[PATCH 2/2] mm/cma: accept memory of CMA areas reserved at a fixed address

[Mike Rapoport (Microsoft)]

CMA areas allocated from memblock have their memory accepted by
memblock_alloc_range_nid(), but areas reserved at a fixed address with
memblock_reserve() are not.

If a fixed CMA area is requested by the cma=<size>@<base> command line
parameter, it may be in regular RAM and on TDX and SEV-SNP guests it
must be accepted.

Accept the memory of fixed CMA areas as well, so that all CMA areas are
accepted regardless of how they were reserved.

Fixes: 75d090fd167a ("x86/tdx: Add unaccepted memory support")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
---
 mm/cma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/cma.c b/mm/cma.c
index 0035efb1130a5..f61d52796f4ef 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -381,6 +381,8 @@ static int __init cma_fixed_reserve(phys_addr_t base, phys_addr_t size)
 		return -EBUSY;
 	}
 
+	accept_memory(base, size);
+
 	return 0;
 }
 

-- 
2.53.0