[v12] WHPX support for Arm

[PATCH v12 27/28] whpx: arm64: add partition-wide reset on the reboot path

Mohamed Mediouni posted 28 patches 1 week, 2 days ago

Diff against v1 v2 v3 v4 v5 v6 v7 v8 v9 v9 v10 v11 v13
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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>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, "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 v12 27/28] whpx: arm64: add partition-wide reset on the reboot path

Posted by Mohamed Mediouni 1 week, 2 days ago

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

Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
---
 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 9e872e5f56..802fa87765 100644
--- a/include/system/whpx-internal.h
+++ b/include/system/whpx-internal.h
@@ -94,6 +94,8 @@ void whpx_apic_get(APICCommonState *s);
         (WHV_PARTITION_HANDLE Partition, UINT32 VpIndex, \
         WHV_VIRTUAL_PROCESSOR_STATE_TYPE StateType, PVOID Buffer, \
         UINT32 BufferSizeInBytes)) \
+  X(HRESULT, WHvResetPartition, \
+        (WHV_PARTITION_HANDLE Partition)) \
 
 
 #define LIST_WINHVEMULATION_FUNCTIONS(X) \
diff --git a/target/arm/whpx/whpx-all.c b/target/arm/whpx/whpx-all.c
index 2e5ece45ea..0e80ef771c 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)

Re: [PATCH v12 27/28] whpx: arm64: add partition-wide reset on the reboot path

Posted by Pierrick Bouvier 1 week, 1 day ago

On 12/28/25 3:54 PM, Mohamed Mediouni wrote:
> This resets non-architectural state to allow for reboots to succeed.
> 
> Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
> ---
>   include/system/whpx-internal.h | 2 ++
>   target/arm/whpx/whpx-all.c     | 2 ++
>   2 files changed, 4 insertions(+)
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>