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| author | Dominic Chen <d.c.ddcc@gmail.com> | 2020-03-09 14:53:23 -0400 |
|---|---|---|
| committer | Moritz Fischer <mdf@kernel.org> | 2020-04-29 20:37:12 -0700 |
| commit | a2b9d4eadb7727772698d06e4cbeb1a1e2538675 (patch) | |
| tree | b0212825d1ab2e2f44dc27d0b3e476b2208d43a5 /drivers/fpga | |
| parent | 5a53881580f90a5e4404954af16a5646ee9d7842 (diff) | |
| download | linux-a2b9d4eadb7727772698d06e4cbeb1a1e2538675.tar.bz2 | |
fpga: dfl: afu: support debug access to memory-mapped afu regions
Allow debug access to memory-mapped regions using e.g. gdb.
Signed-off-by: Dominic Chen <d.c.ddcc@gmail.com>
Acked-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Diffstat (limited to 'drivers/fpga')
| -rw-r--r-- | drivers/fpga/dfl-afu-main.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c index 435bde40f361..b0c31789a909 100644 --- a/drivers/fpga/dfl-afu-main.c +++ b/drivers/fpga/dfl-afu-main.c @@ -750,6 +750,12 @@ static long afu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return -EINVAL; } +static const struct vm_operations_struct afu_vma_ops = { +#ifdef CONFIG_HAVE_IOREMAP_PROT + .access = generic_access_phys, +#endif +}; + static int afu_mmap(struct file *filp, struct vm_area_struct *vma) { struct platform_device *pdev = filp->private_data; @@ -779,6 +785,9 @@ static int afu_mmap(struct file *filp, struct vm_area_struct *vma) !(region.flags & DFL_PORT_REGION_WRITE)) return -EPERM; + /* Support debug access to the mapping */ + vma->vm_ops = &afu_vma_ops; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); return remap_pfn_range(vma, vma->vm_start, |