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From: Sean Christopherson <seanjc@google.com>
To: Vishal Annapurve <vannapurve@google.com>
Cc: David Hildenbrand <david@redhat.com>,
	Chao Peng <chao.p.peng@linux.intel.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	"Maciej S . Szmigiero" <mail@maciej.szmigiero.name>,
	Vlastimil Babka <vbabka@suse.cz>,
	Yu Zhang <yu.c.zhang@linux.intel.com>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	dhildenb@redhat.com, Quentin Perret <qperret@google.com>,
	tabba@google.com, Michael Roth <michael.roth@amd.com>,
	wei.w.wang@intel.com, Mike Rapoport <rppt@kernel.org>,
	Liam Merwick <liam.merwick@oracle.com>,
	Isaku Yamahata <isaku.yamahata@gmail.com>,
	Jarkko Sakkinen <jarkko@kernel.org>,
	Ackerley Tng <ackerleytng@google.com>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Hugh Dickins <hughd@google.com>,
	Christian Brauner <brauner@kernel.org>
Subject: Re: Rename restrictedmem => guardedmem? (was: Re: [PATCH v10 0/9] KVM: mm: fd-based approach for supporting KVM)
Date: Wed, 10 May 2023 14:39:18 -0700	[thread overview]
Message-ID: <ZFwPBqGeW+d9xMEs@google.com> (raw)
In-Reply-To: <CAGtprH_+bF4VZg2ps6CM8vjJVvShsvSGAvaLfTedts4cKqhSUw@mail.gmail.com>

On Wed, May 10, 2023, Vishal Annapurve wrote:
> On Fri, Apr 21, 2023 at 6:33 PM Sean Christopherson <seanjc@google.com> wrote:
> >
> > ...
> > cold.  I poked around a bit to see how we could avoid reinventing all of that
> > infrastructure for fd-only memory, and the best idea I could come up with is
> > basically a rehash of Kirill's very original "KVM protected memory" RFC[3], i.e.
> > allow "mapping" fd-only memory, but ensure that memory is never actually present
> > from hardware's perspective.
> >
> 
> I am most likely missing a lot of context here and possibly venturing
> into an infeasible/already shot down direction here.

Both :-)

> But I would still like to get this discussed here before we move on.
> 
> I am wondering if it would make sense to implement
> restricted_mem/guest_mem file to expose both private and shared memory
> regions, inline with Kirill's original proposal now that the file
> implementation is controlled by KVM.
> 
> Thinking from userspace perspective:
> 1) Userspace creates guest mem files and is able to mmap them but all
> accesses to these files result into faults as no memory is allowed to
> be mapped into userspace VMM pagetables.

Never mapping anything into the userspace page table is infeasible.  Technically
it's doable, but it'd effectively require all of the work of an fd-based approach
(and probably significantly more), _and_ it'd require touching core mm code.

VMAs don't provide hva=>pfn information, they're the kernel's way of implementing
the abstraction provided to userspace by mmap(), mprotect() etc.  Among many other
things, a VMA describes properties of what is mapped, e.g. hugetblfs versus
anonymous, where memory is mapped (virtual address), how memory is mapped, e.g.
RWX protections, etc.  But a VMA doesn't track the physical address, that info
is all managed through the userspace page tables.

To make it possible to allow userspace to mmap() but not access memory (without
redoing how the kernel fundamentally manages virtual=>physical mappings), the
simplest approach is to install PTEs into userspace page tables, but never mark
them Present in hardware, i.e. prevent actually accessing the backing memory.
This is is exactly what Kirill's series in link [3] below implemented.

Issues that led to us abandoning the "map with special !Present PTEs" approach:

 - Using page tables, i.e. hardware defined structures, to track gfn=>pfn mappings
   is inefficient and inflexible compared to software defined structures, especially
   for the expected use cases for CoCo guests.

 - The kernel wouldn't _easily_ be able to enforce a 1:1 page:guest association,
   let alone a 1:1 pfn:gfn mapping.
 
