From: Dave Hansen <dave.hansen@intel.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
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, Tao Liu <ltao@redhat.com>
Subject: Re: [PATCHv10 04/18] cpu/hotplug, x86/acpi: Disable CPU offlining for ACPI MADT wakeup
Date: Wed, 24 Apr 2024 07:40:26 -0700 [thread overview]
Message-ID: <e1a71955-5228-47fe-9241-dd0197d4a552@intel.com> (raw)
In-Reply-To: <svpuqhoglv7s2wtu754i4oicowueen47vq6eobjbznsromb4m3@4h7vy346n4ak>
On 4/24/24 07:35, Kirill A. Shutemov wrote:
>> Also, does this need to go to stable although it is kinda big for
>> stable. If stable, do we need a smaller fix first which is backportable?
> Correct me, if I am wrong, but I believe TDX guest is the only user of
> ACPI MADT wake up method. At least it was added into kernel for TDX guest.
> So it wouldn't fix anything user-visible. It might affect a future
> platform that uses this wake up method, but it is a guessing game.
Yeah, the MADT wakeup is pretty funky, highly TDX specific, and not in
use or planned to be _put_ into use anywhere else. The X86S "fix" for
running in real mode does something else entirely:
https://cdrdv2.intel.com/v1/dl/getContent/776648
next prev parent reply other threads:[~2024-04-24 14:40 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-09 11:29 [PATCHv10 00/18] x86/tdx: Add kexec support Kirill A. Shutemov
2024-04-09 11:29 ` [PATCHv10 01/18] x86/acpi: Extract ACPI MADT wakeup code into a separate file Kirill A. Shutemov
2024-04-18 16:03 ` Borislav Petkov
2024-04-19 13:28 ` Kirill A. Shutemov
2024-04-09 11:29 ` [PATCHv10 02/18] x86/apic: Mark acpi_mp_wake_* variables as __ro_after_init Kirill A. Shutemov
2024-04-09 11:29 ` [PATCHv10 03/18] cpu/hotplug: Add support for declaring CPU offlining not supported Kirill A. Shutemov
2024-04-18 14:37 ` Borislav Petkov
2024-04-19 13:31 ` Kirill A. Shutemov
2024-04-23 13:17 ` Borislav Petkov
2024-04-09 11:29 ` [PATCHv10 04/18] cpu/hotplug, x86/acpi: Disable CPU offlining for ACPI MADT wakeup Kirill A. Shutemov
2024-04-23 16:02 ` Borislav Petkov
2024-04-24 8:38 ` Kirill A. Shutemov
2024-04-24 13:50 ` Borislav Petkov
2024-04-24 14:35 ` Kirill A. Shutemov
2024-04-24 14:40 ` Dave Hansen [this message]
2024-04-24 14:51 ` Borislav Petkov
2024-04-27 15:36 ` [PATCHv10.1 " Kirill A. Shutemov
2024-04-09 11:29 ` [PATCHv10 05/18] x86/kexec: Keep CR4.MCE set during kexec for TDX guest Kirill A. Shutemov
2024-04-09 12:38 ` Huang, Kai
2024-04-09 14:22 ` Sean Christopherson
2024-04-09 15:26 ` Kirill A. Shutemov
2024-04-28 17:11 ` Borislav Petkov
2024-04-29 13:17 ` Kirill A. Shutemov
2024-04-29 14:45 ` Borislav Petkov
2024-04-29 15:16 ` Kirill A. Shutemov
2024-04-30 12:57 ` Borislav Petkov
2024-04-30 13:03 ` Borislav Petkov
2024-04-30 14:49 ` Kirill A. Shutemov
2024-05-02 13:22 ` Borislav Petkov
2024-05-02 13:38 ` Borislav Petkov
2024-04-09 11:29 ` [PATCHv10 06/18] x86/mm: Make x86_platform.guest.enc_status_change_*() return errno Kirill A. Shutemov
2024-04-28 17:25 ` Borislav Petkov
2024-04-29 14:29 ` Kirill A. Shutemov
2024-04-29 14:53 ` Borislav Petkov
2024-05-03 16:29 ` Michael Kelley
2024-04-09 11:29 ` [PATCHv10 07/18] x86/mm: Return correct level from lookup_address() if pte is none Kirill A. Shutemov
2024-04-09 11:30 ` [PATCHv10 08/18] x86/tdx: Account shared memory Kirill A. Shutemov
2024-04-09 11:30 ` [PATCHv10 09/18] x86/mm: Adding callbacks to prepare encrypted memory for kexec Kirill A. Shutemov
2024-04-27 16:47 ` Borislav Petkov
