[PATCH 20/29] qemu_capabilities: Introduce QEMU_CAPS_DEVICE_UEFI_VARS

29 Dec 2025

This capability indicates the availability of the uefi-vars
device.

The actual name of the QEMU device varies slightly depending on
the architecture: it's uefi-vars-x64 on x86_64, uefi-vars-sysbus
on other UEFI architectures (aarch64, riscv64, loongarch64).

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
---
 src/qemu/qemu_capabilities.c                               | 3 +++
 src/qemu/qemu_capabilities.h                               | 1 +
 tests/qemucapabilitiesdata/caps_10.0.0_aarch64.xml         | 1 +
 tests/qemucapabilitiesdata/caps_10.0.0_x86_64+amdsev.xml   | 1 +
 tests/qemucapabilitiesdata/caps_10.0.0_x86_64.xml          | 1 +
 tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml           | 1 +
 tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml | 1 +
 tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml          | 1 +
 tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml     | 1 +
 tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml          | 1 +
 10 files changed, 12 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 92b863a826..0d02032401 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -755,6 +755,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
               "disk-timed-stats", /* QEMU_CAPS_DISK_TIMED_STATS */
               "query-accelerators", /* QEMU_CAPS_QUERY_ACCELERATORS */
               "mshv", /* QEMU_CAPS_MSHV */
+              "uefi-vars", /* QEMU_CAPS_DEVICE_UEFI_VARS */
     );
 
 
@@ -1462,6 +1463,8 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
     { "tpm-emulator", QEMU_CAPS_DEVICE_TPM_EMULATOR },
     { "tpm-passthrough", QEMU_CAPS_DEVICE_TPM_PASSTHROUGH },
     { "acpi-generic-initiator", QEMU_CAPS_ACPI_GENERIC_INITIATOR },
+    { "uefi-vars-x64", QEMU_CAPS_DEVICE_UEFI_VARS },
+    { "uefi-vars-sysbus", QEMU_CAPS_DEVICE_UEFI_VARS },
 };
 
 
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index f180844e66..25e7fe68ca 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -730,6 +730,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
     QEMU_CAPS_DISK_TIMED_STATS, /* timed stats support ('stats-intervals' property of disk frontends) */
     QEMU_CAPS_QUERY_ACCELERATORS, /* query-accelerators command */
     QEMU_CAPS_MSHV, /* -accel mshv */
+    QEMU_CAPS_DEVICE_UEFI_VARS, /* -device uefi-vars-{x64,sysbus} */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_10.0.0_aarch64.xml b/tests/qemucapabilitiesdata/caps_10.0.0_aarch64.xml
index 90e8d868cc..a8ed9bf357 100644
--- a/tests/qemucapabilitiesdata/caps_10.0.0_aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_10.0.0_aarch64.xml
@@ -163,6 +163,7 @@
   <flag name='nvme-ns'/>
   <flag name='usb-bot'/>
   <flag name='acpi-generic-initiator'/>
+  <flag name='uefi-vars'/>
   <version>10000000</version>
   <microcodeVersion>61700285</microcodeVersion>
   <package>v10.0.0</package>
diff --git a/tests/qemucapabilitiesdata/caps_10.0.0_x86_64+amdsev.xml b/tests/qemucapabilitiesdata/caps_10.0.0_x86_64+amdsev.xml
index cfce1c963d..fa3b480249 100644
--- a/tests/qemucapabilitiesdata/caps_10.0.0_x86_64+amdsev.xml
+++ b/tests/qemucapabilitiesdata/caps_10.0.0_x86_64+amdsev.xml
@@ -209,6 +209,7 @@
   <flag name='amd-iommu'/>
   <flag name='usb-bot'/>
   <flag name='acpi-generic-initiator'/>
+  <flag name='uefi-vars'/>
   <version>10000000</version>
   <microcodeVersion>43100285</microcodeVersion>
   <package>v10.0.0</package>
diff --git a/tests/qemucapabilitiesdata/caps_10.0.0_x86_64.xml b/tests/qemucapabilitiesdata/caps_10.0.0_x86_64.xml
index f94c8388d6..922a38135b 100644
--- a/tests/qemucapabilitiesdata/caps_10.0.0_x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_10.0.0_x86_64.xml
@@ -209,6 +209,7 @@
   <flag name='amd-iommu.pci-id'/>
   <flag name='usb-bot'/>
   <flag name='acpi-generic-initiator'/>
+  <flag name='uefi-vars'/>
   <version>10000000</version>
   <microcodeVersion>43100285</microcodeVersion>
   <package>v10.0.0</package>
diff --git a/tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml b/tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml
index 8d59566cc0..1598b5c08a 100644
--- a/tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_10.1.0_s390x.xml
@@ -140,6 +140,7 @@
   <flag name='nvme-ns'/>
   <flag name='usb-bot'/>
   <flag name='qom-list-get'/>
+  <flag name='uefi-vars'/>
   <version>10001000</version>
   <microcodeVersion>39100286</microcodeVersion>
   <package>v10.1.0</package>
diff --git a/tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml b/tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml
index 8e989a139f..d7951adfb9 100644
--- a/tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml
+++ b/tests/qemucapabilitiesdata/caps_10.1.0_x86_64+inteltdx.xml
@@ -191,6 +191,7 @@
   <flag name='usb-bot'/>
   <flag name='tdx-guest'/>
   <flag name='acpi-generic-initiator'/>
+  <flag name='uefi-vars'/>
   <version>10000050</version>
   <microcodeVersion>43100286</microcodeVersion>
   <package>v10.0.0-1724-gf9a3def17b</package>
diff --git a/tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml b/tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml
index 520a3d8ee8..0e407a9e3a 100644
--- a/tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_10.1.0_x86_64.xml
@@ -214,6 +214,7 @@
   <flag name='tdx-guest'/>
   <flag name='qom-list-get'/>
   <flag name='acpi-generic-initiator'/>
+  <flag name='uefi-vars'/>
   <version>10001000</version>
   <microcodeVersion>43100286</microcodeVersion>
   <package>v10.1.0</package>
diff --git a/tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml b/tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml
index 874fd7bddb..fe3ab5e5f8 100644
--- a/tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml
+++ b/tests/qemucapabilitiesdata/caps_10.2.0_x86_64+mshv.xml
@@ -201,6 +201,7 @@
   <flag name='acpi-generic-initiator'/>
   <flag name='query-accelerators'/>
   <flag name='mshv'/>
+  <flag name='uefi-vars'/>
   <version>10001050</version>
   <microcodeVersion>43100287</microcodeVersion>
   <package>v10.1.0-1778-ge090e0312d</package>
diff --git a/tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml b/tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml
index 7cff2c2291..2346bb4bbe 100644
--- a/tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_10.2.0_x86_64.xml
@@ -215,6 +215,7 @@
   <flag name='acpi-generic-initiator'/>
   <flag name='disk-timed-stats'/>
   <flag name='query-accelerators'/>
+  <flag name='uefi-vars'/>
   <version>10001091</version>
   <microcodeVersion>43100287</microcodeVersion>
   <package>v10.2.0-rc1-38-gfb241d0a1f</package>
-- 
2.52.0

    