Message ID | 20240108204909.564514-1-dwmw2@infradead.org |
---|---|
Headers | show |
Series | Rework matching of network devices to -nic options | expand |
Hi Jason, I think this series probably lives or dies with you. I think it's a worthwhile cleanup, but I no longer have an immediate need for it; I shipped a slightly ugly workaround in QEMU 8.2. Please could you let me know if it's worth persisting with it? Thanks. On Mon, 2024-01-08 at 20:26 +0000, David Woodhouse wrote: > > Most platforms iterating directly over the nd_table[] are doing one of > two things. Either they are creating the NIC for their platform and want > to find a matching -nic configuration for it, if such exists. Or they > are only going to create that platform NIC if a matching config *does* > exist. > > All of those can be converted to the new qemu_configure_nic_device() > and qemu_create_nic_device() functions. The latter of which will call > qdev_new() to create the device (and apply the config) if a matching > NIC config does exist for it. The existing behaviour of each platform > has been preserved for now, despite it being apparently fairly random. > > PCI and indeed XenBus can use a qemu_create_nic_bus_devices() which will > create all NICs that live on a given bus type. That covers most > platforms, but some PCI platforms do something special with the first > NIC of a given type, placing it in the slot where it would have been on > the real hardware. There were various inconsistencies in the way the > platforms did so, and whether they cared what model the NIC was. Those > subtle behavioural changes I *have* allowed to change, and now the > pci_init_nic_slot() function will pick the first NIC that the user > specified which isn't explicitly *not* the default type, and put that > in the specified slot. > > The tests for npcm7xx used to lament that they had to instantiate both > NICs even when they wanted to test only the second, because there was > no way to specify which hardware devices gets which configuration. I > made that untrue, by allowing 'emc0' and 'emc1' aliases, and fixed up > the test accordingly. > > There are one or two special cases which want to do special things with > the MAC address of the primary NIC, to set up a system identification > (or force it to use an Apple OUI, in the case of m68k/q400). All those > work out relatively cleanly too. > > And I can clean up the ugly patch which fixed up the Xen network device > handling, and replace it with a simple call to the new > qemu_create_nic_bus_devices() function. > > I suspect that we can remove the pci_init_nic_devices() from platform > code and just do it later, except for platforms which *care* which > PCI bus the dynamic devices go on (is that just sun4u which puts its > primary NIC onto a different bus?). > > Finally, while we're at it, clean up -nic model=help to only print > the device models which are actually usable on the given platform > rather than just listing them *all*. > > And now we can make nd_table[] and nb_nics static in net/net.c because > nothing else has any business poking at them directly. > > v3: Rebase to 8.2 > > v2: Some build fixes after better coverage testing, revert the Xen fix > in this series because I'm putting the less invasive hack into 8.2 > (hopefully). > > David Woodhouse (46): > net: add qemu_{configure,create}_nic_device(), qemu_find_nic_info() > net: report list of available models according to platform > net: add qemu_create_nic_bus_devices() > hw/pci: add pci_init_nic_devices(), pci_init_nic_in_slot() > hw/i386/pc: use qemu_get_nic_info() and pci_init_nic_devices() > hw/xen: use qemu_create_nic_bus_devices() to