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| author | Daniel Henrique Barboza <danielhb413@gmail.com> | 2022-01-12 11:28:27 +0100 |
|---|---|---|
| committer | Cédric Le Goater <clg@kaod.org> | 2022-01-12 11:28:27 +0100 |
| commit | 41cb8d319df0488f31abd11519f21daf76ee1459 (patch) | |
| tree | 12ccd17983d41f4863d36c8490b5ba92a5e692f6 | |
| parent | eb93c82888f4d19c00ac1aafaec23346c2e899b4 (diff) | |
| download | qemu-41cb8d319df0488f31abd11519f21daf76ee1459.zip qemu-41cb8d319df0488f31abd11519f21daf76ee1459.tar.gz qemu-41cb8d319df0488f31abd11519f21daf76ee1459.tar.bz2 | |
pnv_phb3.h: change TYPE_PNV_PHB3_ROOT_BUS name
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 <danielhb413@gmail.com>
Message-Id: <20220105212338.49899-11-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
| -rw-r--r-- | include/hw/pci-host/pnv_phb3.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/hw/pci-host/pnv_phb3.h b/include/hw/pci-host/pnv_phb3.h index 2e423c3..af6ec83 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" |