From nobody Fri Nov 14 21:03:10 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 1760579560315265.838036180823; Wed, 15 Oct 2025 18:52:40 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v9D8t-0002VM-Ah; Wed, 15 Oct 2025 21:50:59 -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 1v9D8d-0002SI-0O for qemu-devel@nongnu.org; Wed, 15 Oct 2025 21:50:43 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v9D8X-0001Ts-QR for qemu-devel@nongnu.org; Wed, 15 Oct 2025 21:50:42 -0400 Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8CxHvBnT_BonbEWAA--.48708S3; Thu, 16 Oct 2025 09:50:31 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJCxH8JjT_BoAY3oAA--.64734S10; Thu, 16 Oct 2025 09:50:31 +0800 (CST) From: Bibo Mao To: Song Gao , Richard Henderson Cc: Jiaxun Yang , qemu-devel@nongnu.org Subject: [PATCH v5 08/14] target/loongarch: Reserve higher 48 bit PTE attribute with huge page Date: Thu, 16 Oct 2025 09:50:21 +0800 Message-Id: <20251016015027.1695116-9-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20251016015027.1695116-1-maobibo@loongson.cn> References: <20251016015027.1695116-1-maobibo@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJCxH8JjT_BoAY3oAA--.64734S10 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: 1760579562331158500 Content-Type: text/plain; charset="utf-8" With PTE entry, high bit 48-63 is valid HW bit for PTE attribute, for example bit 63 is RPLV and bit 62 is NX. With page directory table, it is physical address of page table from view of HW, so high bit 48-63 need be discarded. Here reverve high bit 48-63 with huge page since it is PTE entry, and only discard it with page directory table. Signed-off-by: Bibo Mao --- target/loongarch/cpu_helper.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/target/loongarch/cpu_helper.c b/target/loongarch/cpu_helper.c index 8fc596763d..07087c68b8 100644 --- a/target/loongarch/cpu_helper.c +++ b/target/loongarch/cpu_helper.c @@ -134,10 +134,13 @@ static TLBRet loongarch_ptw(CPULoongArchState *env, M= MUContext *context, /* get next level page directory */ index =3D (address >> dir_base) & ((1 << dir_width) - 1); phys =3D base | index << 3; - base =3D ldq_phys(cs->as, phys) & TARGET_PHYS_MASK; + 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; } } =20 --=20 2.39.3