 - Does not work for memory that isn't backed by 'struct page', e.g. if devices
   gain support for exposing encrypted memory regions to guests.

 - Poking into the VMAs to convert memory would be likely be less performant due
   to using infrastructure that is much "heavier", e.g. would require taking
   mmap_lock for write.

In short, shoehorning this into mmap() requires fighting how the kernel works at
pretty much every step, and in the end, adding e.g. fbind() is a lot easier.

> 2) Userspace registers mmaped HVA ranges with KVM with additional
> KVM_MEM_PRIVATE flag
> 3) Userspace converts memory attributes and this memory conversion
> allows userspace to access shared ranges of the file because those are
> allowed to be faulted in from guest_mem. Shared to private conversion
> unmaps the file ranges from userspace VMM pagetables.
> 4) Granularity of userspace pagetable mappings for shared ranges will
> have to be dictated by KVM guest_mem file implementation.
> 
> Caveat here is that once private pages are mapped into userspace view.
> 
> Benefits here:
> 1) Userspace view remains consistent while still being able to use HVA ranges
> 2) It would be possible to use HVA based APIs from userspace to do
> things like binding.
> 3) Double allocation wouldn't be a concern since hva ranges and gpa
> ranges possibly map to the same HPA ranges.

#3 isn't entirely correct.  If a different process (call it "B") maps shared memory,
and then the guest converts that memory from shared to private, the backing pages
for the previously shared mapping will still be mapped by process B unless userspace
also ensures process B also unmaps on conversion.

#3 is also a limiter.  E.g. if a guest is primarly backed by 1GiB pages, keeping
the 1GiB mapping is desirable if the guest converts a few KiB of memory to shared,
and possibly even if the guest converts a few MiB of memory.

> > Code is available here if folks want to take a look before any kind of formal
> > posting:
> >
> >         https://github.com/sean-jc/linux.git x86/kvm_gmem_solo
> >
> > [1] https://lore.kernel.org/all/ff5c5b97-acdf-9745-ebe5-c6609dd6322e@google.com
> > [2] https://lore.kernel.org/all/20230418-anfallen-irdisch-6993a61be10b@brauner
> > [3] https://lore.kernel.org/linux-mm/20200522125214.31348-1-kirill.shutemov@linux.intel.com

  parent reply	other threads:[~2023-05-10 21:39 UTC|newest]

