From patchwork Wed Jan 15 15:01:07 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 13940530 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 AC115C02180 for ; Wed, 15 Jan 2025 15:03:21 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tY4th-0004E2-3q; Wed, 15 Jan 2025 10:01:33 -0500 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 1tY4tf-0004D8-FX; Wed, 15 Jan 2025 10:01:31 -0500 Received: from mail-pl1-x636.google.com ([2607:f8b0:4864:20::636]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1tY4td-0002tI-PO; Wed, 15 Jan 2025 10:01:31 -0500 Received: by mail-pl1-x636.google.com with SMTP id d9443c01a7336-2166360285dso123124625ad.1; Wed, 15 Jan 2025 07:01:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1736953287; x=1737558087; 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=bRTDyBdfnK9kAprnP+Hh3qG7LUon4ziNP1QIA/V4/Ww=; b=LqP5KzG4xj1klLDyaKBr1PDy7gLDptupJSMc7MrhJfd8B+CZ2TR28iUv74ULLwPhWm IgvJvub+PqTR4o+565e8L3cK0ldOQFjZpUj0f2FvWHmyc4fz+dO0Q7WqzgyF0X21ar0u g6pSkPoQNl0oixICt7BQxzVIjs3i73Fi3fM8v+QAy0reCKdeS3Q0lgyn0rxCNF7/8kwm dj3u6e3AsGhwEq5bSmHKSGxeOYCL7WB1iFOq1WM277oyFokl8uztfb/dMN4scqFe2vAA ey79kkFc9cXXSL7Zqj0NErIhoY+vmKqFrfkuZDmUiPbxuqELZDGGvCjIu2dX11VeTZ+D IJdg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1736953287; x=1737558087; 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=bRTDyBdfnK9kAprnP+Hh3qG7LUon4ziNP1QIA/V4/Ww=; b=FRupjqm5n49H0edGhWcpzVGiHnLM25NFSu+VsuIsvkeIjMSsRjll7ZLpBHfXrsTZUa UQcZr0jAyMvDw+JDISl6tIw94S8hrB3lX+sd/qKYP7PSJZY22LsqLiSbP/5oiKb/lDd8 n/DH5jL4Zrnx+fcCkYjikcJueiFoaftMTdNBZnFLMzVBli+pjfZOxPGQvPH1ssPhEdBZ LEhYi6802UgxyjO28VHiFoo69CMuYMTMf6aK04BBJOBF59SDpvVYpEJ7FTGTuy3H9cvH NnQoOczqazrm/xK0utm+C0b1rEdyU6Ju1y098ux5fnFhgKmlfGP6CxeT3Ey199JDSF78 AlOw== X-Forwarded-Encrypted: i=1; AJvYcCWyyZvZwygKJZHiym5fN2tz0OUVUyybiPsorcQO0WhTvr1twmTb4asVYA1M8BqXN8Ik5R9sKuZWD/0n@nongnu.org X-Gm-Message-State: AOJu0YxcVrHEU8ZXqPaJQ+fSh7p6K10GyOltJ8Efj78IXY6rnl7DUN4I z2dhwZNhTgOeecPSMDYBYyucyPR4kKznHo2m+0Lc+UFxU4wGD3gySNkHuQ== X-Gm-Gg: ASbGncsPG5Fa4povmv9bswKNQhFSCRHqDoyCU5jycVHpGnr/gw00mKQmXMDtsBPJh5X XuVcgd/J1B/FQvOUb1GZ+yjEK7gFY6AR1GkCLQCfXI73p9E7k+JAQoJ8tTw7jV3JgEIKN39fIsC pBUJyPbYHAZ2uvnDcK2ttxan7WHPGsZf7Pe10xKxiSFU+UvXSm+k3isZ2JqRkvUZG/8oLL9TA9I TjSLdYksMbpQDQVcm0gwzsne8DaNOniFfWu0ZWNOMJV4x8dcwfIBWeF5ghuAg== X-Google-Smtp-Source: AGHT+IFXaXzY6Y5xpzCSgv6aikowSpTB99cwOlYwLyAWXoXKcEo2L9NLx+DBCwXcrd4dsCS0GayUBg== X-Received: by 2002:a05:6a00:ac2:b0:725:e1de:c0bf with SMTP id d2e1a72fcca58-72d21f2dcbcmr37039713b3a.9.1736953286796; Wed, 15 Jan 2025 07:01:26 -0800 (PST) Received: from wheely.local0.net ([118.210.104.29]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-72d40658a7esm9519592b3a.106.2025.01.15.07.01.