Re: [PATCH] gpu: nova-core: reserve a larger GSP WPR2 heap when vGPU is enabled

[Zhi Wang <zhiw@nvidia.com>]

On Tue, 16 Jun 2026 23:20:41 +0900
"Alexandre Courbot" <acourbot@nvidia.com> wrote:

> On Thu Jun 4, 2026 at 8:43 PM JST, Zhi Wang wrote:

snip

> 
> `total_vfs` is only meaningful if `vgpu_requested` is true. So these
> two parameters would be better modeled using an `Option`, or maybe
> even better a dedicated parameter type for vGPU settings? Something
> like (please pick a better name if any):
> 
>     enum VgpuRequest {
>         Disabled,
>         Requested {
>             total_vfs: u16,
>         }
>     }
> 

Make sense. Let me try. 

> > +    ) -> Result<Self> {

snip

> > diff --git a/drivers/gpu/nova-core/gsp/fw.rs
> > b/drivers/gpu/nova-core/gsp/fw.rs index 14424a2c2d83..2f3cbc5d5114
> > 100644 --- a/drivers/gpu/nova-core/gsp/fw.rs
> > +++ b/drivers/gpu/nova-core/gsp/fw.rs
> > @@ -101,6 +101,18 @@ pub(in crate::gsp) fn
> > advance_cpu_write_ptr(qs: &Coherent<GspMem>, count: u32) {
> > pub(crate) const GSP_MSG_QUEUE_ELEMENT_SIZE_MAX: usize =
> > num::u32_as_usize(bindings::GSP_MSG_QUEUE_ELEMENT_SIZE_MAX); 
> > +const GSP_FW_HEAP_SIZE_VGPU_1VM: u64 = 174 * u64::SZ_1M;
> > +const GSP_FW_HEAP_SIZE_VGPU_DEFAULT: u64 = 581 * u64::SZ_1M;
> > +const GSP_FW_HEAP_SIZE_VGPU_48VMS: u64 = 1370 * u64::SZ_1M;  
> 
> Do we have a source of truth for these values? I can see definitions
> for `GSP_FW_HEAP_SIZE_VGPU_DEFAULT` and `GSP_FW_HEAP_SIZE_VGPU_48VMS`
> in OpenRM (meaning we could generate bindings for them), but cannot
> find a reference for `GSP_FW_HEAP_SIZE_VGPU_1VM`...

I see. Let me remove this one and we can add this when OpenRM has it.

Z.