• Paul Mackerras's avatar
    KVM: PPC: Book3S HV: Implement dirty page logging for radix guests · 8f7b79b8
    Paul Mackerras authored
    This adds code to keep track of dirty pages when requested (that is,
    when memslot->dirty_bitmap is non-NULL) for radix guests.  We use the
    dirty bits in the PTEs in the second-level (partition-scoped) page
    tables, together with a bitmap of pages that were dirty when their
    PTE was invalidated (e.g., when the page was paged out).  This bitmap
    is stored in the first half of the memslot->dirty_bitmap area, and
    kvm_vm_ioctl_get_dirty_log_hv() now uses the second half for the
    bitmap that gets returned to userspace.
    Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    8f7b79b8
book3s_64_mmu_hv.c 43.8 KB