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Re: [PATCH v3 0/4] virtio-iommu: Support VIRTIO_IOMMU_F_BYPASS_CONFIG
From: |
Jean-Philippe Brucker |
Subject: |
Re: [PATCH v3 0/4] virtio-iommu: Support VIRTIO_IOMMU_F_BYPASS_CONFIG |
Date: |
Thu, 3 Mar 2022 11:41:47 +0000 |
Hello,
On Mon, Feb 14, 2022 at 12:43:52PM +0000, Jean-Philippe Brucker wrote:
> 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.
I just wanted to make sure this doesn't fall through, since it is ready
for v7.0
Thanks,
Jean
>
> 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
>
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