Add arm64 support for drm_clflush_virt_range. dcache_clean_inval_poc performs a flush by first performing a clean, follow by an invalidation operation. v2 (Michael Cheng): Use correct macro for cleaning and invalidation the dcache. Thanks Tvrtko for the suggestion. v3 (Michael Cheng): Replace asm/cacheflush.h with linux/cacheflush.h Signed-off-by: Michael Cheng <michael.cheng@xxxxxxxxx> Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx> --- drivers/gpu/drm/drm_cache.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index c3e6e615bf09..f7b17e0d57f0 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -28,6 +28,7 @@ * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com> */ +#include <linux/cacheflush.h> #include <linux/cc_platform.h> #include <linux/export.h> #include <linux/highmem.h> @@ -174,6 +175,11 @@ drm_clflush_virt_range(void *addr, unsigned long length) if (wbinvd_on_all_cpus()) pr_err("Timed out waiting for cache flush\n"); + +#elif defined(CONFIG_ARM64) + void *end = addr + length; + dcache_clean_inval_poc((unsigned long)addr, (unsigned long)end); + #else WARN_ONCE(1, "Architecture has no drm_cache.c support\n"); #endif -- 2.25.1