talos-op-linux/arch/x86_64/kernel/setup64.c, branch v3.1-rc9

x86_64: move kernel

2007-10-11T09:17:24+00:00

Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar

x86_64: Ignore compat mode SYSCALL when IA32_EMULATION is not defined

2007-06-23T01:41:19+00:00

Previously a program could switch to a compat mode segment and then execute SYSCALL and it would jump to an uninitialized MSR and crash the kernel. Instead supply a dummy target for this case. Pointed out by Jan Beulich Cc: jbeulich@novell.com Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds

[PATCH] x86: Allow percpu variables to be page-aligned

2007-05-02T17:27:12+00:00

Let's allow page-alignment in general for per-cpu data (wanted by Xen, and Ingo suggested KVM as well). Because larger alignments can use more room, we increase the max per-cpu memory to 64k rather than 32k: it's getting a little tight. Signed-off-by: Rusty Russell Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Andi Kleen Acked-by: Ingo Molnar Cc: Andi Kleen Signed-off-by: Andrew Morton

[PATCH] x86-64: Remove the identity mapping as early as possible

2007-05-02T17:27:07+00:00

With the rewrite of the SMP trampoline and the early page allocator there is nothing that needs identity mapped pages, once we start executing C code. So add zap_identity_mappings into head64.c and remove zap_low_mappings() from much later in the code. The functions are subtly different thus the name change. This also kills boot_level4_pgt which was from an earlier attempt to move the identity mappings as early as possible, and is now no longer needed. Essentially I have replaced boot_level4_pgt with trampoline_level4_pgt in trampoline.S Signed-off-by: Eric W. Biederman Signed-off-by: Vivek Goyal Signed-off-by: Andi Kleen

[PATCH] x86-64: Unexport __supported_pte_mask

2007-02-13T12:26:24+00:00

The symbol is needed to manipulate page tables, and modules shouldn't do that. Leftover from 2.4, but no in tree module should need it now. Signed-off-by: Andi Kleen

[PATCH] Don't leak NT bit into next task

2006-09-26T08:52:41+00:00

SYSENTER can cause a NT to be set which might cause crashes on the IRET in the next task. Following similar i386 patch from Linus. Signed-off-by: Andi Kleen

[PATCH] Remove most of the special cases for the debug IST stack

2006-09-26T08:52:38+00:00

Remove most of the special cases for the debug IST stack. This is a follow on clean up patch, it requires the bug fix patch that adds orig_ist. Signed-off-by: Keith Owens Signed-off-by: Andi Kleen

[PATCH] Optimize PDA accesses slightly

2006-09-26T08:52:38+00:00

Based on a idea by Jeremy Fitzhardinge: Replace the volatiles and memory clobbers in the PDA access with telling gcc about access to a proxy PDA structure that doesn't actually exist. But the dummy accesses give a defined ordering for read/write accesses. Also add some memory barriers to the early GS initialization to make sure no PDA access is moved before it. Advantage is some .text savings (probably most from better code for accessing "current"): text data bss dec hex filename 4845647 1223688 615864 6685199 66020f vmlinux 4837780 1223688 615864 6677332 65e354 vmlinux-pda 1.2% smaller code Cc: Jeremy Fitzhardinge Signed-off-by: Andi Kleen

[PATCH] Auto size the per cpu area.

2006-09-26T08:52:35+00:00

Now for a completely different but trivial approach. I just boot tested it with 255 CPUS and everything worked. Currently everything (except module data) we place in the per cpu area we know about at compile time. So instead of allocating a fixed size for the per_cpu area allocate the number of bytes we need plus a fixed constant for to be used for modules. It isn't perfect but it is much less of a pain to work with than what we are doing now. AK: fixed warning Signed-off-by: Eric W. Biederman Signed-off-by: Andi Kleen

[PATCH] Make boot_param_data pure BSS

2006-09-26T08:52:35+00:00

Since it's all zero. Actually I think gcc 4+ will do that automatically, but earlier compilers won't Signed-off-by: Andi Kleen