• Michael Ellerman's avatar
    powerpc/book3s64: Always build for power4 or later · 3a849815
    Michael Ellerman authored
    When we're not compiling for a specific CPU, ie. none of the
    CONFIG_POWERx_CPU options are set, and CONFIG_GENERIC_CPU *is* set, we
    currently don't pass any -mcpu option to the compiler. This means the
    compiler builds for a "generic" Power CPU.
    
    But back in 2014 we dropped support for pre power4 CPUs in commit
    468a3302 ("powerpc: Drop support for pre-POWER4 cpus").
    
    Given that, there's no point in building the kernel to run on pre power4
    cpus. So update the flags we pass to the compiler when
    CONFIG_GENERIC_CPU is set, to specify -mcpu=power4.
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    3a849815
Makefile 13.9 KB