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[RFC,edk2-platforms,v2,0/1] add basic support for CXL on sbsa-ref

Message ID 20241105103523.415774-1-wangyuquan1236@phytium.com.cn
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Series add basic support for CXL on sbsa-ref | expand

Message

Yuquan Wang Nov. 5, 2024, 10:35 a.m. UTC 
v1 -> v2:
- PCDs values about CXL exclusive MMIO32 & MMIO64 space
- CXL Bus range: 0xc0 ~ 0xff
- PCIE ecam space & Cxl ecam space
- CEDT format

RFC because
- Many contents are ported from Jonathan' patch on qemu virt design

- Bring plenty of PCDs values and modifying the original PCIE values

- Less experience and not particularly confident in ACPI area

This series leverages Jonathan's patches[1] to add acpi0016 & acpi0017 objects into the
previous DSDT table of sbsa-ref. Since the acpi0016 implementation model on qemu side is
the pxb-cxl, this cxl Bus would share ECAM sapce of PCIE Bus. Thus I divide some space
from Pcie Ecam to support cxl-related values.

To prevent breaking the original pcie mmio space, this adds exclusive mmio32 & mmio64
space for cxl host.

This defines the pcie bus range of cxl host is 0xc0 ~ 0xff, since the pxb-cxl-host as
well as cxl components on it would occupy the original pcie buses, the original pcie
ecam space should divided some range for pxb-cxl-host.

Based on the new CEDT definitions patch on edk2[2], this series adds a static Cedt.aslc to
support the [SBSA_CXL_HOST] & [SBSA_CXL_FIXED_WINDOW] space on sbsa-ref.

Link:
[1]: https://lore.kernel.org/linux-cxl/20220616141950.23374-2-Jonathan.Cameron@huawei.com/
[2]: https://edk2.groups.io/g/devel/topic/rfc_edk2_patch_v3_0_1/109403423#

Yuquan Wang (1):
  SbsaQemu: Support basic CXL enablement

 Platform/Qemu/SbsaQemu/SbsaQemu.dsc           |  23 +-
 .../Qemu/SbsaQemu/AcpiTables/AcpiTables.inf   |  19 +
 Silicon/Qemu/SbsaQemu/AcpiTables/Cedt.aslc    |  69 +++
 Silicon/Qemu/SbsaQemu/AcpiTables/Dsdt.asl     | 401 +++++++++++++++++-
 Silicon/Qemu/SbsaQemu/AcpiTables/Mcfg.aslc    |   2 +-
 Silicon/Qemu/SbsaQemu/SbsaQemu.dec            |  34 +-
 6 files changed, 537 insertions(+), 11 deletions(-)
 create mode 100644 Silicon/Qemu/SbsaQemu/AcpiTables/Cedt.aslc