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46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: oSdS7Tyn/3dI6biI9sJASNcu2RcjtkHa+VuiuLmg2qFZKY3TwnhLAvI+5AeYHaoXJ3KVoTBfR0sC2EJNE9vTZA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR11MB7799 X-OriginatorOrg: intel.com X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On Thu, Feb 06, 2025 at 10:45:45PM +0100, Michal Wajdeczko wrote: > We should now have sufficient changes in the driver to run it on > PTL platforms in the SR-IOV Physical Function (PF) mode, that would > allow us to enable SR-IOV Virtual Functions (VFs), and successfully > probe our driver in the VF mode on enabled VF devices. > > To unblock SR-IOV PF mode you need to load xe with modparam: > > xe.max_vfs=7 > > Then to enable VFs it is sufficient to use: > > $ echo 7 > /sys/bus/pci/devices/0000:00:02.0/sriov_numvfs > > Note that in default auto-provisioning all VFs are allocated with > some amount of shared resources (like unlimited GPU execution and > preemption times, fair GGTT space, fair GuC context IDs range, ...) > > However with CONFIG_DEBUG_FS enabled it is possible to tweak most > of the SR-IOV configuration parameters using attributes like: > > /sys/kernel/debug/dri/0000:00:02.0/gt0/ > ├── pf > │   ├── contexts_spare > │   ├── doorbells_spare > │   ├── exec_quantum_ms > │   ├── ggtt_spare > │   ├── preempt_timeout_us > │   ├── sched_priority > │   └── ... > ├── vf1 > │   ├── contexts_quota > │   ├── doorbells_quota > │   ├── exec_quantum_ms > │   ├── ggtt_quota > │   ├── preempt_timeout_us > │   ├── sched_priority > │   └── ... > ├── vf2 > │   └── ... > : > > Signed-off-by: Michal Wajdeczko > Cc: Rodrigo Vivi > Cc: Lucas De Marchi > Cc: Thomas Hellstrom > --- > Cc: Piotr Piórkowski > Cc: Jakub Kolakowski > Cc: Marcin Bernatowicz > --- > drivers/gpu/drm/xe/xe_pci.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c > index e8ef7d6b4db8..6a8e82aff385 100644 > --- a/drivers/gpu/drm/xe/xe_pci.c > +++ b/drivers/gpu/drm/xe/xe_pci.c > @@ -367,6 +367,7 @@ static const struct xe_device_desc ptl_desc = { > PLATFORM(PANTHERLAKE), > .dma_mask_size = 46, > .has_display = true, > + .has_sriov = true, Acked-by: Rodrigo Vivi > .require_force_probe = true, > }; > > -- > 2.47.1 >