[v16] WHPX support for Arm

[PATCH v16 25/26] whpx: arm64: add partition-wide reset on the reboot path

Mohamed Mediouni posted 26 patches 3 weeks, 2 days ago

Diff against v1 v2 v3 v4 v5 v6 v7 v8 v9 v9 v10 v11 v12 v13 v14 v15 v17 v18 v19 v20 v21 v22
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Maintainers: Cameron Esfahani <dirty@apple.com>, Roman Bolshakov <rbolshakov@ddn.com>, Phil Dennis-Jordan <phil@philjordan.eu>, Mads Ynddal <mads@ynddal.dk>, Pedro Barbuda <pbarbuda@microsoft.com>, Mohamed Mediouni <mohamed@unpredictable.fr>, Peter Maydell <peter.maydell@linaro.org>, Shannon Zhao <shannon.zhaosl@gmail.com>, "Michael S. Tsirkin" <mst@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Ani Sinha <anisinha@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Yanan Wang <wangyanan55@huawei.com>, Zhao Liu <zhao1.liu@intel.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Alexander Graf <agraf@csgraf.de>

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[PATCH v16 25/26] whpx: arm64: add partition-wide reset on the reboot path

Posted by Mohamed Mediouni 3 weeks, 2 days ago

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>
---
 include/system/whpx-internal.h | 2 ++
 target/arm/whpx/whpx-all.c     | 2 ++
 2 files changed, 4 insertions(+)

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 79e9065d3a..7434735a4f 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:
-- 
2.50.1 (Apple Git-155)