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  1. RHEL
  2. RHEL-7112

[seabios] dynamic mmio window

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    • seabios-1.16.3-1.el9
    • rhel-sst-virtualization
    • ssg_virtualization
    • 21
    • None
    • False
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    • Enhancement
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      .SeaBIOS now scales MMIO address space with total available address space

      With this update, SeaBIOS reserves address space for memory-mapped I/O (MMIO) proportionately with the total available physical address space. As a result, virtual devices that require a significant amount of address space for their resources, such as certain GPUs and NPUs, now use host resources more effectively on SeaBIOS.
      Show
      .SeaBIOS now scales MMIO address space with total available address space With this update, SeaBIOS reserves address space for memory-mapped I/O (MMIO) proportionately with the total available physical address space. As a result, virtual devices that require a significant amount of address space for their resources, such as certain GPUs and NPUs, now use host resources more effectively on SeaBIOS.
    • Proposed
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      Description of problem:
      bring seabios behavior in sync with edk2

      • detect available physical address space
      • use larger mmio window and pcie root port windows if possible.

        1. seabios-avocado-vt-vm1-phys-bit52.log
          20 kB
        2. win10_i386_boot_with_lm-off_pae-on_with_memory_60G_pass.log
          12 kB
        3. win10_i386_cannot_find_driver.png
          win10_i386_cannot_find_driver.png
          18 kB
        4. win10_i386_installation_qemu_cmd.sh
          5 kB
        5. win10_i386_installation_with_lm-off_pae-on_with_memory_16G_pass.log
          38 kB
        6. win10_i386_installation_with_lm-off_pae-on_with_memory_30G_pass.log
          62 kB
        7. win10_i386_installation_with_lm-off_pae-on_with_memory_32G_fail.log
          25 kB
        8. win10_i386_installation_with_lm-off_pae-on_with_memory_4G_pass.log
          62 kB
        9. win10_i386_installation_with_lm-off_pae-on_with_memory_64G_fail.log
          12 kB

              rhn-engineering-ghoffman Gerd Hoffmann
              rhn-engineering-ghoffman Gerd Hoffmann
              Gerd Hoffmann Gerd Hoffmann
              Xueqiang Wei Xueqiang Wei
              Jiří Herrmann Jiří Herrmann
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                Created:
                Updated:
                Resolved: