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Tsirkin" , Marcel Apfelbaum , Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_Goater?= , Paolo Bonzini , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Eduardo Habkost , Sriram Yagnaraman , Jason Wang , Keith Busch , Klaus Jensen Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org, Akihiko Odaki X-Mailer: b4 0.12.3 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: none client-ip=2607:f8b0:4864:20::42e; envelope-from=akihiko.odaki@daynix.com; helo=mail-pf1-x42e.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @daynix-com.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1708766787388100009 Currently there is no way to distinguish the case that rombar is explicitly specified as 1 and the case that rombar is not specified. Set rombar UINT32_MAX by default to distinguish these cases just as it is done for addr and romsize. It was confirmed that changing the default value to UINT32_MAX will not change the behavior by looking at occurences of rom_bar. $ git grep -w rom_bar hw/display/qxl.c:328: QXLRom *rom =3D memory_region_get_ram_ptr(&d->rom_= bar); hw/display/qxl.c:431: qxl_set_dirty(&qxl->rom_bar, 0, qxl->rom_size); hw/display/qxl.c:1048: QXLRom *rom =3D memory_region_get_ram_ptr(&qxl->r= om_bar); hw/display/qxl.c:2131: memory_region_init_rom(&qxl->rom_bar, OBJECT(qxl)= , "qxl.vrom", hw/display/qxl.c:2154: PCI_BASE_ADDRESS_SPACE_MEMORY, &qxl->rom_bar); hw/display/qxl.h:101: MemoryRegion rom_bar; hw/pci/pci.c:74: DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1), hw/pci/pci.c:2329: if (!pdev->rom_bar) { hw/vfio/pci.c:1019: if (vdev->pdev.romfile || !vdev->pdev.rom_bar) { hw/xen/xen_pt_load_rom.c:29: if (dev->romfile || !dev->rom_bar) { include/hw/pci/pci_device.h:150: uint32_t rom_bar; rom_bar refers to a different variable in qxl. It is only tested if the value is 0 or not in the other places. This changes the semantics of UINT32_MAX, which has always been a valid value to explicitly say rombar is enabled to denote the implicit default value. Nobody should have been set UINT32_MAX to rombar however, considering that its meaning was no different from 1 and typing a literal UINT32_MAX (0xffffffff or 4294967295) is more troublesome. Signed-off-by: Akihiko Odaki --- hw/pci/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 84df07a2789b..cb5ac46e9f27 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -71,7 +71,7 @@ static Property pci_props[] =3D { DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1), DEFINE_PROP_STRING("romfile", PCIDevice, romfile), DEFINE_PROP_UINT32("romsize", PCIDevice, romsize, UINT32_MAX), - DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1), + DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, UINT32_MAX), DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present, QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false), DEFINE_PROP_BIT("x-pcie-lnksta-dllla", PCIDevice, cap_present, --=20 2.43.2