Thread overview: 398+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-02  6:13 [PATCH v10 0/9] KVM: mm: fd-based approach for supporting KVM Chao Peng
2022-12-02  6:13 ` [PATCH v10 1/9] mm: Introduce memfd_restricted system call to create restricted user memory Chao Peng
2022-12-06 14:57   ` Fuad Tabba
2022-12-07 13:50     ` Chao Peng
2022-12-13 23:49   ` Huang, Kai
2022-12-19  7:53     ` Chao Peng
2022-12-19  8:48       ` Huang, Kai
2022-12-20  7:22         ` Chao Peng
2022-12-20  8:33           ` Huang, Kai
2022-12-21 13:39             ` Chao Peng
2022-12-22  0:37               ` Huang, Kai
2022-12-23  8:20                 ` Chao Peng
2023-01-23 14:03                 ` Vlastimil Babka
2023-01-23 15:18                   ` Kirill A. Shutemov
2023-02-13 14:23                     ` Vlastimil Babka
2023-01-23 23:01                   ` Huang, Kai
2023-01-23 23:38                     ` Sean Christopherson
2023-01-24  7:51                       ` Vlastimil Babka
2022-12-22 18:15               ` Sean Christopherson
2022-12-23  0:50                 ` Huang, Kai
2022-12-23  8:24                 ` Chao Peng
2023-01-23 15:43                 ` Kirill A. Shutemov
2023-02-13 11:43                   ` Vlastimil Babka
2023-02-13 13:10                   ` Michael Roth
2023-01-13 21:54   ` Sean Christopherson
2023-01-17 12:41     ` Chao Peng
2023-01-17 16:34       ` Sean Christopherson
2023-01-18  8:16         ` Chao Peng
2023-01-18 10:17           ` Isaku Yamahata
2023-02-22  2:07     ` Alexey Kardashevskiy
2023-02-24  5:42       ` Chao Peng
2023-01-30  5:26   ` Ackerley Tng
2023-01-30  6:04     ` Wang, Wei W
2023-02-16  9:51   ` Nikunj A. Dadhania
2023-03-20 19:08     ` Michael Roth
2023-04-13 15:25   ` [PATCH v7 00/14] KVM: mm: fd-based approach for supporting KVM guest private memory Christian Brauner
2023-04-13 22:28     ` Sean Christopherson
2023-04-14 22:38       ` Ackerley Tng
2023-04-14 23:26         ` Sean Christopherson
2023-04-15  0:06           ` Sean Christopherson
2023-04-19  8:29       ` Christian Brauner
2023-04-20  0:49         ` Sean Christopherson
2023-04-20  8:35           ` Christian Brauner
2023-04-13 17:22   ` [PATCH v10 1/9] mm: Introduce memfd_restricted system call to create restricted user memory Ackerley Tng
2022-12-02  6:13 ` [PATCH v10 2/9] KVM: Introduce per-page memory attributes Chao Peng
2022-12-06 13:34   ` Fabiano Rosas
2022-12-07 14:31     ` Chao Peng
2022-12-06 15:07   ` Fuad Tabba
2022-12-07 14:51     ` Chao Peng
2022-12-16 15:09   ` Borislav Petkov
2022-12-19  8:15     ` Chao Peng
2022-12-19 10:17       ` Borislav Petkov
2022-12-20  7:24         ` Chao Peng
2022-12-28  8:28   ` Chenyi Qiang
2023-01-03  1:39     ` Chao Peng
2023-01-03  3:32       ` Wang, Wei W
2023-01-03 23:06         ` Sean Christopherson
2023-01-05  4:39           ` Chao Peng
2023-01-13 22:02   ` Sean Christopherson
2023-01-17  3:21   ` Binbin Wu
2023-01-17 13:30     ` Chao Peng
2023-01-17 17:25       ` Sean Christopherson
2023-02-09  7:25   ` Isaku Yamahata
2023-02-10  0:35     ` Sean Christopherson
2023-02-13 23:53       ` Isaku Yamahata
2023-02-14 18:07         ` Sean Christopherson
2023-05-19 17:32   ` Nicolas Saenz Julienne
