Re: [PATCH v6 10/10] arm_mpam: detect and enable MPAM-Fb PCC support
Ben Horgan <[email protected]> Thu, 30 Jul 2026 17:13:21 +0100
| Newsgroups | gmane.linux.kernel,gmane.linux.acpi.devel,gmane.linux.ports.arm.kernel |
|---|---|
| Message-ID | <[email protected]> |
Hi Andre, On 7/30/26 16:25, Andre Przywara wrote: > The Arm MPAM-Fb specification [1] describes a protocol to access MSC > registers through a firmware interface. This requires a shared memory > region to hold the message, and a mailbox to trigger the access. > For ACPI this is wrapped as a PCC channel, described using existing > ACPI abstractions. > > Add code to parse those PCC table descriptions associated with an MSC, > and store the parsed information in the MSC struct. > There can be multiple PCC channels, and each channel can serve multiple > MSCs, so we need to keep track of the channel usage, using a list and > a refcount. > > This will be used by the MPAM-Fb access wrapper code. > > [1] https://developer.arm.com/documentation/den0144/latest > > Signed-off-by: Andre Przywara <[email protected]> > Tested-by: Ritwick Sharma <[email protected]> Ritwick gave his Tested-by for the series on v5. Any reason to just add the tag on this patch? I guess patch 9 has significant enough changes to drop tags but I don't see it for the others. Thanks, Ben