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[114.35.142.126]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-35bba4f2321sm788462a91.2.2026.03.17.18.38.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Mar 2026 18:38:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; t=1773797894; x=1774402694; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=65n1YjdwrmfnAbTxt9/zviUKHs6YsAptXaobJf5YYGI=; b=FF8zCqloyivtwm+/QNV+/IzGAeub11MFcMnSsX4dNc/p/KkjVyKB61AiXndTwdQGO9 +tuFKpisesBZQT3LDG2gf/DW2CDvGPlTG7MFzkwkYbwpAngHIhirX6PLAkYsK5v6ny+D IP6R1HJx4dN0GrHlULRAIQkyaR3KKkfKJez0bc033GEORwiUks7aDwXeKjbfIu3sY/SO FOf4/rlL6SHH9z7GD/e6SSGZhWVDggCKiSYXH0LxLN9hJcn+6ABnpIKsyt5Xl3EeeQk+ i/EAg9oTVIRDI5bp8VZqRFsTwepeswWsqa+JtD8Mrma+7mPQYq0AL7hdj3Az+vTH08nr ZbVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773797894; x=1774402694; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=65n1YjdwrmfnAbTxt9/zviUKHs6YsAptXaobJf5YYGI=; b=becq9nq6URZXEe3KztPCz4OcrFyyG8FaTLE4H57/asTGGOeLVjKGxlgyJWmEr7KTF2 suvhvIgjpiLiQ4jSTJMae4WUkKFInmfbW7/pRNFB+/ZInRczgIir6kyZbp3KR3msLdOr QaFiVJNLwbOIVDYNFACgo16hUXhxkfS+EhYaJMjJPmfZEpGLDeVMbpQmNlaPEmB2MW42 7dpmtNebqF71s1aBJdDDwi3JQK+vDFFTZI3frUjLRnuR2kXDhMJECqnKVV1AVH0fl65R 7IX7icdzTRxd0iYNU24alu+uDiySex8JprZSvIbqbmH8nXslKUb6FDLkTQXAMhVfMBzU Wqgw== X-Gm-Message-State: AOJu0YzHlnK45/l2Gfy9duaeYo2DPbHW0lR+2vzlQoRRXTfIHlNjiLfG YDaOcT3svFEfzttEk7T0FJ7RJ+LSr5JgZEophbDumAq7XuNVLKM1zOYhBd4ApZltux10Zm91OoR oqPNQY1uBcS/mL8PzE0z6NxULv7mtlAyOvdAHzg4Yh3Gh49pD2R2yUwCJkFFtEXfmPqq09IXGxn UkfUjg+WbU2/3WPBAo57u2dvn+1ZVCB6N58z5RW4Pb/A== X-Gm-Gg: ATEYQzyrbWV0d++GjoPetOhb1mvZoFkRsavZJ18Xqops7B9IjjNyqDnw6xnC3vFsAD7 DPhCQWkcRdsWV3Qexsa7ER5bynqWRghP+PhQmSuocMvEbgfeXWLxwPC+a9qlxz0dcP8lbOGzH5T /bTV66PK3+LhLOIYXgdTbrHWb5KJn1CSy8xvaeBgRBZuqXMqz2yM0xnBlei7ryTOGXDyKDqVIMd fmWzF25UCDSk47pW/A6lgaMM5OI6zJX3uVZK1z60zeaTztR12l9AHoyhcwq8rtxWPJTT1ZYB5FG k3yzwBgsxB1adxA55WzoZYra2aYtCHTRY/gobZumP3CdaGaJBt5XHnFlKOcQVx7W6lm2UaFGnTY 3w6pledek9shZ2BvlDnSgPH/R9iqpoiMoVooZ8rI6mqIk6WfEydZKt6GUzfWfyoCUX8M8tgzOeE cl0pytIIY/5ysA4phPJGm+r0+jr17RU04tMHjGqBmbMml+y00rZL6tiFE8sF522JSt8c8Wv1Ote rjTLN+aBDk6IYzr55IDfieDmuA= X-Received: by 2002:a17:90b:4fc5:b0:341:88d5:a74e with SMTP id 98e67ed59e1d1-35bb9f2a19amr1460133a91.29.1773797893828; Tue, 17 Mar 2026 18:38:13 -0700 (PDT) From: Max Chou To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: Palmer Dabbelt , Alistair Francis , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , Chao Liu , Max Chou Subject: [PATCH 1/2] target/riscv: rvv: Fix missing flags merge in probe_pages for cross-page accesses Date: Wed, 18 Mar 2026 09:38:04 +0800 Message-ID: <20260318013805.1920377-2-max.chou@sifive.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260318013805.1920377-1-max.chou@sifive.com> References: <20260318013805.1920377-1-max.chou@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2607:f8b0:4864:20::1033; envelope-from=max.chou@sifive.com; helo=mail-pj1-x1033.