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Jan 2025 07:01:26 -0800 (PST) From: Nicholas Piggin To: qemu-devel@nongnu.org Cc: Nicholas Piggin , "Michael S . Tsirkin" , Marcel Apfelbaum , John Snow , Fabiano Rosas , Laurent Vivier , Paolo Bonzini , Dmitry Fleytman , Akihiko Odaki , Sriram Yagnaraman , qemu-block@nongnu.org Subject: [PATCH v2 1/5] qtest/pci: Enforce balanced iomap/unmap Date: Thu, 16 Jan 2025 01:01:07 +1000 Message-ID: <20250115150112.346497-2-npiggin@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250115150112.346497-1-npiggin@gmail.com> References: <20250115150112.346497-1-npiggin@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::636; envelope-from=npiggin@gmail.com; helo=mail-pl1-x636.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, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add assertions to ensure a BAR is not mapped twice, and only previously mapped BARs are unmapped. This can help catch some bugs. Cc: Michael S. Tsirkin Cc: Marcel Apfelbaum Reviewed-by: Fabiano Rosas Signed-off-by: Nicholas Piggin --- tests/qtest/libqos/ahci.h | 1 + tests/qtest/libqos/pci.h | 2 ++ tests/qtest/libqos/virtio-pci.h | 1 + tests/qtest/ahci-test.c | 2 ++ tests/qtest/libqos/ahci.c | 6 ++++++ tests/qtest/libqos/pci.c | 32 +++++++++++++++++++++++++++++++- tests/qtest/libqos/virtio-pci.c | 6 +++++- 7 files changed, 48 insertions(+), 2 deletions(-) diff --git a/tests/qtest/libqos/ahci.h b/tests/qtest/libqos/ahci.h index a0487a1557d..5d7e26aee2a 100644 --- a/tests/qtest/libqos/ahci.h +++ b/tests/qtest/libqos/ahci.h @@ -575,6 +575,7 @@ QPCIDevice *get_ahci_device(QTestState *qts, uint32_t *fingerprint); void free_ahci_device(QPCIDevice *dev); void ahci_pci_enable(AHCIQState *ahci); void start_ahci_device(AHCIQState *ahci); +void stop_ahci_device(AHCIQState *ahci); void ahci_hba_enable(AHCIQState *ahci); /* Port Management */ diff --git a/tests/qtest/libqos/pci.h b/tests/qtest/libqos/pci.h index 83896145235..9dc82ea723a 100644 --- a/tests/qtest/libqos/pci.h +++ b/tests/qtest/libqos/pci.h @@ -65,6 +65,8 @@ struct QPCIDevice { QPCIBus *bus; int devfn; + bool bars_mapped[6]; + QPCIBar bars[6]; bool msix_enabled; QPCIBar msix_table_bar, msix_pba_bar; uint64_t msix_table_off, msix_pba_off; diff --git a/tests/qtest/libqos/virtio-pci.h b/tests/qtest/libqos/virtio-pci.h index f5115cacba2..efdf904b254 100644 --- a/tests/qtest/libqos/virtio-pci.h +++ b/tests/qtest/libqos/virtio-pci.h @@ -26,6 +26,7 @@ typedef struct QVirtioPCIDevice { uint64_t config_msix_addr; uint32_t config_msix_data; + bool enabled; int bar_idx; /* VIRTIO 1.0 */ diff --git a/tests/qtest/ahci-test.c b/tests/qtest/ahci-test.c index 5a1923f721b..b3dae7a8ce4 100644 --- a/tests/qtest/ahci-test.c +++ b/tests/qtest/ahci-test.c @@ -1483,6 +1483,8 @@ static void test_reset_pending_callback(void) /* Wait for throttled write to finish. */ sleep(1); + stop_ahci_device(ahci); + /* Start again. */ ahci_clean_mem(ahci); ahci_pci_enable(ahci); diff --git a/tests/qtest/libqos/ahci.c b/tests/qtest/libqos/ahci.c