[PATCH v4 4/4] drm/xe/vf: Do not disable VF migration on ATS-M

[Tomasz Lis <tomasz.lis@intel.com>]

The ATS-M does support VF migration, and it has graphics ver below
the currently allowed range. Experimental support of this platform
should therefore be available.

This change allows experimental VF migration support on ATS-M. It
is also explicitly not allowing ADL, by adding condition on MEMIRQ.
Supporting VF migration through MMIO interrupts would require
some special handling in order to achieve reliability.

v2: Add MEMIRQ condition

v3: Remove platform version check, as only 12+ are supported by Xe
 driver anyway (Michal)

Signed-off-by: Tomasz Lis <tomasz.lis@intel.com>
---
 drivers/gpu/drm/xe/xe_sriov_vf.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_sriov_vf.c b/drivers/gpu/drm/xe/xe_sriov_vf.c
index 3a3cd9c35aa8..75760da247f4 100644
--- a/drivers/gpu/drm/xe/xe_sriov_vf.c
+++ b/drivers/gpu/drm/xe/xe_sriov_vf.c
@@ -159,10 +159,8 @@ static void vf_migration_init_early(struct xe_device *xe)
 		return xe_sriov_vf_migration_disable(xe,
 				"experimental feature not available on production builds");
 
-	if (GRAPHICS_VER(xe) < 20)
-		return xe_sriov_vf_migration_disable(xe,
-				"requires gfx version >= 20, but only %u found",
-				GRAPHICS_VER(xe));
+	if (!xe_device_has_memirq(xe))
+		return xe_sriov_vf_migration_disable(xe, "requires memory-based IRQ support");
 
 	xe->sriov.vf.migration.enabled = true;
 }
-- 
2.25.1