plugin: allow retrieving list of supported MSRs

Add crossvm plugin API to allow fetching list of supported MSRs.

BUG=b:111083877
TEST=cargo test -p kvm; cargo test --features=plugin

Change-Id: I178c7bc33d606bef10422faac6bb9afb3fe0a014
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1152229
Reviewed-by: Zach Reizner <zachr@chromium.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/plugin/process.rs b/src/plugin/process.rs
index f816955..0e8a74f 100644
--- a/src/plugin/process.rs
+++ b/src/plugin/process.rs
@@ -634,6 +634,17 @@ impl Process {
                 }
                 Err(e) => Err(e),
             }
+        } else if request.has_get_msr_index_list() {
+            let msr_list_response = &mut response.mut_get_msr_index_list().indices;
+            match kvm.get_msr_index_list() {
+                Ok(indices) => {
+                    for entry in indices {
+                        msr_list_response.push(entry);
+                    }
+                    Ok(())
+                }
+                Err(e) => Err(e),
+            }
         } else {
             Err(SysError::new(ENOTTY))
         };