CXL Event records inform the OS of various CXL device events. Thus far CXL memory devices are emulated and therefore don't naturally generate events.
Add an event infrastructure and mock event injection. Previous versions included a bulk insertion of lots of events. However, this series focuses on providing the ability to inject individual events through QMP. Only the General Media Event is included in this series as an example. Other events can be added pretty easily once the infrastructure is acceptable. In addition, this version updates the code to be in line with the specification based on discussions around the kernel patches. This series is based on Jonathan's CXL branch here: https://gitlab.com/jic23/qemu/-/tree/cxl-2022-11-17 Kernel code found here: https://lore.kernel.org/all/20221212070627.1372402-1-ira.we...@intel.com/ Previous RFC (V1) version: https://lore.kernel.org/linux-cxl/20221010222944.3923556-1-ira.we...@intel.com/ Instructions: Add qmp option to qemu: <host> $ qemu-system-x86_64 ... -qmp unix:/tmp/run_qemu_qmp_0,server,nowait ... OR <host> $ run_qemu.sh ... --qmp ... Enable tracing of events within the guest: <guest> $ echo "" > /sys/kernel/tracing/trace <guest> $ echo 1 > /sys/kernel/tracing/events/cxl/enable <guest> $ echo 1 > /sys/kernel/tracing/tracing_on OPTIONAL: set up ndctl to monitor for events (events will show up as they are injected) <guest> $ <path to ndctl>/cxl monitor Trigger event generation and interrupts in the host: <host> $ qmpcmd="${qemusrcdir}/build/scripts/qmp/qmp-shell /tmp/run_qemu_qmp_0" <host> $ echo "cxl-inject-gen-media-event path=cxl-dev0 log=0 flags=1 \ physaddr=1000 descriptor=127 type=3 transactiontype=192 \ channel=3 rank=-1 device=5 componentid='Iras mem'" | $qmpcmd <Repeat for more events with different values> View events on the guest: <guest> $ cat /sys/kernel/tracing/trace To: Jonathan Cameron <jonathan.came...@huawei.com> Cc: Michael Tsirkin <m...@redhat.com> Cc: Ben Widawsky <bwida...@kernel.org> Cc: Ira Weiny <ira.we...@intel.com> Cc: qemu-devel@nongnu.org Cc: linux-...@vger.kernel.org Signed-off-by: Ira Weiny <ira.we...@intel.com> --- Ira Weiny (8): qemu/bswap: Add const_le64() qemu/uuid: Add UUID static initializer hw/cxl/mailbox: Use new UUID network order define for cel_uuid hw/cxl/events: Add event status register hw/cxl/events: Wire up get/clear event mailbox commands hw/cxl/events: Add event interrupt support bswap: Add the ability to store to an unaligned 24 bit field hw/cxl/events: Add in inject general media event hw/cxl/cxl-device-utils.c | 54 ++++++++-- hw/cxl/cxl-events.c | 252 ++++++++++++++++++++++++++++++++++++++++++++ hw/cxl/cxl-mailbox-utils.c | 160 ++++++++++++++++++++++------ hw/cxl/meson.build | 1 + hw/mem/cxl_type3.c | 96 ++++++++++++++++- hw/mem/cxl_type3_stubs.c | 8 ++ include/hw/cxl/cxl_device.h | 56 +++++++++- include/hw/cxl/cxl_events.h | 126 ++++++++++++++++++++++ include/qemu/bswap.h | 40 +++++++ include/qemu/uuid.h | 12 +++ qapi/cxl.json | 25 +++++ 11 files changed, 785 insertions(+), 45 deletions(-) --- base-commit: 1b4133103d20fc3fea05c7ceca4a242468a5179d change-id: 20221221-ira-cxl-events-2022-11-17-fef53f9b9ac2 Best regards, -- Ira Weiny <ira.we...@intel.com>