• Toshi Kani's avatar
    EDAC, ghes: Add platform check · 5deed6b6
    Toshi Kani authored
    The ghes_edac driver was introduced in 2013 [1], but it has not been
    enabled by any distro yet. This driver obtains error info from firmware
    interfaces (APEI), which are not properly implemented on many platforms,
    as the driver says on load:
    
      This EDAC driver relies on BIOS to enumerate memory and get error
      reports. Unfortunately, not all BIOSes reflect the memory layout
      correctly. So, the end result of using this driver varies from vendor
      to vendor. If you find incorrect reports, please contact your hardware
      vendor to correct its BIOS.
    
    To get out from this situation, add a platform check to selectively
    enable the driver on platforms that are known to have proper APEI
    firmware implementation.
    
    "ghes_edac.force_load=1" skips this platform check.
    
    [1]: https://lkml.kernel.org/r/cover.1360931635.git.mchehab@redhat.comSigned-off-by: default avatarToshi Kani <toshi.kani@hpe.com>
    Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
    Cc: Tony Luck <tony.luck@intel.com>
    Cc: linux-acpi@vger.kernel.org
    Cc: linux-edac <linux-edac@vger.kernel.org>
    Link: http://lkml.kernel.org/r/20170823225447.15608-4-toshi.kani@hpe.comSigned-off-by: default avatarBorislav Petkov <bp@suse.de>
    5deed6b6
ghes_edac.c 13.4 KB