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Add class property to configure KVM device node to use

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This allows passing the KVM device node to use as a file
descriptor via /dev/fdset/XX. Passing the device node to
use as a file descriptor allows running qemu unprivileged
even when the user running qemu is not in the kvm group
on distributions where access to /dev/kvm is gated behind
membership of the kvm group (as long as the process invoking
qemu is able to open /dev/kvm and passes the file descriptor
to qemu).

Signed-off-by: Daan De Meyer <daan.j.demeyer@gmail.com>
Message-ID: <20231021134015.1119597-1-daan.j.demeyer@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Daan De Meyer 2023-10-21 15:40:15 +02:00 • committed by Paolo Bonzini
parent 435262605f
commit aef158b093
3 changed files with 32 additions and 2 deletions
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1
include/sysemu/kvm_int.h
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@ -120,6 +120,7 @@ struct KVMState
uint32_t xen_caps;
uint16_t xen_gnttab_max_frames;
uint16_t xen_evtchn_max_pirq;
char *device;
};
void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,