mshv-ioctls: enable PMU for arm64 guests

anirudhrb · anirudhrb · commit 0985748d0467 · 2025-09-10T11:24:50.000+05:30
Expose PMU to arm64 guests. Fixes the test_pmu_on testcase in CLH.

Signed-off-by: Anirudh Rayabharam &lt;anrayabh@microsoft.com&gt;
diff --git a/mshv-ioctls/CHANGELOG.md b/mshv-ioctls/CHANGELOG.md
@@ -5,6 +5,7 @@
 
 ### Changed
 * [[254]](https://github.com/rust-vmm/mshv/pull/254) Enable RDRAND support for x86 guests
+* [[253]](https://github.com/rust-vmm/mshv/pull/253) Enable PMU for arm64 guests
 
 ### Deprecated
 
diff --git a/mshv-ioctls/src/ioctls/system.rs b/mshv-ioctls/src/ioctls/system.rs
@@ -109,6 +109,8 @@ fn make_partition_create_arg(vm_type: VmType) -> mshv_create_partition_v2 {
         proc_features.__bindgen_anon_1.set_fp_hp(0);
         proc_features.__bindgen_anon_1.set_adv_simd(0);
         proc_features.__bindgen_anon_1.set_adv_simd_hp(0);
+
+        proc_features.__bindgen_anon_1.set_pmu_v3(0);
     }
 
     // SAFETY: access union fields

Original file line number	Diff line number	Diff line change
`@@ -109,6 +109,8 @@ fn make_partition_create_arg(vm_type: VmType) -> mshv_create_partition_v2 {`
`109`	`109`	`proc_features.__bindgen_anon_1.set_fp_hp(0);`
`110`	`110`	`proc_features.__bindgen_anon_1.set_adv_simd(0);`
`111`	`111`	`proc_features.__bindgen_anon_1.set_adv_simd_hp(0);`
	`112`	`+`
	`113`	`+ proc_features.__bindgen_anon_1.set_pmu_v3(0);`
`112`	`114`	`}`
`113`	`115`
`114`	`116`	`// SAFETY: access union fields`