Inspired by a patch by Alex Bennée. This version uses a new
unittests.cfg variable and includes support for DRYRUN.

Signed-off-by: Andrew Jones <drjo...@redhat.com>
---
 arm/run                 | 43 +++++++++++++++++++++++++++++++++++++------
 arm/unittests.cfg       |  4 +++-
 run_tests.sh            |  3 ++-
 scripts/functions.bash  |  8 ++++++--
 scripts/mkstandalone.sh | 15 +++++++++++----
 5 files changed, 59 insertions(+), 14 deletions(-)

diff --git a/arm/run b/arm/run
index 8cc2fa2571967..4a648697d7fb5 100755
--- a/arm/run
+++ b/arm/run
@@ -7,6 +7,42 @@ fi
 source config.mak
 processor="$PROCESSOR"
 
+if [ -c /dev/kvm ]; then
+       if [ "$HOST" = "arm" ] && [ "$ARCH" = "arm" ]; then
+               kvm_available=yes
+       elif [ "$HOST" = "aarch64" ]; then
+               kvm_available=yes
+       fi
+fi
+
+if [ "$ACCEL" = "kvm" ] && [ "$kvm_available" != "yes" ] &&
+               [ "$DRYRUN" != "yes" ]; then
+       printf "skip $TESTNAME (kvm only)\n\n"
+       exit 2
+fi
+
+if [ -z "$ACCEL" ]; then
+       if [ "$DRYRUN" = "yes" ]; then
+               # Output kvm with tcg fallback for dryrun (when both are
+               # allowed), since the command line we output may get used
+               # elsewhere.
+               ACCEL="kvm:tcg"
+       elif [ "$kvm_available" = "yes" ]; then
+               ACCEL="kvm"
+       else
+               ACCEL="tcg"
+       fi
+fi
+
+if [ "$ARCH" = "arm64" ]; then
+       if [[ $ACCEL =~ kvm ]]; then
+               # arm64 must use '-cpu host' with kvm, and we can't use
+               # '-cpu host' with tcg, so we force kvm-only (no fallback)
+               ACCEL="kvm"
+               processor="host"
+       fi
+fi
+
 qemu="${QEMU:-qemu-system-$ARCH_NAME}"
 qpath=$(which $qemu 2>/dev/null)
 
@@ -33,15 +69,10 @@ if $qemu $M -chardev testdev,id=id -initrd . 2>&1 \
        exit 2
 fi
 
-M='-machine virt,accel=kvm:tcg'
 chr_testdev='-device virtio-serial-device'
 chr_testdev+=' -device virtconsole,chardev=ctd -chardev testdev,id=ctd'
 
-# arm64 must use '-cpu host' with kvm
-if [ "$(arch)" = "aarch64" ] && [ "$ARCH" = "arm64" ] && [ -c /dev/kvm ]; then
-       processor="host"
-fi
-
+M+=",accel=$ACCEL"
 command="$qemu $M -cpu $processor $chr_testdev"
 command+=" -display none -serial stdio -kernel"
 echo $command "$@"
diff --git a/arm/unittests.cfg b/arm/unittests.cfg
index e068a0cdd9c1f..243c13301811b 100644
--- a/arm/unittests.cfg
+++ b/arm/unittests.cfg
@@ -3,8 +3,10 @@
 # file = foo.flat # Name of the flat file to be used
 # smp  = 2        # Number of processors the VM will use during this test
 # extra_params = -append <params...> # Additional parameters used
-# arch = arm/arm64                   # Only if test case is specific to one
+# arch = arm|arm64                   # Only if test case is specific to one
 # groups = group1 group2 # Used to identify test cases with run_tests -g ...
+# accel = kvm|tcg # Optionally specify if test must run with kvm or tcg.
+#                 # If not specified, then kvm will be used when available.
 
