Andi Kleen 2aae950b21 x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu ... This implements new vDSO for x86-64. The concept is similar to the existing vDSOs on i386 and PPC. x86-64 has had static vsyscalls before, but these are not flexible enough anymore. A vDSO is a ELF shared library supplied by the kernel that is mapped into user address space. The vDSO mapping is randomized for each process for security reasons. Doing this was needed for clock_gettime, because clock_gettime always needs a syscall fallback and having one at a fixed address would have made buffer overflow exploits too easy to write. The vdso can be disabled with vdso=0 It currently includes a new gettimeofday implemention and optimized clock_gettime(). The gettimeofday implementation is slightly faster than the one in the old vsyscall. clock_gettime is significantly faster than the syscall for CLOCK_MONOTONIC and CLOCK_REALTIME. The new calls are generally faster than the old vsyscall. Advantages over the old x86-64 vsyscalls: - Extensible - Randomized - Cleaner - Easier to virtualize (the old static address range previously causes overhead e.g. for Xen because it has to create special page tables for it) Weak points: - glibc support still to be written The VM interface is partly based on Ingo Molnar's i386 version. Includes compile fix from Joachim Deguara Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-07-21 18:37:08 -07:00
..
8253pit.h
a.out.h	arch: personality independent stack top	2007-07-19 10:04:45 -07:00
acpi.h	ACPICA: Allow ACPI id to be u32 instead of u8.	2007-02-02 21:14:31 -05:00
agp.h	[AGPGART] Move [un]map_page_into_agp into asm/agp.h	2007-04-26 14:22:50 -04:00
alternative-asm.i
alternative.h	Unify the CPU features vectors between i386 and x86-64	2007-07-12 10:55:54 -07:00
apic.h	[PATCH] x86-64: safe_apic_wait_icr_idle - x86_64	2007-05-02 19:27:17 +02:00
apicdef.h
atomic.h	x86: create asm/cmpxchg.h	2007-05-08 11:15:20 -07:00
auxvec.h	x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu	2007-07-21 18:37:08 -07:00
bitops.h	[PATCH] x86-64: Fix wrong gcc check in bitops.h	2007-02-13 13:26:25 +01:00
boot.h	Make struct boot_params a real structure, and remove obsolete fields	2007-07-12 10:55:54 -07:00
bootparam.h	Make struct boot_params a real structure, and remove obsolete fields	2007-07-12 10:55:54 -07:00
bootsetup.h	[PATCH] Dynamic kernel command-line: x86_64	2007-02-12 09:48:39 -08:00
bug.h	[PATCH] Generic BUG for x86-64	2006-12-08 08:28:39 -08:00
bugs.h	[PATCH] x86-64: Clean up asm-x86_64/bugs.h	2007-05-02 19:27:12 +02:00
byteorder.h
cache.h
cacheflush.h	[PATCH] Optimize D-cache alias handling on fork	2006-12-13 09:27:08 -08:00
calgary.h	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
calling.h
checksum.h
cmpxchg.h	x86: create asm/cmpxchg.h	2007-05-08 11:15:20 -07:00
compat.h	Introduce compat_u64 and compat_s64 types	2007-07-16 09:05:48 -07:00
cpu.h
cpufeature.h	Unify the CPU features vectors between i386 and x86-64	2007-07-12 10:55:54 -07:00
cputime.h
current.h
debugreg.h
delay.h
desc_defs.h
desc.h	[PATCH] x86-64: Introduce load_TLS to the "for" loop.	2007-05-02 19:27:09 +02:00
device.h
div64.h
