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2015-01-07PPC: e500 pci host: Add support for ATMUsAlexander Graf
The e500 PCI controller has configurable windows that allow a guest OS to selectively map parts of the PCI bus space to CPU address space and to selectively map parts of the CPU address space for DMA requests into PCI visible address ranges. So far, we've simply assumed that this mapping is 1:1 and ignored it. However, the PCICSRBAR (CCSR mapped in PCI bus space) always has to live inside the first 32bits of address space. This means if we always treat all mappings as 1:1, this map will collide with our RAM map from the CPU's point of view. So this patch adds proper ATMU support which allows us to keep the PCICSRBAR below 32bits local to the PCI bus and have another, different window to PCI BARs at the upper end of address space. We leverage this on e500plat though, mpc8544ds stays virtually 1:1 like it was before, but now also goes via ATMU. With this patch, I can run guests with lots of RAM and not coincidently access MSI-X mappings while I really want to access RAM. Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-12Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
- Memory: improve error reporting and avoid crashes on hotplug - Build: fixing block/iscsi.so and ranlib warnings on Mac OS X - Migration fixes for x86 - The odd KVM patch. # gpg: Signature made Thu 11 Sep 2014 11:21:10 BST using RSA key ID 9B4D86F2 # gpg: Good signature from "Paolo Bonzini <pbonzini@redhat.com>" # gpg: aka "Paolo Bonzini <bonzini@gnu.org>" * remotes/bonzini/tags/for-upstream: (21 commits) gdbstub: init mon_chr through qemu_chr_alloc pckbd: adding new fields to vmstate mc146818rtc: add missed field to vmstate piix: do not set irq while loading vmstate serial: fixing vmstate for save/restore parallel: adding vmstate for save/restore fdc: adding vmstate for save/restore cpu: init vmstate for ticks and clock offset apic_common: vapic_paddr synchronization fix vl: use QLIST_FOREACH_SAFE to visit change state handlers exec: add parameter errp to gethugepagesize exec: report error when memory < hpagesize hostmem-ram: don't exit qemu if size of memory-backend-ram is way too big memory: add parameter errp to memory_region_init_rom_device memory: add parameter errp to memory_region_init_ram exec: add parameter errp to qemu_ram_alloc and qemu_ram_alloc_from_ptr rules.mak: Fix DSO build by pulling in archive symbols util: Don't link host-utils.o if it's empty util: Move general qemu_getauxval to util/getauxval.c trace: Only link generated-tracers.o with "simple" backend ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-11piix: do not set irq while loading vmstatePavel Dovgalyuk
This patch avoids setting an irq while loading the state of the ISA bridge. Because the i8259 has not been deserialized yet, raising an interrupt could bring the system out-of-sync with the migration source. For example, the migration source could have masked the interrupt in the i8259. On the destination, the i8259 device model would not know that yet and would trigger an interrupt in the CPU. This patch eliminates setting the irq and just restores the calculated state fields in post_load function. Interrupt state will be deserialized separately through the IRR field of the i8259. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-09memory: add parameter errp to memory_region_init_ramHu Tao
Add parameter errp to memory_region_init_ram and update all call sites to pass in &error_abort. Signed-off-by: Hu Tao <hutao@cn.fujitsu.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-09apb: implement PCI bus error interrupt map registersMark Cave-Ayland
Both OpenBSD and FreeBSD SPARC64 attempt to read the interrupt map from the hardware and will fail if the correct ino isn't present. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2014-08-28intel-iommu: add context-cache to cache context-entryLe Tan
Add context-cache to cache context-entry encountered on a page-walk. Each VTDAddressSpace has a member of VTDContextCacheEntry which represents an entry in the context-cache. Since devices with different bus_num and devfn have their respective VTDAddressSpace, this will be a good way to reference the cached entries. Each VTDContextCacheEntry will have a context_cache_gen and the cached entry is valid only when context_cache_gen equals IntelIOMMUState.context_cache_gen. Signed-off-by: Le Tan <tamlokveer@gmail.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-08-28intel-iommu: fix coding style issues around in q35.c and machine.cLe Tan
Fix coding style issues around in hw/pci-host/q35.c and hw/core/machine.c. Signed-off-by: Le Tan <tamlokveer@gmail.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-08-28intel-iommu: add Intel IOMMU emulation to q35 and add a machine option ↵Le Tan
