[PATCH v3 0/4] virtio-iommu: Support VIRTIO_IOMMU_F_BYPASS_CONFIG

[Jean-Philippe Brucker]

Replace the VIRTIO_IOMMU_F_BYPASS feature with
VIRTIO_IOMMU_F_BYPASS_CONFIG, which enables a config space bit to switch
global bypass on and off.

Add a boot-bypass option, which defaults to 'on' to be in line with
other vIOMMUs and to allow running firmware/bootloader that are unaware
of the IOMMU. x86 doesn't need a workaround to boot with virtio-iommu
anymore.

Since v2 [1]:
* Added the new bypass bits to the migration stream.
  As discussed on the v2 thread, we assume that cross-version
  compatibility is not required for live migration at the moment, so we
  only increase the version number. Patch 2 says: "We add the bypass
  field to the migration stream without introducing subsections, based
  on the assumption that this virtio-iommu device isn't being used in
  production enough to require cross-version migration at the moment
  (all previous version required workarounds since they didn't support
  ACPI and boot-bypass)."

[1] 
https://lore.kernel.org/qemu-devel/20220127142940.671333-1-jean-philippe@linaro.org/

Jean-Philippe Brucker (4):
  linux-headers: update to v5.17-rc1
  virtio-iommu: Default to bypass during boot
  virtio-iommu: Support bypass domain
  tests/qtest/virtio-iommu-test: Check bypass config

 include/hw/virtio/virtio-iommu.h              |   1 +
 include/standard-headers/asm-x86/kvm_para.h   |   1 +
 include/standard-headers/drm/drm_fourcc.h     |  11 ++
 include/standard-headers/linux/ethtool.h      |   1 +
 include/standard-headers/linux/fuse.h         |  60 +++++++-
 include/standard-headers/linux/pci_regs.h     | 142 +++++++++---------
 include/standard-headers/linux/virtio_gpio.h  |  72 +++++++++
 include/standard-headers/linux/virtio_i2c.h   |  47 ++++++
 include/standard-headers/linux/virtio_iommu.h |   8 +-
 .../standard-headers/linux/virtio_pcidev.h    |  65 ++++++++
 include/standard-headers/linux/virtio_scmi.h  |  24 +++
 linux-headers/asm-generic/unistd.h            |   5 +-
 linux-headers/asm-mips/unistd_n32.h           |   2 +
 linux-headers/asm-mips/unistd_n64.h           |   2 +
 linux-headers/asm-mips/unistd_o32.h           |   2 +
 linux-headers/asm-powerpc/unistd_32.h         |   2 +
 linux-headers/asm-powerpc/unistd_64.h         |   2 +
 linux-headers/asm-riscv/bitsperlong.h         |  14 ++
 linux-headers/asm-riscv/mman.h                |   1 +
 linux-headers/asm-riscv/unistd.h              |  44 ++++++
 linux-headers/asm-s390/unistd_32.h            |   2 +
 linux-headers/asm-s390/unistd_64.h            |   2 +
 linux-headers/asm-x86/kvm.h                   |  16 +-
 linux-headers/asm-x86/unistd_32.h             |   1 +
 linux-headers/asm-x86/unistd_64.h             |   1 +
 linux-headers/asm-x86/unistd_x32.h            |   1 +
 linux-headers/linux/kvm.h                     |  17 +++
 hw/virtio/virtio-iommu.c                      |  99 ++++++++++--
 tests/qtest/virtio-iommu-test.c               |   2 +
 hw/virtio/trace-events                        |   4 +-
 30 files changed, 561 insertions(+), 90 deletions(-)
 create mode 100644 include/standard-headers/linux/virtio_gpio.h
 create mode 100644 include/standard-headers/linux/virtio_i2c.h
 create mode 100644 include/standard-headers/linux/virtio_pcidev.h
 create mode 100644 include/standard-headers/linux/virtio_scmi.h
 create mode 100644 linux-headers/asm-riscv/bitsperlong.h
 create mode 100644 linux-headers/asm-riscv/mman.h
 create mode 100644 linux-headers/asm-riscv/unistd.h

-- 
2.35.1