• Jesse Barnes's avatar
    x86/Sandy Bridge: reserve pages when integrated graphics is present · a9acc536
    Jesse Barnes authored
    SNB graphics devices have a bug that prevent them from accessing certain
    memory ranges, namely anything below 1M and in the pages listed in the
    table.  So reserve those at boot if set detect a SNB gfx device on the
    CPU to avoid GPU hangs.
    
    Stephane Marchesin had a similar patch to the page allocator awhile
    back, but rather than reserving pages up front, it leaked them at
    allocation time.
    
    [ hpa: made a number of stylistic changes, marked arrays as static
      const, and made less verbose; use "memblock=debug" for full
      verbosity. ]
    Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
    Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
    a9acc536
setup.c 27.8 KB