From nobody Sat Nov 16 19:12:25 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=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1656417161584618.2937430602967; Tue, 28 Jun 2022 04:52:41 -0700 (PDT) Received: from localhost ([::1]:32776 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o69lo-0000E7-Go for importer@patchew.org; Tue, 28 Jun 2022 07:52:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47678) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o69ck-00081s-Pz for qemu-devel@nongnu.org; Tue, 28 Jun 2022 07:43:19 -0400 Received: from mail-pl1-x62e.google.com ([2607:f8b0:4864:20::62e]:39649) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1o69ci-0007jz-OI for qemu-devel@nongnu.org; Tue, 28 Jun 2022 07:43:18 -0400 Received: by mail-pl1-x62e.google.com with SMTP id x20so5219986plx.6 for ; Tue, 28 Jun 2022 04:43:16 -0700 (PDT) Received: from stoup.. ([122.255.60.245]) by smtp.gmail.com with ESMTPSA id bf3-20020a170902b90300b0015f2b3bc97asm9106026plb.13.2022.06.28.04.43.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jun 2022 04:43:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=gw3n5rkKreQm9gaPqnkkqV9cQuORrGSaBukz3VwVbu8=; b=FpVLv2HVjs//nngDVQ5eo4pHUwOxE7gBBEVPSAj/4a8qY+6nHJmY70bogXq4WL5I3j V94MZebL3u10XQRASxxeIIcIbz+H34ZOkJiprWbhtPV+3e6SHnZQHKi4lgP078r95gRk B2r588BJ49wZJuu2EFMyPse0VU3m+MjHFI0FjJ5kh35ABCil3fH/N1a1JPqhg0jABwx4 E80Bt68s/fMCAyJ7vAv4T9MX1Eeqkv86IU9xIOlGwurctqmVgEUN/pe7p+xiMQshKuOR iidNqgIaMXja768SEsJlgIg2J7JohHrDgZEpmtcRHtoWSS6BItVtgNvJSSwMNyXMMSAl xujg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=gw3n5rkKreQm9gaPqnkkqV9cQuORrGSaBukz3VwVbu8=; b=MVDBw0aYLDvzWVoogjflTWX5TMZDAVnUMveO7W0bZrLEt63EwGtu5BxU/8YWfrwZ4i wU0lb24V8+v0P6NJbGL1iUOJzcVYpx7gkAZVXwmN0WIlhnondcWQJFcZF3TtxB0nKm9Y zSQv6MJlkPHNggmHoMa6XNHWmqangzjS4nw68cwKgvse8wvWd6BpBoo4vvpluv14p7z5 aAFLlHQz+49UjQoSDYmR4X+BZWaK7nVK8cfv49F2+GpLDYH3gj81o4M/9c5lgW19Qpqg PxjhrTAZHqaGlNUQO/zV/f0frXh1gYUQabpS6SmuWbbSgANsgTB/78xEoF88oIim7sCp IYNQ== X-Gm-Message-State: AJIora9VcYebmlqv2nA0a6A8DSKEaIG9V6tCPEnISvZfvZhdOmSGQEzY zE7Cs3q1wmsVO23jMh/60igDwEuSEErGVA== X-Google-Smtp-Source: AGRyM1um3UvjeEK4Y5jDtkW4ykeeSzuIkYHf+kUvw+W8arKgRfchOYqft0VRl3e2unWXpqu6PV90EQ== X-Received: by 2002:a17:903:11c9:b0:16b:8293:c599 with SMTP id q9-20020a17090311c900b0016b8293c599mr4475718plh.136.1656416595270; Tue, 28 Jun 2022 04:43:15 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: jcmvbkbc@gmail.com Subject: [PATCH v5 1/2] target/xtensa: Use an exception for semihosting Date: Tue, 28 Jun 2022 17:13:06 +0530 Message-Id: <20220628114307.697943-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220628114307.697943-1-richard.henderson@linaro.org> References: <20220628114307.697943-1-richard.henderson@linaro.org> 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::62e; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62e.