From patchwork Thu Sep 12 05:29:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alistair Francis X-Patchwork-Id: 1984374 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20230601 header.b=MVZ/tHr9; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4X45yc6NhMz1y28 for ; Thu, 12 Sep 2024 15:46:00 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1socQx-0006WD-Cy; Thu, 12 Sep 2024 01:31:59 -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 1socQJ-0003hU-0n for qemu-devel@nongnu.org; Thu, 12 Sep 2024 01:31:23 -0400 Received: from mail-pg1-x531.google.com ([2607:f8b0:4864:20::531]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1socQG-00035T-Kh for qemu-devel@nongnu.org; Thu, 12 Sep 2024 01:31:18 -0400 Received: by mail-pg1-x531.google.com with SMTP id 41be03b00d2f7-656d8b346d2so425699a12.2 for ; Wed, 11 Sep 2024 22:31:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1726119075; x=1726723875; 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=W0QoSfGJXqOMmELOrOr90/RAPKmZ/9pld+RMp498JFM=; b=MVZ/tHr9QEzVG18+mclv+Tixoxax8SvH7isStwA3eH3Mhe4GXg7FPj51Sh1uk/pgUh oUplAMeFRV8azGGPtWw53idDpJqmwx/V6TvSJOgZaMMU9mkKifBcPIUwSAvEyuDQXlub gPb/QedgeN8pczmhREL1xFPcUyhxRKvN9NyQUqWjcAQ2Xx3WWj8NIG5BF0qxmHWdlhru /UxRJM7xp4lWesFbyiA7q+saRdq2LgYMQadlWKoQWN8+cmo1uHzFEqgFQxorZCAYru33 Mzih5K5wzdwDGqncLJ9Q3ylBcp0vA6LxLSmsjrzicdire5zHLmdN7fSwe1VqpvKs4zvg u21g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726119075; x=1726723875; 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=W0QoSfGJXqOMmELOrOr90/RAPKmZ/9pld+RMp498JFM=; b=AriX8Jpafno9WcL5toM0aGamxTQKJTP2cM7ZWg0HcGOrwMKqBUZhium/2HP6xFJcQH JMtbjjj9MduE5RLXCehMCvl1U9yVf58rIxxO68KgEP1dgM4HBatzedI68K6fFPrM/Dpb pscuR1SKmVN2CCNOYaOifTEEQLqDNbhpWDd7r9BYRpNpREUEHE5o3ZOjXc0cEsBdFvVm CUHkNADjBPUp1OnbLKKMwRV1U2K4XpxGPb3evEZi/OaZ55ALtVGHSeT7taPK0deEl4KS 24kaq5n/uddos/3+fetgOGu8FhBDNumub1pMkP2k1JJkKsuiJVnNkcCNQPQhUiIH4Jo8 5u/g== X-Gm-Message-State: AOJu0YyNTryQBy6zCDdATFE28APEiORLBT4iLWqTxvasShXdI1x+eCQY Vh4MvFGP9TTR1fZZTF2g2ZM1BgeORwyilBUG/tompdPLMkRN2UldG8fwMA== X-Google-Smtp-Source: AGHT+IFINdLzsheOopuexKEJ90gMyuDC6sN9x8R4KB/vZvCjk2JCPxvtk2JhI+ADLuBgzprq+irWhQ== X-Received: by 2002:a05:6a21:164a:b0:1cf:54bd:393a with SMTP id adf61e73a8af0-1cf7620c101mr1916357637.37.1726119074955; Wed, 11 Sep 2024 22:31:14 -0700 (PDT) Received: from toolbox.alistair23.me (2403-580b-97e8-0-82ce-f179-8a79-69f4.ip6.aussiebb.net. [2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71908fc8fdesm3833034b3a.1.2024.09.11.22.31.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Sep 2024 22:31:14 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Daniel Henrique Barboza , Frank Chang , Alistair Francis Subject: [PULL 24/47] qtest/riscv-iommu-test: add init queues test Date: Thu, 12 Sep 2024 15:29:29 +1000 Message-ID: <20240912052953.2552501-25-alistair.francis@wdc.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240912052953.2552501-1-alistair.francis@wdc.com> References: <20240912052953.2552501-1-alistair.francis@wdc.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::531; envelope-from=alistair23@gmail.com; helo=mail-pg1-x531.