ocxl: Add get_metadata IOCTL to share OCXL information to userspace
Some required information is not exposed to userspace currently (eg. the PASID), pass this information back, along with other information which is currently communicated via sysfs, which saves some parsing effort in userspace. Signed-off-by: NAlastair D'Silva <alastair@d-silva.org> Acked-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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