From nobody Tue Feb 10 18:44:04 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 166755609416110.652695126432036; Fri, 4 Nov 2022 03:01:34 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oqtVT-0002ma-VI; Fri, 04 Nov 2022 06:01:00 -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 1oqtVJ-0002Tg-R4 for qemu-devel@nongnu.org; Fri, 04 Nov 2022 06:00:51 -0400 Received: from mail.loongson.cn ([114.242.206.163] helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oqtVE-0000vJ-BK for qemu-devel@nongnu.org; Fri, 04 Nov 2022 06:00:48 -0400 Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8Bx37fG4mRjwHsEAA--.10403S3; Fri, 04 Nov 2022 18:00:38 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8AxPuDC4mRjYmUNAA--.37849S9; Fri, 04 Nov 2022 18:00:37 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, stefanha@gmail.com Subject: [PULL v2 7/9] target/loongarch: Fix raise_mmu_exception() set wrong exception_index Date: Fri, 4 Nov 2022 18:00:31 +0800 Message-Id: <20221104100033.3473980-8-gaosong@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221104100033.3473980-1-gaosong@loongson.cn> References: <20221104100033.3473980-1-gaosong@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8AxPuDC4mRjYmUNAA--.37849S9 X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjvJXoW7tr13JF4fWr1UGFWkJw45Awb_yoW8Cw13pF 9ruryUKr48JFWDAaykXa9YqFn8Xr47CF42ganaq3yFkw4aqr1jvF4kt3srKF1UJa1rX34I vF45Ar1jvF4rWaDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bn8Fc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4j6F4UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7 CjxVAFwI0_Cr1j6rxdM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E 6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6x8ErcxFaVAv8VWrMcvjeVCFs4IE7x kEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x0EwIxGrwCF04k20xvE74AGY7Cv 6cx26rWl4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x 8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1Y6r17MIIYrxkI7VAKI48JMIIF0xvE 2Ix0cI8IcVAFwI0_Xr0_Ar1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42 xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF 7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvj4RC_MaUUUUU 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=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: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1667556095511100003 Content-Type: text/plain; charset="utf-8" When the address is invalid address, We should set exception_index according to MMUAccessType, and EXCCODE_ADEF need't update badinstr. Otherwise, The system enters an infinite loop. e.g: run test.c on system mode test.c: #include void (*func)(int *); int main() { int i =3D 8; void *ptr =3D (void *)0x4000000000000000; func =3D ptr; func(&i); return 0; } Signed-off-by: Song Gao Reviewed-by: Richard Henderson Message-ID: <20221101073210.3934280-2-gaosong@loongson.cn> --- target/loongarch/cpu.c | 1 + target/loongarch/tlb_helper.c | 5 +++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c index b28aaed5ba..1512664214 100644 --- a/target/loongarch/cpu.c +++ b/target/loongarch/cpu.c @@ -177,6 +177,7 @@ static void loongarch_cpu_do_interrupt(CPUState *cs) } QEMU_FALLTHROUGH; case EXCCODE_PIF: + case EXCCODE_ADEF: cause =3D cs->exception_index; update_badinstr =3D 0; break; diff --git a/target/loongarch/tlb_helper.c b/target/loongarch/tlb_helper.c index 610b6d123c..d2f8fb0c60 100644 --- a/target/loongarch/tlb_helper.c +++ b/target/loongarch/tlb_helper.c @@ -229,7 +229,8 @@ static void raise_mmu_exception(CPULoongArchState *env,= target_ulong address, switch (tlb_error) { default: case TLBRET_BADADDR: - cs->exception_index =3D EXCCODE_ADEM; + cs->exception_index =3D access_type =3D=3D MMU_INST_FETCH + ? EXCCODE_ADEF : EXCCODE_ADEM; break; case TLBRET_NOMATCH: /* No TLB match for a mapped address */ @@ -643,7 +644,7 @@ bool loongarch_cpu_tlb_fill(CPUState *cs, vaddr address= , int size, CPULoongArchState *env =3D &cpu->env; hwaddr physical; int prot; - int ret =3D TLBRET_BADADDR; + int ret; =20 /* Data access */ ret =3D get_physical_address(env, &physical, &prot, address, --=20 2.31.1