linux-kernel - [PATCH RFC 04/15] drm/vkms: Add a validation function for vkms configuration

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: <20240814-google-remove-crtc-index-from-parameter-v1-4-6e179abf9fd4@bootlin.com>
Date: Wed, 14 Aug 2024 16:36:26 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>, 
 Melissa Wen <melissa.srw@...il.com>, 
 Maíra Canal <mairacanal@...eup.net>, 
 Haneen Mohammed <hamohammed.sa@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net, 
 linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com, 
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com, 
 seanpaul@...gle.com, nicolejadeyee@...gle.com, 
 Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH RFC 04/15] drm/vkms: Add a validation function for vkms
 configuration

As the configuration will be used by userspace, add a validator to avoid
creating a broken DRM device

Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/vkms/vkms_config.c |  5 +++++
 drivers/gpu/drm/vkms/vkms_config.h | 14 ++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
index ad5d814e6e83..d8348af9587e 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -21,6 +21,11 @@ void vkms_config_destroy(struct vkms_config *config)
 	kfree(config);
 }
 
+bool vkms_config_is_valid(struct vkms_config *config)
+{
+	return true;
+}
+
 static int vkms_config_show(struct seq_file *m, void *data)
 {
 	struct drm_debugfs_entry *entry = m->private;
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
index b28483173874..363f5bc8f64b 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -29,4 +29,18 @@ void vkms_config_register_debugfs(struct vkms_device *vkms_device);
 struct vkms_config *vkms_config_create(void);
 void vkms_config_destroy(struct vkms_config *config);
 
+/**
+ * vkms_config_is_valid() - Validate a configuration
+ *
+ * Check if all the property defined in the configuration are valids. This will return false for
+ * example if:
+ * - no or many primary planes are present;
+ * - the default rotation of a plane is not in its supported rotation;
+ * - a CRTC don't have any encoder...
+ *
+ * @vkms_config: Configuration to validate
+ */
+bool vkms_config_is_valid(struct vkms_config *vkms_config);
+
+
 #endif //_VKMS_CONFIG_H

-- 
2.44.2