[PATCH 01/11] memattrs: add debug attribute

Ashish Kalra
2020-11-16T18:49:35Z

From: Brijesh Singh <brijesh.singh@amd.com>

From: Brijesh Singh <brijesh.singh@amd.com>

Extend the MemTxAttrs to include a 'debug' flag. The flag can be used as
general indicator that operation was triggered by the debugger.

A subsequent patch will set the debug=1 when issuing a memory access
from the gdbstub or HMP commands. This is a prerequisite to support
debugging an encrypted guest. When a request with debug=1 is seen, the
encryption APIs will be used to access the guest memory.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
---
include/exec/memattrs.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index 95f2d20d55..c8b56389d6 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -49,6 +49,8 @@ typedef struct MemTxAttrs {
unsigned int target_tlb_bit0 : 1;
unsigned int target_tlb_bit1 : 1;
unsigned int target_tlb_bit2 : 1;
+ /* Memory access request from the debugger */
+ unsigned int debug:1;
} MemTxAttrs;

/* Bus masters which don't specify any attributes will get this,
--
2.17.1