From c8f563b633e4a5cb73183a62918de9ea04fcbb07 Mon Sep 17 00:00:00 2001
From: Mark Janes <mark.a.janes@intel.com>
Date: Fri, 28 Aug 2020 13:01:53 -0700
Subject: [PATCH] anv: Allocate buffers with write-combined local memory

Marginally improves DG1 performance (< 1%)

v2: Only on local mem (Lionel)

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18841>
---
 src/intel/vulkan/anv_device.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c
index 9b6dbebbe3e..aa7a5a78ac6 100644
--- a/src/intel/vulkan/anv_device.c
+++ b/src/intel/vulkan/anv_device.c
@@ -3413,7 +3413,9 @@ VkResult anv_CreateDevice(
 
    result = anv_device_alloc_bo(device, "workaround", 4096,
                                 ANV_BO_ALLOC_CAPTURE |
-                                ANV_BO_ALLOC_MAPPED,
+                                ANV_BO_ALLOC_MAPPED |
+                                (device->info->has_local_mem ?
+                                 ANV_BO_ALLOC_WRITE_COMBINE : 0),
                                 0 /* explicit_address */,
                                 &device->workaround_bo);
    if (result != VK_SUCCESS)