2023-05-19 18:23     ` Sean Christopherson
2023-05-19 19:49       ` Nicolas Saenz Julienne
2023-05-19 19:57         ` Sean Christopherson
2023-05-23 18:59       ` Nicolas Saenz Julienne
2022-12-02  6:13 ` [PATCH v10 3/9] KVM: Extend the memslot to support fd-based private memory Chao Peng
2022-12-05  9:03   ` Fuad Tabba
2022-12-06 11:53     ` Chao Peng
2022-12-06 12:39       ` Fuad Tabba
2022-12-07 15:10         ` Chao Peng
2022-12-08  8:37   ` Xiaoyao Li
2022-12-08 11:30     ` Chao Peng
2022-12-13 12:04       ` Xiaoyao Li
2022-12-19  7:50         ` Chao Peng
2022-12-19 14:36   ` Borislav Petkov
2022-12-20  7:43     ` Chao Peng
2022-12-20  9:55       ` Borislav Petkov
2022-12-21 13:42         ` Chao Peng
2023-01-05 11:23   ` Jarkko Sakkinen
2023-01-06  9:40     ` Chao Peng
2023-01-09 19:32       ` Sean Christopherson
2023-01-10  9:14         ` Chao Peng
2023-01-10 22:51           ` Vishal Annapurve
2023-01-13 22:37           ` Sean Christopherson
2023-01-17 12:42             ` Chao Peng
2023-01-20 23:42           ` Jarkko Sakkinen
2023-01-20 23:28         ` Jarkko Sakkinen
2022-12-02  6:13 ` [PATCH v10 4/9] KVM: Add KVM_EXIT_MEMORY_FAULT exit Chao Peng
2022-12-06 15:47   ` Fuad Tabba
2022-12-07 15:11     ` Chao Peng
2023-01-13 23:13   ` Sean Christopherson
2022-12-02  6:13 ` [PATCH v10 5/9] KVM: Use gfn instead of hva for mmu_notifier_retry Chao Peng
2022-12-05  9:23   ` Fuad Tabba
2022-12-06 11:56     ` Chao Peng
2022-12-06 15:48       ` Fuad Tabba
2022-12-09  6:24         ` Chao Peng
2022-12-07  6:34       ` Isaku Yamahata
2022-12-07 15:14         ` Chao Peng
2022-12-02  6:13 ` [PATCH v10 6/9] KVM: Unmap existing mappings when change the memory attributes Chao Peng
2022-12-07  8:13   ` Yuan Yao
2022-12-08 11:20     ` Chao Peng
2022-12-09  5:43       ` Yuan Yao
2022-12-07 17:16   ` Fuad Tabba
2022-12-08 11:13     ` Chao Peng
2022-12-09  8:57       ` Fuad Tabba
2022-12-12  7:22         ` Chao Peng
2022-12-13 23:51   ` Huang, Kai
2022-12-19  7:54     ` Chao Peng
2023-01-13 22:50   ` Sean Christopherson
2022-12-02  6:13 ` [PATCH v10 7/9] KVM: Update lpage info when private/shared memory are mixed Chao Peng
2022-12-05 22:49   ` Isaku Yamahata
2022-12-06 12:02     ` Chao Peng
2022-12-07  6:42       ` Isaku Yamahata
2022-12-08 11:17         ` Chao Peng
2023-01-13 23:12   ` Sean Christopherson
2023-01-13 23:16   ` Sean Christopherson
2023-01-28 13:54     ` Chao Peng
2022-12-02  6:13 ` [PATCH v10 8/9] KVM: Handle page fault for private memory Chao Peng
2022-12-08  2:29   ` Yuan Yao
2022-12-08 11:23     ` Chao Peng
2022-12-09  5:45       ` Yuan Yao
2022-12-09  9:01   ` Fuad Tabba
2022-12-12  7:23     ` Chao Peng
2023-01-13 23:29   ` Sean Christopherson
2022-12-02  6:13 ` [PATCH v10 9/9] KVM: Enable and expose KVM_MEM_PRIVATE Chao Peng
2022-12-09  9:11   ` Fuad Tabba
2023-01-05 20:38   ` Vishal Annapurve
2023-01-06  4:13     ` Chao Peng
2023-01-14  0:01   ` Sean Christopherson
2023-01-17 13:12     ` Chao Peng
2023-01-17 19:35       ` Sean Christopherson
2023-01-18  8:23         ` Chao Peng
2023-01-28 14:00     ` Chao Peng
2023-03-08  0:13       ` Ackerley Tng
2023-03-08  7:40         ` Chao Peng
2023-03-23  0:41           ` Isaku Yamahata
2023-03-24  2:10             ` Chao Peng
2023-03-24  2:29               ` Xiaoyao Li
2023-03-28 10:41                 ` Chao Peng
2023-04-14 21:08                   ` Sean Christopherson
2023-04-18 23:38                     ` Ackerley Tng
2023-04-25 23:01                       ` Sean Christopherson
2023-03-07 19:14   ` Ackerley Tng
2023-03-07 20:27     ` Sean Christopherson
2023-01-14  0:37 ` [PATCH v10 0/9] KVM: mm: fd-based approach for supporting KVM Sean Christopherson
2023-01-16 13:48   ` Kirill A. Shutemov
2023-01-17 13:19   ` Chao Peng
2023-01-17 14:32   ` Fuad Tabba
2023-01-19 11:13   ` Isaku Yamahata
2023-01-19 15:25     ` Sean Christopherson
2023-01-19 22:37       ` Isaku Yamahata
2023-01-24  1:27         ` Sean Christopherson
2023-02-08 12:24           ` Isaku Yamahata
2023-02-13 13:01           ` Michael Roth
2023-02-21 12:11             ` Chao Peng
2023-03-23  1:27               ` Michael Roth
2023-03-24  2:13                 ` Chao Peng
2023-04-12 22:01                 ` Sean Christopherson
2023-04-17 14:37           ` Chao Peng
2023-04-17 15:01             ` Sean Christopherson
2023-01-24 16:08   ` Liam Merwick
2023-01-25  0:20     ` Sean Christopherson
2023-01-25 12:53       ` Kirill A. Shutemov
2023-01-25 16:01         ` Liam Merwick
2023-04-13  1:07         ` Sean Christopherson
2023-04-13 16:04           ` Kirill A. Shutemov
2023-02-16  5:13 ` Mike Rapoport
2023-02-16  9:41   ` David Hildenbrand
2023-02-22 21:53     ` Sean Christopherson
2023-04-17 15:40 ` Rename restrictedmem => guardedmem? (was: Re: [PATCH v10 0/9] KVM: mm: fd-based approach for supporting KVM) Sean Christopherson
2023-04-17 15:48   ` David Hildenbrand
2023-04-17 16:40     ` Sean Christopherson
2023-04-17 17:09       ` David Hildenbrand
2023-04-17 19:16         ` Sean Christopherson
2023-04-18  8:53           ` Fuad Tabba
2023-04-18  9:10           ` David Hildenbrand
2023-04-19  0:47             ` Sean Christopherson
2023-04-19  7:21               ` David Hildenbrand
2023-04-19 15:17                 ` Sean Christopherson
2023-04-19 15:27                   ` David Hildenbrand
2023-04-22  1:33                 ` Sean Christopherson
2023-05-05 19:39                   ` Ackerley Tng
2023-05-06  0:55                     ` Sean Christopherson
2023-05-06  1:17                       ` Vishal Annapurve
2023-05-15 23:46                       ` Sean Christopherson
2023-07-13 22:46                       ` Ackerley Tng
2023-07-14 19:29                         ` Sean Christopherson
2023-07-14 23:09                           ` Vishal Annapurve
2023-07-15  0:30                             ` Sean Christopherson
2023-05-09 12:44                     ` Chao Peng
2023-05-10 17:26                   ` Vishal Annapurve
2023-05-10 20:23                     ` Vishal Annapurve
2023-05-10 21:39                     ` Sean Christopherson [this message]
2023-05-10 23:03                       ` Vishal Annapurve
2023-05-11 20:22                         ` Sean Christopherson
2023-05-19  1:07                           ` Vishal Annapurve
2023-05-12  0:21                   ` Michael Roth
