From 41cb8d319df0488f31abd11519f21daf76ee1459 Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Wed, 12 Jan 2022 11:28:27 +0100 Subject: [PATCH] pnv_phb3.h: change TYPE_PNV_PHB3_ROOT_BUS name MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The TYPE_PNV_PHB3_ROOT_BUS name is used as the default bus name when the dev has no 'id'. However, pnv-phb3-root-bus is a bit too long to be used as a bus name. Most common QEMU buses and PCI controllers are named based on their bus type (e.g. pSeries spapr-pci-host-bridge is called 'pci'). The most common name for a PCIE bus controller in QEMU is 'pcie'. Naming it 'pcie' would break the documented use of the pnv-phb3 device, since 'pcie.0' would now refer to the root bus instead of the first root port. There's nothing particularly wrong with the 'root-bus' name used before, aside from the fact that 'root-bus' is being used for pnv-phb3 and pnv-phb4 created buses, which is not quite correct since these buses aren't implemented the same way in QEMU - you can't plug a pnv-phb4-root-port into a pnv-phb3 root bus, for example. This patch renames it as 'pnv-phb3-root', which is a compromise between the existing and the previously used name. Creating 3 phbs without ID will result in an "info qtree" output similar to this: bus: main-system-bus type System dev: pnv-phb3, id "" index = 2 (0x2) chip-id = 0 (0x0) x-config-reg-migration-enabled = true bypass-iommu = false bus: pnv-phb3-root.2 type pnv-phb3-root (...) dev: pnv-phb3, id "" index = 1 (0x1) chip-id = 0 (0x0) x-config-reg-migration-enabled = true bypass-iommu = false bus: pnv-phb3-root.1 type pnv-phb3-root (...) dev: pnv-phb3, id "" index = 0 (0x0) chip-id = 0 (0x0) x-config-reg-migration-enabled = true bypass-iommu = false bus: pnv-phb3-root.0 type pnv-phb3-root Signed-off-by: Daniel Henrique Barboza Message-Id: <20220105212338.49899-11-danielhb413@gmail.com> Signed-off-by: Cédric Le Goater --- include/hw/pci-host/pnv_phb3.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/hw/pci-host/pnv_phb3.h b/include/hw/pci-host/pnv_phb3.h index 2e423c3890..af6ec83cf6 100644 --- a/include/hw/pci-host/pnv_phb3.h +++ b/include/hw/pci-host/pnv_phb3.h @@ -105,7 +105,7 @@ struct PnvPBCQState { /* * PHB3 PCIe Root port */ -#define TYPE_PNV_PHB3_ROOT_BUS "pnv-phb3-root-bus" +#define TYPE_PNV_PHB3_ROOT_BUS "pnv-phb3-root" #define TYPE_PNV_PHB3_ROOT_PORT "pnv-phb3-root-port"