linux/include/asm-x86/thread_info_64.h, branch master

x86: merge thread_info.h

2008-05-12T19:28:02Z

Simple merge of both thread_info_32.h and thread_info_64.h into thread_info.h. Comments for #ifndef __ASM_THREAD_INFO_H and #ifdef __KERNEL__ are the same. Signed-off-by: Christoph Lameter Signed-off-by: Ingo Molnar

revert: thread_info.h change

2008-05-12T19:28:02Z

temporarily revert parts of "signals: x86 TS_RESTORE_SIGMASK". Signed-off-by: Ingo Molnar

signals: x86 TS_RESTORE_SIGMASK

2008-04-30T15:29:37Z

Replace TIF_RESTORE_SIGMASK with TS_RESTORE_SIGMASK and define our own set_restore_sigmask() function. This saves the costly SMP-safe set_bit operation, which we do not need for the sigmask flag since TIF_SIGPENDING always has to be set too. Signed-off-by: Roland McGrath Cc: Oleg Nesterov Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: "Luck, Tony" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

x86, fpu: split FPU state from task struct - v5

2008-04-19T17:19:55Z

Split the FPU save area from the task struct. This allows easy migration of FPU context, and it's generally cleaner. It also allows the following two optimizations: 1) only allocate when the application actually uses FPU, so in the first lazy FPU trap. This could save memory for non-fpu using apps. Next patch does this lazy allocation. 2) allocate the right size for the actual cpu rather than 512 bytes always. Patches enabling xsave/xrstor support (coming shortly) will take advantage of this. Signed-off-by: Suresh Siddha Signed-off-by: Arjan van de Ven Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

x86: implement prctl PR_GET_TSC and PR_SET_TSC

2008-04-19T17:19:55Z

This patch implements the PR_GET_TSC and PR_SET_TSC prctl() commands on the x86 platform (both 32 and 64 bit.) These commands control the ability to read the timestamp counter from userspace (the RDTSC instruction.) While the RDTSC instuction is a useful profiling tool, it is also the source of some non-determinism in ring-3. For deterministic replay applications it is useful to be able to trap and emulate (and record the outcome of) this instruction. This patch uses code earlier used to disable the timestamp counter for the SECCOMP framework. A side-effect of this patch is that the SECCOMP environment will now also disable the timestamp counter on x86_64 due to the addition of the TIF_NOTSC define on this platform. The code which enables/disables the RDTSC instruction during context switches is in the __switch_to_xtra function, which already handles other unusual conditions, so normal performance should not have to suffer from this change. Signed-off-by: Erik Bosman Acked-by: Arjan van de Ven Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

include/asm-x86/thread_info_64.h: checkpatch cleanups - formatting only

2008-04-17T15:41:28Z

Signed-off-by: Joe Perches Signed-off-by: Ingo Molnar

x86: fix duplicated TIF on 64-bit

2008-01-30T22:27:57Z

commit 7e9916040b3020d0f36d68bb7512e3b80b623097 and commit eee3af4a2c83a97fff107ddc445d9df6fded9ce4 Both use the same TIF number (25) in thread_info_64.h. This patch changes the TIF ids. Signed-off-by: Mathieu Desnoyers Signed-off-by: Ingo Molnar

x86: unify mm_segment_t definition

2008-01-30T12:31:38Z

This patch moves the mm_segment_t structure definition to processor.h This makes mmsegment.h file useless, and it is deleted. Signed-off-by: Glauber de Oliveira Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

x86, ptrace: support for branch trace store(BTS)

2008-01-30T12:31:09Z

Resend using different mail client Changes to the last version: - split implementation into two layers: ds/bts and ptrace - renamed TIF's - save/restore ds save area msr in __switch_to_xtra() - make block-stepping only look at BTF bit Signed-off-by: Markus Metzger Signed-off-by: Suresh Siddha Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

x86: debugctlmsr context switch

2008-01-30T12:30:54Z

This adds low-level support for a per-thread value of MSR_IA32_DEBUGCTLMSR. The per-thread value is switched in when TIF_DEBUGCTLMSR is set. Signed-off-by: Roland McGrath Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner