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From: Joerg Roedel <jroedel@suse.de>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Mike Rapoport <rppt@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>,
	Sean Christopherson <seanjc@google.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vlastimil Babka <vbabka@suse.cz>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Andi Kleen <ak@linux.intel.com>,
	Brijesh Singh <brijesh.singh@amd.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Jon Grimm <jon.grimm@amd.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Ingo Molnar <mingo@redhat.com>,
	"Kaplan, David" <David.Kaplan@amd.com>,
	Varad Gautam <varad.gautam@suse.com>,
	Dario Faggioli <dfaggioli@suse.com>,
	x86@kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev
Subject: Re: Runtime Memory Validation in Intel-TDX and AMD-SNP
Date: Wed, 21 Jul 2021 12:53:19 +0200	[thread overview]
Message-ID: <YPf8n9hdHmGe5AqV@suse.de> (raw)
In-Reply-To: <20210721100206.mfldptiwiothowpz@box>

On Wed, Jul 21, 2021 at 01:02:06PM +0300, Kirill A. Shutemov wrote:
> Yeah, we would need to reconstruct the EFI map somehow. Or we can give
> most of memory back to the host and accept/validate the memory again after
> reboot/kexec. I donno.

Invalidating all memory will also take a lot of time (in the range of
seconds). And the EFI map can get pretty large when there is enough
fragmentation. The easiest way to handle this is to just pass on an
up-to-date data structure.

Regards,

	Joerg

  parent reply	other threads:[~2021-07-21 10:53 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19 12:58 Runtime Memory Validation in Intel-TDX and AMD-SNP Joerg Roedel
2021-07-19 13:07 ` Matthew Wilcox
2021-07-19 15:02   ` Joerg Roedel
2021-07-19 20:39 ` Andi Kleen
2021-07-20  8:55   ` Joerg Roedel
2021-07-20  9:34     ` Dr. David Alan Gilbert
2021-07-20 11:50       ` Joerg Roedel
2021-07-20  0:26 ` Andy Lutomirski
2021-07-20  1:51   ` Erdem Aktas
2021-07-20  2:00     ` Erdem Aktas
2021-07-20  3:30     ` Andy Lutomirski
2021-07-20 19:54       ` Erdem Aktas
2021-07-20 22:01         ` Andi Kleen
2021-07-20 23:55           ` Erdem Aktas
2021-07-21  0:35             ` Andi Kleen
2021-07-21  8:51           ` Joerg Roedel
2021-07-20  5:17     ` Andi Kleen
2021-07-20  9:11       ` Joerg Roedel
2021-07-20 17:32         ` Andi Kleen
2021-07-20 23:09       ` Erdem Aktas
2021-07-21  0:38         ` Andi Kleen
2021-07-22 17:31       ` Marc Orr
2021-07-26 18:55         ` Joerg Roedel
2021-07-20  8:44   ` Joerg Roedel
2021-07-20 14:14   ` Dave Hansen
2021-07-20 17:30 ` Kirill A. Shutemov
2021-07-21  9:20   ` Mike Rapoport
2021-07-21 10:02     ` Kirill A. Shutemov
2021-07-21 10:22       ` Mike Rapoport
2021-07-21 10:53       ` Joerg Roedel [this message]
2021-07-21  9:25   ` Joerg Roedel
2021-07-21 10:25     ` Kirill A. Shutemov
2021-07-21 10:48       ` Joerg Roedel
2021-07-22 15:46   ` David Hildenbrand
2021-07-26 19:02     ` Joerg Roedel
2021-07-27  9:34       ` David Hildenbrand
2021-08-02 10:19         ` Joerg Roedel
2021-08-02 18:47           ` David Hildenbrand
2021-07-22 15:57 ` David Hildenbrand
2021-07-22 19:51 ` Kirill A. Shutemov
2021-07-23 15:23   ` Mike Rapoport
2021-07-23 16:29     ` Kirill A. Shutemov
2021-07-25  9:16       ` Mike Rapoport
2021-07-25 18:28         ` Kirill A. Shutemov
2021-07-26 10:00           ` Mike Rapoport
2021-07-26 11:53             ` Kirill A. Shutemov
2021-07-26 19:13   ` Joerg Roedel
2021-07-26 23:02   ` Erdem Aktas
2021-07-26 23:54     ` Kirill A. Shutemov
2021-07-27  1:35       ` Erdem Aktas
2021-07-23 11:04 ` Varad Gautam
2021-07-23 14:34   ` Kaplan, David

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