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| author |   Thomas Huth <thuth@redhat.com> | 2023-02-08 15:01:02 +0100 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2023-03-16 10:18:06 -0400 |
| commit | c5edd753a0bd6243a597f5199c227a50457ee179 (patch) | |
| tree | 97ac32a01375357a35638ee6e6d701cb430be073 /include/uapi/linux/kvm.h | |
| parent | KVM: s390: Use "int" as return type for kvm_s390_get/set_skeys() (diff) | |
| download | wireguard-linux-c5edd753a0bd6243a597f5199c227a50457ee179.tar.xz wireguard-linux-c5edd753a0bd6243a597f5199c227a50457ee179.zip | |
KVM: x86: Remove the KVM_GET_NR_MMU_PAGES ioctl
The KVM_GET_NR_MMU_PAGES ioctl is quite questionable on 64-bit hosts
since it fails to return the full 64 bits of the value that can be
set with the corresponding KVM_SET_NR_MMU_PAGES call. Its "long" return
value is truncated into an "int" in the kvm_arch_vm_ioctl() function.
Since this ioctl also never has been used by userspace applications
(QEMU, Google's internal VMM, kvmtool and CrosVM have been checked),
it's likely the best if we remove this badly designed ioctl before
anybody really tries to use it.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230208140105.655814-4-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/uapi/linux/kvm.h')
| -rw-r--r-- | include/uapi/linux/kvm.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index d77aef872a0a..4003a166328c 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1451,7 +1451,7 @@ struct kvm_vfio_spapr_tce { #define KVM_CREATE_VCPU _IO(KVMIO, 0x41) #define KVM_GET_DIRTY_LOG _IOW(KVMIO, 0x42, struct kvm_dirty_log) #define KVM_SET_NR_MMU_PAGES _IO(KVMIO, 0x44) -#define KVM_GET_NR_MMU_PAGES _IO(KVMIO, 0x45) +#define KVM_GET_NR_MMU_PAGES _IO(KVMIO, 0x45) /* deprecated */ #define KVM_SET_USER_MEMORY_REGION _IOW(KVMIO, 0x46, \ struct kvm_userspace_memory_region) #define KVM_SET_TSS_ADDR _IO(KVMIO, 0x47) |