drm/amdkfd: don't allow mapping the MMIO HDP page with large pages

From Alex Deucher
4b4cff994a27ebf7bd3fb9a798a1cdfa8d01b724 in linux-6.6.y/6.6.3
be4a2a81b6b90d1a47eaeaace4cc8e2cb57b96c7 in mainline linux

diff --git a/sys/dev/pci/drm/amd/amdkfd/kfd_chardev.c b/sys/dev/pci/drm/amd/amdkfd/kfd_chardev.c
index f22b4cd..010e4af 100644 (file)
--- a/sys/dev/pci/drm/amd/amdkfd/kfd_chardev.c
+++ b/sys/dev/pci/drm/amd/amdkfd/kfd_chardev.c
@@ -1138,7 +1138,7 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep,
                        goto err_unlock;
                }
                offset = dev->adev->rmmio_remap.bus_addr;
-               if (!offset) {
+               if (!offset || (PAGE_SIZE > 4096)) {
                        err = -ENOMEM;
                        goto err_unlock;
                }
@@ -2307,7 +2307,7 @@ static int criu_restore_memory_of_gpu(struct kfd_process_device *pdd,
                        return -EINVAL;
                }
                offset = pdd->dev->adev->rmmio_remap.bus_addr;
-               if (!offset) {
+               if (!offset || (PAGE_SIZE > 4096)) {
                        pr_err("amdgpu_amdkfd_get_mmio_remap_phys_addr failed\n");
                        return -ENOMEM;
                }
@@ -3348,6 +3348,9 @@ static int kfd_mmio_mmap(struct kfd_node *dev, struct kfd_process *process,
        if (vma->vm_end - vma->vm_start != PAGE_SIZE)
                return -EINVAL;
 
+       if (PAGE_SIZE > 4096)
+               return -EINVAL;
+
        address = dev->adev->rmmio_remap.bus_addr;
 
        vm_flags_set(vma, VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |