• Paul Mackerras's avatar
    KVM: PPC: Book3S HV: Fix software walk of guest process page tables · 70cd4c10
    Paul Mackerras authored
    This fixes some bugs in the code that walks the guest's page tables.
    These bugs cause MMIO emulation to fail whenever the guest is in
    virtial mode (MMU on), leading to the guest hanging if it tried to
    access a virtio device.
    
    The first bug was that when reading the guest's process table, we were
    using the whole of arch->process_table, not just the field that contains
    the process table base address.  The second bug was that the mask used
    when reading the process table entry to get the radix tree base address,
    RPDB_MASK, had the wrong value.
    
    Fixes: 9e04ba69 ("KVM: PPC: Book3S HV: Add basic infrastructure for radix guests")
    Fixes: e9983344 ("powerpc/mm/radix: Add partition table format & callback")
    Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
    70cd4c10
mmu.h 4.52 KB