[Xen-changelog] [xen-unstable] hvm ioemu: Add support for IOREQ_TYPE_XCHG in qemu-dm.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1174062149 0
# Node ID 670aef15eb553ea47d5abbbbc2a30d9b60dfd94f
# Parent  f8ef8f4662253e68b577bd81df4be12c7c7cb860
hvm ioemu: Add support for IOREQ_TYPE_XCHG in qemu-dm.

From: Trolle Selander <trolle.selander@xxxxxxxxx>
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 tools/ioemu/target-i386-dm/helper2.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+)

diff -r f8ef8f466225 -r 670aef15eb55 tools/ioemu/target-i386-dm/helper2.c
--- a/tools/ioemu/target-i386-dm/helper2.c      Fri Mar 16 16:21:16 2007 +0000
+++ b/tools/ioemu/target-i386-dm/helper2.c      Fri Mar 16 16:22:29 2007 +0000
@@ -439,6 +439,18 @@ void cpu_ioreq_xor(CPUState *env, ioreq_
     req->data = tmp1;
 }
 
+void cpu_ioreq_xchg(CPUState *env, ioreq_t *req)
+{
+    unsigned long tmp1;
+
+    if (req->data_is_ptr != 0)
+        hw_error("expected scalar value");
+
+    read_physical(req->addr, req->size, &tmp1);
+    write_physical(req->addr, req->size, &req->data);
+    req->data = tmp1;
+}
+
 void __handle_ioreq(CPUState *env, ioreq_t *req)
 {
     if (!req->data_is_ptr && req->dir == IOREQ_WRITE && req->size != 4)
@@ -462,6 +474,9 @@ void __handle_ioreq(CPUState *env, ioreq
         break;
     case IOREQ_TYPE_XOR:
         cpu_ioreq_xor(env, req);
+        break;
+    case IOREQ_TYPE_XCHG:
+        cpu_ioreq_xchg(env, req);
         break;
     default:
         hw_error("Invalid ioreq type 0x%x\n", req->type);

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