Re: [RFC PATCH v2 03/21] HostMem: Add private property and associate it with RAM_KVM_GMEM

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On 9/19/2023 5:46 PM, Markus Armbruster wrote:
Xiaoyao Li <xiaoyao.li@xxxxxxxxx> writes:

From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>

Add a new property "private" to memory backends. When it's set to true,
it indicates the RAMblock of the backend also requires kvm gmem.

Can you add a brief explanation why you need the property?

It provides a mechanism for user to specify whether the memory can serve as private memory (need request kvm gmem).

Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
Signed-off-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>

[...]

diff --git a/qapi/qom.json b/qapi/qom.json
index fa3e88c8e6ab..d28c5403bc0f 100644
--- a/qapi/qom.json
+++ b/qapi/qom.json
@@ -605,6 +605,9 @@
  # @reserve: if true, reserve swap space (or huge pages) if applicable
  #     (default: true) (since 6.1)
  #
+# @private: if true, use KVM gmem private memory (default: false)
+#     (since 8.2)
+#
  # @size: size of the memory region in bytes
  #
  # @x-use-canonical-path-for-ramblock-id: if true, the canonical path
@@ -631,6 +634,7 @@
              '*prealloc-context': 'str',
              '*share': 'bool',
              '*reserve': 'bool',
+            '*private': 'bool',
              'size': 'size',
              '*x-use-canonical-path-for-ramblock-id': 'bool' } }





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