From: David Hildenbrand <david@redhat.com>
To: Fuad Tabba <tabba@google.com>,
kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-mm@kvack.org
Cc: pbonzini@redhat.com, chenhuacai@kernel.org, mpe@ellerman.id.au,
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Subject: Re: [RFC PATCH v1 3/9] KVM: guest_memfd: Add KVM capability to check if guest_memfd is host mappable
Date: Thu, 23 Jan 2025 12:42:53 +0100 [thread overview]
Message-ID: <b3568243-5154-424b-9114-9c28588be588@redhat.com> (raw)
In-Reply-To: <20250122152738.1173160-4-tabba@google.com>
On 22.01.25 16:27, Fuad Tabba wrote:
> Add the KVM capability KVM_CAP_GUEST_MEMFD_MAPPABLE, which is
> true if mapping guest memory is supported by the host.
>
> Signed-off-by: Fuad Tabba <tabba@google.com>
> ---
> include/uapi/linux/kvm.h | 1 +
> virt/kvm/kvm_main.c | 4 ++++
> 2 files changed, 5 insertions(+)
>
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 502ea63b5d2e..021f8ef9979b 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -933,6 +933,7 @@ struct kvm_enable_cap {
> #define KVM_CAP_PRE_FAULT_MEMORY 236
> #define KVM_CAP_X86_APIC_BUS_CYCLES_NS 237
> #define KVM_CAP_X86_GUEST_MODE 238
> +#define KVM_CAP_GUEST_MEMFD_MAPPABLE 239
Maybe similarly consider calling this something like
KVM_CAP_GUEST_MEMFD_SHARED_MEM
No strong opinion on this one, though.
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2025-01-23 11:43 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
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 [this message]
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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