Commit 5f9b5bd0 authored by Kai Huang's avatar Kai Huang Committed by Dave Hansen
Browse files

x86/virt/tdx: Update the kexec section in the TDX documentation 



TDX host kernel now supports kexec/kdump.  Update the documentation to
reflect that.

Opportunistically, remove the parentheses in "Kexec()" and move this
section under the "Erratum" section because the updated "Kexec" section
now refers to that erratum.

Signed-off-by: default avatarKai Huang <kai.huang@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: default avatarRick Edgecombe <rick.p.edgecombe@intel.com>
Tested-by: default avatarFarrah Chen <farrah.chen@intel.com>
Link: https://lore.kernel.org/all/20250901160930.1785244-7-pbonzini%40redhat.com
parent 80804847

Documentation/arch/x86/tdx.rst

+7 −7
Original line number Diff line number Diff line
@@ -142,13 +142,6 @@ but depends on the BIOS to behave correctly. 
Note TDX works with CPU logical online/offline, thus the kernel still

allows to offline logical CPU and online it again.



Kexec()

~~~~~~~



TDX host support currently lacks the ability to handle kexec.  For

simplicity only one of them can be enabled in the Kconfig.  This will be

fixed in the future.



Erratum

~~~~~~~
@@ -171,6 +164,13 @@ If the platform has such erratum, the kernel prints additional message in 
machine check handler to tell user the machine check may be caused by

kernel bug on TDX private memory.



Kexec

~~~~~~~



Currently kexec doesn't work on the TDX platforms with the aforementioned

erratum.  It fails when loading the kexec kernel image.  Otherwise it

works normally.



Interaction vs S3 and deeper states

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~