2023-05-12 18:01                     ` Sean Christopherson
2023-05-22 13:50                       ` Michael Roth
2023-05-22 17:09                         ` Sean Christopherson
2023-05-22 23:58                           ` Michael Roth
2023-05-23  0:21                             ` Sean Christopherson
2023-06-06 19:14                   ` Ackerley Tng
2023-06-06 23:25                     ` Sean Christopherson
2023-06-08 17:13                       ` Ackerley Tng
2023-04-17 17:11       ` Ackerley Tng
2023-04-17 18:17         ` Sean Christopherson
2023-04-18 17:01       ` Ackerley Tng
2023-04-23 13:28     ` Jarkko Sakkinen
2023-05-05 20:00       ` David Hildenbrand
2023-05-06  7:44         ` Vlastimil Babka
2023-05-06  9:16           ` David Hildenbrand
2023-04-23 13:14   ` Jarkko Sakkinen
  -- strict thread matches above, loose matches on Subject: below --
2023-03-31 23:50 [RFC PATCH v3 0/2] Providing mount in memfd_restricted() syscall Ackerley Tng
2023-03-31 23:50 ` [RFC PATCH v3 1/2] mm: restrictedmem: Allow userspace to specify mount for memfd_restricted Ackerley Tng
2023-04-03  8:21   ` David Hildenbrand
2023-04-05 22:29     ` Ackerley Tng
2023-04-04  8:25   ` Kirill A. Shutemov
2023-04-05 22:32     ` Ackerley Tng
2023-04-04 13:53   ` Christian Brauner
2023-04-04 14:58     ` Christian Brauner
2023-04-05 21:58       ` Ackerley Tng
2023-04-12  9:59         ` Christian Brauner
2023-04-13 22:53           ` Ackerley Tng
2023-04-13 23:07             ` Sean Christopherson
2023-03-31 23:50 ` [RFC PATCH v3 2/2] selftests: restrictedmem: Check hugepage-ness of shmem file backing restrictedmem fd Ackerley Tng
2023-04-03  8:24   ` David Hildenbrand
2023-04-11  1:35     ` Ackerley Tng
2022-07-06  8:20 [PATCH v7 00/14] KVM: mm: fd-based approach for supporting KVM guest private memory Chao Peng
2022-07-06  8:20 ` [PATCH v7 01/14] mm: Add F_SEAL_AUTO_ALLOCATE seal to memfd Chao Peng
2022-07-21  9:44   ` David Hildenbrand
2022-07-21  9:50     ` David Hildenbrand
2022-07-21 15:05       ` Sean Christopherson
2022-07-25 13:46         ` Chao Peng
2022-07-21 10:27     ` Gupta, Pankaj
2022-07-25 13:54       ` Chao Peng
2022-07-25 14:49         ` Gupta, Pankaj
2022-07-25 13:42     ` Chao Peng
2022-08-05 17:55     ` Paolo Bonzini
2022-08-05 18:06       ` David Hildenbrand
2022-08-10  9:40         ` Chao Peng
2022-08-10  9:38       ` Chao Peng
2022-08-17 23:41       ` Kirill A. Shutemov
2022-08-18  9:09         ` Paolo Bonzini
2022-08-23  7:36         ` David Hildenbrand
2022-08-24 10:20           ` Chao Peng
2022-08-26 15:19   ` Fuad Tabba
2022-08-29 15:18     ` Chao Peng
2022-07-06  8:20 ` [PATCH v7 02/14] selftests/memfd: Add tests for F_SEAL_AUTO_ALLOCATE Chao Peng
2022-08-05 13:11   ` David Hildenbrand
2022-07-06  8:20 ` [PATCH v7 03/14] mm: Introduce memfile_notifier Chao Peng
2022-08-05 13:22   ` David Hildenbrand
2022-08-10  9:22     ` Chao Peng
2022-08-10 10:05       ` David Hildenbrand
2022-08-10 14:38         ` Sean Christopherson
2022-08-11 12:27           ` Quentin Perret
2022-08-11 13:39             ` Chao Peng
2022-07-06  8:20 ` [PATCH v7 04/14] mm/shmem: Support memfile_notifier Chao Peng
2022-07-12 18:02   ` Gupta, Pankaj
