hw/misc/aspeed_hace: Support DMA 64 bits dram address

According to the AST2700 design, the data source address is 64-bit, with
R_HASH_SRC_HI storing bits [63:32] and R_HASH_SRC storing bits [31:0].

Similarly, the digest address is 64-bit, with R_HASH_DEST_HI storing bits
[63:32] and R_HASH_DEST storing bits [31:0].

To maintain compatibility with older SoCs such as the AST2600, the AST2700 HW
automatically set bit 34 of the 64-bit sg_addr. As a result, the firmware
only needs to provide a 32-bit sg_addr containing bits [31:0]. This is
sufficient for the AST2700, as it uses a DRAM offset rather than a DRAM
address.

Introduce a has_dma64 class attribute and set it to true for the AST2700.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250515081008.583578-15-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/hw/misc/aspeed_hace.h b/include/hw/misc/aspeed_hace.h
index 9945b61863..d5d07c6c02 100644
--- a/include/hw/misc/aspeed_hace.h
+++ b/include/hw/misc/aspeed_hace.h
@@ -53,6 +53,7 @@ struct AspeedHACEClass {
     uint32_t src_hi_mask;
     uint32_t dest_hi_mask;
     uint32_t key_hi_mask;
+    bool has_dma64;
 };
 
 #endif /* ASPEED_HACE_H */