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Siddha, Suresh B f6c2e3330d [PATCH] x86_64: Unmap NULL during early bootup 
We should zap the low mappings, as soon as possible, so that we can catch
kernel bugs more effectively. Previously early boot had NULL mapped
and didn't trap on NULL references.

This patch introduces boot_level4_pgt, which will always have low identity
addresses mapped.  Druing boot, all the processors will use this as their
level4 pgt.  On BP, we will switch to init_level4_pgt as soon as we enter C
code and zap the low mappings as soon as we are done with the usage of
identity low mapped addresses.  On AP's we will zap the low mappings as
soon as we jump to C code.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2005-11-14 19:55:14 -08:00
..
acpi [PATCH] x86-64: more gratitious linux/irq.h includes 2005-09-12 10:50:58 -07:00
cpufreq Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile [PATCH] x86_64: Support for AMD specific MCE Threshold. 2005-11-14 19:55:13 -08:00
aperture.c [PATCH] x86_64: Fix gcc 4 warning in aperture.c 2005-11-14 19:55:14 -08:00
apic.c [PATCH] x86_64: Support for AMD specific MCE Threshold. 2005-11-14 19:55:13 -08:00
asm-offsets.c [PATCH] x86-64: Some cleanup and optimization to the processor data area. 2005-09-12 10:49:58 -07:00
crash.c [PATCH] x86-64: more gratitious linux/irq.h includes 2005-09-12 10:50:58 -07:00
e820.c [PATCH] x86_64: e820.c needs module.h 2005-09-17 11:50:00 -07:00
early_printk.c [PATCH] x86-64: Add simnow console 2005-09-12 10:49:58 -07:00
entry.S [PATCH] x86_64: Support for AMD specific MCE Threshold. 2005-11-14 19:55:13 -08:00
genapic.c [PATCH] x86-64: Use physflat on Intel for < 8 CPUs with CPU hotplug 2005-09-12 10:50:56 -07:00
genapic_cluster.c [PATCH] x86-64: Remove obsolete APIC "write around" bug workaround 2005-09-12 10:49:55 -07:00
genapic_flat.c [PATCH] x86-64: Delivery mode should be APIC_DM_FIXED when using physical mode. 2005-09-12 10:50:56 -07:00
head.S [PATCH] x86_64: Unmap NULL during early bootup 2005-11-14 19:55:14 -08:00
head64.c [PATCH] x86_64: Unmap NULL during early bootup 2005-11-14 19:55:14 -08:00
i387.c [PATCH] x86_64: Change init sections for CPU hotplug support 2005-06-25 16:24:30 -07:00
i8259.c [PATCH] x86_64: Support for AMD specific MCE Threshold. 2005-11-14 19:55:13 -08:00
init_task.c [PATCH] x86-64: Set the stack pointer correctly in init_thread and init_tss 2005-09-12 10:50:57 -07:00
io_apic.c [PATCH] i386/x86-64: Share interrupt vectors when there is a large number of interrupt sources 2005-11-14 19:55:13 -08:00
ioport.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
irq.c [PATCH] Remove unnecessary BUG_ON in irq.c 2005-09-12 10:50:55 -07:00
kprobes.c [PATCH] utilization of kprobe_mutex is incorrect on x86_64 2005-09-30 12:41:20 -07:00
ldt.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
machine_kexec.c [PATCH] x86_64 machine_kexec: Use standard pagetable helpers 2005-07-29 13:12:49 -07:00
mce.c [PATCH] x86_64: Support for AMD specific MCE Threshold. 2005-11-14 19:55:13 -08:00
mce_amd.c [PATCH] x86_64: Support for AMD specific MCE Threshold. 2005-11-14 19:55:13 -08:00
mce_intel.c [PATCH] x86_64: Change init sections for CPU hotplug support 2005-06-25 16:24:30 -07:00
module.c [PATCH] uml: kludgy compilation fixes for x86-64 subarch modules support 2005-05-05 16:36:33 -07:00
mpparse.c [PATCH] x86_64: Unmap NULL during early bootup 2005-11-14 19:55:14 -08:00
nmi.c [PATCH] x86_64: NMI watchdog frequency calculation adjustments 2005-09-13 08:22:33 -07:00
pci-dma.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci-gart.c [PATCH] x86_64: Use the DMA32 zone for dma_alloc_coherent()/pci_alloc_consistent 2005-11-14 19:55:14 -08:00
pci-nommu.c [PATCH] gfp_t: dma-mapping (amd64) 2005-10-28 08:16:48 -07:00
pmtimer.c [PATCH] x86_64: Add pmtimer support 2005-05-17 07:59:15 -07:00
process.c [PATCH] x86-64: more gratitious linux/irq.h includes 2005-09-12 10:50:58 -07:00
ptrace.c [PATCH] x86_64: TASK_SIZE fixes for compatibility mode processes 2005-06-21 18:46:12 -07:00
reboot.c [PATCH] x86_64 sync machine_power_off with i386 2005-07-26 14:35:45 -07:00
relocate_kernel.S [PATCH] kexec: x86_64 kexec implementation 2005-06-25 16:24:50 -07:00
setup.c [PATCH] x86_64: Unmap NULL during early bootup 2005-11-14 19:55:14 -08:00
setup64.c [PATCH] x86_64: Unmap NULL during early bootup 2005-11-14 19:55:14 -08:00
signal.c [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
smp.c [PATCH] x86_64: Remove duplicate __cpuinit define 2005-11-14 19:55:14 -08:00
smpboot.c [PATCH] x86_64: Unmap NULL during early bootup 2005-11-14 19:55:14 -08:00
suspend.c [PATCH] swsusp: rework memory freeing on resume 2005-10-30 17:37:14 -08:00
suspend_asm.S [PATCH] x86_64: Set up safe page tables during resume 2005-10-10 08:36:46 -07:00
sys_x86_64.c [PATCH] Avoiding mmap fragmentation 2005-06-21 18:46:16 -07:00
syscall.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
time.c [PATCH] hpet-RTC: cache the comparator register 2005-10-30 17:37:30 -08:00
trampoline.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
traps.c [PATCH] x86_64: Support for AMD specific MCE Threshold. 2005-11-14 19:55:13 -08:00
vmlinux.lds.S [PATCH] x86_64 linker script cleanups for debug sections 2005-09-10 12:00:17 -07:00
vsyscall.c [PATCH] x86-64: Prevent gcc 4 from optimizing away vsyscalls 2005-09-12 10:50:56 -07:00
x8664_ksyms.c [LIB]: Consolidate _atomic_dec_and_lock() 2005-09-14 21:47:01 -07:00