linux-kernel - Re: [PATCHv8 00/17, CORRECTED] x86/tdx: Add kexec support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZellV+unyyx6C+et@localhost.localdomain>
Date: Thu, 7 Mar 2024 14:57:27 +0800
From: Tao Liu <ltao@...hat.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>,
	Elena Reshetova <elena.reshetova@...el.com>,
	Jun Nakajima <jun.nakajima@...el.com>,
	Rick Edgecombe <rick.p.edgecombe@...el.com>,
	Tom Lendacky <thomas.lendacky@....com>,
	"Kalra, Ashish" <ashish.kalra@....com>,
	Sean Christopherson <seanjc@...gle.com>,
	"Huang, Kai" <kai.huang@...el.com>, Baoquan He <bhe@...hat.com>,
	kexec@...ts.infradead.org, linux-coco@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCHv8 00/17, CORRECTED] x86/tdx: Add kexec support

Hi Kirill,

On Wed, Mar 06, 2024 at 05:02:45PM +0200, Kirill A. Shutemov wrote:
> On Tue, Feb 27, 2024 at 11:24:35PM +0200, Kirill A. Shutemov wrote:
> > The patchset adds bits and pieces to get kexec (and crashkernel) work on
> > TDX guest.
> > 
> > The last patch implements CPU offlining according to the approved ACPI
> > spec change poposal[1]. It unlocks kexec with all CPUs visible in the target
> > kernel. It requires BIOS-side enabling. If it missing we fallback to booting
> > 2nd kernel with single CPU.
> > 
> > Please review. I would be glad for any feedback.
> 
> Thomas, Ingo, Borislav, Dave,
> 
> Any feedback?
> 
> Is there anything else I can do to get the patchset moving?
> 
I tested the patchset with Linux 6.8-rc6, no problem found. With the
patchset, a vmcore can be generated successfully in tdx VM and can be
analyzed by crash utility.

Tested-by: Tao Liu <ltao@...hat.com>

Thanks,
Tao Liu

> -- 
>   Kiryl Shutsemau / Kirill A. Shutemov