linux-kernel - [PATCH v5 6/7] drm/etnaviv: Warn when probing on NPUs

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-Id: <20221201103026.53234-7-tomeu.vizoso@collabora.com>
Date:   Thu,  1 Dec 2022 11:30:22 +0100
From:   Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     italonicola@...labora.com,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Russell King <linux+etnaviv@...linux.org.uk>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        etnaviv@...ts.freedesktop.org (moderated list:DRM DRIVERS FOR VIVANTE
        GPU IP),
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS FOR VIVANTE GPU
        IP), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v5 6/7] drm/etnaviv: Warn when probing on NPUs

Userspace is still not making full use of the hardware, so we don't know
yet if changes to the UAPI won't be needed. Warn about it.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 37018bc55810..3cbc82bbf8d4 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -765,6 +765,10 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
 		goto fail;
 	}
 
+	if (gpu->identity.nn_core_count > 0)
+		dev_warn(gpu->dev, "etnaviv has been instantiated on a NPU, "
+                                   "for which the UAPI is still experimental\n");
+
 	/* Exclude VG cores with FE2.0 */
 	if (gpu->identity.features & chipFeatures_PIPE_VG &&
 	    gpu->identity.features & chipFeatures_FE20) {
-- 
2.38.1