From 6bb05b3631bd81227298b291b651dc7ec6ee0145 Mon Sep 17 00:00:00 2001 From: Michal Wajdeczko Date: Thu, 6 Feb 2025 22:45:45 +0100 Subject: [PATCH] drm/xe: Enable SR-IOV for PTL MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Acked-by: Rodrigo Vivi Reviewed-by: Jakub Kolakowski Tested-by: Marcin Bernatowicz Reviewed-by: Marcin Bernatowicz Link: https://patchwork.freedesktop.org/patch/msgid/20250206214545.940-1-michal.wajdeczko@intel.com --- 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 cfa1ad7a1f2d..663bfc29cddc 100644 --- a/drivers/gpu/drm/xe/xe_pci.c +++ b/drivers/gpu/drm/xe/xe_pci.c @@ -363,6 +363,7 @@ static const struct xe_device_desc ptl_desc = { PLATFORM(PANTHERLAKE), .dma_mask_size = 46, .has_display = true, + .has_sriov = true, .require_force_probe = true, }; -- 2.50.1