From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "Rafael J. Wysocki" <rafael@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>,
Elena Reshetova <elena.reshetova@intel.com>,
Jun Nakajima <jun.nakajima@intel.com>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
"Kalra, Ashish" <ashish.kalra@amd.com>,
Sean Christopherson <seanjc@google.com>,
"Huang, Kai" <kai.huang@intel.com>, Baoquan He <bhe@redhat.com>,
kexec@lists.infradead.org, linux-coco@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: [PATCHv6 00/16] x86/tdx: Add kexec support
Date: Tue, 30 Jan 2024 15:55:57 +0200 [thread overview]
Message-ID: <g7jh422ild6c23hjxvf7q2xtygkumbpynz4hcops7nvg5izvpp@r3oyhvssph2o> (raw)
In-Reply-To: <3f44458f-2b4a-4464-a3df-cb791298dafc@redhat.com>
On Tue, Jan 30, 2024 at 02:43:15PM +0100, Paolo Bonzini wrote:
> On 1/24/24 13:55, 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.
>
> Hi Kirill,
>
> I have a very basic question: is there a reason why this series does not
> revert commit cb8eb06d50fc, "x86/virt/tdx: Disable TDX host support when
> kexec is enabled"?
My patchset enables kexec for TDX guest. The commit you refer blocks kexec
for host. TDX host and guest have totally different problems with handling
kexec. Kai looks on how to get host kexec functional.
--
Kiryl Shutsemau / Kirill A. Shutemov
next prev parent reply other threads:[~2024-01-30 14:34 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-24 12:55 [PATCHv6 00/16] x86/tdx: Add kexec support Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 01/16] x86/acpi: Extract ACPI MADT wakeup code into a separate file Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 02/16] x86/apic: Mark acpi_mp_wake_* variables as __ro_after_init Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 03/16] cpu/hotplug: Add support for declaring CPU offlining not supported Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 04/16] cpu/hotplug, x86/acpi: Disable CPU offlining for ACPI MADT wakeup Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 05/16] x86/kexec: Keep CR4.MCE set during kexec for TDX guest Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 06/16] x86/mm: Make x86_platform.guest.enc_status_change_*() return errno Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 07/16] x86/mm: Return correct level from lookup_address() if pte is none Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 08/16] x86/tdx: Account shared memory Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 09/16] x86/mm: Adding callbacks to prepare encrypted memory for kexec Kirill A. Shutemov
2024-01-29 7:22 ` Nikolay Borisov
2024-01-24 12:55 ` [PATCHv6 10/16] x86/tdx: Convert shared memory back to private on kexec Kirill A. Shutemov
2024-01-29 10:24 ` Kalra, Ashish
2024-01-29 10:36 ` Kirill A. Shutemov
2024-01-29 13:09 ` Kalra, Ashish
2024-01-29 13:34 ` Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 11/16] x86/mm: Make e820_end_ram_pfn() cover E820_TYPE_ACPI ranges Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 12/16] x86/acpi: Rename fields in acpi_madt_multiproc_wakeup structure Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 13/16] x86/acpi: Do not attempt to bring up secondary CPUs in kexec case Kirill A. Shutemov
2024-01-24 12:55 ` [PATCHv6 14/16] x86/smp: Add smp_ops.stop_this_cpu() callback Kirill A. Shutemov
2024-01-26 14:08 ` Huang, Kai
2024-01-24 12:55 ` [PATCHv6 15/16] x86/mm: Introduce kernel_ident_mapping_free() Kirill A. Shutemov
2024-01-26 14:10 ` Huang, Kai
2024-01-24 12:55 ` [PATCHv6 16/16] x86/acpi: Add support for CPU offlining for ACPI MADT wakeup method Kirill A. Shutemov
2024-01-26 14:21 ` Huang, Kai
2024-01-27 18:15 ` kirill.shutemov
2024-01-26 20:03 ` Kuppuswamy Sathyanarayanan
2024-01-27 19:35 ` Kirill A. Shutemov
2024-01-30 13:43 ` [PATCHv6 00/16] x86/tdx: Add kexec support Paolo Bonzini
2024-01-30 13:55 ` Kirill A. Shutemov [this message]
2024-01-30 14:59 ` Paolo Bonzini
2024-01-30 15:15 ` Kirill A. Shutemov
2024-01-30 14:04 ` Huang, Kai
2024-01-31 7:31 ` Nikolay Borisov
2024-01-31 12:47 ` Baoquan He
2024-01-31 12:58 ` Nikolay Borisov
2024-01-31 13:07 ` Huang, Kai
2024-01-31 15:23 ` Baoquan He
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