From: David Hildenbrand <david@redhat.com>
To: Fuad Tabba <tabba@google.com>
Cc: kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-mm@kvack.org, pbonzini@redhat.com, chenhuacai@kernel.org,
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Subject: Re: [RFC PATCH v1 2/9] KVM: guest_memfd: Add guest_memfd support to kvm_(read|/write)_guest_page()
Date: Thu, 23 Jan 2025 15:15:34 +0100 [thread overview]
Message-ID: <12286d1d-7671-4c0f-bede-53524ed94f0e@redhat.com> (raw)
In-Reply-To: <CA+EHjTzZoGuUcZTNUzx2e3PNOOEtOJT5rUEhSSmYQ-kcoZQiYQ@mail.gmail.com>
>>
>> One interesting question is: when would you want shared memory in
>> guest_memfd and *not* provide it as part of the same memslot.
>>
>
> My original thinking wasn't that we wouldn't _want_ to, rather that we
> don't _need_ to. I mistakenly thought that it would simplify things,
> but, especially after this discussion, I now realize that it makes
> things more complicated instead.
Right, and it's not off the table: we could always add support for this
"no mmaped shared guest_memfd" memory later if there is good reason to
have it.
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2025-01-23 14:15 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-22 15:27 [RFC PATCH v1 0/9] KVM: Mapping of guest_memfd at the host and a software protected VM type Fuad Tabba
2025-01-22 15:27 ` [RFC PATCH v1 1/9] KVM: guest_memfd: Allow host to mmap guest_memfd() pages Fuad Tabba
2025-01-22 22:06 ` David Hildenbrand
2025-01-23 9:44 ` Fuad Tabba
2025-01-23 10:27 ` David Hildenbrand
2025-01-23 11:02 ` Fuad Tabba
2025-01-22 15:27 ` [RFC PATCH v1 2/9] KVM: guest_memfd: Add guest_memfd support to kvm_(read|/write)_guest_page() Fuad Tabba
2025-01-22 22:10 ` David Hildenbrand
2025-01-23 9:48 ` Fuad Tabba
2025-01-23 11:39 ` David Hildenbrand
2025-01-23 11:57 ` Patrick Roy
2025-01-23 12:28 ` Fuad Tabba
2025-01-23 13:57 ` Patrick Roy
2025-01-23 14:21 ` David Hildenbrand
2025-01-23 14:25 ` Fuad Tabba
2025-01-23 14:18 ` David Hildenbrand
2025-01-23 15:22 ` Patrick Roy
2025-01-24 14:44 ` David Hildenbrand
2025-01-23 12:16 ` Fuad Tabba
2025-01-23 14:15 ` David Hildenbrand [this message]
2025-01-22 15:27 ` [RFC PATCH v1 3/9] KVM: guest_memfd: Add KVM capability to check if guest_memfd is host mappable Fuad Tabba
2025-01-23 11:42 ` David Hildenbrand
2025-01-23 11:46 ` Fuad Tabba
2025-01-22 15:27 ` [RFC PATCH v1 4/9] KVM: arm64: Skip VMA checks for slots without userspace address Fuad Tabba
2025-01-22 15:27 ` [RFC PATCH v1 5/9] KVM: arm64: Refactor user_mem_abort() calculation of force_pte Fuad Tabba
2025-01-22 15:27 ` [RFC PATCH v1 6/9] KVM: arm64: Handle guest_memfd()-backed guest page faults Fuad Tabba
2025-01-22 15:27 ` [RFC PATCH v1 7/9] KVM: arm64: Introduce KVM_VM_TYPE_ARM_SW_PROTECTED machine type Fuad Tabba
2025-01-22 15:27 ` [RFC PATCH v1 8/9] KVM: guest_memfd: selftests: guest_memfd mmap() test when mapping is allowed Fuad Tabba
2025-01-22 15:27 ` [RFC PATCH v1 9/9] KVM: arm64: Enable mapping guest_memfd in arm64 Fuad Tabba
2025-01-22 15:35 ` [RFC PATCH v1 0/9] KVM: Mapping of guest_memfd at the host and a software protected VM type David Hildenbrand
2025-01-22 15:41 ` David Hildenbrand
2025-01-22 17:16 ` Fuad Tabba
2025-01-22 21:42 ` David Hildenbrand
2025-01-23 9:09 ` Fuad Tabba
2025-01-23 9:14 ` David Hildenbrand
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