Re: [Xen-devel] [PATCH] x86/kexec: harden kexec path by entering with NMIs latched

2018-07-19 Thread Jan Beulich
>>> On 18.07.18 at 23:38, wrote: > On certain occasions platform might generate NMIs during kexec transition. > It could be cascades of NMIs following the first one, escalated Master > Aborts following IOMMU shutdown on the transition itself, etc. > Purgatory code is now unprepared for any sort of

[Xen-devel] [PATCH] x86/kexec: harden kexec path by entering with NMIs latched

2018-07-18 Thread Igor Druzhinin
On certain occasions platform might generate NMIs during kexec transition. It could be cascades of NMIs following the first one, escalated Master Aborts following IOMMU shutdown on the transition itself, etc. Purgatory code is now unprepared for any sort of exception or interrupt handling including