From nobody Fri Nov 14 19:47:01 2025 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 1761221313156638.5009213602094; Thu, 23 Oct 2025 05:08:33 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vBu6m-00069D-Rh; Thu, 23 Oct 2025 08:07:57 -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 1vBu6P-000666-Io for qemu-devel@nongnu.org; Thu, 23 Oct 2025 08:07:36 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vBu6I-0004vV-LZ for qemu-devel@nongnu.org; Thu, 23 Oct 2025 08:07:33 -0400 Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8Dxvr97Gvpob70ZAA--.53875S3; Thu, 23 Oct 2025 20:07:23 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJDx_8NuGvporJkDAQ--.47140S11; Thu, 23 Oct 2025 20:07:22 +0800 (CST) From: Bibo Mao To: qemu-devel@nongnu.org Cc: Song Gao Subject: [PULL 09/14] target/loongarch: Move last PTE lookup into page table walker loop Date: Thu, 23 Oct 2025 20:07:05 +0800 Message-Id: <20251023120710.3086556-10-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20251023120710.3086556-1-maobibo@loongson.cn> References: <20251023120710.3086556-1-maobibo@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJDx_8NuGvporJkDAQ--.47140S11 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== 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=maobibo@loongson.cn; helo=mail.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, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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-ZM-MESSAGEID: 1761221317964154100 Content-Type: text/plain; charset="utf-8" The last PTE lookup sentence is much similiar with the whole page table walker loop, move it into the whole loop. Signed-off-by: Bibo Mao Reviewed-by: Song Gao --- target/loongarch/cpu_helper.c | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/target/loongarch/cpu_helper.c b/target/loongarch/cpu_helper.c index 8388bfb782..520fd74b2b 100644 --- a/target/loongarch/cpu_helper.c +++ b/target/loongarch/cpu_helper.c @@ -124,7 +124,7 @@ static TLBRet loongarch_ptw(CPULoongArchState *env, MMU= Context *context, } base &=3D TARGET_PHYS_MASK; =20 - for (level =3D 4; level > 0; level--) { + for (level =3D 4; level >=3D 0; level--) { get_dir_base_width(env, &dir_base, &dir_width, level); =20 if (dir_width =3D=3D 0) { @@ -135,17 +135,19 @@ static TLBRet loongarch_ptw(CPULoongArchState *env, M= MUContext *context, index =3D (address >> dir_base) & ((1 << dir_width) - 1); phys =3D base | index << 3; base =3D ldq_phys(cs->as, phys); - if (FIELD_EX64(base, TLBENTRY, HUGE)) { - /* base is a huge pte */ - break; - } else { - /* Discard high bits with page directory table */ - base &=3D TARGET_PHYS_MASK; + if (level) { + if (FIELD_EX64(base, TLBENTRY, HUGE)) { + /* base is a huge pte */ + break; + } else { + /* Discard high bits with page directory table */ + base &=3D TARGET_PHYS_MASK; + } } } =20 /* pte */ - if (FIELD_EX64(base, TLBENTRY, HUGE)) { + if (level > 0) { /* Huge Page. base is pte */ base =3D FIELD_DP64(base, TLBENTRY, LEVEL, 0); base =3D FIELD_DP64(base, TLBENTRY, HUGE, 0); @@ -153,12 +155,6 @@ static TLBRet loongarch_ptw(CPULoongArchState *env, MM= UContext *context, base =3D FIELD_DP64(base, TLBENTRY, HGLOBAL, 0); base =3D FIELD_DP64(base, TLBENTRY, G, 1); } - } else { - /* Normal Page. base points to pte */ - get_dir_base_width(env, &dir_base, &dir_width, 0); - index =3D (address >> dir_base) & ((1 << dir_width) - 1); - phys =3D base | index << 3; - base =3D ldq_phys(cs->as, phys); } =20 context->ps =3D dir_base; --=20 2.43.5