linux-kernel - [PATCH v3 2/2] drm/nouveau: use DMA TT population method on ARM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1403868134-31741-3-git-send-email-acourbot@nvidia.com>
Date:	Fri, 27 Jun 2014 20:22:14 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Ben Skeggs <bskeggs@...hat.com>, David Airlie <airlied@...ux.ie>,
	Lucas Stach <dev@...xeye.de>,
	Thierry Reding <thierry.reding@...il.com>
CC:	<nouveau@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
	<linux-tegra@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <gnurou@...il.com>,
	Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH v3 2/2] drm/nouveau: use DMA TT population method on ARM

Cached memory accesses between the CPU and the GPU are not coherent on
ARM. Use the DMA TTM allocator on this architecture to obtain coherent
memory.

Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
 drivers/gpu/drm/nouveau/nouveau_ttm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index 70893416d4b6..d77fc8a5167d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
@@ -385,6 +385,8 @@ nouveau_ttm_init(struct nouveau_drm *drm)
 	if (swiotlb_nr_tbl())
 		drm->ttm.populate_method = DMA;
 #endif
+	if (IS_ENABLED(CONFIG_ARM))
+		drm->ttm.populate_method = DMA;
 #if defined(TTM_HAS_AGP)
 	if (drm->agp.stat == ENABLED)
 		drm->ttm.populate_method = AGP;
-- 
2.0.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/