Re: [PATCH v6 00/10] Introduce the microvm machine type

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Oct 04, 2019 at 11:37:42AM +0200, Sergio Lopez wrote:
> Microvm is a machine type inspired by Firecracker and constructed
> after the its machine model.
> 
> It's a minimalist machine type without PCI nor ACPI support, designed
> for short-lived guests. Microvm also establishes a baseline for
> benchmarking and optimizing both QEMU and guest operating systems,
> since it is optimized for both boot time and footprint.
> 
> ---
> 
> Changelog
> v6:
>  - Some style fixes (Philippe Mathieu-Daudé)
>  - Fix a documentation bug stating that LAPIC was in userspace (Paolo
>    Bonzini)
>  - Update Xen HVM code after X86MachineState introduction (Philippe
>    Mathieu-Daudé)
>  - Rename header guard from QEMU_VIRTIO_MMIO_H to HW_VIRTIO_MMIO_H
>    (Philippe Mathieu-Daudé)
> 
> v5:
>  - Drop unneeded "[PATCH v4 2/8] hw/i386: Factorize e820 related
>    functions" (Philippe Mathieu-Daudé)
>  - Drop unneeded "[PATCH v4 1/8] hw/i386: Factorize PVH related
>    functions" (Stefano Garzarella)
>  - Split X86MachineState introduction into smaller patches (Philippe
>    Mathieu-Daudé)
>  - Change option-roms to x-option-roms and kernel-cmdline to
>    auto-kernel-cmdline (Paolo Bonzini)
>  - Make i8259 PIT and i8254 PIC optional (Paolo Bonzini)
>  - Some fixes to the documentation (Paolo Bonzini)
>  - Switch documentation format from txt to rst (Peter Maydell)
>  - Move NMI interface to X86_MACHINE (Philippe Mathieu-Daudé, Paolo
>    Bonzini)
> 
> v4:
>  - This is a complete rewrite of the whole patchset, with a focus on
>    reusing as much existing code as possible to ease the maintenance burden
>    and making the machine type as compatible as possible by default. As
>    a result, the number of lines dedicated specifically to microvm is
>    383 (code lines measured by "cloc") and, with the default
>    configuration, it's now able to boot both PVH ELF images and
>    bzImages with either SeaBIOS or qboot.
> 
> v3:
>   - Add initrd support (thanks Stefano).
> 
> v2:
>   - Drop "[PATCH 1/4] hw/i386: Factorize CPU routine".
>   - Simplify machine definition (thanks Eduardo).
>   - Remove use of unneeded NUMA-related callbacks (thanks Eduardo).
>   - Add a patch to factorize PVH-related functions.
>   - Replace use of Linux's Zero Page with PVH (thanks Maran and Paolo).
> 
> ---
> Sergio Lopez (10):
>   hw/virtio: Factorize virtio-mmio headers
>   hw/i386/pc: rename functions shared with non-PC machines
>   hw/i386/pc: move shared x86 functions to x86.c and export them
>   hw/i386: split PCMachineState deriving X86MachineState from it
>   hw/i386: make x86.c independent from PCMachineState
>   fw_cfg: add "modify" functions for all types
>   hw/intc/apic: reject pic ints if isa_pic == NULL
>   roms: add microvm-bios (qboot) as binary and git submodule
>   docs/microvm.rst: document the new microvm machine type
>   hw/i386: Introduce the microvm machine type
> 
>  docs/microvm.rst                 |  98 ++++
>  default-configs/i386-softmmu.mak |   1 +
>  include/hw/i386/microvm.h        |  83 ++++
>  include/hw/i386/pc.h             |  28 +-
>  include/hw/i386/x86.h            |  94 ++++
>  include/hw/nvram/fw_cfg.h        |  42 ++
>  include/hw/virtio/virtio-mmio.h  |  73 +++
>  hw/acpi/cpu_hotplug.c            |  10 +-
>  hw/i386/acpi-build.c             |  29 +-
>  hw/i386/amd_iommu.c              |   3 +-
>  hw/i386/intel_iommu.c            |   3 +-
>  hw/i386/microvm.c                | 574 ++++++++++++++++++++++
>  hw/i386/pc.c                     | 780 +++---------------------------
>  hw/i386/pc_piix.c                |  46 +-
>  hw/i386/pc_q35.c                 |  38 +-
>  hw/i386/pc_sysfw.c               |  58 +--
>  hw/i386/x86.c                    | 790 +++++++++++++++++++++++++++++++
>  hw/i386/xen/xen-hvm.c            |  23 +-
>  hw/intc/apic.c                   |   2 +-
>  hw/intc/ioapic.c                 |   2 +-
>  hw/nvram/fw_cfg.c                |  29 ++
>  hw/virtio/virtio-mmio.c          |  48 +-
>  .gitmodules                      |   3 +
>  hw/i386/Kconfig                  |   4 +
>  hw/i386/Makefile.objs            |   2 +
>  pc-bios/bios-microvm.bin         | Bin 0 -> 65536 bytes
>  roms/Makefile                    |   6 +
>  roms/qboot                       |   1 +

So I guess we want to add new files for x86 machines MAINTAINERS entry.

Otherwise looks good.
Which tree is this going to be merged through? Mine?


>  28 files changed, 1963 insertions(+), 907 deletions(-)
>  create mode 100644 docs/microvm.rst
>  create mode 100644 include/hw/i386/microvm.h
>  create mode 100644 include/hw/i386/x86.h
>  create mode 100644 include/hw/virtio/virtio-mmio.h
>  create mode 100644 hw/i386/microvm.c
>  create mode 100644 hw/i386/x86.c
>  create mode 100755 pc-bios/bios-microvm.bin
>  create mode 160000 roms/qboot
> 
> -- 
> 2.21.0