proc: provide details on indirect branch speculation

[sfrench/cifs-2.6.git] / fs / proc / array.c

diff --git a/fs/proc/array.c b/fs/proc/array.c
index a23c3e220a5ffbdd317281800919f04681c01505..bb87e4d89cd8fc4e95c6bc277933ea2edddd3cf1 100644 (file)
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -369,6 +369,34 @@ static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
                seq_puts(m, "vulnerable");
                break;
        }
+
+       seq_puts(m, "\nSpeculationIndirectBranch:\t");
+       switch (arch_prctl_spec_ctrl_get(p, PR_SPEC_INDIRECT_BRANCH)) {
+       case -EINVAL:
+               seq_puts(m, "unsupported");
+               break;
+       case PR_SPEC_NOT_AFFECTED:
+               seq_puts(m, "not affected");
+               break;
+       case PR_SPEC_PRCTL | PR_SPEC_FORCE_DISABLE:
+               seq_puts(m, "conditional force disabled");
+               break;
+       case PR_SPEC_PRCTL | PR_SPEC_DISABLE:
+               seq_puts(m, "conditional disabled");
+               break;
+       case PR_SPEC_PRCTL | PR_SPEC_ENABLE:
+               seq_puts(m, "conditional enabled");
+               break;
+       case PR_SPEC_ENABLE:
+               seq_puts(m, "always enabled");
+               break;
+       case PR_SPEC_DISABLE:
+               seq_puts(m, "always disabled");
+               break;
+       default:
+               seq_puts(m, "unknown");
+               break;
+       }
        seq_putc(m, '\n');
 }