• Marc Zyngier's avatar
    arm64: KVM: allows discrimination of AArch32 sysreg access · 2072d29c
    Marc Zyngier authored
    The current handling of AArch32 trapping is slightly less than
    perfect, as it is not possible (from a handler point of view)
    to distinguish it from an AArch64 access, nor to tell a 32bit
    from a 64bit access either.
    
    Fix this by introducing two additional flags:
    - is_aarch32: true if the access was made in AArch32 mode
    - is_32bit: true if is_aarch32 == true and a MCR/MRC instruction
      was used to perform the access (as opposed to MCRR/MRRC).
    
    This allows a handler to cover all the possible conditions in which
    a system register gets trapped.
    Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
    Acked-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
    2072d29c
sys_regs.h 3.53 KB