• Alexander Graf's avatar
    KVM: PPC: Emulator: clean up SPR reads and writes · 54771e62
    Alexander Graf authored
    When reading and writing SPRs, every SPR emulation piece had to read
    or write the respective GPR the value was read from or stored in itself.
    
    This approach is pretty prone to failure. What if we accidentally
    implement mfspr emulation where we just do "break" and nothing else?
    Suddenly we would get a random value in the return register - which is
    always a bad idea.
    
    So let's consolidate the generic code paths and only give the core
    specific SPR handling code readily made variables to read/write from/to.
    
    Functionally, this patch doesn't change anything, but it increases the
    readability of the code and makes is less prone to bugs.
    Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
    54771e62
emulate.c 11.9 KB