This series wraps Dave Jiang's v4 with tests as per v2.
The kernel code using this is now at v10 and reflects the changes made here.
https://lore.kernel.org/linux-cxl/33155160-b627-4d70-b7f7-0fba162183c7@intel.com/T/#t
The discussions around the QEMU patches resulted in significant fixes
to the kernel code - which is great. Thanks to all involved.
Changes since v4:
- Add updated bios table to reflect the changs made in v3/v4
Based-on: qemu/master a51e5124a6
Key thing to note vs V2 is that this now returns a package of integers
and the example returns a package with two elements in it.
This corresponds to a firmware saying that for any input parameters
the QTGs should be used in order of preference 0 then 1.
As per patch 2 description:
Add a simple _DSM call support for the ACPI0017 device to return fake QTG
ID values of 0 and 1 in all cases. This for _DSM plumbing testing from the OS.
Following edited for readability
Device (CXLM)
{
Name (_HID, "ACPI0017") // _HID: Hardware ID
...
Method (_DSM, 4, Serialized) // _DSM: Device-Specific Method
{
If ((Arg0 == ToUUID ("f365f9a6-a7de-4071-a66a-b40c0b4f8e52")))
{
If ((Arg2 == Zero))
{
Return (Buffer (One) { 0x01 })
}
If ((Arg2 == One))
{
Return (Package (0x02)
{
One,
Package (0x02)
{
Zero,
One
}
})
}
}
}
Dave Jiang (1):
hw/cxl: Add QTG _DSM support for ACPI0017 device
Jonathan Cameron (2):
tests/acpi: Allow update of DSDT.cxl
tests/acpi: Update DSDT.cxl with QTG DSM
include/hw/acpi/cxl.h | 1 +
hw/acpi/cxl.c | 69 +++++++++++++++++++++++++++++++++++
hw/i386/acpi-build.c | 1 +
tests/data/acpi/q35/DSDT.cxl | Bin 9655 -> 9713 bytes
4 files changed, 71 insertions(+)
--
2.39.2