[v2,8/8] target/loongarch: Add virtual extioi feature enabling

Commit Message

Bibo Mao Feb. 24, 2025, 3:27 a.m. UTC

Feature virtual extioi is loongArch virt machine property rather than
vCPU property in qemu side. However it is vCPU property in KVM kernel
side, here add loongArch virt machine property checking and enable virt
extioi feature when vCPU is created.

Signed-off-by: Bibo Mao <[e-mail]>
---
 hw/loongarch/virt.c         |  8 --------
 include/hw/loongarch/virt.h |  9 +++++++++
 target/loongarch/kvm/kvm.c  | 10 ++++++++++
 3 files changed, 19 insertions(+), 8 deletions(-)

Patch

diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index f2aa0a9782..59533b058b 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -45,14 +45,6 @@ 
 #include "hw/virtio/virtio-iommu.h"
 #include "qemu/error-report.h"
 
-static bool virt_is_veiointc_enabled(LoongArchVirtMachineState *lvms)
-{
-    if (lvms->veiointc == ON_OFF_AUTO_OFF) {
-        return false;
-    }
-    return true;
-}
-
 static void virt_get_veiointc(Object *obj, Visitor *v, const char *name,
                               void *opaque, Error **errp)
 {
diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h
index 661efae61d..2e7cdfaef0 100644
--- a/include/hw/loongarch/virt.h
+++ b/include/hw/loongarch/virt.h
@@ -68,4 +68,13 @@  struct LoongArchVirtMachineState {
 OBJECT_DECLARE_SIMPLE_TYPE(LoongArchVirtMachineState, LOONGARCH_VIRT_MACHINE)
 void virt_acpi_setup(LoongArchVirtMachineState *lvms);
 void virt_fdt_setup(LoongArchVirtMachineState *lvms);
+
+static inline bool virt_is_veiointc_enabled(LoongArchVirtMachineState *lvms)
+{
+    if (lvms->veiointc == ON_OFF_AUTO_OFF) {
+        return false;
+    }
+    return true;
+}
+
 #endif
diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c
index 13cdce5790..9677801dc1 100644
--- a/target/loongarch/kvm/kvm.c
+++ b/target/loongarch/kvm/kvm.c
@@ -21,6 +21,7 @@ 
 #include "exec/address-spaces.h"
 #include "hw/boards.h"
 #include "hw/irq.h"
+#include "hw/loongarch/virt.h"
 #include "qemu/log.h"
 #include "hw/loader.h"
 #include "system/runstate.h"
@@ -1023,6 +1024,7 @@  static int kvm_cpu_check_pmu(CPUState *cs, Error **errp)
 
 static int kvm_cpu_check_pv_features(CPUState *cs, Error **errp)
 {
+    MachineState *ms = MACHINE(qdev_get_machine());
     LoongArchCPU *cpu = LOONGARCH_CPU(cs);
     CPULoongArchState *env = cpu_env(cs);
     bool kvm_supported;
@@ -1055,6 +1057,14 @@  static int kvm_cpu_check_pv_features(CPUState *cs, Error **errp)
         env->pv_features |= BIT(KVM_FEATURE_STEAL_TIME);
     }
 
+    if (object_dynamic_cast(OBJECT(ms), TYPE_LOONGARCH_VIRT_MACHINE)) {
+        LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(ms);
+
+        if (virt_is_veiointc_enabled(lvms)) {
+            env->pv_features |= BIT(KVM_FEATURE_VIRT_EXTIOI);
+        }
+    }
+
     return 0;
 }