The current code assumes that a stateless firmware has to be
explicitly requested by the user, and should never be picked
otherwise. This means that, for example, domains configured to
use SEV-SNP are forced to explicitly request for the firmware
to be stateless.

Additionally, we assume that only split firmware is suitable
for the stateful use case, whereas a combined firmware image
would also do the job.

As a result of these changes, the failing SEV-SNP test case
that was added recently passes, and so do the test cases
requesting read/write firmware.

Signed-off-by: Andrea Bolognani <abolo...@redhat.com>
---
 src/qemu/qemu_firmware.c                      | 32 ++++++++++------
 ...ware-auto-efi-rw-pflash.x86_64-latest.args | 36 ++++++++++++++++++
 ...mware-auto-efi-rw-pflash.x86_64-latest.err |  1 -
 ...mware-auto-efi-rw-pflash.x86_64-latest.xml |  6 ++-
 .../firmware-auto-efi-rw.x86_64-latest.args   | 36 ++++++++++++++++++
 .../firmware-auto-efi-rw.x86_64-latest.err    |  1 -
 .../firmware-auto-efi-rw.x86_64-latest.xml    |  6 ++-
 ...auto-efi-sev-snp.x86_64-latest+amdsev.args | 37 +++++++++++++++++++
 ...-auto-efi-sev-snp.x86_64-latest+amdsev.err |  1 -
 ...-auto-efi-sev-snp.x86_64-latest+amdsev.xml |  6 ++-
 tests/qemuxmlconftest.c                       |  5 +--
 11 files changed, 147 insertions(+), 20 deletions(-)
 create mode 100644 
tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.args
 delete mode 100644 
tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.err
 create mode 100644 
tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.args
 delete mode 100644 tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.err
 create mode 100644 
tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.args
 delete mode 100644 
tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.err

diff --git a/src/qemu/qemu_firmware.c b/src/qemu/qemu_firmware.c
index f10137144e..22e0eb83f0 100644
--- a/src/qemu/qemu_firmware.c
+++ b/src/qemu/qemu_firmware.c
@@ -1300,16 +1300,21 @@ qemuFirmwareMatchDomain(const virDomainDef *def,
             return false;
         }
 
-        if (loader && loader->stateless == VIR_TRISTATE_BOOL_YES) {
-            if (flash->mode != QEMU_FIRMWARE_FLASH_MODE_STATELESS) {
-                VIR_DEBUG("Discarding loader without stateless flash");
-                return false;
-            }
-        } else {
-            if (flash->mode != QEMU_FIRMWARE_FLASH_MODE_SPLIT) {
-                VIR_DEBUG("Discarding loader without split flash");
-                return false;
-            }
+        /* Explicit requests for either a stateless or stateful
+         * firmware should be fulfilled, but if no preference is
+         * provided either one is fine as long as the other match
+         * criteria are satisfied */
+        if (loader &&
+            loader->stateless == VIR_TRISTATE_BOOL_YES &&
+            flash->mode != QEMU_FIRMWARE_FLASH_MODE_STATELESS) {
+            VIR_DEBUG("Discarding loader without stateless flash");
+            return false;
+        }
+        if (loader &&
+            loader->stateless == VIR_TRISTATE_BOOL_NO &&
+            flash->mode == QEMU_FIRMWARE_FLASH_MODE_STATELESS) {
+            VIR_DEBUG("Discarding loader with stateless flash");
+            return false;
         }
 
         if (loader &&
@@ -1424,9 +1429,14 @@ qemuFirmwareEnableFeaturesModern(virDomainDef *def,
         loader = def->os.loader;
 
         loader->type = VIR_DOMAIN_LOADER_TYPE_PFLASH;
-        loader->readonly = VIR_TRISTATE_BOOL_YES;
         loader->format = format;
 
