Re: [PATCH v18 064/121] KVM: TDX: Create initial guest memory

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



+Vipin Sharma

On Wed, Jan 31, 2024 at 4:21 PM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
> On Mon, Jan 22, 2024, isaku.yamahata@xxxxxxxxx wrote:
>
> The real reason for this drive-by pseudo-review is that I am hoping/wishing we
> can turn this into a generic KVM ioctl() to allow userspace to pre-map guest
> memory[*].
>
> If we're going to carry non-trivial code, we might as well squeeze as much use
> out of it as we can.
>
> Beyond wanting to shove this into KVM_MEMORY_ENCRYPT_OP, is there any reason why
> this is a VM ioctl() and not a vCPU ioctl()?  Very roughly, couldn't we use a
> struct like this as input to a vCPU ioctl() that maps memory, and optionally
> initializes memory from @source?
>
>         struct kvm_memory_mapping {
>                 __u64 base_gfn;
>                 __u64 nr_pages;
>                 __u64 flags;
>                 __u64 source;
>         }
>
> TDX would need to do special things for copying the source, but beyond that most
> of the code in this function is generic.
>
> [*] https://lore.kernel.org/all/65262e67-7885-971a-896d-ad9c0a760907@xxxxxxxxx

We would also be interested in such an API to reduce the guest
performance impact of intra-host migration.





[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux