From: Dave Hansen <dave.hansen@intel.com>
To: Tom Lendacky <thomas.lendacky@amd.com>,
linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
"H. Peter Anvin" <hpa@zytor.com>,
Michael Roth <michael.roth@amd.com>,
Joerg Roedel <jroedel@suse.de>, Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH v1 1/2] x86/sev: Use per-CPU PSC structure in prep for unaccepted memory support
Date: Fri, 29 Jul 2022 12:28:45 -0700 [thread overview]
Message-ID: <70a5c939-16a6-d5e0-2e38-ac7adbed5fc1@intel.com> (raw)
In-Reply-To: <efde397b-35fc-c47b-b21e-898fa2ec6920@amd.com>
On 7/29/22 12:22, Tom Lendacky wrote:
>> I think this tidbit from the changelog threw me off:
>>
>>> Protect the use of the per-CPU structure by disabling interrupts during
>>> memory acceptance.
>>
>> Could you please revise that to accurately capture the impact of this
>> change?
>
> Is s/memory acceptance/page state changes/ enough of what you are
> looking for or something more?
That, plus a reminder of when "page state changes" are performed would
be nice. How frequent are they? Are they performance sensitive?
That'll help us decide if the design here is appropriate or not.
next prev parent reply other threads:[~2022-07-29 19:28 UTC|newest]
Thread overview: 207+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-14 12:02 [PATCHv7 00/14] mm, x86/cc: Implement support for unaccepted memory Kirill A. Shutemov
2022-06-14 12:02 ` [PATCHv7 01/14] x86/boot: Centralize __pa()/__va() definitions Kirill A. Shutemov
2022-06-23 17:37 ` Dave Hansen
2022-06-14 12:02 ` [PATCHv7 02/14] mm: Add support for unaccepted memory Kirill A. Shutemov
2022-06-14 12:57 ` Gupta, Pankaj
2022-06-17 19:28 ` Tom Lendacky
2022-06-17 20:53 ` Tom Lendacky
2022-07-21 15:14 ` Borislav Petkov
2022-07-21 15:49 ` Dave Hansen
2022-07-22 19:18 ` Borislav Petkov
2022-07-22 19:30 ` Dave Hansen
2022-07-25 12:23 ` Borislav Petkov
2022-07-25 12:38 ` David Hildenbrand
2022-07-25 12:53 ` Borislav Petkov
2022-07-26 14:30 ` David Hildenbrand
2022-07-25 13:00 ` Mike Rapoport
2022-07-25 13:05 ` Borislav Petkov
2022-08-05 11:49 ` Vlastimil Babka
2022-08-05 12:09 ` David Hildenbrand
2022-08-05 13:38 ` Vlastimil Babka
2022-08-05 14:22 ` David Hildenbrand
2022-08-05 14:53 ` Dave Hansen
2022-08-05 14:41 ` Dave Hansen
2022-08-05 18:17 ` Vlastimil Babka
2022-08-08 15:55 ` Dave Hansen
2022-08-10 14:19 ` Mel Gorman
2022-08-15 21:08 ` Dionna Amalie Glaze
2022-08-15 22:02 ` Tom Lendacky
2022-08-29 16:02 ` Dionna Amalie Glaze
2022-08-29 16:19 ` Dave Hansen
2022-09-06 17:50 ` Dionna Amalie Glaze
2022-09-08 12:11 ` Mike Rapoport
2022-09-08 16:23 ` Dionna Amalie Glaze
2022-09-08 19:28 ` Mike Rapoport
2022-09-22 14:31 ` Tom Lendacky
2022-09-24 1:03 ` Kirill A. Shutemov
2022-09-24 9:36 ` Mike Rapoport