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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-ZohoMail-DKIM: pass (identity @sifive.com) X-ZM-MESSAGEID: 1773797902472154100 Content-Type: text/plain; charset="utf-8" When probe_pages probes a memory region that spans two pages, it calls probe_access_flags twice - once for each page. However, the flags from the second page probe were overwriting the flags from the first page instead of being merged together. Signed-off-by: Max Chou Reviewed-by: Alistair Francis --- target/riscv/vector_helper.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c index 3334662dcd..a74ce70943 100644 --- a/target/riscv/vector_helper.c +++ b/target/riscv/vector_helper.c @@ -265,9 +265,9 @@ static void probe_pages(CPURISCVState *env, target_ulon= g addr, target_ulong len, addr +=3D curlen; curlen =3D len - curlen; if (flags !=3D NULL) { - *flags =3D probe_access_flags(env, adjust_addr(env, addr), cur= len, - access_type, mmu_index, nonfault, - host, ra); + *flags |=3D probe_access_flags(env, adjust_addr(env, addr), cu= rlen, + access_type, mmu_index, nonfault, + host, ra); } else { probe_access(env, adjust_addr(env, addr), curlen, access_type, mmu_index, ra); @@ -275,7 +275,6 @@ static void probe_pages(CPURISCVState *env, target_ulon= g addr, target_ulong len, } } =20 - static inline void vext_set_elem_mask(void *v0, int index, uint8_t value) { --=20 2.43.7 From nobody Mon Apr 6 20:30:39 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=reject dis=none) header.from=sifive.com ARC-Seal: i=1; a=rsa-sha256; t=1773797908; cv=none; d=zohomail.com; s=zohoarc; b=cNbC9gkLt4SYKHuOj7IfrrzY+f7FIjpqKebU/nYhPDhXU4bGVVdfNHg9X3oHXSs0uXKeVuVdSm2MtYTBpUJ62erHyLURdjPscWBYG2bEPKwe0ebqOKeBMPs0oOx/LXjSUpe+il+g/AuQbw9X0e/54LWjgHX7nd72Q/vakn3Pqb8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1773797908; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=hAi/I+xZNYQnUCvv34er/GB0MqxllKg2X616+n0zgEo=; b=ZkOK3sXZsuE8Jn1zfkyZVu4x50xTWZ7vzpoomKj7eHwMaJV8ZUqOybMmdUGlbtgzHqZtuQ1ja1WAkDz86UeSThsZFm6nIvVHlSBgkvBkAuHoXZ1CtMTFYNJP9hnUprKQQq3mns/Z+iDMrug6Rvm2wEcoUrbFUTZDpGt9gDABjtE= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1773797908749224.6102506123059; Tue, 17 Mar 2026 18:38:28 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w2frc-0000s1-HB; Tue, 17 Mar 2026 21:38:24 -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 1w2frX-0000pe-9p for qemu-devel@nongnu.org; Tue, 17 Mar 2026 21:38:19 -0400 Received: from mail-pj1-x1029.google.com ([2607:f8b0:4864:20::1029]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1w2frV-0001tE-Lv for qemu-devel@nongnu.org; Tue, 17 Mar 2026 21:38:19 -0400 Received: by mail-pj1-x1029.google.com with SMTP id 98e67ed59e1d1-35a1230c60eso3299345a91.3 for ; Tue, 17 Mar 2026 18:38:17 -0700 (PDT) Received: from duncan.localdomain (114-35-142-126.hinet-ip.hinet.net. [114.35.142.126]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-35bba4f2321sm788462a91.2.2026.03.17.18.38.