• Paul Mackerras's avatar
    [POWERPC] Fix boot failure on POWER6 · dfbe0d3b
    Paul Mackerras authored
    Commit 473980a9 added a call to clear
    the SLB shadow buffer before registering it.  Unfortunately this means
    that we clear out the entries that slb_initialize has previously set in
    there.  On POWER6, the hypervisor uses the SLB shadow buffer when doing
    partition switches, and that means that after the next partition switch,
    each non-boot CPU has no SLB entries to map the kernel text and data,
    which causes it to crash.
    
    This fixes it by reverting most of 473980a9 and instead clearing the
    3rd entry explicitly in slb_initialize.  This fixes the problem that
    473980a9 was trying to solve, but without breaking POWER6.
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
    dfbe0d3b
mmu-hash64.h 14.7 KB