From nobody Mon Oct 7 19:40:07 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1727848366; cv=none; d=zohomail.com; s=zohoarc; b=k5fXqIuJhbZDZrd1tdqoQ4UCazAmG8+W8z2RxGMOSOKbGLAh+JvJYhnlEMpUr65BqKaac/Y1bNwMV7V3mo4TXDE6TrBDIcK1cz762CYuQKnxFIYIDZ5DlqyK/GlywcIdrd3W8TqqTxLhukta7dMRwGNeQM9ovFwG6ZQEjk05qr8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1727848366; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=WMEwfkDGJxFlSiHtuevZ/KnFCPhV2N4w5AdC1KNTQqA=; b=afnprML3dmurdmBA8/9vAhOKKUxmimsmLaqQTT5i7zHUsr5+Bu592y2M6oaBJb+yR/LqWIN07PsEf+92azKOdRM5BouLRuj4s4PiiCCd8j1/MMsPdAiN7BXtOOoNjamUz3o2LAfNick17oQIUTt0Ka+Hhqdr9fC4e+gCiQWaqPY= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1727848366084889.7039647905607; Tue, 1 Oct 2024 22:52:46 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1svsHN-0006WD-9k; Wed, 02 Oct 2024 01:52:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1svsHL-0006Rk-0a for qemu-devel@nongnu.org; Wed, 02 Oct 2024 01:52:03 -0400 Received: from mail-pl1-x629.google.com ([2607:f8b0:4864:20::629]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1svsHH-0004uQ-SH for qemu-devel@nongnu.org; Wed, 02 Oct 2024 01:52:01 -0400 Received: by mail-pl1-x629.google.com with SMTP id d9443c01a7336-20b0b5cdb57so3561325ad.1 for ; Tue, 01 Oct 2024 22:51:59 -0700 (PDT) Received: from toolbox.alistair23.me (2403-580b-97e8-0-82ce-f179-8a79-69f4.ip6.aussiebb.net. [2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20b37e60c76sm78324235ad.269.2024.10.01.22.51.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Oct 2024 22:51:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1727848318; x=1728453118; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=WMEwfkDGJxFlSiHtuevZ/KnFCPhV2N4w5AdC1KNTQqA=; b=PR6XRelPYdhZDxC3LfcFnEmmBwbT9PPGdyoZrAjrZfz5tAG/dgBiQ5I+4tmtInKyyI Z1TRPiBESDExmVr7HF7NnT2mzYJYsY2OAhEBKfQLjkmT08fmLZBNXM9gJ3efiGQWKXPX 8Ck/DJIxyOHjt6WmdTc+4wK3rhPsR8lgIc+mFakj6UWFl9OZpLsf12pQVS7CxlK6aYxi 90qKVUrGD+VP26WEbdhmXHOlef50DMRwnG3fLR4/ErZfKfJQ3cFGKgloeLpxbE3O5Gpk JvuylbooMSeKzlKzEa0f/Xi/W8hjmNqQP4h+vILRIC8kszSmi7klYFlwFZ+B96VyMA39 nKeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727848318; x=1728453118; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=WMEwfkDGJxFlSiHtuevZ/KnFCPhV2N4w5AdC1KNTQqA=; b=jijn9bE9HmDmlfXAGJsYyTWMCQ16jvYihWk+Cty1gPge8usIJci7VeBYCgjcKGDi2F J6eGgUiW3py0XSQCaznJzq372uPOQ/m6eB2KAKCVQx0fjlMcLl7yGdKBJG3s2BOdJbo8 sC66KUQLL927mdPteGradbA4V6ruVEF00m0A+BQyVVdt5EUdmVBPVuV6ykPL+JyTwOtt NezWRqF8X64btUtc2SkWAHs0S8AEX3+iQruIOVpX8ZCmAqz6w58By4v7d+ieYPD2E2Ar iyajDRlKXdkvFI231ouczSLuYAvy87JrzLwuThANC85Ha1mE1qFx8wnHaiheYewH+IRa A7XA== X-Gm-Message-State: AOJu0Yx/fTDtVasxRPc3yz8uaRn66KwIpV2Ixl0bp8wYYpWzg+/O56Bz 8Ipdc54DZbfvc09pLkrFiLsZOrKRcjw3wFAgP50Gv0XKgYR/WZZj7LJEitFR X-Google-Smtp-Source: AGHT+IGWtRp/vbX6+71wox3fs6PG6CPKupT1djqdmWQBIbgexDAoKq8gr6kHTJhduH6/YrrU4EtqHQ== X-Received: by 2002:a17:902:db04:b0:207:1845:bc48 with SMTP id d9443c01a7336-20bc5c07860mr22758355ad.30.1727848318394; Tue, 01 Oct 2024 22:51:58 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Mark Corbin , Ajeet Singh , Jessica Clarke , Kyle Evans , Richard Henderson , Alistair Francis Subject: [PULL v3 20/35] bsd-user: Add RISC-V CPU execution loop and syscall handling Date: Wed, 2 Oct 2024 15:50:33 +1000 Message-ID: <20241002055048.556083-21-alistair.francis@wdc.