instantiate Xen NICs > hw/alpha/dp264: use pci_init_nic_devices() > hw/arm/sbsa-ref: use pci_init_nic_devices() > hw/arm/virt: use pci_init_nic_devices() > hw/hppa: use pci_init_nic_devices() > hw/loongarch: use pci_init_nic_devices() > hw/mips/fuloong2e: use pci_init_nic_devices() > hw/mips/malta: use pci_init_nic_devices() > hw/mips/loongson3_virt: use pci_init_nic_devices() > hw/ppc/prep: use pci_init_nic_devices() > hw/ppc/spapr: use qemu_get_nic_info() and pci_init_nic_devices() > hw/ppc: use pci_init_nic_devices() > hw/sh4/r2d: use pci_init_nic_devices() > hw/sparc64/sun4u: use pci_init_nic_devices() > hw/xtensa/virt: use pci_init_nic_devices() > hw/arm/allwinner: use qemu_configure_nic_device() > hw/arm/aspeed: use qemu_configure_nic_device() > hw/arm/exynos4: use qemu_create_nic_device() > hw/arm/fsl: use qemu_configure_nic_device() > hw/net/smc91c111: use qemu_configure_nic_device() > hw/net/lan9118: use qemu_configure_nic_device() > hw/arm/highbank: use qemu_create_nic_device() > hw/arm/npcm7xx: use qemu_configure_nic_device, allow emc0/emc1 as aliases > hw/arm/stellaris: use qemu_find_nic_info() > hw/arm: use qemu_configure_nic_device() > hw/net/etraxfs-eth: use qemu_configure_nic_device() > hw/m68k/mcf5208: use qemu_create_nic_device() > hw/m68k/q800: use qemu_find_nic_info() > hw/microblaze: use qemu_configure_nic_device() > hw/mips/mipssim: use qemu_create_nic_device() > hw/mips/jazz: use qemu_find_nic_info() > hw/net/lasi_i82596: use qemu_configure_nic_device() > hw/openrisc/openrisc_sim: use qemu_create_nic_device() > hw/riscv: use qemu_configure_nic_device() > hw/s390x/s390-virtio-ccw: use qemu_create_nic_device() > hw/sparc/sun4m: use qemu_find_nic_info() > hw/xtensa/xtfpga: use qemu_create_nic_device() > net: remove qemu_check_nic_model() > hw/pci: remove pci_nic_init_nofail() > net: remove qemu_show_nic_models(), qemu_find_nic_model() > net: make nb_nics and nd_table[] static in net/net.c > > hw/alpha/dp264.c | 4 +- > hw/arm/allwinner-a10.c | 6 +- > hw/arm/allwinner-h3.c | 6 +- > hw/arm/allwinner-r40.c | 27 +--- > hw/arm/aspeed.c | 9 +- > hw/arm/exynos4_boards.c | 6 +- > hw/arm/fsl-imx25.c | 2 +- > hw/arm/fsl-imx6.c | 2 +- > hw/arm/fsl-imx6ul.c | 2 +- > hw/arm/fsl-imx7.c | 2 +- > hw/arm/gumstix.c | 6 +- > hw/arm/highbank.c | 12 +- > hw/arm/integratorcp.c | 5 +- > hw/arm/kzm.c | 4 +- > hw/arm/mainstone.c | 3 +- > hw/arm/mps2-tz.c | 8 +- > hw/arm/mps2.c | 2 +- > hw/arm/msf2-soc.c | 6 +- > hw/arm/musicpal.c | 3 +- > hw/arm/npcm7xx.c | 16 +- > hw/arm/realview.c | 25 ++- > hw/arm/sbsa-ref.c | 4 +- > hw/arm/stellaris.c | 30 +++- > hw/arm/versatilepb.c | 15 +- > hw/arm/vexpress.c | 4 +- > hw/arm/virt.c | 4 +- > hw/arm/xilinx_zynq.c | 11 +- > hw/arm/xlnx-versal.c | 7 +- > hw/arm/xlnx-zynqmp.c | 8 +- > hw/cris/axis_dev88.c | 9 +- > hw/hppa/machine.c | 7 +- > hw/i386/pc.c | 33 ++-- > hw/i386/pc_piix.c | 2 +- > hw/i386/pc_q35.c | 2 +- > hw/loongarch/virt.c | 4 +- > hw/m68k/mcf5208.c | 19 +-- > hw/m68k/q800.c | 29 ++-- > hw/microblaze/petalogix_ml605_mmu.c | 3 +- > hw/microblaze/petalogix_s3adsp1800_mmu.c | 3 +- > hw/mips/fuloong2e.c | 16 +- > hw/mips/jazz.c | 15 +- > hw/mips/loongson3_virt.c | 4 +- > hw/mips/malta.c | 15 +- > hw/mips/mipssim.c | 13 +- > hw/net/etraxfs_eth.c | 5 +- > hw/net/lan9118.c | 5 +- > hw/net/lasi_i82596.c | 3 +- > hw/net/smc91c111.c | 5 +- > hw/openrisc/openrisc_sim.c | 18 +-- > hw/pci/pci.c | 73 +++------ > hw/ppc/e500.c | 4 +- > hw/ppc/mac_newworld.c | 4 +- > hw/ppc/mac_oldworld.c | 4 +- > hw/ppc/ppc440_bamboo.c | 14 +- > hw/ppc/prep.c | 8 +- > hw/ppc/spapr.c | 18 +-- > hw/riscv/microchip_pfsoc.c | 14 +- > hw/riscv/sifive_u.c | 7 +- > hw/s390x/s390-virtio-ccw.c | 11 +- > hw/sh4/r2d.c | 6 +- > hw/sparc/sun4m.c | 20 ++- > hw/sparc64/sun4u.c | 27 +--- > hw/xen/xen-bus.c | 6 +- > hw/xen/xen_devconfig.c | 25 --- > hw/xenpv/xen_machine_pv.c | 9 -- > hw/xtensa/virt.c | 4 +- > hw/xtensa/xtfpga.c | 13 +- > include/hw/cris/etraxfs.h | 2 +- > include/hw/i386/pc.h | 4 +- > include/hw/net/lan9118.h | 2 +- > include/hw/net/ne2000-isa.h | 2 - > include/hw/net/smc91c111.h | 2 +- > include/hw/pci/pci.h | 7 +- > include/hw/xen/xen-bus.h | 2 +- > include/hw/xen/xen-legacy-backend.h | 1 - > include/net/net.h | 18 +-- > net/net.c | 253 +++++++++++++++++++++++++------ > system/globals.c | 2 - > tests/qtest/npcm7xx_emc-test.c | 18 +-- > 79 files changed, 479 insertions(+), 550 deletions(-) > > > >
On Wed, Jan 24, 2024 at 9:14 PM David Woodhouse <dwmw2@infradead.org> wrote: > > Hi Jason, > > I think this series probably lives or dies with you. I think it's a > worthwhile cleanup, but I no longer have an immediate need for it; I > shipped a slightly ugly workaround in QEMU 8.2. > > Please could you let me know if it's worth persisting with it? Yes it is. Thomas, I remember you've done tweaks for -nic in the past. would you like to review this series? Thanks > > Thanks. > > On Mon, 2024-01-08 at 20:26 +0000, David Woodhouse wrote: > > > > Most platforms iterating directly over the nd_table[] are doing one of > > two things. Either they are creating the NIC for their platform and want > > to find a matching -nic configuration for it, if such exists. Or they > > are only going to create that platform NIC if a matching config *does* > > exist. > > > > All of those can be converted to the new qemu_configure_nic_device() > > and qemu_create_nic_device() functions. The latter of which will call > > qdev_new() to create the device (and apply the config) if a matching > > NIC config does exist for it. The existing behaviour of each platform > > has been preserved for now, despite it being apparently fairly random. > > > > PCI and indeed XenBus can use a qemu_create_nic_bus_devices() which will > > create all NICs that live on a given bus type. That covers most > > platforms, but some PCI platforms do something special with the first > > NIC of a given type, placing it in the slot where it would have been on > > the real hardware. There were various inconsistencies in the way the > > platforms did so, and whether they cared what model the NIC was. Those > > subtle behavioural changes I *have* allowed to change, and now the > > pci_init_nic_slot() function will pick the first NIC that the user > > specified which isn't explicitly *not* the default type, and put that > > in the specified slot. > > > > The tests for npcm7xx used to lament that they had to instantiate both > > NICs even when they wanted to test only the second, because there was > > no way to specify which hardware devices gets which configuration. I > > made that untrue, by allowing 'emc0' and 'emc1' aliases, and fixed up > > the test accordingly. > > > > There are one or two special cases which want to do special things with > > the MAC address of the primary NIC, to set up a system identification > > (or force it to use an Apple OUI, in the case of m68k/q400). All those > > work out relatively cleanly too. > > > > And I can clean up the ugly patch which fixed up the Xen network device > > handling, and replace it with a simple call to the new > > qemu_create_nic_bus_devices() function. > > > > I suspect that we can remove the pci_init_nic_devices() from platform > > code and just do it later, except for platforms which *care* which > > PCI bus the dynamic devices go on (is that just sun4u which puts its > > primary NIC onto a different bus?). > > > > Finally, while we're at it, clean up -nic model=help to only print > > the device models which are actually usable on the given platform > > rather than just listing them *all*. > > > > And now we can make nd_table[] and nb_nics static in net/net.c because > > nothing else has any business poking at them directly. > > > > v3: Rebase to 8.2 > > > > v2: Some build fixes after better coverage testing, revert the Xen fix > > in this series because I'm putting the less invasive hack into 8.2 > > (hopefully). > > > > David Woodhouse (46): > > net: add qemu_{configure,create}_nic_device(), qemu_find_nic_info() > > net: report list of available models according to platform > > net: add qemu_create_nic_bus_devices() > > hw/pci: add pci_init_nic_devices(), pci_init_nic_in_slot() > > hw/i386/pc: use qemu_get_nic_info() and pci_init_nic_devices() > > hw/xen: use qemu_create_nic_bus_devices() to instantiate Xen NICs > > hw/alpha/dp264: use pci_init_nic_devices() > > hw/arm/sbsa-ref: use pci_init_nic_devices() > > hw/arm/virt: use pci_init_nic_devices() > > hw/hppa: use pci_init_nic_devices() > > hw/loongarch: use pci_init_nic_devices() > > hw/mips/fuloong2e: use pci_init_nic_devices() > > hw/mips/malta: use pci_init_nic_devices() > > hw/mips/loongson3_virt: use pci_init_nic_devices() > > hw/ppc/prep: use pci_init_nic_devices() > > hw/ppc/spapr: use qemu_get_nic_info() and pci_init_nic_devices() > > hw/ppc: use pci_init_nic_devices() > > hw/sh4/r2d: use pci_init_nic_devices() > > hw/sparc64/sun4u: use pci_init_nic_devices() > > hw/xtensa/virt: use pci_init_nic_devices() > > hw/arm/allwinner: use qemu_configure_nic_device() > > hw/arm/aspeed: use qemu_configure_nic_device() > > hw/arm/exynos4: use qemu_create_nic_device() > > hw/arm/fsl: use qemu_configure_nic_device() > > hw/net/smc91c111: use qemu_configure_nic_device() > > hw/net/lan9118: use qemu_configure_nic_device() > > hw/arm/highbank: use qemu_create_nic_device() > > hw/arm/npcm7xx: use qemu_configure_nic_device, allow emc0/emc1 as aliases > > hw/arm/stellaris: use qemu_find_nic_info() > > hw/arm: use qemu_configure_nic_device() > > hw/net/etraxfs-eth: use qemu_configure_nic_device() > > hw/m68k/mcf5208: use qemu_create_nic_device() > > hw/m68k/q800: use qemu_find_nic_info() > > hw/microblaze: use qemu_configure_nic_device() > > hw/mips/mipssim: use qemu_create_nic_device() > > hw/mips/jazz: use qemu_find_nic_info() > > hw/net/lasi_i82596: use qemu_configure_nic_device() > > hw/openrisc/openrisc_sim: use qemu_create_nic_device() > > hw/riscv: use qemu_configure_nic_device() > > hw/s390x/s390-virtio-ccw: use qemu_create_nic_device() > > hw/sparc/sun4m: use qemu_find_nic_info() > > hw/xtensa/xtfpga: use qemu_create_nic_device() > > net: remove qemu_check_nic_model() > > hw/pci: remove pci_nic_init_nofail() > > net: remove qemu_show_nic_models(), qemu_find_nic_model() > > net: make nb_nics and nd_table[] static in net/net.c > > > > hw/alpha/dp264.c | 4 +- > > hw/arm/allwinner-a10.c | 6 +- > > hw/arm/allwinner-h3.c | 6 +- > > hw/arm/allwinner-r40.c | 27 +--- > > hw/arm/aspeed.c | 9 +- > > hw/arm/exynos4_boards.c | 6 +- > > hw/arm/fsl-imx25.c | 2 +- > > hw/arm/fsl-imx6.c | 2 +- > > hw/arm/fsl-imx6ul.c | 2 +- > > hw/arm/fsl-imx7.c | 2 +- > > hw/arm/gumstix.c | 6 +- > > hw/arm/highbank.c | 12 +- > > hw/arm/integratorcp.c | 5 +- > > hw/arm/kzm.c | 4 +- > > hw/arm/mainstone.c | 3 +- > > hw/arm/mps2-tz.c | 8 +- > > hw/arm/mps2.c | 2 +- > > hw/arm/msf2-soc.c | 6 +- > > hw/arm/musicpal.c | 3 +- > > hw/arm/npcm7xx.c | 16 +- > > hw/arm/realview.c | 25 ++- > > hw/arm/sbsa-ref.c | 4 +- > > hw/arm/stellaris.c | 30 +++- > > hw/arm/versatilepb.c | 15 +- > > hw/arm/vexpress.c | 4 +- > > hw/arm/virt.c | 4 +- > > hw/arm/xilinx_zynq.c | 11 +- > > hw/arm/xlnx-versal.c | 7 +- > > hw/arm/xlnx-zynqmp.c | 8 +- > > hw/cris/axis_dev88.c | 9 +- > > hw/hppa/machine.c | 7 +- > > hw/i386/pc.c | 33 ++-- > > hw/i386/pc_piix.c | 2 +- > > hw/i386/pc_q35.c | 2 +- > > hw/loongarch/virt.c | 4 +- > > hw/m68k/mcf5208.c | 19 +-- > > hw/m68k/q800.c | 29 ++-- > > hw/microblaze/petalogix_ml605_mmu.c | 3 +- > > hw/microblaze/petalogix_s3adsp1800_mmu.c | 3 +- > > hw/mips/fuloong2e.c | 16 +- > > hw/mips/jazz.c | 15 +- > > hw/mips/loongson3_virt.c | 4 +- > > hw/mips/malta.c | 15 +- > > hw/mips/mipssim.c | 13 +- > > hw/net/etraxfs_eth.c | 5 +- > > hw/net/lan9118.c | 5 +- > > hw/net/lasi_i82596.c | 3 +- > > hw/net/smc91c111.c | 5 +- > > hw/openrisc/openrisc_sim.c | 18 +-- > > hw/pci/pci.c | 73 +++------ > > hw/ppc/e500.c | 4 +- > > hw/ppc/mac_newworld.c | 4 +- > > hw/ppc/mac_oldworld.c | 4 +- > > hw/ppc/ppc440_bamboo.c | 14 +- > > hw/ppc/prep.c | 8 +- > > hw/ppc/spapr.c | 18 +-- > > hw/riscv/microchip_pfsoc.c | 14 +- > > hw/riscv/sifive_u.c | 7 +- > > hw/s390x/s390-virtio-ccw.c | 11 +- > > hw/sh4/r2d.c | 6 +- > > hw/sparc/sun4m.c | 20 ++- > > hw/sparc64/sun4u.c | 27 +--- > > hw/xen/xen-bus.c | 6 +- > > hw/xen/xen_devconfig.c | 25 --- > > hw/xenpv/xen_machine_pv.c | 9 -- > > hw/xtensa/virt.c | 4 +- > > hw/xtensa/xtfpga.c | 13 +- > > include/hw/cris/etraxfs.h | 2 +- > > include/hw/i386/pc.h | 4 +- > > include/hw/net/lan9118.h | 2 +- > > include/hw/net/ne2000-isa.h | 2 - > > include/hw/net/smc91c111.h | 2 +- > > include/hw/pci/pci.h | 7 +- > > include/hw/xen/xen-bus.h | 2 +- > > include/hw/xen/xen-legacy-backend.h | 1 - > > include/net/net.h | 18 +-- > > net/net.c | 253 +++++++++++++++++++++++++------ > > system/globals.c | 2 - > > tests/qtest/npcm7xx_emc-test.c | 18 +-- > > 79 files changed, 479 insertions(+), 550 deletions(-) > > > > > > > > >
On 25/01/2024 01.38, Jason Wang wrote: > On Wed, Jan 24, 2024 at 9:14 PM David Woodhouse <dwmw2@infradead.org> wrote: >> >> Hi Jason, >> >> I think this series probably lives or dies with you. I think it's a >> worthwhile cleanup, but I no longer have an immediate need for it; I >> shipped a slightly ugly workaround in QEMU 8.2. >> >> Please could you let me know if it's worth persisting with it? > > Yes it is. Agreed! It would be great of getting rid of the ugly global nd_table[] finally! > Thomas, I remember you've done tweaks for -nic in the past. would you > like to review this series? I tried to skim through the patches today, some nits here and there, but nothing sever, so IMHO it should be fine once they are fixed. HTH, Thomas
On Fri, 2024-01-26 at 17:51 +0100, Thomas Huth wrote: > On 25/01/2024 01.38, Jason Wang wrote: > > On Wed, Jan 24, 2024 at 9:14 PM David Woodhouse <dwmw2@infradead.org> wrote: > > > > > > Hi Jason, > > > > > > I think this series probably lives or dies with you. I think it's a > > > worthwhile cleanup, but I no longer have an immediate need for it; I > > > shipped a slightly ugly workaround in QEMU 8.2. > > > > > > Please could you let me know if it's worth persisting with it? > > > > Yes it is. > > Agreed! It would be great of getting rid of the ugly global nd_table[] finally! > > > Thomas, I remember you've done tweaks for -nic in the past. would you > > like to review this series? > > I tried to skim through the patches today, some nits here and there, but > nothing sever, so IMHO it should be fine once they are fixed. Thank you for the reviews! I think I've covered everything in v4 which I posted yesterday, except possible one Reviewed-by: tag went AWOL which I'll round up for next time.