On Fri, Aug 14, 2015 at 05:18:27PM +0100, Chris Wilson wrote:
On Fri, Aug 14, 2015 at 06:43:30PM +0300, Imre Deak wrote:
Due to a coherency issue on BXT A steppings we can't guarantee a
coherent view of cached (CPU snooped) GPU mappings, so fail such
requests. User space is supposed to fall
Due to a coherency issue on BXT A steppings we can't guarantee a
coherent view of cached (CPU snooped) GPU mappings, so fail such
requests. User space is supposed to fall back to uncached mappings in
this case.
v2:
- limit the WA to A steppings, on later stepping this HW issue is fixed
v3:
-
On Fri, Aug 14, 2015 at 06:43:30PM +0300, Imre Deak wrote:
Due to a coherency issue on BXT A steppings we can't guarantee a
coherent view of cached (CPU snooped) GPU mappings, so fail such
requests. User space is supposed to fall back to uncached mappings in
this case.
v2:
- limit the WA
