diff options
| author | Christoph Schlameuss <schlameuss@linux.ibm.com> | 2024-06-24 11:59:02 +0200 |
|---|---|---|
| committer | Janosch Frank <frankja@linux.ibm.com> | 2024-07-04 09:07:24 +0200 |
| commit | 7816e58967d0e6cadce05c8540b47ed027dc2499 (patch) | |
| tree | c4de39745e80e7573fda393ee6c8b639726be169 /tools/perf | |
| parent | 33a729a1770b5e03b9dbc7ecb065ae7997b7544d (diff) | |
kvm: s390: Reject memory region operations for ucontrol VMs
This change rejects the KVM_SET_USER_MEMORY_REGION and
KVM_SET_USER_MEMORY_REGION2 ioctls when called on a ucontrol VM.
This is necessary since ucontrol VMs have kvm->arch.gmap set to 0 and
would thus result in a null pointer dereference further in.
Memory management needs to be performed in userspace and using the
ioctls KVM_S390_UCAS_MAP and KVM_S390_UCAS_UNMAP.
Also improve s390 specific documentation for KVM_SET_USER_MEMORY_REGION
and KVM_SET_USER_MEMORY_REGION2.
Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Fixes: 27e0393f15fc ("KVM: s390: ucontrol: per vcpu address spaces")
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20240624095902.29375-1-schlameuss@linux.ibm.com
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
[frankja@linux.ibm.com: commit message spelling fix, subject prefix fix]
Message-ID: <20240624095902.29375-1-schlameuss@linux.ibm.com>
Diffstat (limited to 'tools/perf')
0 files changed, 0 insertions, 0 deletions