• Jeremy Fitzhardinge's avatar
    xen: deal with virtually mapped percpu data · 9976b39b
    Jeremy Fitzhardinge authored
    The virtually mapped percpu space causes us two problems:
    
     - for hypercalls which take an mfn, we need to do a full pagetable
       walk to convert the percpu va into an mfn, and
    
     - when a hypercall requires a page to be mapped RO via all its aliases,
       we need to make sure its RO in both the percpu mapping and in the
       linear mapping
    
    This primarily affects the gdt and the vcpu info structure.
    Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
    Cc: Xen-devel <xen-devel@lists.xensource.com>
    Cc: Gerd Hoffmann <kraxel@redhat.com>
    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Cc: Tejun Heo <htejun@gmail.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    9976b39b
mmu.c 47.8 KB