diff options
Diffstat (limited to 'Documentation/userspace-api')
| -rw-r--r-- | Documentation/userspace-api/ioctl/ioctl-number.rst | 1 | ||||
| -rw-r--r-- | Documentation/userspace-api/seccomp_filter.rst | 2 | ||||
| -rw-r--r-- | Documentation/userspace-api/spec_ctrl.rst | 8 |
3 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst index 1409e40e6345..b7070d76f076 100644 --- a/Documentation/userspace-api/ioctl/ioctl-number.rst +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst @@ -160,7 +160,6 @@ Code Seq# Include File Comments 'K' all linux/kd.h 'L' 00-1F linux/loop.h conflict! 'L' 10-1F drivers/scsi/mpt3sas/mpt3sas_ctl.h conflict! -'L' 20-2F linux/lightnvm.h 'L' E0-FF linux/ppdd.h encrypted disk device driver <http://linux01.gwdg.de/~alatham/ppdd.html> 'M' all linux/soundcard.h conflict! diff --git a/Documentation/userspace-api/seccomp_filter.rst b/Documentation/userspace-api/seccomp_filter.rst index d61219889e49..539e9d4a4860 100644 --- a/Documentation/userspace-api/seccomp_filter.rst +++ b/Documentation/userspace-api/seccomp_filter.rst @@ -263,7 +263,7 @@ Userspace can also add file descriptors to the notifying process via ``ioctl(SECCOMP_IOCTL_NOTIF_ADDFD)``. The ``id`` member of ``struct seccomp_notif_addfd`` should be the same ``id`` as in ``struct seccomp_notif``. The ``newfd_flags`` flag may be used to set flags -like O_EXEC on the file descriptor in the notifying process. If the supervisor +like O_CLOEXEC on the file descriptor in the notifying process. If the supervisor wants to inject the file descriptor with a specific number, the ``SECCOMP_ADDFD_FLAG_SETFD`` flag can be used, and set the ``newfd`` member to the specific number to use. If that file descriptor is already open in the diff --git a/Documentation/userspace-api/spec_ctrl.rst b/Documentation/userspace-api/spec_ctrl.rst index 7ddd8f667459..5e8ed9eef9aa 100644 --- a/Documentation/userspace-api/spec_ctrl.rst +++ b/Documentation/userspace-api/spec_ctrl.rst @@ -106,3 +106,11 @@ Speculation misfeature controls * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_ENABLE, 0, 0); * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_DISABLE, 0, 0); * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_FORCE_DISABLE, 0, 0); + +- PR_SPEC_L1D_FLUSH: Flush L1D Cache on context switch out of the task + (works only when tasks run on non SMT cores) + + Invocations: + * prctl(PR_GET_SPECULATION_CTRL, PR_SPEC_L1D_FLUSH, 0, 0, 0); + * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_L1D_FLUSH, PR_SPEC_ENABLE, 0, 0); + * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_L1D_FLUSH, PR_SPEC_DISABLE, 0, 0); |