From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
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>,
Dario Faggioli <dfaggioli@suse.com>,
Mike Rapoport <rppt@kernel.org>,
David Hildenbrand <david@redhat.com>,
Mel Gorman <mgorman@techsingularity.net>,
marcelo.cerri@canonical.com, tim.gardner@canonical.com,
khalid.elmously@canonical.com, philip.cox@canonical.com,
aarcange@redhat.com, peterx@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: [PATCHv12 1/9] mm: Add support for unaccepted memory
Date: Wed, 31 May 2023 19:27:02 +0300 [thread overview]
Message-ID: <20230531162702.zfzex7vkhn3uqgvb@box.shutemov.name> (raw)
In-Reply-To: <20230531155159.GIZHdtH20Q0FsmN3OR@fat_crate.local>
On Wed, May 31, 2023 at 05:51:59PM +0200, Borislav Petkov wrote:
> On Fri, May 19, 2023 at 02:14:26AM +0300, Kirill A. Shutemov wrote:
> > The patch implements #1 and #2 for now. #2 is the default. Some
>
> s/This patch implements/Implement/
>
> > workloads may want to use #1 with accept_memory=eager in kernel
> > command line. #3 can be implemented later based on user's demands.
>
> All this remaining text should not talk about what is being done
> - that's in the diff - but why. Drop the "what" pls.
Does it look okay?
Implement #1 and #2 for now. #2 is the default. Some workloads may want
to use #1 with accept_memory=eager in kernel command line. #3 can be
implemented later based on user's demands.
Support of unaccepted memory requires a few changes in core-mm code:
- memblock accepts memory on allocation. It serves early boot memory
allocations and doesn't limit them to pre-accepted pool of memory.
- page allocator accepts memory on the first allocation of the page.
When kernel runs out of accepted memory, it accepts memory until the
high watermark is reached. It helps to minimize fragmentation.
EFI code will provide two helpers if the platform supports unaccepted
memory:
- accept_memory() makes a range of physical addresses accepted.
- range_contains_unaccepted_memory() checks anything within the range
of physical addresses requires acceptance.
--
Kiryl Shutsemau / Kirill A. Shutemov
next prev parent reply other threads:[~2023-05-31 16:27 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-18 23:14 [PATCHv12 0/9] mm, x86/cc, efi: Implement support for unaccepted memory Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 1/9] mm: Add " Kirill A. Shutemov
2023-05-31 15:51 ` Borislav Petkov
2023-05-31 16:27 ` Kirill A. Shutemov [this message]
2023-05-31 17:50 ` Borislav Petkov
2023-05-31 18:10 ` [PATCHv12.1 " Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 2/9] efi/x86: Get full memory map in allocate_e820() Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 3/9] efi/libstub: Implement support for unaccepted memory Kirill A. Shutemov
2023-05-19 15:12 ` Tom Lendacky
2023-05-18 23:14 ` [PATCHv12 4/9] x86/boot/compressed: Handle " Kirill A. Shutemov
2023-05-19 10:16 ` Kirill A. Shutemov
2023-05-22 11:01 ` Kirill A. Shutemov
2023-05-22 11:08 ` Ard Biesheuvel
2023-05-18 23:14 ` [PATCHv12 5/9] efi: Add unaccepted memory support Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 6/9] efi/unaccepted: Avoid load_unaligned_zeropad() stepping into unaccepted memory Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 7/9] x86/tdx: Make _tdx_hypercall() and __tdx_module_call() available in boot stub Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 8/9] x86/tdx: Refactor try_accept_one() Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 9/9] x86/tdx: Add unaccepted memory support Kirill A. Shutemov
2023-05-31 0:58 ` Isaku Yamahata
2023-05-31 12:25 ` Kirill A. Shutemov
2023-05-19 16:24 ` [PATCH 1/6] x86/sev: Fix calculation of end address based on number of pages Tom Lendacky
2023-05-19 16:31 ` Tom Lendacky
2023-05-19 16:24 ` [PATCH 2/6] x86/sev: Put PSC struct on the stack in prep for unaccepted memory support Tom Lendacky
2023-05-19 16:24 ` [PATCH 3/6] x86/sev: Allow for use of the early boot GHCB for PSC requests Tom Lendacky
2023-05-19 16:24 ` [PATCH 4/6] x86/sev: Use large PSC requests if applicable Tom Lendacky
2023-05-19 16:24 ` [PATCH 5/6] x86/sev: Add SNP-specific unaccepted memory support Tom Lendacky
2023-05-19 16:24 ` [PATCH 6/6] x86/efi: Safely enable unaccepted memory in UEFI Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 0/6] Provide SEV-SNP support for unaccepted memory Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 1/6] x86/sev: Fix calculation of end address based on number of pages Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 2/6] x86/sev: Put PSC struct on the stack in prep for unaccepted memory support Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 3/6] x86/sev: Allow for use of the early boot GHCB for PSC requests Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 4/6] x86/sev: Use large PSC requests if applicable Tom Lendacky
2023-06-06 10:46 ` Borislav Petkov
2023-05-19 16:30 ` [RESEND PATCH v8 5/6] x86/sev: Add SNP-specific unaccepted memory support Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 6/6] x86/efi: Safely enable unaccepted memory in UEFI Tom Lendacky
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