"iommu" as a switch Add Intel IOMMU emulation to q35 chipset and expose it to the guest. 1. Add a machine option. Users can use "-machine iommu=on|off" in the command line to enable/disable Intel IOMMU. The default is off. 2. Accroding to the machine option, q35 will initialize the Intel IOMMU and use pci_setup_iommu() to setup q35_host_dma_iommu() as the IOMMU function for the pci bus. 3. q35_host_dma_iommu() will return different address space according to the bus_num and devfn of the device. Signed-off-by: Le Tan <tamlokveer@gmail.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-08-28iommu: add is_write as a parameter to the translate function of ↵Le Tan
MemoryRegionIOMMUOps Add a bool variable is_write as a parameter to the translate function of MemoryRegionIOMMUOps to indicate the operation of the access. It can be used for correct fault reporting from within the callback. Change the interface of related functions. Signed-off-by: Le Tan <tamlokveer@gmail.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-08-18Merge remote-tracking branch 'remotes/mcayland/qemu-sparc' into stagingPeter Maydell
* remotes/mcayland/qemu-sparc: target-sparc64: implement Short Floating-Point Store Instructions apb: add IOMMU flush register implementation sun4u: switch second PCI-ebus bridge BAR over to PCI IO space Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-08-17apb: add IOMMU flush register implementationMark Cave-Ayland
The IOMMU flush register is a write-only register used to remove entries from the hardware TLB. Allow guest writes to this register as a no-op, and return a value of 0 for reads. This fixes IOMMU DMA operations under NetBSD SPARC64. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2014-08-15pci-host: update uncorresponding descriptionGonglei
Signed-off-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-08-15pci-host: update obsolete reference about piix_pci.cGonglei
piix_pci.c has been renamed into piix.c at commit c0907c9e6417cb959dfd9ef6873221536ec91351 update the obsolete reference. Signed-off-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-07-07prep: Remove PCI memory hack related to OpenHack'WareHervé Poussineau
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-06-27uninorth: Fix PCI hole sizeBALATON Zoltan
Fix PCI hole size to match that what is found on real hardware. (OpenBIOS already uses the correct length.) Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-06-20apb: Fix out-of-bounds array write accessStefan Weil
The array regs is declared with IOMMU_NREGS (3) elements and accessed using IOMMU_CTRL (0) and IOMMU_BASE (8). In most cases, those values are right shifted before being used as an index which results in indices 0 and 1. In one case, this right shift was missing for IOMMU_BASE which results in an out-of-bounds write access with index 8. The patch adds the missing shift operation also for IOMMU_CTRL where it is needed only for cosmetic reasons. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2014-06-16hw/pci-host/ppce500: Fix typo in vmstate definitionPeter Maydell
Fix a typo in the ppce500_pci vmstate definition which meant that we were migrating the struct pci_inbound using the vmstate for pci_outbound. Fortunately the two structures have exactly the same format at the moment (four uint32_ts) so this was harmless, and we can correcting the typo without a migration compatibility break because the vmstate name doesn't go out on the wire. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-06-16PPC: e500: implement PCI INTx routingBharat Bhushan
This patch adds pci pin to irq_num routing callback. This callback is called from pci_device_route_intx_to_irq to find which pci device maps to which irq. This fix is required for pci-device passthrough using vfio. Also without this patch we gets below prints " PCI: Bug - unimplemented PCI INTx routing (e500-pcihost) qemu-system-ppc64: PCI: Bug - unimplemented PCI INTx routing (e500-pcihost) " and Legacy interrupt does not work with pci device passthrough. Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> [agraf: remove double semicolon] Signed-off-by: Alexander Graf <agraf@suse.de>
2014-06-16PPC: e500: some pci related cleanupBharat Bhushan
- Use PCI_NUM_PINS rather than hardcoding - use "pin" wherever possible Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-06-16savevm: Remove all the unneeded version_minimum_id_old (x86)Juan Quintela
After previous Peter patch, they are redundant. This way we don't assign them except when needed. Once there, there were lots of case where the ".fields" indentation was wrong: .fields = (VMStateField []) { and .fields = (VMStateField []) { Change all the combinations to: .fields = (VMStateField[]){ The biggest problem (appart from aesthetics) was that checkpatch complained when we copy&pasted the code from one place to another. Signed-off-by: Juan Quintela <quintela@redhat.com> Acked-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-16savevm: Remove all the unneeded version_minimum_id_old (ppc)Juan Quintela