2024-04-27 17:06 ` [PATCHv10.1 " Kirill A. Shutemov
2024-05-02 13:45 ` Borislav Petkov
2024-05-06 13:22 ` Kirill A. Shutemov
2024-05-06 14:21 ` Borislav Petkov
2024-04-09 11:30 ` [PATCHv10 10/18] x86/tdx: Convert shared memory back to private on kexec Kirill A. Shutemov
2024-05-05 12:13 ` Borislav Petkov
2024-05-06 15:37 ` Kirill A. Shutemov
2024-05-08 12:04 ` Borislav Petkov
2024-05-08 13:30 ` Kirill A. Shutemov
2024-04-09 11:30 ` [PATCHv10 11/18] x86/mm: Make e820_end_ram_pfn() cover E820_TYPE_ACPI ranges Kirill A. Shutemov
2024-05-08 12:12 ` Borislav Petkov
2024-04-09 11:30 ` [PATCHv10 12/18] x86/mm: Do not zap page table entries mapping unaccepted memory table during kdump Kirill A. Shutemov
2024-04-09 11:30 ` [PATCHv10 13/18] x86/acpi: Rename fields in acpi_madt_multiproc_wakeup structure Kirill A. Shutemov
2024-05-08 12:18 ` Borislav Petkov
2024-04-09 11:30 ` [PATCHv10 14/18] x86/acpi: Do not attempt to bring up secondary CPUs in kexec case Kirill A. Shutemov
2024-04-09 11:30 ` [PATCHv10 15/18] x86/smp: Add smp_ops.stop_this_cpu() callback Kirill A. Shutemov
2024-04-09 11:30 ` [PATCHv10 16/18] x86/mm: Introduce kernel_ident_mapping_free() Kirill A. Shutemov
2024-04-09 11:30 ` [PATCHv10 17/18] x86/acpi: Add support for CPU offlining for ACPI MADT wakeup method Kirill A. Shutemov
2024-04-09 11:30 ` [PATCHv10 18/18] ACPI: tables: Print MULTIPROC_WAKEUP when MADT is parsed Kirill A. Shutemov
2024-04-09 20:42 ` [PATCH v4 0/4] x86/snp: Add kexec support Ashish Kalra
2024-04-09 20:42 ` [PATCH v4 1/4] efi/x86: skip efi_arch_mem_reserve() in case of kexec Ashish Kalra
2024-04-09 20:42 ` [PATCH v4 2/4] x86/sev: add sev_es_enabled() function Ashish Kalra
2024-04-09 21:21 ` Borislav Petkov
2024-04-09 20:42 ` [PATCH v4 3/4] x86/boot/compressed: Skip Video Memory access in Decompressor for SEV-ES/SNP Ashish Kalra
2024-04-09 20:43 ` [PATCH v4 4/4] x86/snp: Convert shared memory back to private on kexec Ashish Kalra
2024-04-10 14:17 ` kernel test robot
2024-04-15 23:22 ` [PATCH v5 0/3] x86/snp: Add kexec support Ashish Kalra
2024-04-15 23:22 ` [PATCH v5 1/3] efi/x86: skip efi_arch_mem_reserve() in case of kexec Ashish Kalra
2024-04-24 14:48 ` Borislav Petkov
2024-04-24 21:17 ` Kalra, Ashish
2024-04-25 16:45 ` Kalra, Ashish
2024-04-26 14:21 ` Borislav Petkov
2024-04-26 14:47 ` Kalra, Ashish
2024-04-26 15:22 ` Borislav Petkov
2024-04-26 15:28 ` Kalra, Ashish
2024-04-26 15:34 ` Borislav Petkov
2024-04-26 16:32 ` Kalra, Ashish
2024-04-15 23:23 ` [PATCH v5 2/3] x86/boot/compressed: Skip Video Memory access in Decompressor for SEV-ES/SNP Ashish Kalra
2024-04-15 23:23 ` [PATCH v5 3/3] x86/snp: Convert shared memory back to private on kexec Ashish Kalra
2024-04-26 16:33 ` [PATCH v6 0/3] x86/snp: Add kexec support Ashish Kalra
2024-04-26 16:33 ` [PATCH v6 1/3] efi/x86: Fix EFI memory map corruption with kexec Ashish Kalra
2024-05-09 9:56 ` Ruirui Yang
2024-05-09 10:00 ` Dave Young
2024-05-10 18:36 ` Kalra, Ashish
2024-04-26 16:34 ` [PATCH v6 2/3] x86/boot/compressed: Skip Video Memory access in Decompressor for SEV-ES/SNP Ashish Kalra
2024-04-26 16:35 ` [PATCH v6 3/3] x86/snp: Convert shared memory back to private on kexec Ashish Kalra
2024-05-02 12:01 ` [PATCH v4 0/4] x86/snp: Add kexec support Alexander Graf
2024-05-02 12:18 ` Vitaly Kuznetsov
2024-05-03 8:32 ` Alexander Graf
2024-05-09 9:19 ` Vitaly Kuznetsov
2024-05-02 21:54 ` Kalra, Ashish
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