Tj,
I have posted RFCv3 in the BZ
https://bugzilla.kernel.org/show_bug.cgi?id=201753.
RFCv3 patch adds the logic to retry checking after 20msec wait for each retry loop since I have founded that certain
platform takes about 10msec for the power gating to disable.
Please give this a try to see if this works better on your platform.
Thanks,
Suravee
On 2/4/21 1:25 PM, Tj (Elloe Linux) wrote:
On 02/02/2021 05:54, Suravee Suthikulpanit wrote:
Could you please try the attached patch to see if the problem still
persist.
Tested on top of commit 61556703b610 doesn't appear to have solved the
issue.
Linux version 5.11.0-rc6+ (tj@elloe000) (gcc (Ubuntu
9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubunt>
Command line: BOOT_IMAGE=/vmlinuz-5.11.0-rc6+
root=/dev/mapper/ELLOE000-rootfs ro acpi_osi=! "acpi_osi=Windows 20>
...
DMI: LENOVO 20NECTO1WW/20NECTO1WW, BIOS R11ET32W (1.12 ) 12/23/2019
...
AMD-Vi: ivrs, add hid:PNPD0040, uid:, rdevid:152
...
smpboot: CPU0: AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx (family:
0x17, model: 0x18, stepping: 0x1)
...
pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf counter.
pci 0000:00:00.2: can't derive routing for PCI INT A
pci 0000:00:00.2: PCI INT A: not connected
pci 0000:00:01.0: Adding to iommu group 0
pci 0000:00:01.1: Adding to iommu group 1
...
pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40
pci 0000:00:00.2: AMD-Vi: Extended features (0x4f77ef22294ada):
PPR NX GT IA GA PC GA_vAPIC
AMD-Vi: Interrupt remapping enabled
AMD-Vi: Virtual APIC enabled
AMD-Vi: Lazy IO/TLB flushing enabled
amd_uncore: 4 amd_df counters detected
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
