From: Zhao Liu <zhao1.liu@intel.com>
Date: Tue, 21 Jan 2025 15:13:22 +0000 (+0800)
Subject: memattrs: Check the size of MemTxAttrs
X-Git-Tag: v10.0.0-rc0~75^2~25
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=57f9d9c84a9112d534fa90f2a6dad74bd71150b6;p=thirdparty%2Fqemu.git

memattrs: Check the size of MemTxAttrs

Make sure MemTxAttrs is packed into 8 bytes and does not exceed 8 bytes.

Suggested-by: Philippe Mathieu-Daudà <philmd@linaro.org>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250121151322.171832-3-zhao1.liu@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index 4fde4eee84..060b7e7131 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -64,6 +64,8 @@ typedef struct MemTxAttrs {
     uint16_t _reserved2;
 } MemTxAttrs;
 
+QEMU_BUILD_BUG_ON(sizeof(MemTxAttrs) > 8);
+
 /* Bus masters which don't specify any attributes will get this,
  * which has all attribute bits clear except the topmost one
  * (so that we can distinguish "all attributes deliberately clear"