dma-mapping.h	[PATCH] x86-64: dma_ops as const	2007-05-02 19:27:06 +02:00
dma.h
dmi.h
dwarf2.h
e820.h	Make definitions for struct e820entry and struct e820map consistent	2007-07-12 10:55:54 -07:00
edac.h
elf.h	x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu	2007-07-21 18:37:08 -07:00
emergency-restart.h
errno.h
fb.h	fbdev: detect primary display device	2007-07-17 10:23:11 -07:00
fcntl.h
fixmap.h	serial: convert early_uart to earlycon for 8250	2007-07-16 09:05:35 -07:00
floppy.h
fpu32.h
futex.h	[PATCH] mm: pagefault_{disable,enable}()	2006-12-07 08:39:21 -08:00
genapic.h	[PATCH] x86-64: always use physical delivery mode on > 8 CPUs	2007-05-02 19:27:04 +02:00
hardirq.h
hpet.h	[PATCH] time: x86_64: split x86_64/kernel/time.c up	2007-02-16 08:14:00 -08:00
hw_irq.h	[PATCH] x86_64 irq: Fix comments after changing IRQ0_VECTOR from 0x20 to 0x30	2007-03-29 08:16:23 -07:00
hypertransport.h
i387.h
ia32_unistd.h
ia32.h
ide.h
idle.h
intel_arch_perfmon.h
io_apic.h	[PATCH] io_apic.h needs apicdef.h	2007-03-05 07:57:50 -08:00
io.h	serial: convert early_uart to earlycon for 8250	2007-07-16 09:05:35 -07:00
ioctl.h
ioctls.h	[PATCH] termios: Enable new style termios ioctls on x86-64	2006-12-08 08:28:57 -08:00
ipcbuf.h
ipi.h	[PATCH] x86-64: Use safe_apic_wait_icr_idle in __send_IPI_dest_field - x86_64	2007-05-02 19:27:18 +02:00
irq_regs.h
irq.h
irqflags.h	[PATCH] x86-64: Use X86_EFLAGS_IF in x86-64/irqflags.h.	2007-05-02 19:27:11 +02:00
k8.h
Kbuild	consolidate asm/const.h to linux/const.h	2007-05-08 11:15:13 -07:00
kdebug.h	Revert "ipmi: add new IPMI nmi watchdog handling"	2007-05-14 15:24:24 -07:00
kexec.h	kdump/kexec: calculate note size at compile time	2007-05-08 11:15:07 -07:00
kmap_types.h
kprobes.h	jprobes: remove JPROBE_ENTRY()	2007-07-19 10:04:44 -07:00
ldt.h
linkage.h
local.h	local_t: x86_64 extension	2007-05-08 11:15:20 -07:00
mach_apic.h
mc146818rtc.h
mce.h	[PATCH] x86-64: Allow to run a program when a machine check event is detected	2007-02-13 13:26:23 +01:00
mman.h
mmsegment.h
mmu_context.h	[PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction	2007-05-02 19:27:14 +02:00
mmu.h	x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu	2007-07-21 18:37:08 -07:00
mmzone.h	[PATCH] x86-64: configurable fake numa node sizes	2007-05-02 19:27:09 +02:00
module.h
mpspec.h
msgbuf.h
msidef.h
msr-index.h	[PATCH] x86: Clean up x86 control register and MSR macros (corrected)	2007-05-02 19:27:12 +02:00
msr.h	i386: Add safe variants of rdmsr_on_cpu and wrmsr_on_cpu	2007-05-08 17:22:01 +02:00
mtrr.h	[PATCH] x86: Save the MTRRs of the BSP before booting an AP	2007-05-02 19:27:17 +02:00
mutex.h	[PATCH] x86-64: Remove fastcall references in x86_64 code	2007-02-13 13:26:22 +01:00
namei.h
nmi.h	[PATCH] x86-64: Use the 32bit wd_ops for 64bit too.	2007-05-02 19:27:20 +02:00
node.h
numa.h
page.h	Add __GFP_MOVABLE for callers to flag allocations from high memory that may be migrated	2007-07-17 10:22:59 -07:00
param.h
parport.h
pci-direct.h	[PATCH] x86: add write_pci_config_byte() to direct PCI access routines	2006-12-07 02:14:10 +01:00
pci.h	PCI: remove pci_dac_dma_... APIs	2007-07-11 16:02:11 -07:00
pda.h
percpu.h	define new percpu interface for shared data	2007-07-19 10:04:44 -07:00