2022-09-26 12:10 ` Kirill A. Shutemov
2022-09-26 13:38 ` Tom Lendacky
2022-09-26 15:42 ` Kirill A. Shutemov
2022-09-26 15:42 ` Tom Lendacky
2022-06-14 12:02 ` [PATCHv7 03/14] mm: Report unaccepted memory in meminfo Kirill A. Shutemov
2022-07-26 14:33 ` David Hildenbrand
2022-06-14 12:02 ` [PATCHv7 04/14] efi/x86: Get full memory map in allocate_e820() Kirill A. Shutemov
2022-07-25 13:02 ` Borislav Petkov
2022-06-14 12:02 ` [PATCHv7 05/14] x86/boot: Add infrastructure required for unaccepted memory support Kirill A. Shutemov
2022-06-15 10:19 ` Peter Zijlstra
2022-06-15 15:05 ` Kirill A. Shutemov
2022-07-17 17:16 ` Borislav Petkov
2022-07-25 21:33 ` Borislav Petkov
2022-06-14 12:02 ` [PATCHv7 06/14] efi/x86: Implement support for unaccepted memory Kirill A. Shutemov
2022-06-22 19:58 ` Dave Hansen
2022-07-26 8:35 ` Borislav Petkov
2022-06-14 12:02 ` [PATCHv7 07/14] x86/boot/compressed: Handle " Kirill A. Shutemov
2022-06-14 12:02 ` [PATCHv7 08/14] x86/mm: Reserve unaccepted memory bitmap Kirill A. Shutemov
2022-07-26 9:07 ` Borislav Petkov
2022-11-30 1:28 ` Kirill A. Shutemov
2022-12-01 9:37 ` Mike Rapoport
2022-12-01 13:47 ` Kirill A. Shutemov
2022-06-14 12:02 ` [PATCHv7 09/14] x86/mm: Provide helpers for unaccepted memory Kirill A. Shutemov
2022-06-14 12:02 ` [PATCHv7 10/14] x86/mm: Avoid load_unaligned_zeropad() stepping into " Kirill A. Shutemov
2022-06-23 17:19 ` Dave Hansen
2022-07-26 10:21 ` Borislav Petkov
2022-08-02 23:46 ` Dave Hansen
2022-08-03 14:02 ` Dave Hansen
2022-08-11 11:26 ` Borislav Petkov
2022-08-13 16:11 ` Andy Lutomirski
2022-08-13 21:13 ` Kirill A. Shutemov
2022-08-13 16:04 ` Andy Lutomirski
2022-08-13 20:58 ` Kirill A. Shutemov
2022-07-26 17:25 ` Borislav Petkov
2022-07-26 17:46 ` Dave Hansen
2022-07-26 20:17 ` Andy Lutomirski
2022-08-09 11:38 ` Kirill A. Shutemov
2022-08-13 16:03 ` Andy Lutomirski
2022-08-13 21:02 ` Kirill A. Shutemov
2022-06-14 12:02 ` [PATCHv7 11/14] x86: Disable kexec if system has " Kirill A. Shutemov
2022-06-23 17:23 ` Dave Hansen
2022-06-23 17:23 ` Dave Hansen
2022-06-23 21:48 ` Eric W. Biederman
2022-06-23 21:48 ` Eric W. Biederman
2022-06-24 2:00 ` Kirill A. Shutemov
2022-06-24 2:00 ` Kirill A. Shutemov
2022-06-28 23:51 ` Kirill A. Shutemov
2022-06-28 23:51 ` Kirill A. Shutemov
2022-06-29 0:10 ` Dave Hansen
2022-06-29 0:10 ` Dave Hansen
2022-06-29 0:59 ` Kirill A. Shutemov
2022-06-29 0:59 ` Kirill A. Shutemov
2022-07-04 7:18 ` Dave Young
2022-07-04 7:18 ` Dave Young
2022-06-14 12:02 ` [PATCHv7 12/14] x86/tdx: Make _tdx_hypercall() and __tdx_module_call() available in boot stub Kirill A. Shutemov
2022-06-23 17:25 ` Dave Hansen
2022-06-14 12:02 ` [PATCHv7 13/14] x86/tdx: Refactor try_accept_one() Kirill A. Shutemov
