Re: [RFC PATCH v11 12/29] KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory
From: Fuad Tabba <hidden>
Date: 2023-07-27 10:40:49
Also in:
kvm, kvm-riscv, kvmarm, linux-arm-kernel, linux-fsdevel, linux-mips, linux-mm, linux-riscv, linux-security-module, lkml
Hi Sean, <snip> ...
quoted hunk ↗ jump to hunk
@@ -5134,6 +5167,16 @@ static long kvm_vm_ioctl(struct file *filp, case KVM_GET_STATS_FD: r = kvm_vm_ioctl_get_stats_fd(kvm); break; + case KVM_CREATE_GUEST_MEMFD: { + struct kvm_create_guest_memfd guest_memfd; + + r = -EFAULT; + if (copy_from_user(&guest_memfd, argp, sizeof(guest_memfd))) + goto out; + + r = kvm_gmem_create(kvm, &guest_memfd); + break; + }
I'm thinking line of sight here, by having this as a vm ioctl (rather than a system iocl), would it complicate making it possible in the future to share/donate memory between VMs? Cheers, /fuad