On Mon, Oct 10, 2022 at 03:29:38PM -0700, Ira wrote:
> From: Ira Weiny <[email protected]>
>
> CXL Event records inform the OS of various CXL device events. Thus far CXL
> memory devices are emulated and therefore don't naturally have events which
> will occur.
>
> Add mock events and a HMP trigger mechanism to facilitate guest OS testing of
> event support.
>
> This support requires a follow on version of the event patch set. The RFC was
> submitted and discussed here:
>
>
> https://lore.kernel.org/linux-cxl/[email protected]/
>
> I'll post the lore link to the new version shortly.
Kernel support now posted here:
https://lore.kernel.org/all/[email protected]/
Ira
>
> Instructions for running this test.
>
> 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
>
> Trigger event generation and interrupts in the host:
>
> <host> $ echo "cxl_event_inject cxl-devX" | qmp-shell -H
> /tmp/run_qemu_qmp_0
>
> Where X == one of the memory devices; cxl-dev0 should work.
>
> View events on the guest:
>
> <guest> $ cat /sys/kernel/tracing/trace
>
>
> Ira Weiny (6):
> qemu/bswap: Add const_le64()
> qemu/uuid: Add UUID static initializer
> hw/cxl/cxl-events: Add CXL mock events
> hw/cxl/mailbox: Wire up get/clear event mailbox commands
> hw/cxl/cxl-events: Add event interrupt support
> hw/cxl/mailbox: Wire up Get/Set Event Interrupt policy
>
> hmp-commands.hx | 14 ++
> hw/cxl/cxl-device-utils.c | 1 +
> hw/cxl/cxl-events.c | 330 ++++++++++++++++++++++++++++++++++++
> hw/cxl/cxl-host-stubs.c | 5 +
> hw/cxl/cxl-mailbox-utils.c | 224 +++++++++++++++++++++---
> hw/cxl/meson.build | 1 +
> hw/mem/cxl_type3.c | 7 +-
> include/hw/cxl/cxl_device.h | 22 +++
> include/hw/cxl/cxl_events.h | 194 +++++++++++++++++++++
> include/qemu/bswap.h | 10 ++
> include/qemu/uuid.h | 12 ++
> include/sysemu/sysemu.h | 3 +
> 12 files changed, 802 insertions(+), 21 deletions(-)
> create mode 100644 hw/cxl/cxl-events.c
> create mode 100644 include/hw/cxl/cxl_events.h
>
>
> base-commit: 6f7f81898e4437ea544ee4ca24bef7ec543b1f06
> --
> 2.37.2
>
