[PATCH v10 07/28] gpu: nova-core: Hopper/Blackwell: skip GFW boot waiting

John Hubbard
2026-04-11T02:50:17Z

Hopper and Blackwell GPUs use FSP-based secure boot and do not
require waiting for GFW_BOOT completion. Add a Gh100 GPU HAL that
returns Ok(()) for wait_gfw_boot_completion(), and route Hopper
and Blackwell architectures to it.

Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
drivers/gpu/nova-core/gpu/hal.rs | 11 +++++------
drivers/gpu/nova-core/gpu/hal/gh100.rs | 18 ++++++++++++++++++
2 files changed, 23 insertions(+), 6 deletions(-)
create mode 100644 drivers/gpu/nova-core/gpu/hal/gh100.rs

diff --git a/drivers/gpu/nova-core/gpu/hal.rs b/drivers/gpu/nova-core/gpu/hal.rs
index a261c6af92be..788de20ab5d3 100644
--- a/drivers/gpu/nova-core/gpu/hal.rs
+++ b/drivers/gpu/nova-core/gpu/hal.rs
@@ -10,6 +10,7 @@
},
};

+mod gh100;
mod tu102;

pub(crate) trait GpuHal {
@@ -19,11 +20,9 @@ pub(crate) trait GpuHal {

pub(super) fn gpu_hal(chipset: Chipset) -> &'static dyn GpuHal {
match chipset.arch() {
- Architecture::Turing
- | Architecture::Ampere
- | Architecture::Ada
- | Architecture::Hopper
- | Architecture::BlackwellGB10x
- | Architecture::BlackwellGB20x => tu102::TU102_HAL,
+ Architecture::Turing | Architecture::Ampere | Architecture::Ada => tu102::TU102_HAL,
+ Architecture::Hopper | Architecture::BlackwellGB10x | Architecture::BlackwellGB20x => {
+ gh100::GH100_HAL
+ }
}
}
diff --git a/drivers/gpu/nova-core/gpu/hal/gh100.rs b/drivers/gpu/nova-core/gpu/hal/gh100.rs
new file mode 100644
index 000000000000..1ed5bccdda1d
--- /dev/null
+++ b/drivers/gpu/nova-core/gpu/hal/gh100.rs
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use kernel::prelude::*;
+
+use crate::driver::Bar0;
+
+use super::GpuHal;
+
+struct Gh100;
+
+impl GpuHal for Gh100 {
+ fn wait_gfw_boot_completion(&self, _bar: &Bar0) -> Result {
+ Ok(())
+ }
+}
+
+const GH100: Gh100 = Gh100;
+pub(super) const GH100_HAL: &dyn GpuHal = &GH100;
--
2.53.0