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    Subject[PATCH v4 23/26] RFC: KVM: powerpc: Move processor compatibility check to hardware setup
    Date
    From: Isaku Yamahata <isaku.yamahata@intel.com>

    Move processor compatibility check from kvm_arch_processor_compat() into
    kvm_arch_hardware_setup(). The check does model name comparison with a
    global variable, cur_cpu_spec. There is no point to check it at run time
    on all processors.

    Suggested-by: Sean Christopherson <seanjc@google.com>
    Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
    Cc: linuxppc-dev@lists.ozlabs.org
    Cc: Fabiano Rosas <farosas@linux.ibm.com>
    ---
    arch/powerpc/kvm/powerpc.c | 13 +++++++++++--
    1 file changed, 11 insertions(+), 2 deletions(-)

    diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
    index 7b56d6ccfdfb..7e3a6659f107 100644
    --- a/arch/powerpc/kvm/powerpc.c
    +++ b/arch/powerpc/kvm/powerpc.c
    @@ -444,12 +444,21 @@ int kvm_arch_hardware_enable(void)

    int kvm_arch_hardware_setup(void *opaque)
    {
    - return 0;
    + /*
    + * kvmppc_core_check_processor_compat() checks the global variable.
    + * No point to check on all processors or at runtime.
    + * arch/powerpc/kvm/book3s.c: return 0
    + * arch/powerpc/kvm/e500.c: strcmp(cur_cpu_spec->cpu_name, "e500v2")
    + * arch/powerpc/kvm/e500mc.c: strcmp(cur_cpu_spec->cpu_name, "e500mc")
    + * strcmp(cur_cpu_spec->cpu_name, "e5500")
    + * strcmp(cur_cpu_spec->cpu_name, "e6500")
    + */
    + return kvmppc_core_check_processor_compat();
    }

    int kvm_arch_check_processor_compat(void)
    {
    - return kvmppc_core_check_processor_compat();
    + return 0;
    }

    int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
    --
    2.25.1
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