From: Dave Hansen <dave.hansen@intel.com>
To: Nadav Amit <nadav.amit@gmail.com>
Cc: Andy Lutomirski <luto@kernel.org>,
Alexander Graf <graf@amazon.com>,
Thomas Gleixner <tglx@linutronix.de>,
Marius Hillenbrand <mhillenb@amazon.de>,
kvm list <kvm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Kernel Hardening <kernel-hardening@lists.openwall.com>,
Linux-MM <linux-mm@kvack.org>, Alexander Graf <graf@amazon.de>,
David Woodhouse <dwmw@amazon.co.uk>,
the arch/x86 maintainers <x86@kernel.org>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [RFC 00/10] Process-local memory allocations for hiding KVM secrets
Date: Mon, 17 Jun 2019 11:55:58 -0700 [thread overview]
Message-ID: <57a319bf-73da-c04b-cdff-1717f3699268@intel.com> (raw)
In-Reply-To: <3131CDA2-F6CF-43AC-A9FC-448DC6983596@gmail.com>
On 6/17/19 11:50 AM, Nadav Amit wrote:
>> The idea is that you have a per-cpu address space. Certain kernel
>> virtual addresses would map to different physical address based on where
>> you are running. Each of the physical addresses would be "owned" by a
>> single CPU and would, by convention, never use a PGD that mapped an
>> address unless that CPU that "owned" it.
>>
>> In that case, you never really invalidate those addresses.
> I understand, but as I see it, this is not related directly to PCIDs.
Yeah, the only link I was thinking of is that we can manage per-CPU PGDs
in the same way that we manage PCIDs. Basically we can reuse a chunk of
the software concept.
next prev parent reply other threads:[~2019-06-17 18:56 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-12 17:08 [RFC 00/10] Process-local memory allocations for hiding KVM secrets Marius Hillenbrand
2019-06-12 17:08 ` [RFC 01/10] x86/mm/kaslr: refactor to use enum indices for regions Marius Hillenbrand
2019-06-12 17:08 ` [RFC 02/10] x86/speculation, mm: add process local virtual memory region Marius Hillenbrand
2019-06-12 17:08 ` [RFC 03/10] x86/mm, mm,kernel: add teardown for process-local memory to mm cleanup Marius Hillenbrand
2019-06-12 17:08 ` [RFC 04/10] mm: allocate virtual space for process-local memory Marius Hillenbrand
2019-06-12 17:08 ` [RFC 05/10] mm: allocate/release physical pages " Marius Hillenbrand
2019-06-12 17:08 ` [RFC 06/10] kvm/x86: add support for storing vCPU state in " Marius Hillenbrand
2019-06-12 17:08 ` [RFC 07/10] kvm, vmx: move CR2 context switch out of assembly path Marius Hillenbrand
2019-06-12 17:08 ` [RFC 08/10] kvm, vmx: move register clearing " Marius Hillenbrand
2019-06-12 17:08 ` [RFC 09/10] kvm, vmx: move gprs to process local memory Marius Hillenbrand
2019-06-12 17:08 ` [RFC 10/10] kvm, x86: move guest FPU state into " Marius Hillenbrand
2019-06-12 18:25 ` [RFC 00/10] Process-local memory allocations for hiding KVM secrets Sean Christopherson
2019-06-13 7:20 ` Alexander Graf
2019-06-13 10:54 ` Liran Alon
2019-06-12 19:55 ` Dave Hansen
2019-06-12 20:27 ` Andy Lutomirski
2019-06-12 20:41 ` Dave Hansen
2019-06-12 20:56 ` Andy Lutomirski
2019-06-13 1:30 ` Andy Lutomirski
2019-06-13 1:50 ` Nadav Amit
2019-06-13 16:16 ` Andy Lutomirski
2019-06-13 7:52 ` Alexander Graf
2019-06-13 16:13 ` Andy Lutomirski
2019-06-13 16:20 ` Dave Hansen
2019-06-13 17:29 ` Nadav Amit
2019-06-13 17:49 ` Dave Hansen
2019-06-13 20:05 ` Sean Christopherson
2019-06-14 14:21 ` Thomas Gleixner
2019-06-16 22:18 ` Andy Lutomirski
2019-06-16 22:28 ` Thomas Gleixner
2019-06-17 7:38 ` Alexander Graf
2019-06-17 15:50 ` Dave Hansen
2019-06-17 15:54 ` Andy Lutomirski
2019-06-17 16:03 ` Dave Hansen
2019-06-17 16:14 ` Andy Lutomirski
2019-06-17 16:53 ` Nadav Amit
2019-06-17 18:07 ` Dave Hansen
2019-06-17 18:45 ` Konrad Rzeszutek Wilk
2019-06-17 18:49 ` Dave Hansen
2019-06-17 18:53 ` Andy Lutomirski
2019-06-17 18:50 ` Nadav Amit
2019-06-17 18:55 ` Dave Hansen [this message]
2019-06-13 7:27 ` Alexander Graf
2019-06-13 14:19 ` Dave Hansen
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