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Mar 2026 18:38:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; t=1773797896; x=1774402696; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hAi/I+xZNYQnUCvv34er/GB0MqxllKg2X616+n0zgEo=; b=GxpsitzF/6XL7narFvGhDZl9Ob+KwRNiFtcj/MHsc3lbmHHA2DNmNa9eLGxIbiOR9C Bhxm+lg+1YD/VAucilkKuUDIjispuh1nOck/+/WEd9Qtm28UEyTvHpnvAsgB7tY/8ZX5 nmGT12CUr6LYRyKwMwdGIqcW63Ej17vc14ECdPOT6Op/gIeJxrlmdKTg/foNtdTUv8bd /J9GmV+le7pbpD/aonAIo92QInMIlH6phpURya8GfAeHiUOEvVCSu+FqG7eXAkR/FSYj cDCjNw0hY1u30AnIriuEGwNtS93+o+JeGAcJ0NJTVG307AqioYElABMJsWS3ZIprHAJU pScw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773797896; x=1774402696; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=hAi/I+xZNYQnUCvv34er/GB0MqxllKg2X616+n0zgEo=; b=V7Gw6OvYcLnDaGclvjIBkNCFdclef6AFCMKCb5dmwtCR48+nWWyRzLOGaqp74Ghfw1 wwZABgfX8bhOW+99aXJ1hXygbmQFGsO6QeVWlavMweTFOxy0vN3PnX1yYZ1lHWrxeUy0 Tquuel1R5oKyaVSwB1JEjUIwL9j01fc6R4PVP3hWRZLZuI1PWGaKG0wjZHqffuSy3Ncz DUBv9QDH9nZ9GrR0M/hIh9grmyb/nXJX6Qfx/9hnD3AK3JeenkDqGxeMq4U97apa2YQQ fIDToese8MI8HiD570xNSSU17rCm7nX7vTve2K+gH4tOahlENynAobf5gLgzxWjNZuUC VZ8w== X-Gm-Message-State: AOJu0Yz1mEGqRTgoH/3+SwLLgCCkpktlEhCTiwxuZl2nI8hnkc4eeW6C h4ioo8VE7TgRs7wM0JOkckDDOs/lyJYPW1xWyAJRRnQPFvJhnmIQE+ln5itkDyDRWzh7JLCGFdI FQ0uvObU3dEbR303UjL5s1C/s8Agih/mJherUw6irOkxfDgOQB1kRjsVl+suLtNi2a/+1dVSs6L aG9IeCdTGThdhTbHS52A9O3I1MC1DcJ8fWu4ZW8j6ePQ== X-Gm-Gg: ATEYQzx20PORMi39woZ0dcp68hfMZyAp877MIOHrTyY+AoRAszvZRHpbSWN614D12Qw z0cOHWe0vU7R/UpoCBapbYl+rlQp072mxDeU4gLdSqPFaCkKn24ib0gtTDcwY7pYn+UeJ+5r0lj KKSMOylLhhaa7y++s7IBbMG/1KQeNMi167lN6Vz9DVNskBCQTd4QMXEl9VupTc4bwwwFn7nSNfL r+7+YEqV5GYJHFpeYz0IxnSQ6f3NxyTnr4f+yRra8Ls6KzGbpk4WsXb8CCB7bDXR0jqml+8gFex JKfWxbcRWW5uExiPI88HtSY4wwt5+1FGU9VIPFL7peiCt05a7By0SPaN7N3ziUm5+XfISBMfraD vCm49MBGx4nrnA73oLNrqAGux0kKOVdJybvZZZ3qd+kE0PSy3aypuqGSf5YB4bf+RMHvmxwwBym +gzYB5Vc7csRCEtiXlHk4EmnxahUvrYlMNJMDab5XT8PDCv1J17dsqE1YNPunpEAhk1BnQw8RJH r+9v++smvokbVe6eBR0dkfxgcI= X-Received: by 2002:a17:90b:3dc6:b0:359:87a8:e65c with SMTP id 98e67ed59e1d1-35bb9ef6088mr1194601a91.17.1773797896007; Tue, 17 Mar 2026 18:38:16 -0700 (PDT) From: Max Chou To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: Palmer Dabbelt , Alistair Francis , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , Chao Liu , Max Chou Subject: [PATCH 2/2] target/riscv: rvv: Fix page probe issues in vext_ldff Date: Wed, 18 Mar 2026 09:38:05 +0800 Message-ID: <20260318013805.1920377-3-max.chou@sifive.