diff options
| author | David Howells <dhowells@redhat.com> | 2006-12-05 17:01:28 +0000 |
|---|---|---|
| committer | David Howells <dhowells@warthog.cambridge.redhat.com> | 2006-12-05 17:01:28 +0000 |
| commit | 9db73724453a9350e1c22dbe732d427e2939a5c9 (patch) | |
| tree | 15e3ead6413ae97398a54292acc199bee0864d42 /arch/s390/mm/fault.c | |
| parent | 4c1ac1b49122b805adfa4efc620592f68dccf5db (diff) | |
| parent | e62438630ca37539c8cc1553710bbfaa3cf960a7 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
drivers/ata/libata-scsi.c
include/linux/libata.h
Futher merge of Linus's head and compilation fixups.
Signed-Off-By: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/s390/mm/fault.c')
| -rw-r--r-- | arch/s390/mm/fault.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 1c323bbfda9..cd85e34d870 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -31,6 +31,7 @@ #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/kdebug.h> +#include <asm/s390_ext.h> #ifndef CONFIG_64BIT #define __FAIL_ADDR_MASK 0x7ffff000 @@ -394,6 +395,7 @@ void do_dat_exception(struct pt_regs *regs, unsigned long error_code) /* * 'pfault' pseudo page faults routines. */ +static ext_int_info_t ext_int_pfault; static int pfault_disable = 0; static int __init nopfault(char *str) @@ -422,7 +424,7 @@ int pfault_init(void) __PF_RES_FIELD }; int rc; - if (pfault_disable) + if (!MACHINE_IS_VM || pfault_disable) return -1; asm volatile( " diag %1,%0,0x258\n" @@ -440,7 +442,7 @@ void pfault_fini(void) pfault_refbk_t refbk = { 0x258, 1, 5, 2, 0ULL, 0ULL, 0ULL, 0ULL }; - if (pfault_disable) + if (!MACHINE_IS_VM || pfault_disable) return; __ctl_clear_bit(0,9); asm volatile( @@ -500,5 +502,25 @@ pfault_interrupt(__u16 error_code) set_tsk_need_resched(tsk); } } -#endif +void __init pfault_irq_init(void) +{ + if (!MACHINE_IS_VM) + return; + + /* + * Try to get pfault pseudo page faults going. + */ + if (register_early_external_interrupt(0x2603, pfault_interrupt, + &ext_int_pfault) != 0) + panic("Couldn't request external interrupt 0x2603"); + + if (pfault_init() == 0) + return; + + /* Tough luck, no pfault. */ + pfault_disable = 1; + unregister_early_external_interrupt(0x2603, pfault_interrupt, + &ext_int_pfault); +} +#endif |