hw/i386/x86-iommu: Remove X86IOMMUState::pt_supported field

The X86IOMMUState::pt_supported boolean was only set in
the hw_compat_2_9[] array, via the 'pt=off' property. We
removed all machines using that array, lets remove that
property and all the code around it, always setting the
VTD_ECAP_PT capability.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250501210456.89071-19-philmd@linaro.org>
[thuth: Dropped the hunks that were already merged via commit 31753d5a33]
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20260225092024.794595-16-thuth@redhat.com>

hw/i386/intel_iommu.c

@@ -1072,6 +1072,7 @@ static inline bool vtd_ce_type_check(X86IOMMUState *x86_iommu,
 {
     switch (vtd_ce_get_type(ce)) {
     case VTD_CONTEXT_TT_MULTI_LEVEL:
+    case VTD_CONTEXT_TT_PASS_THROUGH:
         /* Always supported */
         break;
     case VTD_CONTEXT_TT_DEV_IOTLB:
@@ -1080,12 +1081,6 @@ static inline bool vtd_ce_type_check(X86IOMMUState *x86_iommu,
             return false;
         }
         break;
-    case VTD_CONTEXT_TT_PASS_THROUGH:
-        if (!x86_iommu->pt_supported) {
-            error_report_once("%s: PT specified but not supported", __func__);
-            return false;
-        }
-        break;
     default:
         /* Unknown type */
         error_report_once("%s: unknown ce type: %"PRIu32, __func__,
@@ -5004,7 +4999,7 @@ static void vtd_cap_init(IntelIOMMUState *s)
 {
     X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s);
 
-    s->cap = VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND |
+    s->cap = VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND | VTD_ECAP_PT |
              VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SSLPS |
              VTD_CAP_ESRTPS | VTD_CAP_MGAW(s->aw_bits);
     if (s->dma_drain) {
@@ -5032,10 +5027,6 @@ static void vtd_cap_init(IntelIOMMUState *s)
         s->ecap |= VTD_ECAP_DT;
     }
 
-    if (x86_iommu->pt_supported) {
-        s->ecap |= VTD_ECAP_PT;
-    }
-
     if (s->caching_mode) {
         s->cap |= VTD_CAP_CM;
     }

hw/i386/x86-iommu.c

@@ -129,7 +129,6 @@ static const Property x86_iommu_properties[] = {
     DEFINE_PROP_ON_OFF_AUTO("intremap", X86IOMMUState,
                             intr_supported, ON_OFF_AUTO_AUTO),
     DEFINE_PROP_BOOL("device-iotlb", X86IOMMUState, dt_supported, false),
-    DEFINE_PROP_BOOL("pt", X86IOMMUState, pt_supported, true),
     DEFINE_PROP_BOOL("dma-translation", X86IOMMUState, dma_translation, true),
 };
 

include/hw/i386/x86-iommu.h

@@ -63,7 +63,6 @@ struct X86IOMMUState {
     SysBusDevice busdev;
     OnOffAuto intr_supported;   /* Whether vIOMMU supports IR */
     bool dt_supported;          /* Whether vIOMMU supports DT */
-    bool pt_supported;          /* Whether vIOMMU supports pass-through */
     bool dma_translation;       /* Whether vIOMMU supports DMA translation */
     QLIST_HEAD(, IEC_Notifier) iec_notifiers; /* IEC notify list */
 };