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260318013805.1920377-1-max.chou@sifive.com> References: <20260318013805.1920377-1-max.chou@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2607:f8b0:4864:20::1029; envelope-from=max.chou@sifive.com; helo=mail-pj1-x1029.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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-ZohoMail-DKIM: pass (identity @sifive.com) X-ZM-MESSAGEID: 1773797910383154100 Content-Type: text/plain; charset="utf-8" Commit 17288e38bebf ("optimize the memory probing for vector fault-only-first loads") introduced an optimization that moved from per-element probing to a fast-path broad probe. Unfortunately it introduced following bugs in cross-page handling: - Wrong condition for second page probing: checked "env->vl > elems" instead of "env->vl > elems + env->vstart", failing to account for the vstart offset. - Incorrect second page address calculation: used "addr + (elems << log2_esz)" instead of "addr + page_split". For segment loads (nf > 1), this would probe the wrong address,not at the page boundary. - Wrong second page probe size: used "elems * msize" (the first page size) instead of calculating the remaining size as "(env->vl - env->vstart) * msize - page_split". This would probe too little memory and could miss faults. This commit fixes these bugs by leveraging the probe_pages helper which automatically handles cross-page memory accesses correctly. Fixes: 17288e38bebf ("optimize the memory probing for vector fault-only-fir= st loads.") Signed-off-by: Max Chou Acked-by: Alistair Francis --- target/riscv/vector_helper.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c index a74ce70943..f038997095 100644 --- a/target/riscv/vector_helper.c +++ b/target/riscv/vector_helper.c @@ -772,9 +772,9 @@ vext_ldff(void *vd, void *v0, target_ulong base, CPURIS= CVState *env, uint32_t esz =3D 1 << log2_esz; uint32_t msize =3D nf * esz; uint32_t vma =3D vext_vma(desc); - target_ulong addr, addr_probe, addr_i, offset, remain, page_split, ele= ms; + target_ulong addr, addr_i, offset, remain, page_split, elems; int mmu_index =3D riscv_env_mmu_index(env, false); - int flags, probe_flags; + int flags; void *host; =20 VSTART_CHECK_EARLY_EXIT(env, env->vl); @@ -788,16 +788,8 @@ vext_ldff(void *vd, void *v0, target_ulong base, CPURI= SCVState *env, } =20 /* Check page permission/pmp/watchpoint/etc. */ - probe_pages(env, addr, elems * msize, ra, MMU_DATA_LOAD, mmu_index, &h= ost, - &flags, true); - - /* If we are crossing a page check also the second page. */ - if (env->vl > elems) { - addr_probe =3D addr + (elems << log2_esz); - probe_pages(env, addr_probe, elems * msize, ra, MMU_DATA_LOAD, - mmu_index, &host, &probe_flags, true); - flags |=3D probe_flags; - } + probe_pages(env, addr, (env->vl - env->vstart) * msize, ra, MMU_DATA_L= OAD, + mmu_index, &host, &flags, true); =20 if (flags & ~TLB_WATCHPOINT) { /* probe every access */ --=20 2.43.7