From nobody Sat Nov 15 00:07:22 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 175920461937863.86735985439975; Mon, 29 Sep 2025 20:56:59 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v3RR2-0000wk-RT; Mon, 29 Sep 2025 23:53:52 -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 1v3RR0-0000w0-Qi for qemu-devel@nongnu.org; Mon, 29 Sep 2025 23:53:50 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v3RQr-0001ql-4S for qemu-devel@nongnu.org; Mon, 29 Sep 2025 23:53:50 -0400 Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8Bx3tI_VNtoxGsQAA--.34469S3; Tue, 30 Sep 2025 11:53:35 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJBxC8E8VNtoak+_AA--.40492S6; Tue, 30 Sep 2025 11:53:34 +0800 (CST) From: Bibo Mao To: Song Gao , Richard Henderson Cc: Jiaxun Yang , qemu-devel@nongnu.org Subject: [PATCH v4 04/13] target/loongarch: Add function sptw_prepare_tlb before adding tlb entry Date: Tue, 30 Sep 2025 11:53:23 +0800 Message-Id: <20250930035332.2609520-5-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250930035332.2609520-1-maobibo@loongson.cn> References: <20250930035332.2609520-1-maobibo@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJBxC8E8VNtoak+_AA--.40492S6 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: 1759204620752116600 Content-Type: text/plain; charset="utf-8" With software page table walker, tlb entry comes from CSR registers. however with hardware page table walker, tlb entry comes from page table entry information directly, TLB CSR registers are not necessary. Here add function sptw_prepare_context(), get tlb entry information from TLB CSR registers. Signed-off-by: Bibo Mao --- target/loongarch/cpu-mmu.h | 1 + target/loongarch/tcg/tlb_helper.c | 23 +++++++++++++++++++++-- 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/target/loongarch/cpu-mmu.h b/target/loongarch/cpu-mmu.h index bc3700f93d..865800fc0a 100644 --- a/target/loongarch/cpu-mmu.h +++ b/target/loongarch/cpu-mmu.h @@ -25,6 +25,7 @@ typedef struct MMUContext { hwaddr physical; int ps; /* page size shift */ int prot; + uint64_t pte_buddy[2]; } MMUContext; =20 static inline bool cpu_has_ptw(CPULoongArchState *env) diff --git a/target/loongarch/tcg/tlb_helper.c b/target/loongarch/tcg/tlb_h= elper.c index b1092d3aff..01ade068ab 100644 --- a/target/loongarch/tcg/tlb_helper.c +++ b/target/loongarch/tcg/tlb_helper.c @@ -157,10 +157,10 @@ static void invalidate_tlb(CPULoongArchState *env, in= t index) invalidate_tlb_entry(env, index); } =20 -static void fill_tlb_entry(CPULoongArchState *env, LoongArchTLB *tlb) +/* Prepare tlb entry information in software PTW mode */ +static void sptw_prepare_context(CPULoongArchState *env, MMUContext *conte= xt) { uint64_t lo0, lo1, csr_vppn; - uint16_t csr_asid; uint8_t csr_ps; =20 if (FIELD_EX64(env->CSR_TLBRERA, CSR_TLBRERA, ISTLBR)) { @@ -183,6 +183,25 @@ static void fill_tlb_entry(CPULoongArchState *env, Loo= ngArchTLB *tlb) lo1 =3D env->CSR_TLBELO1; } =20 + context->ps =3D csr_ps; + context->addr =3D csr_vppn << R_TLB_MISC_VPPN_SHIFT; + context->pte_buddy[0] =3D lo0; + context->pte_buddy[1] =3D lo1; +} + +static void fill_tlb_entry(CPULoongArchState *env, LoongArchTLB *tlb) +{ + uint64_t lo0, lo1, csr_vppn; + uint16_t csr_asid; + uint8_t csr_ps; + MMUContext context; + + sptw_prepare_context(env, &context); + csr_vppn =3D context.addr >> R_TLB_MISC_VPPN_SHIFT; + csr_ps =3D context.ps; + lo0 =3D context.pte_buddy[0]; + lo1 =3D context.pte_buddy[1]; + /* Store page size in field PS */ tlb->tlb_misc =3D FIELD_DP64(tlb->tlb_misc, TLB_MISC, PS, csr_ps); tlb->tlb_misc =3D FIELD_DP64(tlb->tlb_misc, TLB_MISC, VPPN, csr_vppn); --=20 2.39.3