From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 901F8CCD185 for ; Tue, 7 Oct 2025 11:59:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=00qeJJUrzGwHWzHODFlFe4Bu9aJ7WUWnCjq8TYqoHQ4=; b=Iedh+XCdeUkHdk Xbq0Ri+PwL7+LN2YQEBkNjU1gu/QsFMzLFz6onH+VEX5yC3j39Pd23DJvKfRcEN9wL5i/iZrzB/pR mglWLO5Di/mTAu3M1pRjs94Zw7/VauKX2fFMk+GKHdwu98dn4SeKeO5xamci8Dd8ZzOOOSU3kKEIy ZzNyWDpoMBEFx8/2z3l8eRDTxMk+TkJ7IjZG+ArLBUaQKXpIv0KXUrWknQq0Q3qdvfCPRZf4PqYXI mDlKp1NFHaByBFQlAvCqojAMu3lOCTlcilvDv6OAvE1Y1JEH2+0no4unUxQj7fVZ+qTWYm2HwUZn3 JjZ4poKompopbmbVsBsA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v66LJ-00000001w5B-2RP0; Tue, 07 Oct 2025 11:58:57 +0000 Received: from mail-lf1-x12f.google.com ([2a00:1450:4864:20::12f]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v66LH-00000001w1e-01lx for linux-riscv@lists.infradead.org; Tue, 07 Oct 2025 11:58:56 +0000 Received: by mail-lf1-x12f.google.com with SMTP id 2adb3069b0e04-57d5ccd73dfso6726684e87.0 for ; Tue, 07 Oct 2025 04:58:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1759838333; x=1760443133; darn=lists.infradead.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=DHT1PRp2JY0IGazIqjL1tLWH/amjUJ0aFr/0p5QGBFQ=; b=iMxlt2Uk/E6O0I+IBNUJROpvSCJ6rD5vxJ5zOvJRjDEq/aFAZWVaj6e/I+GeUVyF5k R5SADQR/7dZEq4JnmmBUO0/anc2uY31aC0glnYHnz4E6oQox2UBUdOtdPhU326r7faTa UvjEkLu/jeNG0V093mxAl/A9u71+pet1C4ILY+YEeexfjaaogVaD29kYKfFia3QLhGkb aIafd0k5HFNLtELdfk7r9OWuvQVan1klJRMc1H3tnltJfng56Pzc38RV8m9KFCK8It/F g1LYzNPsh1ILmdRv+1lKTfU8s3LeYMzlxEkiH9L48oL2OtvhMT0ili0TP4NMaCkmOtC9 znVA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759838333; x=1760443133; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=DHT1PRp2JY0IGazIqjL1tLWH/amjUJ0aFr/0p5QGBFQ=; b=c/baa1TpVyKRiVJEnNs4z2WklFGh1aqdS1BeQDxMgFjs/3XSwVSqbfuJTm4FdZ4Uq5 nr/VQPoFrG9hwbi+L7exRX8pdgqRZSk/UR4sMk8ZLhyW/IalXxYtVv9cJW8CDR/ah0d3 qNlZ1SMVkjY4eme3vWLdqRzwwO1XSKSi9jStoEHDaBMNEPk/dVbH+yMHNxiDXDpq7cH4 7i9uSg0tm8HMZLRHQTqDAJ1xNQztfB5BNWD2UACeRdAb46iQSqMQfP1EyV/KCgbAs/NS UaavdWYjmR2XfdZaLK702ddozuDIVOPferbT/tEinuBwJUa9FY76nsbgylJ+yWY6yssH AFOQ== X-Gm-Message-State: AOJu0Yxy9hCvWgtqD2Kh2E1DG7Z34oZpIrkgMPNyhnQUGPmd9yQK0nMm qiKIbLOJ4HrcTxbmmUP+okNs9sQXU9TG8yIkw391lckOSOIC3/OMVaGcL4jr0b9n X-Gm-Gg: ASbGncueWpZasZSf0sUkF0Qe9/YzYrNVKTvQLKJtSOtchC50CbEGQkGpk2IZKPQY7tt a2Ww7Iaffwpy1H0r5dJ1TXpUcK99k7htsUF9vCPIuvMosCEOOs0Cw18Qf40NAGxBF/ZG568IonH RA2hALjT7lWcLz6eEI8YpTZyfl6c2ZSJMtbV3jvzyUdm8N72tscxWiCqM2QLFFs10yROofP9Gkd nOcZWO4gwDpX87Ix+Z+OSfWrLovX8ciejlZ/sFieKE7p+GyPsSzYPmFHuF+76oKSv94xhrbAaDw 2jI2IdRe++pDOSkce8JRnK+T2ug8jmt9LzyGiUlrN3jXf0FhcimlrnWEz5zSx/EJgxTk3rE/c7L Z+uoaSOwTt8lpVozmrH8rxWeSSAn9jIo7sdV6ZB0hLglWZU7T X-Google-Smtp-Source: AGHT+IEzN3zS6xGqVRO8VCU7zICi7Cd8TK0JwH77VbJyPE7udYDtblpgFcyovJkjgfD5sCBUy3Ty/w== X-Received: by 2002:ac2:4e0e:0:b0:570:daa5:de18 with SMTP id 2adb3069b0e04-58cbbbeee5dmr5043998e87.33.1759838332383; Tue, 07 Oct 2025 04:58:52 -0700 (PDT) Received: from curiosity ([5.188.167.4]) by smtp.googlemail.com with ESMTPSA id 2adb3069b0e04-58b011a8941sm6043339e87.114.2025.10.07.04.58.