From nobody Mon Feb 9 16:08:27 2026 Received: from mail-lj1-f177.google.com (mail-lj1-f177.google.com [209.85.208.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4E2A5288C3F for ; Sat, 8 Nov 2025 19:42:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762630950; cv=none; b=ZfBMXqG8pZohdHe7nyKSTAnWL4AFRXPonYMdrkY+Vx28F0zyMoxzj+nDWwtzIHFD4a0jOVDRAO48zbvcLiInqpRXMntyQTBBI6XWHSXS7piMecskt+lcyZ6g2ojeDLFXssJ/TYO6a3pmS9gId1MEz+k+FzfJgFPaCAXq0pkrQJo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762630950; c=relaxed/simple; bh=I+Jx6xBgH2zAab9TpH14gkeCgnP49zZ44qWiAaJu1NQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YauQddvWSoRMJ74K4MN3ASSkOEXyqOX6h8SYmpPKUBRYb1RkwmIBD+CP+7NCRJsc8qzcDs/Uy9E5ulj4LetkSw/+omsp34k/LWuXriDlixNvv1aSD+OZDtF8aDzCXIlCTqNQ2zmetFtimEvimV4RTAXrbAzgHgIxoFmDHo2QYB0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=b2vKKFne; arc=none smtp.client-ip=209.85.208.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="b2vKKFne" Received: by mail-lj1-f177.google.com with SMTP id 38308e7fff4ca-36295d53a10so14509911fa.0 for ; Sat, 08 Nov 2025 11:42:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1762630946; x=1763235746; darn=vger.kernel.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=1z9oJMGhMkRuSJL42xb+stRjYj/XQC2rSAWX+erznoA=; b=b2vKKFneSGDs+7qrbALd1DAUlRC+Owueuzvpzk/ueipWEdCTs71yESThyImYtx4vHQ ol4MbnVoNVBKeN34rSQ8CBCgOB00thACryQ/+/EUsfU2ZiI7Zag/6jhbn5dPjbuwwKtF PiooNSBj/YEGEkDBpZQKeP3lwgUaNT/rUf+GYMOEYO5KmhdPLCLxDFswR1ni0j7Cx3p3 GT/eJ2HF3Sa3h2sakm9ORen3KsdiyrOEi/k66Dx/CSms9ZjCDclMZxydSlSY2eA41TYI P+VnvAa7mp8Mbk0m8VPjA7nB7mHwfBg+xAtLgbPC3e55lkbKseRcGcDsbzwhCjMswUVC fpfQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762630946; x=1763235746; 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=1z9oJMGhMkRuSJL42xb+stRjYj/XQC2rSAWX+erznoA=; b=RLxQNmLn3bMIoMNbHFsAJNqFKkof5zS2+ARsw62gw5rLkr9b8VhaquU+7oqu8WSjbq wjkKbLZ+OxTFy7Bvk/MyXGN36PzTTrZE5EVdJFHMAypvI4ghvbLQMPVa3MFoN5QEgrW+ 30YOuiPNW9WVSYfcKhpbjzz580fYV065v9hUI9+fmgfygOa2jCjs83i2bXwjytxDKFHz WF1nNFRBrQp6o1MVHh8staRX74qEs2oJNeH0ulQmUEvZv1fcUaRsJ7rqTgPYkhkI3etT MgvKovFZNdzXWxr2qk3neZ0c+GdjO4v2QRKth2OdseIxcbNDz15uei7/JvJbObDx5Emn ffvA== X-Forwarded-Encrypted: i=1; AJvYcCVY5QEQlIc4P8J1Yg/JSkHB2gRry82FOzlUm5/10r3j2R9EHT/obhq80ec9C4+XqEVbm7zx3woCLOGbNYs=@vger.kernel.org X-Gm-Message-State: AOJu0YyrxfHcqhVnak0hyv11jbnKsJ7YHz2iC2GMYSMlf9NIucYUD8pR bS2mxnh6Ymmh/KG6mMP4balk88Po0/altxbGvM2ZXVQgkNe4KTRq+46Vcq39KAW6S9k= X-Gm-Gg: ASbGnctVAleO56VLOBAO/I7ShW+EV9S7OJC1RJUmT2MoGTEjmIQb8IuDM60uuRpE6zH