2022-07-13  7:44     ` Chao Peng
2022-07-13 10:01       ` Gupta, Pankaj
2022-07-13 23:49         ` Chao Peng
2022-07-14  4:15           ` Gupta, Pankaj
2022-08-05 13:26   ` David Hildenbrand
2022-08-10  9:25     ` Chao Peng
2022-07-06  8:20 ` [PATCH v7 05/14] mm/memfd: Introduce MFD_INACCESSIBLE flag Chao Peng
2022-08-05 13:28   ` David Hildenbrand
2022-08-10  9:37     ` Chao Peng
2022-08-10  9:55       ` David Hildenbrand
2022-08-11 13:17         ` Chao Peng
2022-09-07 16:18     ` Kirill A. Shutemov
2022-07-06  8:20 ` [PATCH v7 06/14] KVM: Rename KVM_PRIVATE_MEM_SLOTS to KVM_INTERNAL_MEM_SLOTS Chao Peng
2022-07-06  8:20 ` [PATCH v7 07/14] KVM: Use gfn instead of hva for mmu_notifier_retry Chao Peng
2022-07-15 11:36   ` Gupta, Pankaj
2022-07-18 13:29     ` Chao Peng
2022-07-18 15:26       ` Sean Christopherson
2022-07-19 14:02         ` Chao Peng
2022-08-04  7:10   ` Isaku Yamahata
2022-08-10  8:19     ` Chao Peng
2022-07-06  8:20 ` [PATCH v7 08/14] KVM: Rename mmu_notifier_* Chao Peng
2022-07-29 19:02   ` Sean Christopherson
2022-08-03 10:13     ` Chao Peng
2022-08-05 19:54     ` Paolo Bonzini
2022-08-10  8:09       ` Chao Peng
2023-05-23  7:19   ` Kautuk Consul
2023-05-23 14:19     ` Sean Christopherson
2023-05-24  6:12       ` Kautuk Consul
2023-05-24 20:16         ` Sean Christopherson
2023-05-24 20:33           ` Peter Zijlstra
2023-05-24 21:39             ` Sean Christopherson
2023-05-25  8:54               ` Peter Zijlstra
2023-05-25  3:52             ` Kautuk Consul
2023-05-24 20:28         ` Peter Zijlstra
2022-07-06  8:20 ` [PATCH v7 09/14] KVM: Extend the memslot to support fd-based private memory Chao Peng
2022-07-29 19:51   ` Sean Christopherson
2022-08-03 10:08     ` Chao Peng
2022-08-03 14:42       ` Sean Christopherson
2022-07-06  8:20 ` [PATCH v7 10/14] KVM: Add KVM_EXIT_MEMORY_FAULT exit Chao Peng
2022-07-06  8:20 ` [PATCH v7 11/14] KVM: Register/unregister the guest private memory regions Chao Peng
2022-07-19  8:00   ` Gupta, Pankaj
2022-07-19 14:08     ` Chao Peng
2022-07-19 14:23       ` Gupta, Pankaj
2022-07-20 15:07         ` Chao Peng
2022-07-20 15:31           ` Gupta, Pankaj
2022-07-20 16:21             ` Sean Christopherson
2022-07-20 17:41               ` Gupta, Pankaj
2022-07-21  7:34               ` Wei Wang
2022-07-21  9:29                 ` Chao Peng
2022-07-21 17:58                   ` Sean Christopherson
2022-07-25 13:04                     ` Chao Peng
2022-07-29 19:54                       ` Sean Christopherson
2022-08-02  0:49                         ` Sean Christopherson
2022-08-02 16:38                           ` Sean Christopherson
2022-08-03  9:48                             ` Chao Peng
2022-08-03 15:51                               ` Sean Christopherson
2022-08-04  7:58                                 ` Chao Peng
2022-07-20 16:44   ` Sean Christopherson
2022-07-21  9:37     ` Chao Peng
2022-08-19 19:37   ` Vishal Annapurve
2022-08-24 10:37     ` Chao Peng
2022-08-26 15:19   ` Fuad Tabba
2022-08-29 15:21     ` Chao Peng
2022-07-06  8:20 ` [PATCH v7 12/14] KVM: Handle page fault for private memory Chao Peng
2022-07-29 20:58   ` Sean Christopherson
2022-08-03  9:52     ` Chao Peng