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Oct 2025 04:58:51 -0700 (PDT) From: Sergey Matyukevich To: linux-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Oleg Nesterov , Shuah Khan , Jisheng Zhang , Thomas Gleixner , Thomas Huth , Charlie Jenkins , Andy Chiu , Han Gao , Samuel Holland , Nam Cao , Joel Granados , =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , Conor Dooley , Sergey Matyukevich Subject: [PATCH v2 5/6] selftests: riscv: verify initial vector state with ptrace Date: Tue, 7 Oct 2025 14:58:21 +0300 Message-ID: <20251007115840.2320557-6-geomatsi@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251007115840.2320557-1-geomatsi@gmail.com> References: <20251007115840.2320557-1-geomatsi@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251007_045855_082522_788B2CF5 X-CRM114-Status: GOOD ( 12.21 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add a test case that attaches to a traced process immediately after its first vector instructions to verify the initial vector context state. Signed-off-by: Sergey Matyukevich --- .../testing/selftests/riscv/vector/v_ptrace.c | 103 ++++++++++++++++++ 1 file changed, 103 insertions(+) diff --git a/tools/testing/selftests/riscv/vector/v_ptrace.c b/tools/testing/selftests/riscv/vector/v_ptrace.c index ccda8a4dc49b..f452e04629ea 100644 --- a/tools/testing/selftests/riscv/vector/v_ptrace.c +++ b/tools/testing/selftests/riscv/vector/v_ptrace.c @@ -196,4 +196,107 @@ TEST(ptrace_rvv_invalid_vtype) } } +TEST(ptrace_rvv_early_access) +{ + 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 = 1; + + pid = fork(); + + ASSERT_LE(0, pid) + TH_LOG("fork: %m"); + + if (pid == 0) { + while (chld_lock == 1) + asm volatile("" : : "g"(chld_lock) : "memory"); + + asm volatile("csrr %[vstart], vstart" : [vstart] "=r"(vstart)); + asm volatile("csrr %[vl], vl" : [vl] "=r"(vl)); + asm volatile("csrr %[vtype], vtype" : [vtype] "=r"(vtype)); + asm volatile("csrr %[vcsr], vcsr" : [vcsr] "=r"(vcsr)); + asm volatile("csrr %[vlenb], vlenb" : [vlenb] "=r"(vlenb)); + + asm volatile ("ebreak" : : : ); + } else { + struct __riscv_v_regset_state *regset_data; + unsigned long vstart_csr; + unsigned long vl_csr; + unsigned long vtype_csr; + unsigned long vcsr_csr; + unsigned long vlenb_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 = 0; + vstart_csr = ptrace(PTRACE_PEEKDATA, pid, &vstart, NULL); + ASSERT_FALSE((errno != 0) && (vstart_csr == -1)); + + errno = 0; + vl_csr = ptrace(PTRACE_PEEKDATA, pid, &vl, NULL); + ASSERT_FALSE((errno != 0) && (vl_csr == -1)); + + errno = 0; + vtype_csr = ptrace(PTRACE_PEEKDATA, pid, &vtype, NULL); + ASSERT_FALSE((errno != 0) && (vtype_csr == -1)); + + errno = 0; + vcsr_csr = ptrace(PTRACE_PEEKDATA, pid, &vcsr, NULL); + ASSERT_FALSE((errno != 0) && (vcsr_csr == -1)); + + errno = 0; + vlenb_csr = ptrace(PTRACE_PEEKDATA, pid, &vlenb, NULL); + ASSERT_FALSE((errno != 0) && (vlenb_csr == -1)); + + /* read tracee csr regs using ptrace GETREGSET */ + + regset_size = sizeof(*regset_data) + vlenb_csr * 32; + regset_data = calloc(1, regset_size); + + iov.iov_base = regset_data; + iov.iov_len = 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 -- 2.51.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv