NAME¶
cxl_get_prefault_mode - get the mode for prefaulting segments
SYNOPSIS¶
#include <libcxl.h>
int cxl_get_prefault_mode(struct cxl_afu_h
*afu, enum cxl_prefault_mode *valp);
DESCRIPTION¶
cxl_get_prefault_mode() gets the current mode used for prefaulting in
segments into the segment table when performing cxl_afu_attach(). The
prefault_mode of afu is copied to the long integer pointed to by
valp. Mode will be one of the enum cxl_prefault_mode values:
- CXL_PREFAULT_MODE_NONE
- No prefaulting (default).
- CXL_PREFAULT_MODE_WED
- Treat the work element descriptor as an effective address and prefault
what it points to.
- CXL_PREFAULT_MODE_ALL
- Prefault all the segments mapped by the process calling
cxl_afu_attach(), cxl_afu_attach_full() or
cxl_afu_attach_work().
RETURN VALUE¶
On success, 0 is returned. On error, -1 is returned and errno is set
appropriately.
ERRORS¶
- EINVAL
- Invalid argument value.
- ENOMEM
- Insufficient memory.
SEE ALSO¶
cxl(3), cxl_adapter_afu_next(3), cxl_afu_attach(3),
cxl_afu_attach_full(3), cxl_afu_attach_work(3),
cxl_afu_next(3), cxl_get_api_version(3),
cxl_get_api_version_compatible(3), cxl_get_irqs_max(3),
cxl_get_irqs_min(3), cxl_get_mode(3),
cxl_get_modes_supported(3), cxl_set_prefault_mode(3)
