From patchwork Wed Oct 16 20:40:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Henrique Barboza X-Patchwork-Id: 13838937 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 6E87BD206B6 for ; Wed, 16 Oct 2024 20:43:11 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t1Apj-0004au-IN; Wed, 16 Oct 2024 16:41:27 -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 1t1Aph-0004Xi-Sx for qemu-devel@nongnu.org; Wed, 16 Oct 2024 16:41:25 -0400 Received: from mail-pj1-x1030.google.com ([2607:f8b0:4864:20::1030]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1t1Apf-0004hi-Vq for qemu-devel@nongnu.org; Wed, 16 Oct 2024 16:41:25 -0400 Received: by mail-pj1-x1030.google.com with SMTP id 98e67ed59e1d1-2e2a999b287so193902a91.0 for ; Wed, 16 Oct 2024 13:41:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1729111282; x=1729716082; 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=S8OV9slWCqGfaCLWfWBNZMKpoiP4jDzulY/saMCxV/s=; b=kBvVoh36jYX/BK/7j0mBkhueczQ7TjTChgdqlKX7kqdtHa2ZWZHxy3cslKVg8Yaoll WC1IiM6x4b3pvptAN11SMXTMaQv8jUA62B/rHQ2b10NQhBubok0/aqwtIRhUVvZYbDg2 KRyW0QIQMTBwvm8y/HgnUH+4IU0VinkFSoNAyNpktod4eHKRyturqqWN8ItnaPDm5XBj 1IjwmULil1TppqSlASP4YJGLWKFZKLDl2oeWZR5Zrtuw30gcNHn0v+MUQmc/VaiM/alt VRowOknhhFfiBnXIIaNg+RVszs0ir9FfxZXoK8Siid4oGdsrcJ1mkf2IoH3PIcHfwwx0 ukrQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729111282; x=1729716082; 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=S8OV9slWCqGfaCLWfWBNZMKpoiP4jDzulY/saMCxV/s=; b=J27vfmItJlqvM2VI1T/4/OwHJNujSIxGII2ywfttvl62c9gPFzJtxG25di3BlS/buY FS1Z/INIdyWsIW000WmCxfJsQxTZNNbtJbFuWoHaaoRA2cji6pVBjK1JBU9x2QUaAjI2 WpVpnKztFoQ5eKdopMNMZpp1VJm/NTl3RO/D7YXpA5lZxIGy9v8/4yLDg2uuXyeClQ+N 147XOfUWdBY7/oUhz/eGw+GDJf9dJb3WN5rFV9kZuQt5TQJ7YktkYZXbqsq5wXQsE4fC g3lesAV8Op/RU2h2xEsUR1/IQPhptFRgQjatoxvwWcOlAETMqpQihBsO6HCv8jegAvxo JthQ== X-Gm-Message-State: AOJu0YwHi3ECT9xwhBZYrzpKZNpNZOVUfpU6eCfDGcs0G4JmBWD5txXW O/WrxKhzJBHvExeNHHhCXKys5HsZRfsih2UTLebZsCqHcvUiUKygtLOxAdWisuO1FRRkmpEYLLf H X-Google-Smtp-Source: AGHT+IG/T4VWHhY0il5M5sCopVFMrfrT5VSz3jMcrdt9gmF6Uhj36UXEk1T+DiY6amUHIUE1JK1BsA== X-Received: by 2002:a17:90b:4a0a:b0:2e2:b44d:119d with SMTP id 98e67ed59e1d1-2e2f0da18e0mr20850479a91.39.1729111282024; Wed, 16 Oct 2024 13:41:22 -0700 (PDT) Received: from grind.dc1.ventanamicro.com ([177.188.133.9]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e3e09085cfsm242158a91.54.2024.10.16.13.41.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Oct 2024 13:41:21 -0700 (PDT) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com, bmeng@tinylab.org, liwei1518@gmail.com, zhiwei_liu@linux.alibaba.com, palmer@rivosinc.com, Daniel Henrique Barboza , Frank Chang Subject: [PATCH v10 11/12] qtest/riscv-iommu-test: add init queues test Date: Wed, 16 Oct 2024 17:40:35 -0300 Message-ID: <20241016204038.649340-12-dbarboza@ventanamicro.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241016204038.649340-1-dbarboza@ventanamicro.com> References: <20241016204038.649340-1-dbarboza@ventanamicro.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::1030; envelope-from=dbarboza@ventanamicro.com; helo=mail-pj1-x1030.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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org 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 --- tests/qtest/libqos/riscv-iommu.h | 30 ++++++++ tests/qtest/riscv-iommu-test.c | 125 +++++++++++++++++++++++++++++++ 2 files changed, 155 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 be72cf3d74..df0c7813ec 100644 --- a/tests/qtest/riscv-iommu-test.c +++ b/tests/qtest/riscv-iommu-test.c @@ -25,6 +25,18 @@ static uint64_t riscv_iommu_read_reg64(QRISCVIOMMU *r_iommu, int reg_offset) return qpci_io_readq(&r_iommu->dev, r_iommu->reg_bar, reg_offset); } +static void riscv_iommu_write_reg32(QRISCVIOMMU *r_iommu, int reg_offset, + uint32_t val) +{ + qpci_io_writel(&r_iommu->dev, r_iommu->reg_bar, reg_offset, val); +} + +static void riscv_iommu_write_reg64(QRISCVIOMMU *r_iommu, int reg_offset, + uint64_t val) +{ + qpci_io_writeq(&r_iommu->dev, r_iommu->reg_bar, reg_offset, val); +} + static void test_pci_config(void *obj, void *data, QGuestAllocator *t_alloc) { QRISCVIOMMU *r_iommu = obj; @@ -76,10 +88,123 @@ 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);