We discovered that the kdump crashkernel would not work with our SEV- SNP configuration. After reading the device table from the previour kernel we would see a lot of AMD-Vi: Completion-Wait loop timed out errors and finally crash: Kernel panic - not syncing: timer doesn't work through Interrupt- remapped IO-APIC We found that disabeling SNP in the outgoing (crashing) kernel would enable the crashkernel to take over the iommu config and boot from there. We opened a PR over on github against the rfc-v9 branch to discuss the issue: https://github.com/AMDESE/linux/pull/5 Cheers Johanna Amazon Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B Sitz: Berlin Ust-ID: DE 289 237 879
