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[PATCH] machine/memory encryption: Disable mem merge
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[PATCH] machine/memory encryption: Disable mem merge |
Date: |
Thu, 30 Jan 2020 17:50:46 +0000 |
From: "Dr. David Alan Gilbert" <address@hidden>
When a host is running with memory encryption, the memory isn't visible
to the host kernel; attempts to merge that memory are futile because
what it's really comparing is encrypted memory, usually encrypted
with different keys.
Automatically turn mem-merge off when memory encryption is specified.
https://bugzilla.redhat.com/show_bug.cgi?id=1796356
Signed-off-by: Dr. David Alan Gilbert <address@hidden>
---
hw/core/machine.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 3e288bfceb..029e1f85b8 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -419,6 +419,14 @@ static void machine_set_memory_encryption(Object *obj,
const char *value,
g_free(ms->memory_encryption);
ms->memory_encryption = g_strdup(value);
+
+ /*
+ * With memory encryption, the host can't see the real contents of RAM,
+ * so there's no point in it trying to merge areas.
+ */
+ if (value) {
+ machine_set_mem_merge(obj, false, errp);
+ }
}
static bool machine_get_nvdimm(Object *obj, Error **errp)
--
2.24.1
- [PATCH] machine/memory encryption: Disable mem merge,
Dr. David Alan Gilbert (git) <=