2022-06-23 17:31 ` Dave Hansen
2022-07-26 10:58 ` Borislav Petkov
2022-06-14 12:02 ` [PATCHv7 14/14] x86/tdx: Add unaccepted memory support Kirill A. Shutemov
2022-06-24 16:22 ` Dave Hansen
2022-06-27 10:42 ` Kirill A. Shutemov
2022-07-26 14:51 ` Borislav Petkov
2022-08-09 11:45 ` Kirill A. Shutemov
2022-08-10 10:27 ` Borislav Petkov
2022-06-24 16:37 ` [PATCHv7 00/14] mm, x86/cc: Implement support for unaccepted memory Peter Gonda
2022-06-24 16:57 ` Dave Hansen
2022-06-24 17:06 ` Marc Orr
2022-06-24 17:09 ` Dave Hansen
2022-06-24 17:15 ` Peter Gonda
2022-06-24 17:19 ` Marc Orr
2022-06-24 17:21 ` Peter Gonda
2022-06-24 17:47 ` Dave Hansen
2022-06-24 18:10 ` Peter Gonda
2022-06-24 18:13 ` Dave Hansen
2022-06-24 17:40 ` Michael Roth
2022-06-24 17:58 ` Michael Roth
2022-06-24 18:05 ` Peter Gonda
2022-06-27 11:30 ` Kirill A. Shutemov
2022-06-27 11:54 ` Ard Biesheuvel
2022-06-27 12:22 ` Kirill A. Shutemov
2022-06-27 16:17 ` Peter Gonda
2022-06-27 16:33 ` Ard Biesheuvel
2022-06-27 22:38 ` Kirill A. Shutemov
2022-06-28 17:17 ` Ard Biesheuvel
2022-07-18 17:21 ` Kirill A. Shutemov
2022-07-18 23:32 ` Dionna Amalie Glaze
2022-07-19 0:31 ` Dionna Amalie Glaze
2022-07-19 18:29 ` Dionna Amalie Glaze
2022-07-19 19:13 ` Borislav Petkov
2022-07-19 20:45 ` Ard Biesheuvel
2022-07-19 21:23 ` Borislav Petkov
2022-07-19 21:35 ` Dave Hansen
2022-07-19 21:50 ` Borislav Petkov
2022-07-19 22:01 ` Kirill A. Shutemov
2022-07-19 22:02 ` Dave Hansen
2022-07-19 22:08 ` Tom Lendacky
2022-07-20 0:26 ` Marc Orr
2022-07-20 5:44 ` Borislav Petkov
2022-07-20 17:03 ` Marc Orr
2022-07-22 15:07 ` Borislav Petkov
2022-07-21 17:12 ` Dave Hansen
2022-07-23 11:14 ` Ard Biesheuvel
2022-07-28 22:01 ` Dionna Amalie Glaze
2022-08-09 11:14 ` Kirill A. Shutemov
2022-08-09 11:36 ` Ard Biesheuvel
2022-08-09 11:54 ` Kirill A. Shutemov
2022-08-09 21:09 ` Dionna Amalie Glaze
2022-07-19 2:48 ` Yao, Jiewen
2022-07-29 14:01 ` [PATCH v1 0/2] Provide SEV-SNP " Tom Lendacky
2022-07-29 14:01 ` [PATCH v1 1/2] x86/sev: Use per-CPU PSC structure in prep for unaccepted memory support Tom Lendacky
2022-07-29 14:18 ` Dave Hansen
2022-07-29 14:25 ` Tom Lendacky
2022-07-29 19:08 ` Dave Hansen
2022-07-29 19:22 ` Tom Lendacky
2022-07-29 19:28 ` Dave Hansen [this message]
2022-07-29 20:12 ` Tom Lendacky
2022-08-03 18:11 ` [PATCH v1.1 0/2] Provide SEV-SNP support for unaccepted memory Tom Lendacky
2022-08-03 18:11 ` [PATCH v1.1 1/2] x86/sev: Use per-CPU PSC structure in prep for unaccepted memory support Tom Lendacky
2022-08-03 18:17 ` Dave Hansen
2022-08-03 18:21 ` Tom Lendacky
2022-08-03 18:24 ` Dave Hansen
2022-08-03 21:03 ` Tom Lendacky
2022-08-03 21:18 ` Dave Hansen
2022-08-03 21:34 ` Tom Lendacky
2022-08-03 21:48 ` Dave Hansen
2022-08-03 22:17 ` Tom Lendacky
