mirror of
https://github.com/torvalds/linux
synced 2024-10-10 13:24:04 +00:00
27d4dc7116
Given a file descriptor on an afu device, libcxl currently uses the major/minor number obtained from fstat on the fd to construct path to the afu's sysfs directory. However it is possible that rather than using one of the device in /dev/cxl, a kernel driver creates its own device which export generic cxl interface to the userspace. This causes problems with libcxl as it tries to use a wrong major/minor number to construct the sysfs path and fail. So this patch introduces a new ioctl called CXL_IOCTL_GET_AFU_ID on the afu file descriptor to fetch the cxl_afu_id struct that holds the card/offset-id and mode information. These info is then used by libcxl to construct the correct path to the afu sysfs directory. Testing: - Build against pseries be/le configs - Testing with corresponding libcxl changes to verify that it constructs right sysfs path to the afu. Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
||
---|---|---|
.. | ||
base.c | ||
context.c | ||
cxl.h | ||
debugfs.c | ||
fault.c | ||
file.c | ||
irq.c | ||
Kconfig | ||
main.c | ||
Makefile | ||
native.c | ||
pci.c | ||
sysfs.c | ||
trace.c | ||
trace.h |