After previous Peter patch, they are redundant. This way we don't assign them except when needed. Once there, there were lots of case where the ".fields" indentation was wrong: .fields = (VMStateField []) { and .fields = (VMStateField []) { Change all the combinations to: .fields = (VMStateField[]){ The biggest problem (appart from aesthetics) was that checkpatch complained when we copy&pasted the code from one place to another. Signed-off-by: Juan Quintela <quintela@redhat.com> Acked-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2014-06-10apb: Fix compiler warnings (large constants)Stefan Weil
Both constants need more than 32 bit. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-06-05Merge remote-tracking branch 'remotes/mcayland/qemu-sparc' into stagingPeter Maydell
* remotes/mcayland/qemu-sparc: apb: implement IOMMU translation for PCI host bridge apb: handle reading/writing of IOMMU control registers apb: fix IOMMU register sizes apb: Move IOMMU registers into a separate IOMMUState struct tcx: move initialisation from realizefn to initfn tcx: move initialisation from SysBusDevice class to TCX class realizefn cg3: add extra check to prevent CG3 register array overflow cg3: move initialisation from realizefn to initfn Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-06-05apb: implement IOMMU translation for PCI host bridgeMark Cave-Ayland
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2014-06-05apb: handle reading/writing of IOMMU control registersMark Cave-Ayland
While the registers are documented as being 64-bit, Linux seems to access them in two halves as 2 x 32-bit accesses. Make sure that we can correctly handle this case. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2014-06-05apb: fix IOMMU register sizesMark Cave-Ayland
According to the referenced documentation, the IOMMU has 3 64-bit registers consisting of a control register, base register and flush register. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2014-06-05apb: Move IOMMU registers into a separate IOMMUState structMark Cave-Ayland
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2014-05-21pcie_host: Turn pcie_host_init() into an instance_initAndreas Färber
This assures the trivial field initialization is applied for any derived type - currently only Q35PCIHost. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-05-14savevm: Remove all the unneeded version_minimum_id_old (rest)Juan Quintela
After previous Peter patch, they are redundant. This way we don't assign them except when needed. Once there, there were lots of case where the ".fields" indentation was wrong: .fields = (VMStateField []) { and .fields = (VMStateField []) { Change all the combinations to: .fields = (VMStateField[]){ The biggest problem (appart from aesthetics) was that checkpatch complained when we copy&pasted the code from one place to another. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2014-04-08hw/pci-host/prep: Don't reverse IO accesses on bigendian hostsPeter Maydell
The raven_io_read() and raven_io_write() functions pass and return values in little-endian format (since the IO op struct is marked DEVICE_LITTLE_ENDIAN); however they were storing the values in the buffer to pass to address_space_read/write() in host-endian order, which meant that on big-endian hosts the values were inadvertently reversed. Use the *_le_p() accessors instead so that we are consistent regardless of host endianness. Strictly speaking the byte order of the buffer for address_space_rw() is target byte order (which for PPC will be BE) but it doesn't actually matter as long as we are consistent about the marking on the IO op struct and which stl_*_p(). This bug was probably introduced due to confusion caused by the two different versions of ldl_p() and friends: bswap.h defines versions meaning "host endianness access" cpu-all.h defines versions meaning "target endianness access" As a target-independent source file prep.c gets the bswap.h versions; the very similar looking code in ioport.c is compiled per-target and gets the cpu-all.h versions. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1396972271-22660-1-git-send-email-peter.maydell@linaro.org Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-03-27hw/pci-host/apb.c: Avoid shifting left into sign bitPeter Maydell
Add U suffix to avoid undefined behaviour. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-03-20raven: Use raven_ for all function prefixesHervé Poussineau
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-03-20raven: Fix PCI bus accesses with size > 1Hervé Poussineau
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Reviewed-by: Artyom Tarasenko <atar4qemu@gmail.com> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-03-20raven: Add PCI bus mastering address spaceHervé Poussineau
