mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
drm/i915/execlists: Request the kernel context be pinned high
PIN_HIGH is an expensive operation (in comparison to allocating from the hole stack) unsuitable for frequent use (such as switching between contexts). However, the kernel context should be pinned just once for the lifetime of the driver, and here it is appropriate to keep it out of the mappable range (in order to maximise mappable space for users). Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161218153724.8439-6-chris@chris-wilson.co.uk
This commit is contained in:
parent
70ffe9956c
commit
2947e4080f
@ -767,6 +767,7 @@ static int execlists_context_pin(struct intel_engine_cs *engine,
|
||||
struct i915_gem_context *ctx)
|
||||
{
|
||||
struct intel_context *ce = &ctx->engine[engine->id];
|
||||
unsigned int flags;
|
||||
void *vaddr;
|
||||
int ret;
|
||||
|
||||
@ -781,8 +782,11 @@ static int execlists_context_pin(struct intel_engine_cs *engine,
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = i915_vma_pin(ce->state, 0, GEN8_LR_CONTEXT_ALIGN,
|
||||
PIN_OFFSET_BIAS | GUC_WOPCM_TOP | PIN_GLOBAL);
|
||||
flags = PIN_OFFSET_BIAS | GUC_WOPCM_TOP | PIN_GLOBAL;
|
||||
if (ctx == ctx->i915->kernel_context)
|
||||
flags |= PIN_HIGH;
|
||||
|
||||
ret = i915_vma_pin(ce->state, 0, GEN8_LR_CONTEXT_ALIGN, flags);
|
||||
if (ret)
|
||||
goto err;
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user