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  • Alex Bennée's avatar
    KVM: arm64: introduce vcpu->arch.debug_ptr · 84e690bf
    Alex Bennée authored
    
    
    This introduces a level of indirection for the debug registers. Instead
    of using the sys_regs[] directly we store registers in a structure in
    the vcpu. The new kvm_arm_reset_debug_ptr() sets the debug ptr to the
    guest context.
    
    Because we no longer give the sys_regs offset for the sys_reg_desc->reg
    field, but instead the index into a debug-specific struct we need to
    add a number of additional trap functions for each register. Also as the
    generic generic user-space access code no longer works we have
    introduced a new pair of function pointers to the sys_reg_desc structure
    to override the generic code when needed.
    
    Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
    Signed-off-by: default avatarAlex Bennée <alex.bennee@linaro.org>
    Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
    84e690bf