+        /* Combined mode implies read/write, other modes imply read-only */
+        if (flash->mode == QEMU_FIRMWARE_FLASH_MODE_COMBINED)
+            loader->readonly = VIR_TRISTATE_BOOL_NO;
+        else
+            loader->readonly = VIR_TRISTATE_BOOL_YES;
+
         VIR_FREE(loader->path);
         loader->path = g_strdup(flash->executable.filename);
 
diff --git 
a/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.args 
b/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.args
new file mode 100644
index 0000000000..d06de24db8
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.args
@@ -0,0 +1,36 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-guest \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=guest,debug-threads=on \
+-S \
+-object 
'{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/master-key.aes"}'
 \
+-blockdev 
'{"driver":"file","filename":"/usr/share/edk2/ovmf/OVMF.combined.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}'
 \
+-blockdev 
'{"node-name":"libvirt-pflash0-format","read-only":false,"driver":"raw","file":"libvirt-pflash0-storage"}'
 \
+-machine 
pc-q35-10.0,usb=off,smm=on,dump-guest-core=off,memory-backend=pc.ram,pflash0=libvirt-pflash0-format,acpi=on
 \
+-accel kvm \
+-cpu qemu64 \
+-global driver=cfi.pflash01,property=secure,value=on \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-global ICH9-LPC.noreboot=off \
+-watchdog-action reset \
+-sandbox 
on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git 
a/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.err 
b/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.err
deleted file mode 100644
index 3edb2b3451..0000000000
--- a/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.err
+++ /dev/null
@@ -1 +0,0 @@
-operation failed: Unable to find 'efi' firmware that is compatible with the 
current configuration
diff --git 
a/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.xml 
b/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.xml
index 217c1f4b94..7b79738d98 100644
--- a/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.xml
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-rw-pflash.x86_64-latest.xml
@@ -6,11 +6,15 @@
   <vcpu placement='static'>1</vcpu>
   <os firmware='efi'>
     <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
-    <loader readonly='no' type='pflash' format='raw'/>
+    <firmware>
+      <feature enabled='yes' name='secure-boot'/>
+    </firmware>
+    <loader readonly='no' secure='yes' type='pflash' 
format='raw'>/usr/share/edk2/ovmf/OVMF.combined.fd</loader>
     <boot dev='hd'/>
   </os>
   <features>
     <acpi/>
+    <smm state='on'/>
   </features>
   <cpu mode='custom' match='exact' check='none'>
     <model fallback='forbid'>qemu64</model>
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.args 
b/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.args
new file mode 100644
index 0000000000..d06de24db8
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.args
@@ -0,0 +1,36 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-guest \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=guest,debug-threads=on \
+-S \
+-object 
'{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/master-key.aes"}'
 \
+-blockdev 
'{"driver":"file","filename":"/usr/share/edk2/ovmf/OVMF.combined.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}'
 \
+-blockdev 
'{"node-name":"libvirt-pflash0-format","read-only":false,"driver":"raw","file":"libvirt-pflash0-storage"}'
 \
+-machine 
pc-q35-10.0,usb=off,smm=on,dump-guest-core=off,memory-backend=pc.ram,pflash0=libvirt-pflash0-format,acpi=on
 \
+-accel kvm \
+-cpu qemu64 \
+-global driver=cfi.pflash01,property=secure,value=on \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-global ICH9-LPC.noreboot=off \
+-watchdog-action reset \
+-sandbox 
on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.err 
b/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.err
deleted file mode 100644
index 3edb2b3451..0000000000
--- a/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.err
+++ /dev/null
@@ -1 +0,0 @@
-operation failed: Unable to find 'efi' firmware that is compatible with the 
current configuration
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.xml 
b/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.xml
index 0f6b965067..7b79738d98 100644
