From patchwork Thu Jan 20 12:20:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 12718830 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 24555C433F5 for ; Thu, 20 Jan 2022 16:14:59 +0000 (UTC) Received: from localhost ([::1]:33950 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nAa5Q-0004pd-7c for qemu-devel@archiver.kernel.org; Thu, 20 Jan 2022 11:14:58 -0500 Received: from eggs.gnu.org ([209.51.188.92]:39062) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nAWVa-0006Ln-UV; Thu, 20 Jan 2022 07:25:50 -0500 Received: from out28-147.mail.aliyun.com ([115.124.28.147]:35329) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nAWVY-0008Ec-Lo; Thu, 20 Jan 2022 07:25:42 -0500 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.07938297|-1; CH=green; DM=|CONTINUE|false|; DS=CONTINUE|ham_alarm|0.35604-0.000583857-0.643376; FP=0|0|0|0|0|-1|-1|-1; HT=ay29a033018047199; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=9; RT=8; SR=0; TI=SMTPD_---.MfxOzV3_1642681534; Received: from roman-VirtualBox.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.MfxOzV3_1642681534) by smtp.aliyun-inc.com(10.147.42.16); Thu, 20 Jan 2022 20:25:34 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v8 07/23] target/riscv: Extend pc for runtime pc write Date: Thu, 20 Jan 2022 20:20:34 +0800 Message-Id: <20220120122050.41546-8-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220120122050.41546-1-zhiwei_liu@c-sky.com> References: <20220120122050.41546-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=115.124.28.147; envelope-from=zhiwei_liu@c-sky.com; helo=out28-147.mail.aliyun.com 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=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: guoren@linux.alibaba.com, bin.meng@windriver.com, richard.henderson@linaro.org, palmer@dabbelt.com, Alistair Francis , LIU Zhiwei Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" In some cases, we must restore the guest PC to the address of the start of the TB, such as when the instruction counter hits zero. So extend pc register according to current xlen for these cases. Signed-off-by: LIU Zhiwei Reviewed-by: Richard Henderson Reviewed-by: Alistair Francis --- target/riscv/cpu.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 736cf1d4e7..eac5f7bf03 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -355,7 +355,12 @@ static void riscv_cpu_set_pc(CPUState *cs, vaddr value) { RISCVCPU *cpu = RISCV_CPU(cs); CPURISCVState *env = &cpu->env; - env->pc = value; + + if (env->xl == MXL_RV32) { + env->pc = (int32_t)value; + } else { + env->pc = value; + } } static void riscv_cpu_synchronize_from_tb(CPUState *cs, @@ -363,7 +368,13 @@ static void riscv_cpu_synchronize_from_tb(CPUState *cs, { RISCVCPU *cpu = RISCV_CPU(cs); CPURISCVState *env = &cpu->env; - env->pc = tb->pc; + RISCVMXL xl = FIELD_EX32(tb->flags, TB_FLAGS, XL); + + if (xl == MXL_RV32) { + env->pc = (int32_t)tb->pc; + } else { + env->pc = tb->pc; + } } static bool riscv_cpu_has_work(CPUState *cs) @@ -384,7 +395,12 @@ static bool riscv_cpu_has_work(CPUState *cs) void restore_state_to_opc(CPURISCVState *env, TranslationBlock *tb, target_ulong *data) { - env->pc = data[0]; + RISCVMXL xl = FIELD_EX32(tb->flags, TB_FLAGS, XL); + if (xl == MXL_RV32) { + env->pc = (int32_t)data[0]; + } else { + env->pc = data[0]; + } } static void riscv_cpu_reset(DeviceState *dev)