[RFC PATCH 3/5] memattrs: Add user-defined attribute

From: Joe Komlodi <komlodi@google.com>
To: qemu-devel@nongnu.org
Cc: pbonzini@redhat.com, peterx@redhat.com, david@redhat.com,
	 peter.maydell@linaro.org, marcel.apfelbaum@gmail.com,
	mst@redhat.com,  philmd@linaro.org, roqueh@google.com,
	slongfield@google.com,  komlodi@google.com
Subject: [RFC PATCH 3/5] memattrs: Add user-defined attribute
Date: Tue, 27 Feb 2024 22:24:15 +0000	[thread overview]
Message-ID: <20240227222417.929367-4-komlodi@google.com> (raw)
In-Reply-To: <20240227222417.929367-1-komlodi@google.com>

These are used to represent implementation-specific data.
These are based off of AMBA-AXI user signals, but can be used in any
implementation.

The length of 4-bits is arbitrary.

Signed-off-by: Joe Komlodi <komlodi@google.com>
---
 include/exec/memattrs.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index 942b721be8..a38645f881 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -64,6 +64,8 @@ typedef struct MemTxAttrs {
     unsigned int target_tlb_bit0:1;
     unsigned int target_tlb_bit1:1;
     unsigned int target_tlb_bit2:1;
+    /* User-defined bits represent data that is implementation defined. */
+    unsigned int user_defined:4;
 } MemTxAttrs;
 
 /* Bus masters which don't specify any attributes will get this,
-- 
2.44.0.rc0.258.g7320e95886-goog


