Commit ac4af772ad for qemu.org

commit ac4af772ade858aa2a7cd23150fe43b3748ceb11
Author: Mohamed Mediouni <mohamed@unpredictable.fr>
Date:   Tue Feb 10 11:34:49 2026 +0000

    whpx: arm64: add partition-wide reset on the reboot path

    This resets non-architectural state to allow for reboots to succeed.

    Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
    Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
    Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
    Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/include/system/whpx-internal.h b/include/system/whpx-internal.h
index 8ded54a39b..ad6ade223e 100644
--- a/include/system/whpx-internal.h
+++ b/include/system/whpx-internal.h
@@ -86,6 +86,8 @@ void whpx_apic_get(APICCommonState *s);
   X(HRESULT, WHvSetVirtualProcessorInterruptControllerState2, \
         (WHV_PARTITION_HANDLE Partition, UINT32 VpIndex, PVOID State, \
          UINT32 StateSize)) \
+  X(HRESULT, WHvResetPartition, \
+        (WHV_PARTITION_HANDLE Partition)) \

 #define LIST_WINHVEMULATION_FUNCTIONS(X) \
   X(HRESULT, WHvEmulatorCreateEmulator, (const WHV_EMULATOR_CALLBACKS* Callbacks, WHV_EMULATOR_HANDLE* Emulator)) \
diff --git a/target/arm/whpx/whpx-all.c b/target/arm/whpx/whpx-all.c
index 44ef42307b..36c5e30a03 100644
--- a/target/arm/whpx/whpx-all.c
+++ b/target/arm/whpx/whpx-all.c
@@ -497,6 +497,8 @@ int whpx_vcpu_run(CPUState *cpu)
             if (arm_cpu->power_state != PSCI_OFF) {
                 whpx_psci_cpu_off(arm_cpu);
             }
+            /* Partition-wide reset, to reset state for reboots to succeed. */
+            whp_dispatch.WHvResetPartition(whpx->partition);
             bql_unlock();
             break;
         case WHvRunVpExitReasonNone: