From: Mohamed Mediouni <mohamed@unpredictable.fr>
Date: Tue, 10 Feb 2026 11:34:49 +0000 (+0000)
Subject: target/arm: whpx: instantiate GIC early
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=515bf55441981a99ab8abd529df5c5c9a589aa62;p=thirdparty%2Fqemu.git

target/arm: whpx: instantiate GIC early

While figuring out a better spot for it, put it in whpx_accel_init.

Needs to be done before WHvSetupPartition.

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/target/arm/whpx/whpx-all.c b/target/arm/whpx/whpx-all.c
index c88c67a9e2..44ef42307b 100644
--- a/target/arm/whpx/whpx-all.c
+++ b/target/arm/whpx/whpx-all.c
@@ -939,6 +939,38 @@ int whpx_accel_init(AccelState *as, MachineState *ms)
 
     memset(&prop, 0, sizeof(prop));
 
+    /*
+     * The only currently supported configuration for the interrupt
+     * controller is kernel-irqchip=on,gic-version=3, with the `virt`
+     * machine.
+     *
+     * Initialising the vGIC here because it needs to be done prior to
+     * WHvSetupPartition.
+     */
+
+    WHV_ARM64_IC_PARAMETERS ic_params = {
+        .EmulationMode = WHvArm64IcEmulationModeGicV3,
+        .GicV3Parameters = {
+            .GicdBaseAddress = 0x08000000,
+            .GitsTranslaterBaseAddress = 0x08080000,
+            .GicLpiIntIdBits = 0,
+            .GicPpiPerformanceMonitorsInterrupt = VIRTUAL_PMU_IRQ,
+            .GicPpiOverflowInterruptFromCntv = ARCH_TIMER_VIRT_IRQ
+        }
+    };
+    prop.Arm64IcParameters = ic_params;
+
+    hr = whp_dispatch.WHvSetPartitionProperty(
+            whpx->partition,
+            WHvPartitionPropertyCodeArm64IcParameters,
+            &prop,
+            sizeof(prop));
+    if (FAILED(hr)) {
+        error_report("WHPX: Failed to enable GICv3 interrupt controller, hr=%08lx", hr);
+        ret = -EINVAL;
+        goto error;
+    }
+
     hr = whp_dispatch.WHvSetupPartition(whpx->partition);
     if (FAILED(hr)) {
         error_report("WHPX: Failed to setup partition, hr=%08lx", hr);