On Sun, May 3, 2020 at 2:31 PM Chris Wilson chris@chris-wilson.co.uk wrote:
Query whether or not we are in a legal context for using SIMD, before using SSE4.2 registers.
Suggested-by: Jason A. Donenfeld Jason@zx2c4.com Signed-off-by: Chris Wilson chris@chris-wilson.co.uk
drivers/gpu/drm/i915/i915_memcpy.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_memcpy.c b/drivers/gpu/drm/i915/i915_memcpy.c index 7b3b83bd5ab8..fc18d6c28d5f 100644 --- a/drivers/gpu/drm/i915/i915_memcpy.c +++ b/drivers/gpu/drm/i915/i915_memcpy.c @@ -24,6 +24,7 @@
#include <linux/kernel.h> #include <asm/fpu/api.h> +#include <asm/simd.h>
#include "i915_memcpy.h"
@@ -115,6 +116,9 @@ bool i915_memcpy_from_wc(void *dst, const void *src, unsigned long len) if (unlikely(((unsigned long)dst | (unsigned long)src | len) & 15)) return false;
if (unlikely(!may_use_simd()))return false;if (static_branch_likely(&has_movntdqa)) { if (likely(len)) __memcpy_ntdqa(dst, src, len >> 4);-- 2.20.1
Looks like you beat me to the punch. Thanks for doing this.
Reviewed-by: Jason A. Donenfeld Jason@zx2c4.com