drm/etnaviv: mmuv2: don't map zero page

lynxeye-dev · lynxeye-dev · commit ef092dec043c · 2019-02-11T11:49:35.000+01:00
Keep the page at address 0 as faulting to catch any potential state
setup issues early.

Signed-off-by: Lucas Stach &lt;l.stach@pengutronix.de&gt;
Reviewed-by: Christian Gmeiner &lt;christian.gmeiner@gmail.com&gt;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_iommu_v2.c b/drivers/gpu/drm/etnaviv/etnaviv_iommu_v2.c
@@ -320,8 +320,8 @@ etnaviv_iommuv2_domain_alloc(struct etnaviv_gpu *gpu)
 	domain = &etnaviv_domain->base;
 
 	domain->dev = gpu->dev;
-	domain->base = 0;
-	domain->size = (u64)SZ_1G * 4;
+	domain->base = SZ_4K;
+	domain->size = (u64)SZ_1G * 4 - SZ_4K;
 	domain->ops = &etnaviv_iommuv2_ops;
 
 	ret = etnaviv_iommuv2_init(etnaviv_domain);