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241002055048.556083-1-alistair.francis@wdc.com> References: <20241002055048.556083-1-alistair.francis@wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2607:f8b0:4864:20::629; envelope-from=alistair23@gmail.com; helo=mail-pl1-x629.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1727848366315116600 Content-Type: text/plain; charset="utf-8" From: Mark Corbin Implemented the RISC-V CPU execution loop, including handling various exceptions and system calls. The loop continuously executes CPU instructions,processes exceptions, and handles system calls by invoking FreeBSD syscall handlers. Signed-off-by: Mark Corbin Signed-off-by: Ajeet Singh Co-authored-by: Jessica Clarke Co-authored-by: Kyle Evans Reviewed-by: Richard Henderson Message-ID: <20240916155119.14610-3-itachis@FreeBSD.org> Signed-off-by: Alistair Francis --- bsd-user/riscv/target_arch_cpu.h | 94 ++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) diff --git a/bsd-user/riscv/target_arch_cpu.h b/bsd-user/riscv/target_arch_= cpu.h index f8d85e01ad..9c31d9dc4c 100644 --- a/bsd-user/riscv/target_arch_cpu.h +++ b/bsd-user/riscv/target_arch_cpu.h @@ -37,4 +37,98 @@ static inline void target_cpu_init(CPURISCVState *env, env->pc =3D regs->sepc; } =20 +static inline void target_cpu_loop(CPURISCVState *env) +{ + CPUState *cs =3D env_cpu(env); + int trapnr; + abi_long ret; + unsigned int syscall_num; + int32_t signo, code; + + for (;;) { + cpu_exec_start(cs); + trapnr =3D cpu_exec(cs); + cpu_exec_end(cs); + process_queued_cpu_work(cs); + + signo =3D 0; + + switch (trapnr) { + case EXCP_INTERRUPT: + /* just indicate that signals should be handled asap */ + break; + case EXCP_ATOMIC: + cpu_exec_step_atomic(cs); + break; + case RISCV_EXCP_U_ECALL: + syscall_num =3D env->gpr[xT0]; + env->pc +=3D TARGET_INSN_SIZE; + /* Compare to cpu_fetch_syscall_args() in riscv/riscv/trap.c */ + if (TARGET_FREEBSD_NR___syscall =3D=3D syscall_num || + TARGET_FREEBSD_NR_syscall =3D=3D syscall_num) { + ret =3D do_freebsd_syscall(env, + env->gpr[xA0], + env->gpr[xA1], + env->gpr[xA2], + env->gpr[xA3], + env->gpr[xA4], + env->gpr[xA5], + env->gpr[xA6], + env->gpr[xA7], + 0); + } else { + ret =3D do_freebsd_syscall(env, + syscall_num, + env->gpr[xA0], + env->gpr[xA1], + env->gpr[xA2], + env->gpr[xA3], + env->gpr[xA4], + env->gpr[xA5], + env->gpr[xA6], + env->gpr[xA7] + ); + } + + /* + * Compare to cpu_set_syscall_retval() in + * riscv/riscv/vm_machdep.c + */ + if (ret >=3D 0) { + env->gpr[xA0] =3D ret; + env->gpr[xT0] =3D 0; + } else if (ret =3D=3D -TARGET_ERESTART) { + env->pc -=3D TARGET_INSN_SIZE; + } else if (ret !=3D -TARGET_EJUSTRETURN) { + env->gpr[xA0] =3D -ret; + env->gpr[xT0] =3D 1; + } + break; + case RISCV_EXCP_ILLEGAL_INST: + signo =3D TARGET_SIGILL; + code =3D TARGET_ILL_ILLOPC; + break; + case RISCV_EXCP_BREAKPOINT: + signo =3D TARGET_SIGTRAP; + code =3D TARGET_TRAP_BRKPT; + break; + case EXCP_DEBUG: + signo =3D TARGET_SIGTRAP; + code =3D TARGET_TRAP_BRKPT; + break; + default: + fprintf(stderr, "qemu: unhandled CPU exception " + "0x%x - aborting\n", trapnr); + cpu_dump_state(cs, stderr, 0); + abort(); + } + + if (signo) { + force_sig_fault(signo, code, env->pc); + } + + process_pending_signals(env); + } +} + #endif /* TARGET_ARCH_CPU_H */ --=20 2.46.2