diff options
Diffstat (limited to 'arch/x86_64')
| -rw-r--r-- | arch/x86_64/boot/video.S | 19 | ||||
| -rw-r--r-- | arch/x86_64/kernel/pmtimer.c | 2 | ||||
| -rw-r--r-- | arch/x86_64/kernel/setup.c | 1 | ||||
| -rw-r--r-- | arch/x86_64/mm/fault.c | 39 |
4 files changed, 58 insertions, 3 deletions
diff --git a/arch/x86_64/boot/video.S b/arch/x86_64/boot/video.S index 32327bb37af..2aa565c136e 100644 --- a/arch/x86_64/boot/video.S +++ b/arch/x86_64/boot/video.S @@ -1929,6 +1929,7 @@ skip10: movb %ah, %al ret store_edid: +#ifdef CONFIG_FIRMWARE_EDID pushw %es # just save all registers pushw %ax pushw %bx @@ -1946,6 +1947,22 @@ store_edid: rep stosl + pushw %es # save ES + xorw %di, %di # Report Capability + pushw %di + popw %es # ES:DI must be 0:0 + movw $0x4f15, %ax + xorw %bx, %bx + xorw %cx, %cx + int $0x10 + popw %es # restore ES + + cmpb $0x00, %ah # call successful + jne no_edid + + cmpb $0x4f, %al # function supported + jne no_edid + movw $0x4f15, %ax # do VBE/DDC movw $0x01, %bx movw $0x00, %cx @@ -1953,12 +1970,14 @@ store_edid: movw $0x140, %di int $0x10 +no_edid: popw %di # restore all registers popw %dx popw %cx popw %bx popw %ax popw %es +#endif ret # VIDEO_SELECT-only variables diff --git a/arch/x86_64/kernel/pmtimer.c b/arch/x86_64/kernel/pmtimer.c index bf421ed2680..7554458dc9c 100644 --- a/arch/x86_64/kernel/pmtimer.c +++ b/arch/x86_64/kernel/pmtimer.c @@ -27,7 +27,7 @@ /* The I/O port the PMTMR resides at. * The location is detected during setup_arch(), * in arch/i386/kernel/acpi/boot.c */ -u32 pmtmr_ioport; +u32 pmtmr_ioport __read_mostly; /* value of the Power timer at last timer interrupt */ static u32 offset_delay; diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index 594642a6c03..1129918ede8 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -107,6 +107,7 @@ struct sys_desc_table_struct { }; struct edid_info edid_info; +EXPORT_SYMBOL_GPL(edid_info); struct e820map e820; extern int root_mountflags; diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c index 4968a71df4a..08dc696f54e 100644 --- a/arch/x86_64/mm/fault.c +++ b/arch/x86_64/mm/fault.c @@ -41,6 +41,41 @@ #define PF_RSVD (1<<3) #define PF_INSTR (1<<4) +#ifdef CONFIG_KPROBES +ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain); + +/* Hook to register for page fault notifications */ +int register_page_fault_notifier(struct notifier_block *nb) +{ + vmalloc_sync_all(); + return atomic_notifier_chain_register(¬ify_page_fault_chain, nb); +} + +int unregister_page_fault_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb); +} + +static inline int notify_page_fault(enum die_val val, const char *str, + struct pt_regs *regs, long err, int trap, int sig) +{ + struct die_args args = { + .regs = regs, + .str = str, + .err = err, + .trapnr = trap, + .signr = sig + }; + return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args); +} +#else +static inline int notify_page_fault(enum die_val val, const char *str, + struct pt_regs *regs, long err, int trap, int sig) +{ + return NOTIFY_DONE; +} +#endif + void bust_spinlocks(int yes) { int loglevel_save = console_loglevel; @@ -348,7 +383,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, if (vmalloc_fault(address) >= 0) return; } - if (notify_die(DIE_PAGE_FAULT, "page fault", regs, error_code, 14, + if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14, SIGSEGV) == NOTIFY_STOP) return; /* @@ -358,7 +393,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, goto bad_area_nosemaphore; } - if (notify_die(DIE_PAGE_FAULT, "page fault", regs, error_code, 14, + if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14, SIGSEGV) == NOTIFY_STOP) return; |