• Christoffer Dall's avatar
    KVM: arm/arm64: Support uaccess of GICC_APRn · 9b87e7a8
    Christoffer Dall authored
    When migrating guests around we need to know the active priorities to
    ensure functional virtual interrupt prioritization by the GIC.
    
    This commit clarifies the API and how active priorities of interrupts in
    different groups are represented, and implements the accessor functions
    for the uaccess register range.
    
    We live with a slight layering violation in accessing GICv3 data
    structures from vgic-mmio-v2.c, because anything else just adds too much
    complexity for us to deal with (it's not like there's a benefit
    elsewhere in the code of an intermediate representation as is the case
    with the VMCR).  We accept this, because while doing v3 processing from
    a file named something-v2.c can look strange at first, this really is
    specific to dealing with the user space interface for something that
    looks like a GICv2.
    Reviewed-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
    Signed-off-by: default avatarChristoffer Dall <cdall@linaro.org>
    9b87e7a8
arm-vgic.txt 5.38 KB