Commit 188f4826 authored by Alex Sierra's avatar Alex Sierra Committed by Andrew Morton
Browse files

lib: test_hmm add ioctl to get zone device type 

Add new ioctl cmd to query zone device type.  This will be used once the
test_hmm adds zone device coherent type.

Link: https://lkml.kernel.org/r/20220715150521.18165-9-alex.sierra@amd.com


Signed-off-by: default avatarAlex Sierra <alex.sierra@amd.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarAlistair Poppple <apopple@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent c83dee9b

lib/test_hmm.c

+9 −2
Original line number Diff line number Diff line
@@ -87,6 +87,7 @@ struct dmirror_chunk { 
struct dmirror_device {

	struct cdev		cdevice;

	struct hmm_devmem	*devmem;

	unsigned int            zone_device_type;



	unsigned int		devmem_capacity;

	unsigned int		devmem_count;
@@ -1266,14 +1267,20 @@ static void dmirror_device_remove(struct dmirror_device *mdevice) 
static int __init hmm_dmirror_init(void)

{

	int ret;

	int id;

	int id = 0;

	int ndevices = 0;



	ret = alloc_chrdev_region(&dmirror_dev, 0, DMIRROR_NDEVICES,

				  "HMM_DMIRROR");

	if (ret)

		goto err_unreg;



	for (id = 0; id < DMIRROR_NDEVICES; id++) {

	memset(dmirror_devices, 0, DMIRROR_NDEVICES * sizeof(dmirror_devices[0]));

	dmirror_devices[ndevices++].zone_device_type =

				HMM_DMIRROR_MEMORY_DEVICE_PRIVATE;

	dmirror_devices[ndevices++].zone_device_type =

				HMM_DMIRROR_MEMORY_DEVICE_PRIVATE;

	for (id = 0; id < ndevices; id++) {

		ret = dmirror_device_init(dmirror_devices + id, id);

		if (ret)

			goto err_chrdev;

lib/test_hmm_uapi.h

+10 −4
Original line number Diff line number Diff line
@@ -31,10 +31,11 @@ struct hmm_dmirror_cmd { 
/* Expose the address space of the calling process through hmm device file */

#define HMM_DMIRROR_READ		_IOWR('H', 0x00, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_WRITE		_IOWR('H', 0x01, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_MIGRATE		_IOWR('H', 0x02, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_SNAPSHOT		_IOWR('H', 0x03, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_EXCLUSIVE		_IOWR('H', 0x04, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_CHECK_EXCLUSIVE	_IOWR('H', 0x05, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_MIGRATE_TO_DEV	_IOWR('H', 0x02, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_MIGRATE_TO_SYS	_IOWR('H', 0x03, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_SNAPSHOT		_IOWR('H', 0x04, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_EXCLUSIVE		_IOWR('H', 0x05, struct hmm_dmirror_cmd)

#define HMM_DMIRROR_CHECK_EXCLUSIVE	_IOWR('H', 0x06, struct hmm_dmirror_cmd)



/*

 * Values returned in hmm_dmirror_cmd.ptr for HMM_DMIRROR_SNAPSHOT.
@@ -62,4 +63,9 @@ enum { 
	HMM_DMIRROR_PROT_DEV_PRIVATE_REMOTE	= 0x30,

};



enum {

	/* 0 is reserved to catch uninitialized type fields */

	HMM_DMIRROR_MEMORY_DEVICE_PRIVATE = 1,

};



#endif /* _LIB_TEST_HMM_UAPI_H */