From mboxrd@z Thu Jan 1 00:00:00 1970 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 EB4D6C433EF for ; Thu, 11 Nov 2021 06:07:39 +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 A11F860F4F for ; Thu, 11 Nov 2021 06:07:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A11F860F4F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:48922 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ml3FK-0000y0-Pa for qemu-devel@archiver.kernel.org; Thu, 11 Nov 2021 01:07:38 -0500 Received: from eggs.gnu.org ([209.51.188.92]:48070) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ml38A-0002el-QL; Thu, 11 Nov 2021 01:00:16 -0500 Received: from out28-50.mail.aliyun.com ([115.124.28.50]:37033) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ml387-0003Ib-KU; Thu, 11 Nov 2021 01:00:14 -0500 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.07465442|-1; CH=green; DM=|CONTINUE|false|; DS=CONTINUE|ham_alarm|0.081855-0.000518238-0.917627; FP=12841426174990123083|2|2|6|0|-1|-1|-1; HT=ay29a033018047213; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=7; RT=7; SR=0; TI=SMTPD_---.Lr1AFTT_1636610405; Received: from roman-VirtualBox.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.Lr1AFTT_1636610405) by smtp.aliyun-inc.com(10.147.44.129); Thu, 11 Nov 2021 14:00:05 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v3 04/20] target/riscv: Extend pc for runtime pc write Date: Thu, 11 Nov 2021 13:57:44 +0800 Message-Id: <20211111055800.42672-5-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211111055800.42672-1-zhiwei_liu@c-sky.com> References: <20211111055800.42672-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: none client-ip=115.124.28.50; envelope-from=zhiwei_liu@c-sky.com; helo=out28-50.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_H4=0.001, RCVD_IN_MSPIKE_WL=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: palmer@dabbelt.com, richard.henderson@linaro.org, bin.meng@windriver.com, Alistair.Francis@wdc.com, 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 --- target/riscv/cpu.c | 22 +++++++++++++++++++--- target/riscv/cpu.h | 2 ++ target/riscv/cpu_helper.c | 2 +- 3 files changed, 22 insertions(+), 4 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index f812998123..0d2d175fa2 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -319,7 +319,12 @@ static void riscv_cpu_set_pc(CPUState *cs, vaddr value) { RISCVCPU *cpu = RISCV_CPU(cs); CPURISCVState *env = &cpu->env; - env->pc = value; + + if (cpu_get_xl(env) == MXL_RV32) { + env->pc = (int32_t)value; + } else { + env->pc = value; + } } static void riscv_cpu_synchronize_from_tb(CPUState *cs, @@ -327,7 +332,13 @@ 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) @@ -348,7 +359,12 @@ 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) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 0760c0af93..8befff0166 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -420,6 +420,8 @@ static inline RISCVMXL riscv_cpu_mxl(CPURISCVState *env) } #endif +RISCVMXL cpu_get_xl(CPURISCVState *env); + /* * A simplification for VLMAX * = (1 << LMUL) * VLEN / (8 * (1 << SEW)) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 4c048cc266..79aba9c880 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -35,7 +35,7 @@ int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch) #endif } -static RISCVMXL cpu_get_xl(CPURISCVState *env) +RISCVMXL cpu_get_xl(CPURISCVState *env) { #if defined(TARGET_RISCV32) return MXL_RV32; -- 2.25.1