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=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-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1656417162790100001 Content-Type: text/plain; charset="utf-8" Within do_interrupt, we hold the iothread lock, which is required for Chardev access for the console, and for the round trip for use_gdb_syscalls(). Signed-off-by: Richard Henderson --- target/xtensa/cpu.h | 2 ++ target/xtensa/helper.h | 3 --- target/xtensa/exc_helper.c | 4 ++++ target/xtensa/translate.c | 3 ++- target/xtensa/xtensa-semi.c | 3 +-- 5 files changed, 9 insertions(+), 6 deletions(-) diff --git a/target/xtensa/cpu.h b/target/xtensa/cpu.h index 579adcb769..ea66895e7f 100644 --- a/target/xtensa/cpu.h +++ b/target/xtensa/cpu.h @@ -260,6 +260,7 @@ enum { EXC_USER, EXC_DOUBLE, EXC_DEBUG, + EXC_SEMIHOST, EXC_MAX }; =20 @@ -576,6 +577,7 @@ void xtensa_cpu_do_transaction_failed(CPUState *cs, hwa= ddr physaddr, vaddr addr, unsigned size, MMUAccessType access_= type, int mmu_idx, MemTxAttrs attrs, MemTxResult response, uintptr_t reta= ddr); +void xtensa_semihosting(CPUXtensaState *env); #endif void xtensa_cpu_dump_state(CPUState *cpu, FILE *f, int flags); hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); diff --git a/target/xtensa/helper.h b/target/xtensa/helper.h index ae938ceedb..531679cd86 100644 --- a/target/xtensa/helper.h +++ b/target/xtensa/helper.h @@ -11,9 +11,6 @@ DEF_HELPER_2(retw, void, env, i32) DEF_HELPER_3(window_check, noreturn, env, i32, i32) DEF_HELPER_1(restore_owb, void, env) DEF_HELPER_2(movsp, void, env, i32) -#ifndef CONFIG_USER_ONLY -DEF_HELPER_1(simcall, void, env) -#endif =20 #ifndef CONFIG_USER_ONLY DEF_HELPER_3(waiti, void, env, i32, i32) diff --git a/target/xtensa/exc_helper.c b/target/xtensa/exc_helper.c index d4823a65cd..d54a518875 100644 --- a/target/xtensa/exc_helper.c +++ b/target/xtensa/exc_helper.c @@ -219,6 +219,10 @@ void xtensa_cpu_do_interrupt(CPUState *cs) } =20 switch (cs->exception_index) { + case EXC_SEMIHOST: + xtensa_semihosting(env); + return; + case EXC_WINDOW_OVERFLOW4: case EXC_WINDOW_UNDERFLOW4: case EXC_WINDOW_OVERFLOW8: diff --git a/target/xtensa/translate.c b/target/xtensa/translate.c index 70e11eeb45..b65c8b8428 100644 --- a/target/xtensa/translate.c +++ b/target/xtensa/translate.c @@ -2377,7 +2377,8 @@ static void translate_simcall(DisasContext *dc, const= OpcodeArg arg[], { #ifndef CONFIG_USER_ONLY if (semihosting_enabled()) { - gen_helper_simcall(cpu_env); + tcg_gen_movi_i32(cpu_pc, dc->base.pc_next); + gen_exception(dc, EXC_SEMIHOST); } #endif } diff --git a/target/xtensa/xtensa-semi.c b/target/xtensa/xtensa-semi.c index fa21b7e11f..5375f106fc 100644 --- a/target/xtensa/xtensa-semi.c +++ b/target/xtensa/xtensa-semi.c @@ -28,7 +28,6 @@ #include "qemu/osdep.h" #include "cpu.h" #include "chardev/char-fe.h" -#include "exec/helper-proto.h" #include "semihosting/semihost.h" #include "qapi/error.h" #include "qemu/log.h" @@ -188,7 +187,7 @@ void xtensa_sim_open_console(Chardev *chr) sim_console =3D &console; } =20 -void HELPER(simcall)(CPUXtensaState *env) +void xtensa_semihosting(CPUXtensaState *env) { CPUState *cs =3D env_cpu(env); uint32_t *regs =3D env->regs; --=20 2.34.1