linux-kernel - [PATCH 18/31] gpu: nova-core: Hopper/Blackwell: add needs_large_reserved

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Message-ID: <20251203055923.1247681-19-jhubbard@nvidia.com>
Date: Tue,  2 Dec 2025 21:59:10 -0800
From: John Hubbard <jhubbard@...dia.com>
To: Danilo Krummrich <dakr@...nel.org>
Cc: Alexandre Courbot <acourbot@...dia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	Timur Tabi <ttabi@...dia.com>,
	Alistair Popple <apopple@...dia.com>,
	Edwin Peer <epeer@...dia.com>,
	Zhi Wang <zhiw@...dia.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <lossin@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	nouveau@...ts.freedesktop.org,
	rust-for-linux@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	John Hubbard <jhubbard@...dia.com>
Subject: [PATCH 18/31] gpu: nova-core: Hopper/Blackwell: add needs_large_reserved_mem()

Hopper, Blackwell and later need to reserve more memory than previous
GPUs did.

Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 drivers/gpu/nova-core/gpu.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/nova-core/gpu.rs b/drivers/gpu/nova-core/gpu.rs
index 624bbc2a54e8..c0473ef8ac47 100644
--- a/drivers/gpu/nova-core/gpu.rs
+++ b/drivers/gpu/nova-core/gpu.rs
@@ -123,6 +123,11 @@ pub(crate) const fn arch(&self) -> Architecture {
             | Self::GB207 => Architecture::Blackwell,
         }
     }
+
+    #[expect(dead_code)]
+    pub(crate) fn needs_large_reserved_mem(&self) -> bool {
+        matches!(self.arch(), Architecture::Hopper | Architecture::Blackwell)
+    }
 }
 
 // TODO
-- 
2.52.0