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[0/2] QEMU DCD emulation support fix

Message ID 20240827164304.88876-1-nifan.cxl@gmail.com (mailing list archive)
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Series QEMU DCD emulation support fix | expand

Message

Fan Ni Aug. 27, 2024, 4:40 p.m. UTC 
From: Fan Ni <fan.ni@samsung.com>

In Ira's latest DCD kernel patchset[1], the More flag support has been
added. While testing it with mainstream Qemu, I identified two issues
with Qemu.

1. For a DC extent add request with more than one extents, the More flag
for the last one is not correctly set.
2. The function cxl_event_insert should only return true for the last event
record in a sequence grouped via More flag so interrupt will only be
triggered once for the sequence not every record.

After the fix of the first issue, the More flag works as expected.
While the test can pass without the second patch which fixes the second issue,
but I think we make sense to notify the OS only when all the records
are put in the event log.

[1] Last DCD kernel patchset: https://lore.kernel.org/linux-cxl/20240816-dcd-type2-upstream-v3-0-7c9b96cba6d7@intel.com/T/#t

Fan Ni (2):
  hw/mem/cxl_type3: Fix More flag setting for dynamic capacity event
    records
  hw/cxl/cxl_event: Fix interrupt triggering for dynamic capacity events
    grouped via More flag

 hw/cxl/cxl-events.c         | 8 ++++++++
 hw/mem/cxl_type3.c          | 2 +-
 include/hw/cxl/cxl_events.h | 1 +
 3 files changed, 10 insertions(+), 1 deletion(-)