--- a/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.xml
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-rw.x86_64-latest.xml
@@ -6,11 +6,15 @@
   <vcpu placement='static'>1</vcpu>
   <os firmware='efi'>
     <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
-    <loader readonly='no' format='raw'/>
+    <firmware>
+      <feature enabled='yes' name='secure-boot'/>
+    </firmware>
+    <loader readonly='no' secure='yes' type='pflash' 
format='raw'>/usr/share/edk2/ovmf/OVMF.combined.fd</loader>
     <boot dev='hd'/>
   </os>
   <features>
     <acpi/>
+    <smm state='on'/>
   </features>
   <cpu mode='custom' match='exact' check='none'>
     <model fallback='forbid'>qemu64</model>
diff --git 
a/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.args 
b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.args
new file mode 100644
index 0000000000..ab8fed6593
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.args
@@ -0,0 +1,37 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-guest \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=guest,debug-threads=on \
+-S \
+-object 
'{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/master-key.aes"}'
 \
+-blockdev 
'{"driver":"file","filename":"/usr/share/edk2/ovmf/OVMF.amdsev.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}'
 \
+-blockdev 
'{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}'
 \
+-blockdev 
'{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/guest_VARS.fd","node-name":"libvirt-pflash1-storage","read-only":false}'
 \
+-machine 
pc-q35-10.0,usb=off,dump-guest-core=off,memory-backend=pc.ram,confidential-guest-support=lsec0,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-storage,acpi=on
 \
+-accel kvm \
+-cpu qemu64 \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-global ICH9-LPC.noreboot=off \
+-watchdog-action reset \
+-object 
'{"qom-type":"sev-snp-guest","id":"lsec0","cbitpos":51,"reduced-phys-bits":1,"policy":196608}'
 \
+-sandbox 
on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git 
a/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.err 
b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.err
deleted file mode 100644
index 3edb2b3451..0000000000
--- a/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.err
+++ /dev/null
@@ -1 +0,0 @@
-operation failed: Unable to find 'efi' firmware that is compatible with the 
current configuration
diff --git 
a/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.xml 
b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.xml
index 81ac7888ea..1cc08ff4fd 100644
--- a/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.xml
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.xml
@@ -6,7 +6,11 @@
   <vcpu placement='static'>1</vcpu>
   <os firmware='efi'>
     <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
-    <loader format='raw'/>
+    <firmware>
+      <feature enabled='no' name='secure-boot'/>
+    </firmware>
+    <loader readonly='yes' type='pflash' 
format='raw'>/usr/share/edk2/ovmf/OVMF.amdsev.fd</loader>
+    <nvram format='raw'>/var/lib/libvirt/qemu/nvram/guest_VARS.fd</nvram>
     <boot dev='hd'/>
   </os>
   <features>
diff --git a/tests/qemuxmlconftest.c b/tests/qemuxmlconftest.c
index 272d314195..2d048746ea 100644
--- a/tests/qemuxmlconftest.c
+++ b/tests/qemuxmlconftest.c
@@ -1443,8 +1443,8 @@ mymain(void)
     DO_TEST_CAPS_LATEST("firmware-auto-efi");
     DO_TEST_CAPS_LATEST_ABI_UPDATE("firmware-auto-efi");
     DO_TEST_CAPS_LATEST("firmware-auto-efi-stateless");
-    DO_TEST_CAPS_LATEST_FAILURE("firmware-auto-efi-rw");
-    DO_TEST_CAPS_LATEST_FAILURE("firmware-auto-efi-rw-pflash");
+    DO_TEST_CAPS_LATEST("firmware-auto-efi-rw");
+    DO_TEST_CAPS_LATEST("firmware-auto-efi-rw-pflash");
     DO_TEST_CAPS_LATEST("firmware-auto-efi-loader-secure");
     DO_TEST_CAPS_LATEST_ABI_UPDATE("firmware-auto-efi-loader-secure");
     DO_TEST_CAPS_LATEST("firmware-auto-efi-loader-insecure");
@@ -1478,7 +1478,6 @@ mymain(void)
     DO_TEST_CAPS_LATEST("firmware-auto-efi-format-mismatch");
 
     DO_TEST_CAPS_ARCH_LATEST_FULL("firmware-auto-efi-sev-snp", "x86_64",
-                                  ARG_FLAGS, FLAG_EXPECT_FAILURE,
                                   ARG_CAPS_VARIANT, "+amdsev",
                                   ARG_END);
 
-- 
2.50.1

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