[Xen-devel] [PATCH 1/2] x86/hvm: make sure HVM_PARAM_[BUF]IOREQ_PFN can only be set once

[Paul Durrant <paul.durrant@xxxxxxxxxx>]

These parameters should have always been in the 'set once' category
but this has, so far, not been enforced.

Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/arch/x86/hvm/hvm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 51fc3ec07f..07ec20fb52 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -4083,6 +4083,8 @@ static int hvm_allow_set_param(struct domain *d,
     {
     /* The following parameters should only be changed once. */
     case HVM_PARAM_VIRIDIAN:
+    case HVM_PARAM_IOREQ_PFN:
+    case HVM_PARAM_BUFIOREQ_PFN:
     case HVM_PARAM_IOREQ_SERVER_PFN:
     case HVM_PARAM_NR_IOREQ_SERVER_PAGES:
     case HVM_PARAM_ALTP2M:
-- 
2.11.0


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