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([2001:8003:7475:6e00:1e1e:4135:2440:ee05]) by smtp.gmail.com with ESMTPSA id j19-20020a62b613000000b00640f51801e6sm371313pff.159.2023.06.19.21.13.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 19 Jun 2023 21:13:32 -0700 (PDT) Message-ID: <766a1dc4-a5ad-725a-b25e-438bf1387a4f@redhat.com> Date: Tue, 20 Jun 2023 14:13:22 +1000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.1 Subject: Re: [kvm-unit-tests PATCH v3] runtime: Allow to specify properties for accelerator Content-Language: en-US To: Andrew Jones Cc: kvmarm@lists.linux.dev, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, linux-s390@vger.kernel.org, lvivier@redhat.com, thuth@redhat.com, frankja@linux.ibm.com, imbrenda@linux.ibm.com, david@redhat.com, pbonzini@redhat.com, nrb@linux.ibm.com, shan.gavin@gmail.com References: <20230615062148.19883-1-gshan@redhat.com> <20230619-339675e424da033000049f83@orel> From: Gavin Shan In-Reply-To: <20230619-339675e424da033000049f83@orel> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Hi Drew, On 6/19/23 18:45, Andrew Jones wrote: > On Thu, Jun 15, 2023 at 04:21:48PM +1000, Gavin Shan wrote: >> There are extra properties for accelerators to enable the specific >> features. For example, the dirty ring for KVM accelerator can be >> enabled by "-accel kvm,dirty-ring-size=65536". Unfortuntely, the >> extra properties for the accelerators aren't supported. It makes >> it's impossible to test the combination of KVM and dirty ring >> as the following error message indicates. >> >> # cd /home/gavin/sandbox/kvm-unit-tests/tests >> # QEMU=/home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \ >> ACCEL=kvm,dirty-ring-size=65536 ./its-migration >> : >> BUILD_HEAD=2fffb37e >> timeout -k 1s --foreground 90s /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \ >> -nodefaults -machine virt -accel kvm,dirty-ring-size=65536 -cpu cortex-a57 \ >> -device virtio-serial-device -device virtconsole,chardev=ctd -chardev testdev,id=ctd \ >> -device pci-testdev -display none -serial stdio -kernel _NO_FILE_4Uhere_ -smp 160 \ >> -machine gic-version=3 -append its-pending-migration # -initrd /tmp/tmp.gfDLa1EtWk >> qemu-system-aarch64: kvm_init_vcpu: kvm_arch_init_vcpu failed (0): Invalid argument >> >> Allow to specify extra properties for accelerators. With this, the >> "its-migration" can be tested for the combination of KVM and dirty >> ring. >> >> Signed-off-by: Gavin Shan >> --- >> v3: Split $ACCEL to $ACCEL and $ACCEL_PROPS in get_qemu_accelerator() >> and don't print them as output, suggested by Drew. >> --- >> arm/run | 12 ++++-------- >> powerpc/run | 5 ++--- >> s390x/run | 5 ++--- >> scripts/arch-run.bash | 21 +++++++++++++-------- >> x86/run | 5 ++--- >> 5 files changed, 23 insertions(+), 25 deletions(-) >> >> diff --git a/arm/run b/arm/run >> index c6f25b8..d9ebe59 100755 >> --- a/arm/run >> +++ b/arm/run >> @@ -10,10 +10,8 @@ if [ -z "$KUT_STANDALONE" ]; then >> fi >> processor="$PROCESSOR" >> >> -accel=$(get_qemu_accelerator) || >> - exit $? >> - >> -if [ "$accel" = "kvm" ]; then >> +get_qemu_accelerator || exit $? >> +if [ "$ACCEL" = "kvm" ]; then >> QEMU_ARCH=$HOST >> fi >> >> @@ -23,11 +21,9 @@ qemu=$(search_qemu_binary) || >> if [ "$QEMU" ] && [ -z "$ACCEL" ] && >> [ "$HOST" = "aarch64" ] && [ "$ARCH" = "arm" ] && >> [ "$(basename $QEMU)" = "qemu-system-arm" ]; then >> - accel=tcg >> + ACCEL="tcg" >> fi >> > > As I pointed out in the v2 review we can't just s/accel/ACCEL/ without > other changes. Now ACCEL will also be set when the above condition > is checked, making it useless. Please ensure the test case that commit > c7d6c7f00e7c ("arm/run: Use TCG with qemu-system-arm on arm64 systems") > fixed still works with your patch. > Sorry that I missed your comments for v2. In order to make the test case in c7d6c7f00e7c working, we just need to call set_qemu_accelerator() after the chunk of code, like below. When $ACCEL is set to "tcg" by the conditional code, it won't be changed in the following set_qemu_accelerator(). Could you Please confirm if it looks good to you so that I can integrate the changes to v4 and post it. arm/run -------- processor="$PROCESSOR" if [ "$QEMU" ] && [ -z "$ACCEL" ] && [ "$HOST" = "aarch64" ] && [ "$ARCH" = "arm" ] && [ "$(basename $QEMU)" = "qemu-system-arm" ]; then ACCEL="tcg" fi set_qemu_accelerator || exit $? if [ "$ACCEL" = "kvm" ]; then QEMU_ARCH=$HOST fi Thanks, Gavin