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| author | Dan Williams <dan.j.williams@intel.com> | 2019-11-07 04:43:43 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-11-07 17:45:00 +0300 |
| commit | a6c7f4c6aea5f4ca6056b06cec7ebd79f8c23e33 (patch) | |
| tree | c942e9a1b25e2cf4b47a233ef22e4badebcd86c7 /LICENSES/preferred | |
| parent | 460370ab20b6cc174256e46e192adf01e730faf6 (diff) | |
| download | linux-a6c7f4c6aea5f4ca6056b06cec7ebd79f8c23e33.tar.xz | |
device-dax: Add a driver for "hmem" devices
Platform firmware like EFI/ACPI may publish "hmem" platform devices.
Such a device is a performance differentiated memory range likely
reserved for an application specific use case. The driver gives access
to 100% of the capacity via a device-dax mmap instance by default.
However, if over-subscription and other kernel memory management is
desired the resulting dax device can be assigned to the core-mm via the
kmem driver.
This consumes "hmem" devices the producer of "hmem" devices is saved for
a follow-on patch so that it can reference the new CONFIG_DEV_DAX_HMEM
symbol to gate performing the enumeration work.
Reported-by: kbuild test robot <lkp@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'LICENSES/preferred')
0 files changed, 0 insertions, 0 deletions