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Tsirkin" , Marcel Apfelbaum , Fabiano Rosas , Laurent Vivier , Paolo Bonzini , Gerd Hoffmann Subject: [RFC PATCH 1/5] qtest/pci: Enforce balanced iomap/unmap Date: Sat, 9 Nov 2024 01:42:24 +1000 Message-ID: <20241108154229.263097-2-npiggin@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241108154229.263097-1-npiggin@gmail.com> References: <20241108154229.263097-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::42d; envelope-from=npiggin@gmail.com; helo=mail-pf1-x42d.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1731080637355116600 Content-Type: text/plain; charset="utf-8" Add assertions to ensure a BAR is not mapped twice, and only previously mapped BARs are unmapped. This can help catch some bugs. Signed-off-by: Nicholas Piggin Reviewed-by: Fabiano Rosas --- 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 a0487a1557..5d7e26aee2 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); =20 /* Port Management */ diff --git a/tests/qtest/libqos/pci.h b/tests/qtest/libqos/pci.h index 8389614523..9dc82ea723 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-pc= i.h index f5115cacba..efdf904b25 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; =20 + bool enabled; int bar_idx; =20 /* VIRTIO 1.0 */ diff --git a/tests/qtest/ahci-test.c b/tests/qtest/ahci-test.c index 5a1923f721..b3dae7a8ce 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); =20 + 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 34a75b7f43..cfc435b666 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); } =20 +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 b23d72346b..a42ca08261 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; =20 qpci_device_set(dev, bus, addr->devfn); vendor_id =3D qpci_config_readw(dev, PCI_VENDOR_ID); device_id =3D qpci_config_readw(dev, PCI_DEVICE_ID); g_assert(!addr->vendor_id || vendor_id =3D=3D addr->vendor_id); g_assert(!addr->device_id || device_id =3D=3D addr->device_id); + + for (i =3D 0; i < 6; i++) { + g_assert(!dev->bars_mapped[i]); + } } =20 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; =20 g_assert(barno >=3D 0 && barno <=3D 5); + g_assert(!dev->bars_mapped[barno]); + bar_reg =3D bar_reg_map[barno]; =20 qpci_config_writel(dev, bar_reg, 0xFFFFFFFF); @@ -574,12 +581,35 @@ QPCIBar qpci_iomap(QPCIDevice *dev, int barno, uint64= _t *sizeptr) } =20 bar.addr =3D loc; + + dev->bars_mapped[barno] =3D true; + dev->bars[barno] =3D bar; + return bar; } =20 void qpci_iounmap(QPCIDevice *dev, QPCIBar bar) { - /* FIXME */ + static const int bar_reg_map[] =3D { + 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 =3D 0; i < 6; i++) { + if (!dev->bars_mapped[i]) { + continue; + } + if (dev->bars[i].addr =3D=3D bar.addr) { + dev->bars_mapped[i] =3D false; + bar_reg =3D bar_reg_map[i]; + qpci_config_writel(dev, bar_reg, 0xFFFFFFFF); + /* FIXME: the address space is leaked */ + return; + } + } + g_assert_not_reached(); } =20 QPCIBar qpci_legacy_iomap(QPCIDevice *dev, uint16_t addr) diff --git a/tests/qtest/libqos/virtio-pci.c b/tests/qtest/libqos/virtio-pc= i.c index 485b8f6b7e..2b59fb181c 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 =3D qpci_iomap(d->pdev, d->bar_idx, NULL); + d->enabled =3D true; } =20 void qvirtio_pci_device_disable(QVirtioPCIDevice *d) { - qpci_iounmap(d->pdev, d->bar); + if (d->enabled) { + qpci_iounmap(d->pdev, d->bar); + d->enabled =3D false; + } } =20 void qvirtqueue_pci_msix_setup(QVirtioPCIDevice *d, QVirtQueuePCI *vqpci, --=20 2.45.2