 #
 # Test that the configured number of processors (smp = <num>), and
diff --git a/run_tests.sh b/run_tests.sh
index 80b87823c3358..b1b4c541ecaea 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -20,6 +20,7 @@ function run()
     local opts="$5"
     local arch="$6"
     local check="$7"
+    local accel="$8"
 
     if [ -z "$testname" ]; then
         return
@@ -46,7 +47,7 @@ function run()
         fi
     done
 
-    cmdline="TESTNAME=$testname ./$TEST_DIR-run $kernel -smp $smp $opts"
+    cmdline="TESTNAME=$testname ACCEL=$accel ./$TEST_DIR-run $kernel -smp $smp 
$opts"
     if [ $verbose != 0 ]; then
         echo $cmdline
     fi
diff --git a/scripts/functions.bash b/scripts/functions.bash
index 7ed5a517250bc..f13fe6f88f23d 100644
--- a/scripts/functions.bash
+++ b/scripts/functions.bash
@@ -10,12 +10,13 @@ function for_each_unittest()
        local groups
        local arch
        local check
+       local accel
 
        exec {fd}<"$unittests"
 
        while read -u $fd line; do
                if [[ "$line" =~ ^\[(.*)\]$ ]]; then
-                       "$cmd" "$testname" "$groups" "$smp" "$kernel" "$opts" 
"$arch" "$check"
+                       "$cmd" "$testname" "$groups" "$smp" "$kernel" "$opts" 
"$arch" "$check" "$accel"
                        testname=${BASH_REMATCH[1]}
                        smp=1
                        kernel=""
@@ -23,6 +24,7 @@ function for_each_unittest()
                        groups=""
                        arch=""
                        check=""
+                       accel=""
                elif [[ $line =~ ^file\ *=\ *(.*)$ ]]; then
                        kernel=$TEST_DIR/${BASH_REMATCH[1]}
                elif [[ $line =~ ^smp\ *=\ *(.*)$ ]]; then
@@ -35,8 +37,10 @@ function for_each_unittest()
                        arch=${BASH_REMATCH[1]}
                elif [[ $line =~ ^check\ *=\ *(.*)$ ]]; then
                        check=${BASH_REMATCH[1]}
+               elif [[ $line =~ ^accel\ *=\ *(.*)$ ]]; then
+                       accel=${BASH_REMATCH[1]}
                fi
        done
-       "$cmd" "$testname" "$groups" "$smp" "$kernel" "$opts" "$arch" "$check"
+       "$cmd" "$testname" "$groups" "$smp" "$kernel" "$opts" "$arch" "$check" 
"$accel"
        exec {fd}<&-
 }
diff --git a/scripts/mkstandalone.sh b/scripts/mkstandalone.sh
index 4cf346ab87d24..0c39451e538c9 100755
--- a/scripts/mkstandalone.sh
+++ b/scripts/mkstandalone.sh
@@ -29,6 +29,7 @@ function mkstandalone()
        local opts="$5"
        local arch="$6"
        local check="$7"
+       local accel="$8"
 
        if [ -z "$testname" ]; then
                return 1
@@ -39,7 +40,7 @@ function mkstandalone()
        fi
 
        standalone=tests/$testname
-       cmdline=$(DRYRUN=yes ./$TEST_DIR-run $kernel)
+       cmdline=$(DRYRUN=yes ACCEL=$accel ./$TEST_DIR-run $kernel)
        if [ $? -ne 0 ]; then
                echo $cmdline
                exit 1
@@ -94,10 +95,16 @@ qemu="$qemu"
 if [ "\$QEMU" ]; then
        qemu="\$QEMU"
 fi
-cmdline="\`echo '$cmdline' | sed s%$kernel%\$bin%\`"
 echo \$qemu $cmdline -smp $smp $opts
-\$qemu \$cmdline -smp $smp $opts
-ret=\$?
+
+cmdline="\`echo '$cmdline' | sed s%$kernel%_NO_FILE_4Uhere_%\`"
+if \$qemu \$cmdline 2>&1 | grep 'No accelerator found'; then
+        ret=2
+else
+       cmdline="\`echo '$cmdline' | sed s%$kernel%\$bin%\`"
+       \$qemu \$cmdline -smp $smp $opts
+       ret=\$?
+fi
 echo Return value from qemu: \$ret
 if [ \$ret -le 1 ]; then
        echo PASS $testname 1>&2
-- 
2.4.3

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