From edb5ff07ef67962b81ea7abb716a74ef0a491ca1 Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@pengutronix.de>
Date: Fri, 2 Aug 2019 14:24:06 +0200
Subject: drm/etnaviv: skip command stream validation on PPAS capable GPUs
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Git-commit: edb5ff07ef67962b81ea7abb716a74ef0a491ca1
Patch-mainline: v5.4-rc1
References: bsc#1152489
With per-process address spaces in place, a rogue process submitting
bogus command streams can only hurt itself. There is no need to
validate the command stream before execution anymore.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
index 16e7d371a7ef..63a1206492d2 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -517,7 +517,8 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
if (ret)
goto err_submit_objects;
- if (!etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
+ if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) &&
+ !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
relocs, args->nr_relocs)) {
ret = -EINVAL;
goto err_submit_objects;
--
2.28.0