• Brian King's avatar
    powerpc/pseries: Fix to handle slb resize across migration · 46db2f86
    Brian King authored
    The SLB can change sizes across a live migration, which was not
    being handled, resulting in possible machine crashes during
    migration if migrating to a machine which has a smaller max SLB
    size than the source machine. Fix this by first reducing the
    SLB size to the minimum possible value, which is 32, prior to
    migration. Then during the device tree update which occurs after
    migration, we make the call to ensure the SLB gets updated. Also
    add the slb_size to the lparcfg output so that the migration
    tools can check to make sure the kernel has this capability
    before allowing migration in scenarios where the SLB size will change.
    
    BenH: Fixed #include <asm/mmu-hash64.h> -> <asm/mmu.h> to avoid
          breaking ppc32 build
    Signed-off-by: default avatarBrian King <brking@linux.vnet.ibm.com>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    46db2f86
mmu-hash64.h 14.2 KB