O26BRYKAomxuxm8XaqC82HwUvRdKAoTHQI+LgkmWW9WTQyQB6SrZkoCNuyLj7PO6MLdpk5Q6tzN UFo48LaiPCzqXd3ZGPlo5ztVSm0EFZ0VXbr6rrmhSabYMMle58PxZ0q1NH6abVxlhRyK8KJt1xm I1rBoB726s4Wm7SDXRdFdXemSMWnKwBCpnd++NpL0LGuW6zHpfLmswVEv+ZYGxExsSr0paXxx4i d0vNRdQaA8G5Em8q7TFAscMqH96/JssWzu7vpXf23PhH4qPWF8qGJyLCdBqmaj84bKggTjKLRXy IXdMCA0YNTOQXt/BG3xb7BK+/36IIkFr+4BAIjiHge7BtrkzDpHwoeyP3U1DPRMeb39VE9fPJZp jl7Q== X-Google-Smtp-Source: AGHT+IFqruWPxQcVE5BSlkkAYUO3qtnystNc9jQjX4jqelXJHwKhoZh5DbK28uyPKpvnw5kWkw7ZbQ== X-Received: by 2002:a2e:8653:0:b0:37a:36be:7282 with SMTP id 38308e7fff4ca-37a7b23fac5mr7888391fa.41.1762630946307; Sat, 08 Nov 2025 11:42:26 -0800 (PST) Received: from curiosity ([5.188.167.4]) by smtp.googlemail.com with ESMTPSA id 38308e7fff4ca-37a5f0edac3sm22115421fa.38.2025.11.08.11.42.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 08 Nov 2025 11:42:24 -0800 (PST) From: Sergey Matyukevich To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Paul Walmsley , Palmer Dabbelt , Alexandre Ghiti , Oleg Nesterov , Shuah Khan , Thomas Huth , Charlie Jenkins , Andy Chiu , Samuel Holland , Joel Granados , Conor Dooley , Yong-Xuan Wang , Heiko Stuebner , Sergey Matyukevich Subject: [PATCH v4 3/9] selftests: riscv: verify initial vector state with ptrace Date: Sat, 8 Nov 2025 22:41:42 +0300 Message-ID: <20251108194207.1257866-4-geomatsi@gmail.com> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251108194207.1257866-1-geomatsi@gmail.com> References: <20251108194207.1257866-1-geomatsi@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a test case that attaches to a traced process immediately after its first executed vector instructions to verify the initial vector context. Signed-off-by: Sergey Matyukevich --- .../testing/selftests/riscv/vector/v_ptrace.c | 101 ++++++++++++++++++ 1 file changed, 101 insertions(+) diff --git a/tools/testing/selftests/riscv/vector/v_ptrace.c b/tools/testin= g/selftests/riscv/vector/v_ptrace.c index 6a4b5a2ab4a2..9fea29f7b686 100644 --- a/tools/testing/selftests/riscv/vector/v_ptrace.c +++ b/tools/testing/selftests/riscv/vector/v_ptrace.c @@ -82,4 +82,105 @@ TEST(ptrace_v_not_enabled) } } =20 +TEST(ptrace_v_early_debug) +{ + static volatile unsigned long vstart; + static volatile unsigned long vtype; + static volatile unsigned long vlenb; + static volatile unsigned long vcsr; + static volatile unsigned long vl; + pid_t pid; + + if (!is_vector_supported()) + SKIP(return, "Vector not supported"); + + chld_lock =3D 1; + pid =3D fork(); + ASSERT_LE(0, pid) + TH_LOG("fork: %m"); + + if (pid =3D=3D 0) { + while (chld_lock =3D=3D 1) + asm volatile("" : : "g"(chld_lock) : "memory"); + + asm volatile("csrr %[vstart], vstart" : [vstart] "=3Dr"(vstart)); + asm volatile("csrr %[vl], vl" : [vl] "=3Dr"(vl)); + asm volatile("csrr %[vtype], vtype" : [vtype] "=3Dr"(vtype)); + asm volatile("csrr %[vcsr], vcsr" : [vcsr] "=3Dr"(vcsr)); + asm volatile("csrr %[vlenb], vlenb" : [vlenb] "=3Dr"(vlenb)); + + asm volatile ("ebreak" : : : ); + } else { + struct __riscv_v_regset_state *regset_data; + unsigned long vstart_csr; + unsigned long vlenb_csr; + unsigned long vtype_csr; + unsigned long vcsr_csr; + unsigned long vl_csr; + size_t regset_size; + struct iovec iov; + int status; + + /* attach */ + + ASSERT_EQ(0, ptrace(PTRACE_ATTACH, pid, NULL, NULL)); + ASSERT_EQ(pid, waitpid(pid, &status, 0)); + ASSERT_TRUE(WIFSTOPPED(status)); + + /* unlock */ + + ASSERT_EQ(0, ptrace(PTRACE_POKEDATA, pid, &chld_lock, 0)); + + /* resume and wait for ebreak */ + + ASSERT_EQ(0, ptrace(PTRACE_CONT, pid, NULL, NULL)); + ASSERT_EQ(pid, waitpid(pid, &status, 0)); + ASSERT_TRUE(WIFSTOPPED(status)); + + /* read tracee vector csr regs using ptrace PEEKDATA */ + + errno =3D 0; + vstart_csr =3D ptrace(PTRACE_PEEKDATA, pid, &vstart, NULL); + ASSERT_FALSE((errno !=3D 0) && (vstart_csr =3D=3D -1)); + + errno =3D 0; + vl_csr =3D ptrace(PTRACE_PEEKDATA, pid, &vl, NULL); + ASSERT_FALSE((errno !=3D 0) && (vl_csr =3D=3D -1)); + + errno =3D 0; + vtype_csr =3D ptrace(PTRACE_PEEKDATA, pid, &vtype, NULL); + ASSERT_FALSE((errno !=3D 0) && (vtype_csr =3D=3D -1)); + + errno =3D 0; + vcsr_csr =3D ptrace(PTRACE_PEEKDATA, pid, &vcsr, NULL); + ASSERT_FALSE((errno !=3D 0) && (vcsr_csr =3D=3D -1)); + + errno =3D 0; + vlenb_csr =3D ptrace(PTRACE_PEEKDATA, pid, &vlenb, NULL); + ASSERT_FALSE((errno !=3D 0) && (vlenb_csr =3D=3D -1)); + + /* read tracee csr regs using ptrace GETREGSET */ + + regset_size =3D sizeof(*regset_data) + vlenb_csr * 32; + regset_data =3D calloc(1, regset_size); + + iov.iov_base =3D regset_data; + iov.iov_len =3D regset_size; + + ASSERT_EQ(0, ptrace(PTRACE_GETREGSET, pid, NT_RISCV_VECTOR, &iov)); + + /* compare */ + + EXPECT_EQ(vstart_csr, regset_data->vstart); + EXPECT_EQ(vtype_csr, regset_data->vtype); + EXPECT_EQ(vlenb_csr, regset_data->vlenb); + EXPECT_EQ(vcsr_csr, regset_data->vcsr); + EXPECT_EQ(vl_csr, regset_data->vl); + + /* cleanup */ + + ASSERT_EQ(0, kill(pid, SIGKILL)); + } +} + TEST_HARNESS_MAIN --=20 2.51.0