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Daniel Henrique Barboza Add an additional test to further exercise the IOMMU where we attempt to initialize the command, fault and page-request queues. These steps are taken from chapter 6.2 of the RISC-V IOMMU spec, "Guidelines for initialization". It emulates what we expect from the software/OS when initializing the IOMMU. Signed-off-by: Daniel Henrique Barboza Reviewed-by: Frank Chang Acked-by: Alistair Francis Message-ID: <20240903201633.93182-12-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis --- tests/qtest/libqos/riscv-iommu.h | 30 ++++++++ tests/qtest/riscv-iommu-test.c | 127 +++++++++++++++++++++++++++++++ 2 files changed, 157 insertions(+) diff --git a/tests/qtest/libqos/riscv-iommu.h b/tests/qtest/libqos/riscv-iommu.h index d123efb41f..318db13799 100644 --- a/tests/qtest/libqos/riscv-iommu.h +++ b/tests/qtest/libqos/riscv-iommu.h @@ -62,6 +62,36 @@ #define RISCV_IOMMU_REG_IPSR 0x0054 +#define RISCV_IOMMU_REG_IVEC 0x02F8 +#define RISCV_IOMMU_REG_IVEC_CIV GENMASK_ULL(3, 0) +#define RISCV_IOMMU_REG_IVEC_FIV GENMASK_ULL(7, 4) +#define RISCV_IOMMU_REG_IVEC_PMIV GENMASK_ULL(11, 8) +#define RISCV_IOMMU_REG_IVEC_PIV GENMASK_ULL(15, 12) + +#define RISCV_IOMMU_REG_CQB 0x0018 +#define RISCV_IOMMU_CQB_PPN_START 10 +#define RISCV_IOMMU_CQB_PPN_LEN 44 +#define RISCV_IOMMU_CQB_LOG2SZ_START 0 +#define RISCV_IOMMU_CQB_LOG2SZ_LEN 5 + +#define RISCV_IOMMU_REG_CQT 0x0024 + +#define RISCV_IOMMU_REG_FQB 0x0028 +#define RISCV_IOMMU_FQB_PPN_START 10 +#define RISCV_IOMMU_FQB_PPN_LEN 44 +#define RISCV_IOMMU_FQB_LOG2SZ_START 0 +#define RISCV_IOMMU_FQB_LOG2SZ_LEN 5 + +#define RISCV_IOMMU_REG_FQT 0x0034 + +#define RISCV_IOMMU_REG_PQB 0x0038 +#define RISCV_IOMMU_PQB_PPN_START 10 +#define RISCV_IOMMU_PQB_PPN_LEN 44 +#define RISCV_IOMMU_PQB_LOG2SZ_START 0 +#define RISCV_IOMMU_PQB_LOG2SZ_LEN 5 + +#define RISCV_IOMMU_REG_PQT 0x0044 + typedef struct QRISCVIOMMU { QOSGraphObject obj; QPCIDevice dev; diff --git a/tests/qtest/riscv-iommu-test.c b/tests/qtest/riscv-iommu-test.c index 7f0dbd0211..c38a0a160d 100644 --- a/tests/qtest/riscv-iommu-test.c +++ b/tests/qtest/riscv-iommu-test.c @@ -33,6 +33,20 @@ static uint64_t riscv_iommu_read_reg64(QRISCVIOMMU *r_iommu, int reg_offset) return reg; } +static void riscv_iommu_write_reg32(QRISCVIOMMU *r_iommu, int reg_offset, + uint32_t val) +{ + qpci_memwrite(&r_iommu->dev, r_iommu->reg_bar, reg_offset, + &val, sizeof(val)); +} + +static void riscv_iommu_write_reg64(QRISCVIOMMU *r_iommu, int reg_offset, + uint64_t val) +{ + qpci_memwrite(&r_iommu->dev, r_iommu->reg_bar, reg_offset, + &val, sizeof(val)); +} + static void test_pci_config(void *obj, void *data, QGuestAllocator *t_alloc) { QRISCVIOMMU *r_iommu = obj; @@ -84,10 +98,123 @@ static void test_reg_reset(void *obj, void *data, QGuestAllocator *t_alloc) g_assert_cmpuint(reg, ==, 0); } +/* + * Common timeout-based poll for CQCSR, FQCSR and PQCSR. All + * their ON bits are mapped as RISCV_IOMMU_QUEUE_ACTIVE (16), + */ +static void qtest_wait_for_queue_active(QRISCVIOMMU *r_iommu, + uint32_t queue_csr) +{ + QTestState *qts = global_qtest; + guint64 timeout_us = 2 * 1000 * 1000; + gint64 start_time = g_get_monotonic_time(); + uint32_t reg; + + for (;;) { + qtest_clock_step(qts, 100); + + reg = riscv_iommu_read_reg32(r_iommu, queue_csr); + if (reg & RISCV_IOMMU_QUEUE_ACTIVE) { + break; + } + g_assert(g_get_monotonic_time() - start_time <= timeout_us); + } +} + +/* + * Goes through the queue activation procedures of chapter 6.2, + * "Guidelines for initialization", of the RISCV-IOMMU spec. + */ +static void test_iommu_init_queues(void *obj, void *data, + QGuestAllocator *t_alloc) +{ + QRISCVIOMMU *r_iommu = obj; + uint64_t reg64, q_addr; + uint32_t reg; + int k = 2; + + reg64 = riscv_iommu_read_reg64(r_iommu, RISCV_IOMMU_REG_CAP); + g_assert_cmpuint(reg64 & RISCV_IOMMU_CAP_VERSION, ==, 0x10); + + /* + * Program the command queue. Write 0xF to civ, fiv, pmiv and + * piv. With the current PCI device impl we expect 2 writable + * bits for each (k = 2) since we have N = 4 total vectors (2^k). + */ + riscv_iommu_write_reg32(r_iommu, RISCV_IOMMU_REG_IVEC, 0xFFFF); + reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_IVEC); + g_assert_cmpuint(reg & RISCV_IOMMU_REG_IVEC_CIV, ==, 0x3); + g_assert_cmpuint(reg & RISCV_IOMMU_REG_IVEC_FIV, ==, 0x30); + g_assert_cmpuint(reg & RISCV_IOMMU_REG_IVEC_PMIV, ==, 0x300); + g_assert_cmpuint(reg & RISCV_IOMMU_REG_IVEC_PIV, ==, 0x3000); + + /* Alloc a 4*16 bytes buffer and use it to set cqb */ + q_addr = guest_alloc(t_alloc, 4 * 16); + reg64 = 0; + deposit64(reg64, RISCV_IOMMU_CQB_PPN_START, + RISCV_IOMMU_CQB_PPN_LEN, q_addr); + deposit64(reg64, RISCV_IOMMU_CQB_LOG2SZ_START, + RISCV_IOMMU_CQB_LOG2SZ_LEN, k - 1); + riscv_iommu_write_reg64(r_iommu, RISCV_IOMMU_REG_CQB, reg64); + + /* cqt = 0, cqcsr.cqen = 1, poll cqcsr.cqon until it reads 1 */ + riscv_iommu_write_reg32(r_iommu, RISCV_IOMMU_REG_CQT, 0); + + reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_CQCSR); + reg |= RISCV_IOMMU_CQCSR_CQEN; + riscv_iommu_write_reg32(r_iommu, RISCV_IOMMU_REG_CQCSR, reg); + + qtest_wait_for_queue_active(r_iommu, RISCV_IOMMU_REG_CQCSR); + + /* + * Program the fault queue. Alloc a 4*32 bytes (instead of 4*16) + * buffer and use it to set fqb. + */ + q_addr = guest_alloc(t_alloc, 4 * 32); + reg64 = 0; + deposit64(reg64, RISCV_IOMMU_FQB_PPN_START, + RISCV_IOMMU_FQB_PPN_LEN, q_addr); + deposit64(reg64, RISCV_IOMMU_FQB_LOG2SZ_START, + RISCV_IOMMU_FQB_LOG2SZ_LEN, k - 1); + riscv_iommu_write_reg64(r_iommu, RISCV_IOMMU_REG_FQB, reg64); + + /* fqt = 0, fqcsr.fqen = 1, poll fqcsr.fqon until it reads 1 */ + riscv_iommu_write_reg32(r_iommu, RISCV_IOMMU_REG_FQT, 0); + + reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_FQCSR); + reg |= RISCV_IOMMU_FQCSR_FQEN; + riscv_iommu_write_reg32(r_iommu, RISCV_IOMMU_REG_FQCSR, reg); + + qtest_wait_for_queue_active(r_iommu, RISCV_IOMMU_REG_FQCSR); + + /* + * Program the page-request queue. Alloc a 4*16 bytes buffer + * and use it to set pqb. + */ + q_addr = guest_alloc(t_alloc, 4 * 16); + reg64 = 0; + deposit64(reg64, RISCV_IOMMU_PQB_PPN_START, + RISCV_IOMMU_PQB_PPN_LEN, q_addr); + deposit64(reg64, RISCV_IOMMU_PQB_LOG2SZ_START, + RISCV_IOMMU_PQB_LOG2SZ_LEN, k - 1); + riscv_iommu_write_reg64(r_iommu, RISCV_IOMMU_REG_PQB, reg64); + + /* pqt = 0, pqcsr.pqen = 1, poll pqcsr.pqon until it reads 1 */ + riscv_iommu_write_reg32(r_iommu, RISCV_IOMMU_REG_PQT, 0); + + reg = riscv_iommu_read_reg32(r_iommu, RISCV_IOMMU_REG_PQCSR); + reg |= RISCV_IOMMU_PQCSR_PQEN; + riscv_iommu_write_reg32(r_iommu, RISCV_IOMMU_REG_PQCSR, reg); + + qtest_wait_for_queue_active(r_iommu, RISCV_IOMMU_REG_PQCSR); +} + static void register_riscv_iommu_test(void) { qos_add_test("pci_config", "riscv-iommu-pci", test_pci_config, NULL); qos_add_test("reg_reset", "riscv-iommu-pci", test_reg_reset, NULL); + qos_add_test("iommu_init_queues", "riscv-iommu-pci", + test_iommu_init_queues, NULL); } libqos_init(register_riscv_iommu_test);