This has been tested on Linux 2.4/PPC with the lsi53c895a SCSI adapter. Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-03-20raven: Set a correct PCI memory regionHervé Poussineau
PCI memory region is 0x3f000000 bytes starting at 0xc0000000. However, keep compatibility with Open Hack'Ware expectations by adding a hack for Open Hack'Ware display. Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-03-20raven: Set a correct PCI I/O memory regionHervé Poussineau
PCI I/O region is 0x3f800000 bytes starting at 0x80000000. Do not use global QEMU I/O region, which is only 64KB. Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-03-20raven: Implement non-contiguous I/O regionHervé Poussineau
Remove now duplicated code from prep board. Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-03-20raven: Rename intack region to pci_intackHervé Poussineau
Regions added subsequently will also have the pci_ prefix. Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-03-13raven: Move BIOS loading from board code to PCI hostHervé Poussineau
Raven datasheet explains where firmware lives in system memory, so do it there instead of in board code. Other boards using the same PCI host will not have to copy the firmware loading code. Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> [AF: Drop BIOS size workaround in favor of replacing our firmware blob] Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-03-11q35: Correct typo BRDIGE -> BRIDGEBALATON Zoltan
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-03-09pam: partly fix write-only modeHervé Poussineau
In write-only mode, writes are forwarded to RAM, while reads should not be handled (ie should return 0xff). Assume that in this mode, no read access is ever done, as they shouldn't give any sensible result. So, in write-only mode, alias PAM region to RAM, instead of PCI memory (which can even be mapped to some device!) This fixes Award BIOS, which use this mode to shadow system BIOS and video BIOS. Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-02-13Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into stagingPeter Maydell
acpi,pc,pci fixes and enhancements Most changes here are hotplug related: This merges hotplug infrastructure changes by Igor, some acpi related fixes, and PC fixes. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # gpg: Signature made Mon 10 Feb 2014 09:13:26 GMT using RSA key ID D28D5469 # gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" # gpg: aka "Michael S. Tsirkin <mst@redhat.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67 # Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469 * remotes/mst/tags/for_upstream: ACPI: Remove commented-out code from HPET._CRS hw/pci: switch to a generic hotplug handling for PCIDevice pci/pcie: convert PCIE hotplug to use hotplug-handler API pci/shpc: convert SHPC hotplug to use hotplug-handler API acpi/piix4pm: convert ACPI PCI hotplug to use hotplug-handler API qdev:pci: refactor PCIDevice to use generic "hotpluggable" property hw/acpi: move typeinfo to the file end qdev: add "hotpluggable" property to Device qdev: add to BusState "hotplug-handler" link define hotplug interface loader: document that errno is set pc.c: better error message on initrd sizing failure pc_piix: enable legacy hotplug for Xen qtest: don't report signals if qtest driver enabled hw:piix4:acpi: reuse pcihp code for legacy PCI hotplug pcihp: remove unused AcpiPciHpPciStatus.device_present field pcihp: make pci_read() mmio calback compatible with legacy ACPI hotplug pcihp: make PCI hotplug mmio handlers indifferent to PCI_HOTPLUG_ADDR pcihp: replace enable|disable_device() with oneliners pcihp: reduce number of device check events Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-02-10qdev:pci: refactor PCIDevice to use generic "hotpluggable" propertyIgor Mammedov
Get rid of PCIDevice specific PCIDeviceClass.no_hotplug and use generic DeviceClass.hotpluggable field instead. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-02-09raven: Use constant PCI_NUM_PINS instead of 4Hervé Poussineau
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2014-01-10Merge remote-tracking branch 'mst/tags/for_anthony' into stagingAnthony Liguori
