From: Borislav Petkov <bp@alien8.de>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>,
Sean Christopherson <seanjc@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Joerg Roedel <jroedel@suse.de>, Ard Biesheuvel <ardb@kernel.org>,
Andi Kleen <ak@linux.intel.com>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>,
David Rientjes <rientjes@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
Tom Lendacky <thomas.lendacky@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Varad Gautam <varad.gautam@suse.com>,
Dario Faggioli <dfaggioli@suse.com>,
Dave Hansen <dave.hansen@intel.com>,
Brijesh Singh <brijesh.singh@amd.com>,
Mike Rapoport <rppt@kernel.org>,
David Hildenbrand <david@redhat.com>,
x86@kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
Mike Rapoport <rppt@linux.ibm.com>
Subject: Re: [PATCHv5 07/12] x86/mm: Reserve unaccepted memory bitmap
Date: Wed, 4 May 2022 13:04:36 +0200 [thread overview]
Message-ID: <YnJdxAri0OmokZ+X@zn.tnic> (raw)
In-Reply-To: <20220425033934.68551-8-kirill.shutemov@linux.intel.com>
On Mon, Apr 25, 2022 at 06:39:29AM +0300, Kirill A. Shutemov wrote:
> A given page of memory can only be accepted once. The kernel has a need
s/has a need to/has to/
> to accept memory both in the early decompression stage and during normal
> runtime.
>
> A bitmap used to communicate the acceptance state of each page between the
^
is
> decompression stage and normal runtime.
>
> boot_params is used to communicate location of the bitmap through out
throughout
> the boot. The bitmap is allocated and initially populated in EFI stub.
> Decompression stage accepts pages required for kernel/initrd and mark
marks
> these pages accordingly in the bitmap. The main kernel picks up the
> bitmap from the same boot_params and uses it to determinate what has to
determine
> be accepted on allocation.
>
> In the runtime kernel, reserve the bitmap's memory to ensure nothing
> overwrites it.
>
> The size of bitmap is determinated with e820__end_of_ram_pfn() which
Unknown word [determinated] in commit message.
Suggestions: ['determinate', 'determined', 'terminated', 'determinant']
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2022-05-04 11:04 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-25 3:39 [PATCHv5 00/12] mm, x86/cc: Implement support for unaccepted memory Kirill A. Shutemov
2022-04-25 3:39 ` [PATCHv5 01/12] x86/boot/: Centralize __pa()/__va() definitions Kirill A. Shutemov
2022-04-25 7:37 ` David Hildenbrand
2022-04-25 7:52 ` Mike Rapoport
2022-04-25 3:39 ` [PATCHv5 02/12] mm: Add support for unaccepted memory Kirill A. Shutemov
2022-04-28 10:05 ` Borislav Petkov
2022-05-03 20:21 ` David Hildenbrand
2022-05-06 0:54 ` Kirill A. Shutemov
2022-04-25 3:39 ` [PATCHv5 03/12] efi/x86: Get full memory map in allocate_e820() Kirill A. Shutemov
[not found] ` <YmmmpxVDyc3R5K2t@zn.tnic>
2022-04-27 23:48 ` Kirill A. Shutemov
2022-04-25 3:39 ` [PATCHv5 04/12] x86/boot: Add infrastructure required for unaccepted memory support Kirill A. Shutemov
2022-04-29 10:58 ` Wander Lairson Costa
2022-05-02 13:38 ` Kirill A. Shutemov
2022-04-25 3:39 ` [PATCHv5 05/12] efi/x86: Implement support for unaccepted memory Kirill A. Shutemov
2022-04-29 10:53 ` Borislav Petkov
2022-05-02 13:40 ` Kirill A. Shutemov
2022-04-25 3:39 ` [PATCHv5 06/12] x86/boot/compressed: Handle " Kirill A. Shutemov
2022-04-27 0:17 ` Michael Roth
2022-04-27 14:19 ` Kirill A. Shutemov
2022-05-03 14:15 ` Borislav Petkov
2022-04-29 13:10 ` Wander Lairson Costa
2022-05-03 14:12 ` Borislav Petkov
2022-05-06 15:30 ` Kirill A. Shutemov
2022-05-10 11:03 ` Borislav Petkov
2022-05-13 5:31 ` Dionna Amalie Glaze
2022-05-13 5:34 ` Dionna Amalie Glaze
2022-05-13 9:01 ` Borislav Petkov
2022-05-13 14:45 ` Kirill A. Shutemov
2022-05-16 6:46 ` Xu, Min M
2022-05-31 22:37 ` Dionna Amalie Glaze
2022-05-31 22:40 ` Dionna Amalie Glaze
2022-06-01 15:49 ` Gupta, Pankaj
2022-06-01 16:20 ` Dionna Amalie Glaze
2022-06-01 19:34 ` Randy Dunlap
2022-06-01 21:19 ` Gupta, Pankaj
2022-06-02 12:51 ` Gupta, Pankaj
2022-06-02 15:31 ` Dionna Amalie Glaze
2022-06-07 17:28 ` Dionna Amalie Glaze
2022-06-07 18:15 ` Gupta, Pankaj
2022-04-25 3:39 ` [PATCHv5 07/12] x86/mm: Reserve unaccepted memory bitmap Kirill A. Shutemov
2022-04-29 13:19 ` Wander Lairson Costa
2022-05-04 11:04 ` Borislav Petkov [this message]
2022-04-25 3:39 ` [PATCHv5 08/12] x86/mm: Provide helpers for unaccepted memory Kirill A. Shutemov
2022-05-04 11:12 ` Borislav Petkov
2022-05-06 16:13 ` Kirill A. Shutemov
2022-05-10 18:32 ` Borislav Petkov
2022-05-11 1:15 ` Kirill A. Shutemov
2022-05-11 9:07 ` Borislav Petkov
2022-04-25 3:39 ` [PATCHv5 09/12] x86/tdx: Make _tdx_hypercall() and __tdx_module_call() available in boot stub Kirill A. Shutemov
2022-04-25 3:39 ` [PATCHv5 10/12] x86/tdx: Unaccepted memory support Kirill A. Shutemov
2022-05-05 10:12 ` Borislav Petkov
2022-05-06 20:44 ` Kirill A. Shutemov
2022-05-11 1:19 ` Kirill A. Shutemov
2022-05-11 9:13 ` Borislav Petkov
2022-04-25 3:39 ` [PATCHv5 11/12] mm/vmstat: Add counter for memory accepting Kirill A. Shutemov
2022-04-25 3:39 ` [PATCHv5 12/12] x86/mm: Report unaccepted memory in /proc/meminfo Kirill A. Shutemov
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