[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v1 0/1] Q35 Support
Q35 support using Qemu's device emulation. I based the patches from 2017 found on the mailing list here: https://lists.xenproject.org/archives/html/xen-devel/2018-03/msg01176.html I have been using a version of these patches on Xen 4.16 with Qemu version 4.1 for over 6 months. The guest VMs are very stable, and PCIe PT is working as was designed (all of the PCIe devices are on the root PCIe device). I have successfully passed through GPUs, NICs, etc. I was asked by those in the community to attempt to once again upstream the patches. I have them working with Seabios and OVMF (patches are needed to OVMF which I will be sending to the mailing list). I will be sending my Qemu patches to their mailing list in hopes of getting everything upstreamed. The Qemu patches allow for the xenvbd to properly unplug the AHCI SATA device, and all xen pv windows drivers work as intended. I used the original author of the patches to get a majority of this to work: Alexey Gerasimenko. I fixed the patches to be in line with the upstream Qemu and Xen versions. Any original issues may still exist; however, I am sure in time they can be improved. If the code doesn't exist then they can't be actively looked at by the community. I am not an expert on the Q35 chipset or PCIe technology. This is my first patch to this mailing list. Recap of changes to Qemu, only here for reference: pc/xen: Xen Q35 support: provide IRQ handling for PCI devices pc/q35: Apply PCI bus BSEL property for Xen PCI device hotplug acpi/ich9: Multiple fixes for S3 support acpi/pcihp: Allow for machines to hotplug when using Xen isa/lpc_ich9: Write lpc configuration for xen IRQs q35/acpi/xen: Provide ACPI PCI hotplug interface for Xen on Q35 q35/xen: Add Xen platform device support for Q35 q35: Fix incorrect values for PCIEXBAR masks xen/pt: XenHostPCIDevice: provide functions for PCI Capabilities and PCIe Extended Capabilities enumeration xen/pt: avoid reading PCIe device type and cap version multiple times xen/pt: determine the legacy/PCIe mode for a passed through device xen/pt: Xen PCIe passthrough support for Q35: bypass PCIe topology check xen/pt: add support for PCIe Extended Capabilities and larger config space xen/pt: handle PCIe Extended Capabilities Next register xen/pt: allow to hide PCIe Extended Capabilities xen/pt: add Vendor-specific PCIe Extended Capability descriptor and sizing xen/pt: add fixed-size PCIe Extended Capabilities descriptors xen/pt: add AER PCIe Extended Capability descriptor and sizing xen/pt: add descriptors and size calculation for RCLD/ACS/PMUX/DPA/MCAST/TPH/DPC PCIe Extended Capabilities xen/pt: add Resizable BAR PCIe Extended Capability descriptor and sizing xen/pt: add VC/VC9/MFVC PCIe Extended Capabilities descriptors and sizing Changes that would be going to upstream Qemu: hw/acpi/ich9.c | 22 +- hw/acpi/pcihp.c | 6 +- hw/core/machine.c | 19 + hw/i386/pc_piix.c | 3 +- hw/i386/pc_q35.c | 39 +- hw/i386/xen/xen-hvm.c | 7 +- hw/i386/xen/xen_platform.c | 19 +- hw/ide/ahci.c | 2 +- hw/isa/lpc_ich9.c | 53 +- hw/isa/piix3.c | 2 +- hw/pci-host/q35.c | 28 +- hw/pci/pci.c | 17 + hw/xen/xen-host-pci-device.c | 106 +++- hw/xen/xen-host-pci-device.h | 6 +- hw/xen/xen_pt.c | 49 +- hw/xen/xen_pt.h | 19 +- hw/xen/xen_pt_config_init.c | 1103 ++++++++++++++++++++++++++++++--- include/hw/acpi/ich9.h | 1 + include/hw/acpi/pcihp.h | 2 + include/hw/boards.h | 1 + include/hw/i386/pc.h | 3 + include/hw/pci-host/q35.h | 4 +- include/hw/pci/pci.h | 3 + include/hw/southbridge/ich9.h | 1 + include/hw/xen/xen.h | 4 +- qemu-options.hx | 1 + softmmu/datadir.c | 1 - softmmu/qdev-monitor.c | 3 +- stubs/xen-hw-stub.c | 4 +- 29 files changed, 1396 insertions(+), 132 deletions(-) *** These patches are not found in this series, if they are supposed to be I will send them here as well. *** Recap of changes to Xen: libacpi: new DSDT ACPI table for Q35 Makefile: build and use new DSDT table for Q35 hvmloader: add function to query an emulated machine type (i440/Q35) hvmloader: add ACPI enabling for Q35 hvmloader: add Q35 DSDT table loading hvmloader: add basic Q35 support hvmloader: allocate MMCONFIG area in the MMIO hole + minor code refactoring hvmloader: seabios dsdt set to load correct config hvmloader: ovmf dsdt set to load correct config libxl: Q35 support (new option device_model_machine) libxl: Xen Platform device support for Q35 libacpi: build ACPI MCFG table if requested hvmloader: use libacpi to build MCFG table docs: provide description for device_model_machine option Joel Upham (1): Q35 support docs/man/xl.cfg.5.pod.in | 27 ++ tools/firmware/hvmloader/Makefile | 2 +- tools/firmware/hvmloader/config.h | 6 + tools/firmware/hvmloader/hvmloader.c | 13 +- tools/firmware/hvmloader/ovmf.c | 7 +- tools/firmware/hvmloader/pci.c | 285 +++++++++---- tools/firmware/hvmloader/pci_regs.h | 6 + tools/firmware/hvmloader/seabios.c | 5 + tools/firmware/hvmloader/util.c | 130 +++++- tools/firmware/hvmloader/util.h | 10 + tools/libacpi/Makefile | 10 +- tools/libacpi/acpi2_0.h | 21 + tools/libacpi/build.c | 43 ++ tools/libacpi/dsdt_q35.asl | 578 +++++++++++++++++++++++++++ tools/libacpi/libacpi.h | 4 + tools/libs/light/libxl_dm.c | 60 ++- tools/libs/light/libxl_types.idl | 8 + tools/xl/xl_parse.c | 14 + 18 files changed, 1120 insertions(+), 109 deletions(-) create mode 100644 tools/libacpi/dsdt_q35.asl -- 2.34.1
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