acpi,pci,pc,fedora,virtio fixes and enhancements This includes some Preparatory patches for cpu hotplug for q25 and memory hotplug by Igor, tests and memory mapping change by Laszlo and pci reset cleanup by Paolo. There are also some fixes for fedora and virtio: included here since they are test blockers for me. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # gpg: Signature made Mon 23 Dec 2013 08:07:18 AM PST using RSA key ID D28D5469 # gpg: Can't check signature: public key not found * mst/tags/for_anthony: target-arm: fix build with gcc 4.8.2 virtio: add back call to virtio_bus_device_unplugged piix: fix 32bit pci hole qdev: switch reset to post-order qdev: allow both pre- and post-order vists in qdev walking functions pci: clean up resetting of IRQs pci: do not export pci_bus_reset ACPI/DSDT-CPU: cleanup bogus comment ACPI: Q35 DSDT: fix CPU hotplug GPE0.2 handler acpi: ich9: allow guest to clear SCI rised by GPE acpi: factor out common pm_update_sci() into acpi core acpi: piix4: remove not needed GPE0 mask i440fx-test: verify firmware under 4G and 1M, both -bios and -pflash i440fx-test: generate temporary firmware blob i440fx-test: give each GTest case its own qtest i440fx-test: qtest_start() should be paired with qtest_end() hw/i386/pc_sysfw: support two flash drives pc_piix: document gigabyte_align piix: gigabyte alignment for ram Message-id: 1387815007-1272-1-git-send-email-mst@redhat.com Signed-off-by: Anthony Liguori <aliguori@amazon.com>
2013-12-23piix: fix 32bit pci holeGerd Hoffmann
Make the 32bit pci hole start at end of ram, so all possible address space is covered. We used to try and make addresses aligned so they are easier to cover with MTRRs, but since they are cosmetic on KVM, this is probably not worth worrying about. Of course the firmware can use less than that. Leaving space unused is no problem, mapping pci bars outside the hole causes problems though. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-12-23piix3 piix4: Clean up use of cannot_instantiate_with_device_add_yetMarkus Armbruster
A PIIX3/PIIX4 southbridge has multiple functions. We model each function as a separate qdev. Two of them need some special wiring set up in pc_init1() or mips_malta_init() to work: the ISA bridge at 01.0, and the SMBus controller at 01.3. The IDE controller at 01.1 (piix3-ide, piix3-ide-xen, piix4-ide) has always had cannot_instantiate_with_device_add_yet set, but there is no obvious reason why device_add could not work for them. Drop it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-12-23pci-host: Consistently set cannot_instantiate_with_device_add_yetMarkus Armbruster
Many PCI host bridges consist of a sysbus device and a PCI device. You need both for the thing to work. Arguably, these bridges should be modelled as a single, composite devices instead of pairs of seemingly independent devices you can only use together, but we're not there, yet. Since the sysbus part can't be instantiated with device_add, yet, permitting it with the PCI part is useless. We shouldn't offer useless options to the user, so let's set cannot_instantiate_with_device_add_yet for them. It's already set for Bonito, Grackle, i440FX and Raven. Document why. Set it for the others: dec-21154, e500-host-bridge, gt64120_pci, mch, pbm-pci, ppc4xx-host-bridge, sh_pci_host, u3-agp, uni-north-agp, uni-north-internal-pci, uni-north-pci, and versatile_pci_host. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-12-23sysbus: Set cannot_instantiate_with_device_add_yetMarkus Armbruster
device_add plugs devices into suitable bus. For "real" buses, that actually connects the device. For sysbus, the connections need to be made separately, and device_add can't do that. The device would be left unconnected, and could not possibly work. Quite a few, but not all sysbus devices already set cannot_instantiate_with_device_add_yet in their class init function. Set it in their abstract base's class init function sysbus_device_class_init(), and remove the now redundant assignments from device class init functions. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-12-23qdev: Replace no_user by cannot_instantiate_with_device_add_yetMarkus Armbruster
In an ideal world, machines can be built by wiring devices together with configuration, not code. Unfortunately, that's not the world we live in right now. We still have quite a few devices that need to be wired up by code. If you try to device_add such a device, it'll fail in sometimes mysterious ways. If you're lucky, you get an unmysterious immediate crash. To protect users from such badness, DeviceClass member no_user used to make device models unavailable with -device / device_add, but that regressed in commit 18b6dad. The device model is still omitted from help, but is available anyway. Attempts to fix the regression have been rejected with the argument that the purpose of no_user isn't clear, and it's prone to misuse. This commit clarifies no_user's purpose. Anthony suggested to rename it cannot_instantiate_with_device_add_yet_due_to_internal_bugs, which I shorten somewhat to keep checkpatch happy. While there, make it bool. Every use of cannot_instantiate_with_device_add_yet gets a FIXME comment asking for rationale. The next few commits will clean them all up, either by providing a rationale, or by getting rid of the use. With that done, the regression fix is hopefully acceptable. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>