linux-kernel - [PATCH RFC 14/18] rust: drm: gem: Add set

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: <20230307-rust-drm-v1-14-917ff5bc80a8@asahilina.net>
Date:   Tue, 07 Mar 2023 23:25:39 +0900
From:   Asahi Lina <lina@...hilina.net>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        Luben Tuikov <luben.tuikov@....com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>
Cc:     Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Karol Herbst <kherbst@...hat.com>,
        Ella Stanforth <ella@...unix.org>,
        Faith Ekstrand <faith.ekstrand@...labora.com>,
        Mary <mary@...y.zone>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, rust-for-linux@...r.kernel.org,
        linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org,
        linux-sgx@...r.kernel.org, asahi@...ts.linux.dev,
        Asahi Lina <lina@...hilina.net>
Subject: [PATCH RFC 14/18] rust: drm: gem: Add set_exportable() method

This allows drivers to control whether a given GEM object is allowed to
be exported via PRIME to other drivers.
---
 rust/kernel/drm/gem/mod.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs
index e66bdef35c2e..196252a25b5a 100644
--- a/rust/kernel/drm/gem/mod.rs
+++ b/rust/kernel/drm/gem/mod.rs
@@ -135,6 +135,13 @@ pub trait BaseObject: IntoGEMObject {
         self.gem_ref().size
     }
 
+    /// Sets the exportable flag, which controls whether the object can be exported via PRIME.
+    fn set_exportable(&mut self, exportable: bool) {
+        // SAFETY: gem_obj() is valid per the type invariant, and this is safe to write if we
+        // are the only holder (mutable ref).
+        unsafe { (*self.gem_obj()).exportable = exportable };
+    }
+
     /// Creates a new reference to the object.
     fn reference(&self) -> ObjectRef<Self> {
         // SAFETY: Having a reference to an Object implies holding a GEM reference

-- 
2.35.1