On Thu, May 11, 2017 at 06:07:42PM +0800, Chuanxiao Dong wrote: > initialised is fixup by the GVT shadow context as true to avoid the init > from the host because it cannot take the settings from the host. Add a > check to let host driver only overwrite it when the init callback is NULL During execlist_context_deferred_alloc() we presumed that the context is uninitialised (we only just allocated the state object for it!) and chose to optimise away the later call to engine->init_context() if engine->init_context were NULL. This breaks with GVT's contexts that are marked as pre-initialised to avoid us annoyingly calling engine->init_context(). The fix is to not override ce->initialised if it is already true. > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx> > --- > drivers/gpu/drm/i915/intel_lrc.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c > index 319d9a8..d0e9b61 100644 > --- a/drivers/gpu/drm/i915/intel_lrc.c > +++ b/drivers/gpu/drm/i915/intel_lrc.c > @@ -1956,7 +1956,8 @@ static int execlists_context_deferred_alloc(struct i915_gem_context *ctx, > > ce->ring = ring; > ce->state = vma; > - ce->initialised = engine->init_context == NULL; > + if (!engine->init_context) > + ce->initialised = true; Does the compiler generate a cmov? -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
