• Khalid Aziz's avatar
    sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE · 494e5b6f
    Khalid Aziz authored
    sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE
    
    Bit 9 of TTE is CV (Cacheable in V-cache) on sparc v9 processor while
    the same bit 9 is MCDE (Memory Corruption Detection Enable) on M7
    processor. This creates a conflicting usage of the same bit. Kernel
    sets TTE.cv bit on all pages for sun4v architecture which works well
    for sparc v9 but enables memory corruption detection on M7 processor
    which is not the intent. This patch adds code to determine if kernel
    is running on M7 processor and takes steps to not enable memory
    corruption detection in TTE erroneously.
    Signed-off-by: default avatarKhalid Aziz <khalid.aziz@oracle.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    494e5b6f
trap_block.h 6.34 KB