EFC433F5 for ; Mon, 1 Nov 2021 10:01:08 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B15AE60E54 for ; Mon, 1 Nov 2021 10:01:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B15AE60E54 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:34016 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mhU7m-0006v7-J2 for qemu-devel@archiver.kernel.org; Mon, 01 Nov 2021 06:01:06 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54272) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mhTzm-0005uY-0T for qemu-devel@nongnu.org; Mon, 01 Nov 2021 05:52:50 -0400 Received: from mail.loongson.cn ([114.242.206.163]:50906 helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mhTzh-0008Du-Gz for qemu-devel@nongnu.org; Mon, 01 Nov 2021 05:52:49 -0400 Received: from kvm-dev1.localdomain (unknown [10.2.5.134]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxn2u3uH9hbKIjAA--.55994S24; Mon, 01 Nov 2021 17:52:29 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Subject: [PATCH v8 22/29] linux-user: Add LoongArch cpu_loop support Date: Mon, 1 Nov 2021 17:51:44 +0800 Message-Id: <1635760311-20015-23-git-send-email-gaosong@loongson.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1635760311-20015-1-git-send-email-gaosong@loongson.cn> References: <1635760311-20015-1-git-send-email-gaosong@loongson.cn> X-CM-TRANSID: AQAAf9Dxn2u3uH9hbKIjAA--.55994S24 X-Coremail-Antispam: 1UD129KBjvJXoWxXrWUGr17Kr4UWr1xWw1fCrg_yoWrurykpF y3Cr13tr4kX3y7KwsxJr98ZF15Zr4IgrsrGaySkFWrCay7Jry8Cr1qgr9rtFyUC3yUuF1x Zr9Iv3ZF9F45uF7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnUUvcSsGvfC2KfnxnUUI43ZEXa7xR_UUUUUUUUU== X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ 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 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: , Cc: peter.maydell@linaro.org, thuth@redhat.com, chenhuacai@loongson.cn, philmd@redhat.com, i.qemu@xen0n.name, richard.henderson@linaro.org, laurent@vivier.eu, peterx@redhat.com, f4bug@amsat.org, yangxiaojuan@loongson.cn, alistair.francis@wdc.com, maobibo@loongson.cn, pbonzini@redhat.com, bmeng.cn@gmail.com, alex.bennee@linaro.org, gaosong@loongson.cn Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Song Gao Signed-off-by: Xiaojuan Yang --- configure | 5 ++ linux-user/loongarch64/cpu_loop.c | 98 +++++++++++++++++++++++++++++++++++++ linux-user/loongarch64/target_cpu.h | 35 +++++++++++++ 3 files changed, 138 insertions(+) create mode 100644 linux-user/loongarch64/cpu_loop.c create mode 100644 linux-user/loongarch64/target_cpu.h diff --git a/configure b/configure index 039467c..9563595 100755 --- a/configure +++ b/configure @@ -579,6 +579,8 @@ elif check_define __arm__ ; then cpu="arm" elif check_define __aarch64__ ; then cpu="aarch64" +elif check_define __loongarch64__ ; then + cpu="loongarch64" else cpu=$(uname -m) fi @@ -610,6 +612,9 @@ case "$cpu" in sparc|sun4[cdmuv]) cpu="sparc" ;; + loongarch) + cpu="loongarch" + ;; *) # This will result in either an error or falling back to TCI later ARCH=unknown diff --git a/linux-user/loongarch64/cpu_loop.c b/linux-user/loongarch64/cpu_loop.c new file mode 100644 index 0000000..2529683 --- /dev/null +++ b/linux-user/loongarch64/cpu_loop.c @@ -0,0 +1,98 @@ +/* + * QEMU LoongArch user cpu_loop. + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#include "qemu/osdep.h" +#include "qemu.h" +#include "qemu-common.h" +#include "user-internals.h" +#include "cpu_loop-common.h" +#include "signal-common.h" + +void cpu_loop(CPULoongArchState *env) +{ + CPUState *cs = env_cpu(env); + int trapnr, si_code; + abi_long ret; + + for (;;) { + cpu_exec_start(cs); + trapnr = 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 EXCP_SYSCALL: + env->pc += 4; + ret = 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 == -TARGET_ERESTARTSYS) { + env->pc -= 4; + break; + } + if (ret == -TARGET_QEMU_ESIGRETURN) { + /* + * Returning from a successful sigreturn syscall. + * Avoid clobbering register state. + */ + break; + } + env->gpr[4] = ret; + break; + case EXCP_ADE: + force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR, env->badaddr); + break; + case EXCP_INE: + force_sig_fault(TARGET_SIGILL, 0, env->pc); + break; + case EXCP_FPE: + si_code = TARGET_FPE_FLTUNK; + if (GET_FP_CAUSE(env->fcsr0) & FP_INVALID) { + si_code = TARGET_FPE_FLTINV; + } else if (GET_FP_CAUSE(env->fcsr0) & FP_DIV0) { + si_code = TARGET_FPE_FLTDIV; + } else if (GET_FP_CAUSE(env->fcsr0) & FP_OVERFLOW) { + si_code = TARGET_FPE_FLTOVF; + } else if (GET_FP_CAUSE(env->fcsr0) & FP_UNDERFLOW) { + si_code = TARGET_FPE_FLTUND; + } else if (GET_FP_CAUSE(env->fcsr0) & FP_INEXACT) { + si_code = TARGET_FPE_FLTRES; + } + force_sig_fault(TARGET_SIGFPE, si_code, env->pc); + break; + case EXCP_DEBUG: + case EXCP_BREAK: + force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, 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 = 0; i < 32; i++) { + env->gpr[i] = regs->regs[i]; + } + env->pc = regs->csr_era; + +} diff --git a/linux-user/loongarch64/target_cpu.h b/linux-user/loongarch64/target_cpu.h new file mode 100644 index 0000000..5bd13a7 --- /dev/null +++ b/linux-user/loongarch64/target_cpu.h @@ -0,0 +1,35 @@ +/* + * LoongArch specific CPU ABI and functions for linux-user + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#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] = newsp; + } + env->gpr[4] = 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] = newtls; +} + +static inline abi_ulong get_sp_from_cpustate(CPULoongArchState *state) +{ + return state->gpr[3]; +} +#endif