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hw/mem/cxl_type3: Add DPA range validation for accesses to DC regions

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All DPA ranges in the DC regions are invalid to access until an extent
covering the range has been successfully accepted by the host. A bitmap
is added to each region to record whether a DC block in the region has
been backed by a DC extent. Each bit in the bitmap represents a DC block.
When a DC extent is accepted, all the bits representing the blocks in the
extent are set, which will be cleared when the extent is released.

Tested-by: Svetly Todorov <svetly.todorov@memverge.com>
Reviewed-by: Gregory Price <gregory.price@memverge.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Fan Ni <fan.ni@samsung.com>
Message-Id: <20240523174651.1089554-13-nifan.cxl@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Fan Ni 2024-05-23 10:44:52 -07:00 • committed by Michael S. Tsirkin
parent d0b9b28a5b
commit e4180db4e6
3 changed files with 86 additions and 0 deletions
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7
include/hw/cxl/cxl_device.h
View file

@ -456,6 +456,7 @@ typedef struct CXLDCRegion {
uint64_t block_size;
uint32_t dsmadhandle;
uint8_t flags;
unsigned long *blk_bitmap;
} CXLDCRegion;
struct CXLType3Dev {
@ -577,4 +578,10 @@ CXLDCExtentGroup *cxl_insert_extent_to_extent_group(CXLDCExtentGroup *group,
void cxl_extent_group_list_insert_tail(CXLDCExtentGroupList *list,
CXLDCExtentGroup *group);
void cxl_extent_group_list_delete_front(CXLDCExtentGroupList *list);
void ct3_set_region_block_backed(CXLType3Dev *ct3d, uint64_t dpa,
uint64_t len);
void ct3_clear_region_block_backed(CXLType3Dev *ct3d, uint64_t dpa,
uint64_t len);
bool ct3_test_region_block_backed(CXLType3Dev *ct3d, uint64_t dpa,
uint64_t len);
#endif