linux-kernel - [PATCH v1] KVM: x86: add KVM_CAP_DEVICE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 15 Dec 2022 19:52:07 +0800
From:   Wei Wang <wei.w.wang@...el.com>
To:     pbonzini@...hat.com, seanjc@...gle.com
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wei Wang <wei.w.wang@...el.com>
Subject: [PATCH v1] KVM: x86: add KVM_CAP_DEVICE_CTRL

KVM_CAP_DEVICE_CTRL allows userspace to create emulated device in KVM.
For example, userspace VFIO implementation needs to create a kvm_device
(i.e. KVM_DEV_TYPE_VFIO) on x86. So add the cap to allow userspace for
such use cases.

Signed-off-by: Wei Wang <wei.w.wang@...el.com>
---
 arch/x86/kvm/x86.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 69227f77b201..1cdc4469652c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4410,6 +4410,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_VAPIC:
 	case KVM_CAP_ENABLE_CAP:
 	case KVM_CAP_VM_DISABLE_NX_HUGE_PAGES:
+	case KVM_CAP_DEVICE_CTRL:
 		r = 1;
 		break;
 	case KVM_CAP_EXIT_HYPERCALL:
-- 
2.32.0