index 34a75b7f43b..cfc435b6663 100644 --- a/tests/qtest/libqos/ahci.c +++ b/tests/qtest/libqos/ahci.c @@ -217,6 +217,12 @@ void start_ahci_device(AHCIQState *ahci) qpci_device_enable(ahci->dev); } +void stop_ahci_device(AHCIQState *ahci) +{ + /* Map AHCI's ABAR (BAR5) */ + qpci_iounmap(ahci->dev, ahci->hba_bar); +} + /** * Test and initialize the AHCI's HBA memory areas. * Initialize and start any ports with devices attached. diff --git a/tests/qtest/libqos/pci.c b/tests/qtest/libqos/pci.c index b23d72346b6..a42ca08261d 100644 --- a/tests/qtest/libqos/pci.c +++ b/tests/qtest/libqos/pci.c @@ -93,12 +93,17 @@ QPCIDevice *qpci_device_find(QPCIBus *bus, int devfn) void qpci_device_init(QPCIDevice *dev, QPCIBus *bus, QPCIAddress *addr) { uint16_t vendor_id, device_id; + int i; qpci_device_set(dev, bus, addr->devfn); vendor_id = qpci_config_readw(dev, PCI_VENDOR_ID); device_id = qpci_config_readw(dev, PCI_DEVICE_ID); g_assert(!addr->vendor_id || vendor_id == addr->vendor_id); g_assert(!addr->device_id || device_id == addr->device_id); + + for (i = 0; i < 6; i++) { + g_assert(!dev->bars_mapped[i]); + } } static uint8_t qpci_find_resource_reserve_capability(QPCIDevice *dev) @@ -531,6 +536,8 @@ QPCIBar qpci_iomap(QPCIDevice *dev, int barno, uint64_t *sizeptr) uint64_t loc; g_assert(barno >= 0 && barno <= 5); + g_assert(!dev->bars_mapped[barno]); + bar_reg = bar_reg_map[barno]; qpci_config_writel(dev, bar_reg, 0xFFFFFFFF); @@ -574,12 +581,35 @@ QPCIBar qpci_iomap(QPCIDevice *dev, int barno, uint64_t *sizeptr) } bar.addr = loc; + + dev->bars_mapped[barno] = true; + dev->bars[barno] = bar; + return bar; } void qpci_iounmap(QPCIDevice *dev, QPCIBar bar) { - /* FIXME */ + static const int bar_reg_map[] = { + PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_1, PCI_BASE_ADDRESS_2, + PCI_BASE_ADDRESS_3, PCI_BASE_ADDRESS_4, PCI_BASE_ADDRESS_5, + }; + int bar_reg; + int i; + + for (i = 0; i < 6; i++) { + if (!dev->bars_mapped[i]) { + continue; + } + if (dev->bars[i].addr == bar.addr) { + dev->bars_mapped[i] = false; + bar_reg = bar_reg_map[i]; + qpci_config_writel(dev, bar_reg, 0xFFFFFFFF); + /* FIXME: the address space is leaked */ + return; + } + } + g_assert_not_reached(); } QPCIBar qpci_legacy_iomap(QPCIDevice *dev, uint16_t addr) diff --git a/tests/qtest/libqos/virtio-pci.c b/tests/qtest/libqos/virtio-pci.c index 485b8f6b7e0..2b59fb181c9 100644 --- a/tests/qtest/libqos/virtio-pci.c +++ b/tests/qtest/libqos/virtio-pci.c @@ -304,11 +304,15 @@ void qvirtio_pci_device_enable(QVirtioPCIDevice *d) { qpci_device_enable(d->pdev); d->bar = qpci_iomap(d->pdev, d->bar_idx, NULL); + d->enabled = true; } void qvirtio_pci_device_disable(QVirtioPCIDevice *d) { - qpci_iounmap(d->pdev, d->bar); + if (d->enabled) { + qpci_iounmap(d->pdev, d->bar); + d->enabled = false; + } } void qvirtqueue_pci_msix_setup(QVirtioPCIDevice *d, QVirtQueuePCI *vqpci,