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| author | Ken Hofsass <hofsass@google.com> | 2018-02-01 03:03:35 +0300 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2018-03-06 20:40:43 +0300 |
| commit | 7b7e39522a61f402d41dd9a67f3fa2133ef9d4e8 (patch) | |
| tree | 2416acd62546483498495af33f6561ed00986b87 | |
| parent | faeb7833eee0d6afe0ecb6bdfa6042556c2c352e (diff) | |
| download | linux-7b7e39522a61f402d41dd9a67f3fa2133ef9d4e8.tar.xz | |
KVM: x86: add SYNC_REGS_SIZE_BYTES #define.
Replace hardcoded padding size value for struct kvm_sync_regs
with #define SYNC_REGS_SIZE_BYTES.
Also update the value specified in api.txt from outdated hardcoded
value to SYNC_REGS_SIZE_BYTES.
Signed-off-by: Ken Hofsass <hofsass@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 2 | ||||
| -rw-r--r-- | include/uapi/linux/kvm.h | 6 |
2 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index db992e036bdf..55867a2a460c 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -3905,7 +3905,7 @@ in userspace. __u64 kvm_dirty_regs; union { struct kvm_sync_regs regs; - char padding[1024]; + char padding[SYNC_REGS_SIZE_BYTES]; } s; If KVM_CAP_SYNC_REGS is defined, these fields allow userspace to access diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 2d2d926113ba..088c2c92db55 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -396,6 +396,10 @@ struct kvm_run { char padding[256]; }; + /* 2048 is the size of the char array used to bound/pad the size + * of the union that holds sync regs. + */ + #define SYNC_REGS_SIZE_BYTES 2048 /* * shared registers between kvm and userspace. * kvm_valid_regs specifies the register classes set by the host @@ -407,7 +411,7 @@ struct kvm_run { __u64 kvm_dirty_regs; union { struct kvm_sync_regs regs; - char padding[2048]; + char padding[SYNC_REGS_SIZE_BYTES]; } s; }; |