Re: [PATCH 4/7] x86/kexec: Disable kexec/kdump on platforms with TDX partial write erratum

[Dave Hansen]

On 9/29/25 18:38, Vishal Annapurve wrote:
>> On those platforms, the old kernel must reset TDX private memory before
>> jumping to the new kernel, otherwise the new kernel may see unexpected
>> machine check.  Currently the kernel doesn't track which page is a TDX
>> private page.  For simplicity just fail kexec/kdump for those platforms.
> Google has a usecase that needs host kdump support on SPR/EMR
> platforms. Disabling kdump disables the host's ability to dump very
> critical information on host crashes altogether. Is Intel working on
> enabling kdump support for platforms with the erratum?

Nope.

Any workarounds are going to be slow and probably imperfect. That's not
a great match for kdump. I'm perfectly happy waiting for fixed hardware
from what I've seen.