• Jan Beulich's avatar
    xen/acpi: allow xen-acpi-processor driver to load on Xen 4.7 · 6f2d9d99
    Jan Beulich authored
    As of Xen 4.7 PV CPUID doesn't expose either of CPUID[1].ECX[7] and
    CPUID[0x80000007].EDX[7] anymore, causing the driver to fail to load on
    both Intel and AMD systems. Doing any kind of hardware capability
    checks in the driver as a prerequisite was wrong anyway: With the
    hypervisor being in charge, all such checking should be done by it. If
    ACPI data gets uploaded despite some missing capability, the hypervisor
    is free to ignore part or all of that data.
    
    Ditch the entire check_prereq() function, and do the only valid check
    (xen_initial_domain()) in the caller in its place.
    Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
    6f2d9d99
xen-acpi-processor.c 16.1 KB