diff options
| -rw-r--r-- | arch/s390/kernel/diag.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c index d8d97f970af4..8dee9aa0ec95 100644 --- a/arch/s390/kernel/diag.c +++ b/arch/s390/kernel/diag.c @@ -157,10 +157,30 @@ void diag0c(struct hypfs_diag0c_entry *data) /* * Diagnose 14: Input spool file manipulation + * + * The subcode parameter determines the type of the first parameter rx. + * Currently used are the following 3 subcommands: + * 0x0: Read the Next Spool File Buffer (Data Record) + * 0x28: Position a Spool File to the Designated Record + * 0xfff: Retrieve Next File Descriptor + * + * For subcommands 0x0 and 0xfff, the value of the first parameter is + * a virtual address of a memory buffer and needs virtual to physical + * address translation. For other subcommands the rx parameter is not + * a virtual address. */ int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode) { diag_stat_inc(DIAG_STAT_X014); + switch (subcode) { + case 0x0: + case 0xfff: + rx = virt_to_phys((void *)rx); + break; + default: + /* Do nothing */ + break; + } return diag_amode31_ops.diag14(rx, ry1, subcode); } EXPORT_SYMBOL(diag14); |