From: Tomasz Jeznach <tjezn...@rivosinc.com>
Extend memory transaction attributes with process identifier to allow
per-request address translation logic to use requester_id / process_id
to identify memory mapping (e.g. enabling IOMMU w/ PASID translations).
Signed-off-by: Tomasz Jeznach <tjezn...@rivosinc.com>
Reviewed-by: Frank Chang <frank.ch...@sifive.com>
Reviewed-by: Jason Chien <jason.ch...@sifive.com>
Reviewed-by: Alistair Francis <alistair.fran...@wdc.com>
Signed-off-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com>
---
include/exec/memattrs.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index 14cdd8d582..e27c18f3dc 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -52,6 +52,11 @@ typedef struct MemTxAttrs {
unsigned int memory:1;
/* Requester ID (for MSI for example) */
unsigned int requester_id:16;
+
+ /*
+ * PID (PCI PASID) support: Limited to 8 bits process identifier.
+ */
+ unsigned int pid:8;
} MemTxAttrs;
/* Bus masters which don't specify any attributes will get this,
--
2.45.2
