qemu-kvm/kvm-qdev-Add-an-OasMode-property-type.patch

From e61bd5408af80f3150d8508954a837582a32f3aa Mon Sep 17 00:00:00 2001
From: Nathan Chen <nathanc@nvidia.com>
Date: Tue, 24 Mar 2026 14:02:29 +0000
Subject: [PATCH 062/111] qdev: Add an OasMode property type
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RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 505: SMMU Rebase for accelerated SMMU and CMDQV support
RH-Jira: RHEL-142465 RHEL-160190 RHEL-163596 RHEL-73794 RHEL-73796 RHEL-73798
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
RH-Acked-by: Gavin Shan <gshan@redhat.com>
RH-Commit: [62/111] c760b42d4840853231ecc1e85f7e0f514a53686d (eauger1/centos-qemu-kvm)

JIRA: https://redhat.atlassian.net/browse/RHEL-160190

Introduce a new enum type property allowing to set an Output Address
Size. Values are auto, 32, 36, 40, 42, 44, 48, 52, and 56, where a
value of N specifies an N-bit OAS.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Shameer Kolothum <skolothumtho@nvidia.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Nathan Chen <nathanc@nvidia.com>
Message-id: 20260323182454.1416110-7-nathanc@nvidia.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit d3d2de3d227b63db5715fcaa89df388c929c7aba)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/core/qdev-properties-system.c    | 13 +++++++++++++
 include/hw/qdev-properties-system.h |  3 +++
 qapi/misc-arm.json                  | 28 ++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+)

diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index 67b3ce3a16..93b2c58ebe 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -737,6 +737,19 @@ const PropertyInfo qdev_prop_ssidsize_mode = {
     .set_default_value = qdev_propinfo_set_default_value_enum,
 };
 
+/* --- OasMode --- */
+
+QEMU_BUILD_BUG_ON(sizeof(OasMode) != sizeof(int));
+
+const PropertyInfo qdev_prop_oas_mode = {
+    .type = "OasMode",
+    .description = "oas mode: auto, 32, 36, 40, 42, 44, 48, 52, 56",
+    .enum_table = &OasMode_lookup,
+    .get = qdev_propinfo_get_enum,
+    .set = qdev_propinfo_set_enum,
+    .set_default_value = qdev_propinfo_set_default_value_enum,
+};
+
 /* --- Reserved Region --- */
 
 /*
diff --git a/include/hw/qdev-properties-system.h b/include/hw/qdev-properties-system.h
index 7f9bcf59f2..153803c34a 100644
--- a/include/hw/qdev-properties-system.h
+++ b/include/hw/qdev-properties-system.h
@@ -14,6 +14,7 @@ extern const PropertyInfo qdev_prop_mig_mode;
 extern const PropertyInfo qdev_prop_granule_mode;
 extern const PropertyInfo qdev_prop_zero_page_detection;
 extern const PropertyInfo qdev_prop_ssidsize_mode;
+extern const PropertyInfo qdev_prop_oas_mode;
 extern const PropertyInfo qdev_prop_losttickpolicy;
 extern const PropertyInfo qdev_prop_blockdev_on_error;
 extern const PropertyInfo qdev_prop_bios_chs_trans;
@@ -63,6 +64,8 @@ extern const PropertyInfo qdev_prop_virtio_gpu_output_list;
                        ZeroPageDetection)
 #define DEFINE_PROP_SSIDSIZE_MODE(_n, _s, _f, _d) \
     DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_ssidsize_mode, SsidSizeMode)
+#define DEFINE_PROP_OAS_MODE(_n, _s, _f, _d) \
+    DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_oas_mode, OasMode)
 #define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \
     DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_losttickpolicy, \
                         LostTickPolicy)
diff --git a/qapi/misc-arm.json b/qapi/misc-arm.json
index 416b4240e2..4dc66d00e5 100644
--- a/qapi/misc-arm.json
+++ b/qapi/misc-arm.json
@@ -61,3 +61,31 @@
   'data': [ 'auto', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
             '10', '11', '12', '13', '14', '15', '16', '17', '18',
             '19', '20' ] } # order matters, see ssidsize_mode_to_value()
+
+##
+# @OasMode:
+#
+# SMMUv3 Output Address Size configuration mode.
+#
+# @auto: derive from host IOMMU capabilities
+#
+# @32: 32-bit output address size
+#
+# @36: 36-bit output address size
+#
+# @40: 40-bit output address size
+#
+# @42: 42-bit output address size
+#
+# @44: 44-bit output address size
+#
+# @48: 48-bit output address size
+#
+# @52: 52-bit output address size
+#
+# @56: 56-bit output address size
+#
+# Since: 11.0
+##
+{ 'enum': 'OasMode',
+  'data': [ 'auto', '32', '36', '40', '42', '44', '48', '52', '56' ] }
-- 
2.52.0