2022-07-06  8:20 ` [PATCH v7 13/14] KVM: Enable and expose KVM_MEM_PRIVATE Chao Peng
2022-07-19  9:55   ` Gupta, Pankaj
2022-07-19 14:12     ` Chao Peng
2022-07-06  8:20 ` [PATCH v7 14/14] memfd_create.2: Describe MFD_INACCESSIBLE flag Chao Peng
2022-08-01 14:40   ` Dave Hansen
2022-08-03  9:53     ` Chao Peng
2022-07-13  3:58 ` [PATCH v7 00/14] KVM: mm: fd-based approach for supporting KVM guest private memory Gupta, Pankaj
2022-07-13  7:57   ` Chao Peng
2022-07-13 10:35     ` Gupta, Pankaj
2022-07-13 23:59       ` Chao Peng
2022-07-14  4:39         ` Gupta, Pankaj
2022-07-14  5:06           ` Gupta, Pankaj
2022-07-14  4:29       ` Andy Lutomirski
2022-07-14  5:13         ` Gupta, Pankaj
2022-08-11 10:02 ` Nikunj A. Dadhania
2022-08-11 11:30   ` Gupta, Pankaj
2022-08-11 13:32     ` Chao Peng
2022-08-11 17:28       ` Nikunj A. Dadhania
2022-08-12  3:22       ` Nikunj A. Dadhania
2022-08-11 17:18     ` Nikunj A. Dadhania
2022-08-11 23:02       ` Gupta, Pankaj
2022-08-12  6:02         ` Gupta, Pankaj
2022-08-12  7:18           ` Gupta, Pankaj
2022-08-12  8:48             ` Nikunj A. Dadhania
2022-08-12  9:33               ` Gupta, Pankaj
2022-08-15 13:04               ` Chao Peng
2022-08-16  4:28                 ` Nikunj A. Dadhania
2022-08-16 11:33                 ` Gupta, Pankaj
2022-08-16 12:24                   ` Kirill A . Shutemov
2022-08-16 13:03                     ` Gupta, Pankaj
2022-08-16 15:38                       ` Sean Christopherson
2022-08-17 15:27                         ` Michael Roth
2022-08-23  1:25                           ` Isaku Yamahata
2022-08-23 17:41                         ` Gupta, Pankaj
2022-08-18  5:40 ` Hugh Dickins
2022-08-18 13:24   ` Kirill A . Shutemov
2022-08-19  0:20     ` Sean Christopherson
2022-08-19  3:38       ` Hugh Dickins
2022-08-19 22:53         ` Sean Christopherson
2022-08-23  7:55         ` David Hildenbrand
2022-08-23 16:05           ` Sean Christopherson
2022-08-24  9:41             ` Chao Peng
2022-09-09  4:55               ` Andy Lutomirski
2022-08-19  3:00     ` Hugh Dickins
2022-08-20  0:27       ` Kirill A. Shutemov
2022-08-21  5:15         ` Hugh Dickins
2022-08-31 14:24           ` Kirill A . Shutemov
2022-09-02 10:27             ` Chao Peng
2022-09-02 12:30               ` Kirill A . Shutemov
2022-09-08  1:10             ` Kirill A. Shutemov
2022-09-13  9:44               ` Sean Christopherson
2022-09-13 13:28                 ` Kirill A. Shutemov
2022-09-13 14:53                   ` Sean Christopherson
2022-09-13 16:00                     ` Kirill A. Shutemov
2022-09-13 16:12                       ` Sean Christopherson
2022-09-09  4:48         ` Andy Lutomirski
2022-09-09 14:32           ` Kirill A . Shutemov
2022-09-09 19:11             ` Andy Lutomirski
2022-09-09 23:02               ` Kirill A . Shutemov
2022-08-21 10:27       ` Matthew Wilcox
2022-08-24 10:27         ` Chao Peng
2022-09-09  4:44     ` Andy Lutomirski
2022-08-26 15:19 ` Fuad Tabba
2022-08-29 15:17   ` Chao Peng
2022-08-31  9:12     ` Fuad Tabba
2022-09-02 10:19       ` Chao Peng
2022-09-09 15:35 ` Michael Roth

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