2022-08-03 18:18 ` Tom Lendacky
2022-08-03 18:11 ` [PATCH v1.1 2/2] x86/sev: Add SNP-specific " Tom Lendacky
2022-07-29 14:01 ` [PATCH v1 " Tom Lendacky
2022-08-23 0:24 ` Dionna Amalie Glaze
2022-08-23 14:28 ` Tom Lendacky
2022-08-23 23:28 ` Dionna Amalie Glaze
2022-08-08 17:16 ` [PATCH v2 0/2] Provide SEV-SNP support for unaccepted memory Tom Lendacky
2022-08-08 17:16 ` [PATCH v2 1/2] x86/sev: Put PSC struct on the stack in prep for unaccepted memory support Tom Lendacky
2022-08-08 21:43 ` Dave Hansen
2022-08-08 22:18 ` Tom Lendacky
2022-08-08 22:33 ` Dave Hansen
2022-08-08 22:35 ` Tom Lendacky
2022-08-12 13:03 ` Borislav Petkov
2022-08-12 14:11 ` Tom Lendacky
2022-08-12 14:33 ` Borislav Petkov
2022-08-12 14:51 ` Tom Lendacky
2022-08-13 19:40 ` Borislav Petkov
2022-08-14 13:36 ` Tom Lendacky
2022-08-08 17:16 ` [PATCH v2 2/2] x86/sev: Add SNP-specific " Tom Lendacky
2022-08-15 15:57 ` [PATCH v3 0/2] Provide SEV-SNP support for unaccepted memory Tom Lendacky
2022-08-15 15:57 ` [PATCH v3 1/2] x86/sev: Put PSC struct on the stack in prep for unaccepted memory support Tom Lendacky
2022-08-17 16:08 ` Borislav Petkov
2022-08-17 21:17 ` Tom Lendacky
2022-08-15 15:57 ` [PATCH v3 2/2] x86/sev: Add SNP-specific " Tom Lendacky
2022-08-18 13:39 ` Borislav Petkov
2022-08-25 14:23 ` [PATCH v4 0/4] Provide SEV-SNP support for unaccepted memory Tom Lendacky
2022-08-25 14:23 ` [PATCH v4 1/4] x86/sev: Put PSC struct on the stack in prep for unaccepted memory support Tom Lendacky
2022-09-20 16:15 ` Borislav Petkov
2022-08-25 14:23 ` [PATCH v4 2/4] x86/sev: Allow for use of the early boot GHCB for PSC requests Tom Lendacky
2022-08-25 14:23 ` [PATCH v4 3/4] x86/sev: Use large PSC requests if applicable Tom Lendacky
2022-08-25 14:23 ` [PATCH v4 4/4] x86/sev: Add SNP-specific unaccepted memory support Tom Lendacky
2022-08-25 22:10 ` Dionna Amalie Glaze
2022-08-26 21:29 ` Tom Lendacky
2022-09-27 17:04 ` [PATCH v5 0/6] Provide SEV-SNP support for unaccepted memory Tom Lendacky
2022-09-27 17:04 ` [PATCH v5 1/6] x86/sev: Fix calculation of end address based on number of pages Tom Lendacky
2022-09-27 17:10 ` Dave Hansen
2022-09-27 20:45 ` Tom Lendacky
2022-09-27 19:04 ` Dionna Amalie Glaze
2022-09-27 17:04 ` [PATCH v5 2/6] " Tom Lendacky
2022-09-27 17:04 ` [PATCH v5 3/6] x86/sev: Put PSC struct on the stack in prep for unaccepted memory support Tom Lendacky
2022-09-27 17:04 ` [PATCH v5 4/6] x86/sev: Allow for use of the early boot GHCB for PSC requests Tom Lendacky
2022-09-27 17:04 ` [PATCH v5 5/6] x86/sev: Use large PSC requests if applicable Tom Lendacky
2022-09-27 17:04 ` [PATCH v5 6/6] x86/sev: Add SNP-specific unaccepted memory support Tom Lendacky
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