• Mihai Caraman's avatar
    KVM: PPC: Allow kvmppc_get_last_inst() to fail · 51f04726
    Mihai Caraman authored
    On book3e, guest last instruction is read on the exit path using load
    external pid (lwepx) dedicated instruction. This load operation may fail
    due to TLB eviction and execute-but-not-read entries.
    
    This patch lay down the path for an alternative solution to read the guest
    last instruction, by allowing kvmppc_get_lat_inst() function to fail.
    Architecture specific implmentations of kvmppc_load_last_inst() may read
    last guest instruction and instruct the emulation layer to re-execute the
    guest in case of failure.
    
    Make kvmppc_get_last_inst() definition common between architectures.
    Signed-off-by: default avatarMihai Caraman <mihai.caraman@freescale.com>
    Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
    51f04726
book3s_paired_singles.c 30.9 KB