pgalloc.h	[PATCH] x86-64: use lru instead of page->index and page->private for pgd lists management.	2007-05-02 19:27:10 +02:00
pgtable.h	mm: remove ptep_test_and_clear_dirty and ptep_clear_flush_dirty	2007-07-17 10:22:59 -07:00
poll.h	Consolidate asm/poll.h	2007-05-11 08:29:34 -07:00
posix_types.h
prctl.h
processor-flags.h	[PATCH] x86: Clean up x86 control register and MSR macros (corrected)	2007-05-02 19:27:12 +02:00
processor.h	Use a new CPU feature word to cover features that are spread around	2007-07-12 10:55:54 -07:00
proto.h	[PATCH] x86-64: Move mtrr prototypes from proto.h to mtrr.h	2007-05-02 19:27:17 +02:00
ptrace-abi.h
ptrace.h	x86_64: asm/ptrace.h needs linux/compiler.h	2007-07-21 18:37:07 -07:00
required-features.h	Use a new CPU feature word to cover features that are spread around	2007-07-12 10:55:54 -07:00
resource.h
rio.h
rtc.h
rwlock.h
scatterlist.h	PCI: scatterlist.h needs types.h	2007-05-02 19:02:34 -07:00
seccomp.h
sections.h
segment.h	x86-64: add symbolic constants for the boot segment selectors	2007-07-12 10:55:54 -07:00
semaphore.h
sembuf.h
serial.h	x86, serial: convert legacy COM ports to platform devices	2007-05-08 11:15:23 -07:00
setup.h	[PATCH] x86_64: 2048-byte command line	2007-02-12 09:48:39 -08:00
shmbuf.h
shmparam.h
sigcontext32.h
sigcontext.h
siginfo.h
signal.h
smp.h	Use the APIC to determine the hardware processor id - x86_64	2007-05-09 12:30:48 -07:00
socket.h	[NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support	2007-04-25 22:24:21 -07:00
sockios.h	[NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution	2007-04-25 22:24:04 -07:00
sparsemem.h
spinlock_types.h
spinlock.h
stacktrace.h	[PATCH] x86: add sysctl for kstack_depth_to_print	2006-12-07 02:14:11 +01:00
stat.h
statfs.h
string.h	x86_64: Always use builtin memcpy on gcc 4.3	2007-07-21 18:37:08 -07:00
suspend.h	[PATCH] x86-64: wakeup.S rename registers to reflect right names	2007-05-02 19:27:07 +02:00
swiotlb.h	Revert "[IA64] swiotlb abstraction (e.g. for Xen)"	2007-03-06 13:31:45 -08:00
system.h	x86_64: wbinvd macro fix	2007-07-21 17:49:13 -07:00
tce.h
termbits.h	tty: i386/x86_64 arbitary speed support	2007-05-08 11:15:03 -07:00
termios.h	[PATCH] consolidate line discipline number definitions	2007-02-11 10:51:26 -08:00
therm_throt.h
thread_info.h	wrap access to thread_info	2007-05-09 12:30:56 -07:00
timex.h	[PATCH] x86: Log reason why TSC was marked unstable	2007-05-02 19:27:08 +02:00
tlb.h
tlbflush.h	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
topology.h	[PATCH] sched: remove SMT nice	2007-03-05 07:57:51 -08:00
tsc.h	[PATCH] i386: make x86_64 tsc header require i386 rather than vice-versa	2007-03-06 09:30:24 -08:00
types.h
uaccess.h	[PATCH] kill bogus casts in amd64 uaccess.h	2007-03-14 15:27:50 -07:00
ucontext.h
unaligned.h
unistd.h	sys_fallocate() implementation on i386, x86_64 and powerpc	2007-07-17 21:42:44 -04:00
unwind.h	Remove stack unwinder for now	2006-12-15 08:47:51 -08:00
user32.h
user.h
vga.h
vgtod.h	x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu	2007-07-21 18:37:08 -07:00
vsyscall32.h
vsyscall.h	x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu	2007-07-21 18:37:08 -07:00
xor.h