• Sinan Kaya's avatar
    vfio, platform: make reset driver a requirement by default · b5add544
    Sinan Kaya authored
    The code was allowing platform devices to be used without a supporting
    VFIO reset driver. The hardware can be left in some inconsistent state
    after a guest machine abort.
    The reset driver will put the hardware back to safe state and disable
    interrupts before returning the control back to the host machine.
    Adding a new reset_required kernel module option to platform VFIO drivers.
    The default value is true for the DT and ACPI based drivers.
    The reset requirement value for AMBA drivers is set to false and is
    unchangeable to maintain the existing functionality.
    New requirements are:
    1. A reset function needs to be implemented by the corresponding driver
    via DT/ACPI.
    2. The reset function needs to be discovered via DT/ACPI.
    The probe of the driver will fail if any of the above conditions are
    not satisfied.
    Signed-off-by: default avatarSinan Kaya <okaya@codeaurora.org>
    Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
vfio_amba.c 2.67 KB