kernel.git/arch/x86/include/asm/thread_info.h, branch linux-4.3.y

x86/entry: Remove do_notify_resume(), syscall_trace_leave(), and their TIF masks

2015-08-05T08:54:35Z

They are no longer used. Good riddance! Deleting the TIF_ macros is really nice. It was never clear why there were so many variants. Signed-off-by: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: Eric Paris Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/22c61682f446628573dde0f1d573ab821677e06da.1438378274.git.luto@kernel.org Signed-off-by: Ingo Molnar

x86/vm86: Use the normal pt_regs area for vm86

2015-07-31T11:31:09Z

Change to use the normal pt_regs area to enter and exit vm86 mode. This is done by increasing the padding at the top of the stack to make room for the extra vm86 segment slots in the IRET frame. It then saves the 32-bit regs in the off-stack vm86 data, and copies in the vm86 regs. Exiting back to 32-bit mode does the reverse. This allows removing the hacks to jump directly into the exit asm code due to having to change the stack pointer. Returning normally from the vm86 syscall and the exception handlers allows things like ptrace and auditing to work properly. Signed-off-by: Brian Gerst Acked-by: Andy Lutomirski Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1438148483-11932-5-git-send-email-brgerst@gmail.com Signed-off-by: Ingo Molnar

x86/entry: Define 'cpu_current_top_of_stack' for 64-bit code

2015-05-08T11:50:02Z

32-bit code has PER_CPU_VAR(cpu_current_top_of_stack). 64-bit code uses somewhat more obscure: PER_CPU_VAR(cpu_tss + TSS_sp0). Define the 'cpu_current_top_of_stack' macro on CONFIG_X86_64 as well so that the PER_CPU_VAR(cpu_current_top_of_stack) expression can be used in both 32-bit and 64-bit code. Signed-off-by: Denys Vlasenko Cc: Alexei Starovoitov Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Steven Rostedt Cc: Thomas Gleixner Cc: Will Drewry Link: http://lkml.kernel.org/r/1429889495-27850-3-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar

x86/entry: Remove unused 'kernel_stack' per-cpu variable

2015-05-08T11:49:43Z

Signed-off-by: Denys Vlasenko Acked-by: Andy Lutomirski Cc: Alexei Starovoitov Cc: Andrew Morton Cc: Borislav Petkov Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Steven Rostedt Cc: Thomas Gleixner Cc: Will Drewry Link: http://lkml.kernel.org/r/1429889495-27850-2-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar

x86/entry: Stop using PER_CPU_VAR(kernel_stack)

2015-05-08T11:43:52Z

PER_CPU_VAR(kernel_stack) is redundant: - On the 64-bit build, we can use PER_CPU_VAR(cpu_tss + TSS_sp0). - On the 32-bit build, we can use PER_CPU_VAR(cpu_current_top_of_stack). PER_CPU_VAR(kernel_stack) will be deleted by a separate change. Signed-off-by: Denys Vlasenko Cc: Alexei Starovoitov Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Steven Rostedt Cc: Thomas Gleixner Cc: Will Drewry Link: http://lkml.kernel.org/r/1429889495-27850-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar

Merge branch 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

2015-04-15T20:53:55Z

Pull exec domain removal from Richard Weinberger: "This series removes execution domain support from Linux. The idea behind exec domains was to support different ABIs. The feature was never complete nor stable. Let's rip it out and make the kernel signal handling code less complicated" * 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (27 commits) arm64: Removed unused variable sparc: Fix execution domain removal Remove rest of exec domains. arch: Remove exec_domain from remaining archs arc: Remove signal translation and exec_domain xtensa: Remove signal translation and exec_domain xtensa: Autogenerate offsets in struct thread_info x86: Remove signal translation and exec_domain unicore32: Remove signal translation and exec_domain um: Remove signal translation and exec_domain tile: Remove signal translation and exec_domain sparc: Remove signal translation and exec_domain sh: Remove signal translation and exec_domain s390: Remove signal translation and exec_domain mn10300: Remove signal translation and exec_domain microblaze: Remove signal translation and exec_domain m68k: Remove signal translation and exec_domain m32r: Remove signal translation and exec_domain m32r: Autogenerate offsets in struct thread_info frv: Remove signal translation and exec_domain ...

x86: Remove signal translation and exec_domain

2015-04-12T19:03:28Z

As execution domain support is gone we can remove signal translation from the signal code and remove exec_domain from thread_info. Signed-off-by: Richard Weinberger

x86/asm/entry/64: Rename THREAD_INFO() to ASM_THREAD_INFO()

2015-03-24T19:57:31Z

The THREAD_INFO() macro has a somewhat confusingly generic name, defined in a generic .h C header file. It also does not make it clear that it constructs a memory operand for use in assembly code. Rename it to ASM_THREAD_INFO() to make it all glaringly obvious on first glance. Acked-by: Borislav Petkov Cc: Alexei Starovoitov Cc: Andy Lutomirski Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Denys Vlasenko Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Steven Rostedt Cc: Will Drewry Link: http://lkml.kernel.org/r/20150324184442.GC14760@gmail.com Signed-off-by: Ingo Molnar

x86/asm/entry/64: Merge the field offset into the THREAD_INFO() macro

2015-03-24T19:57:31Z

Before: TI_sysenter_return+THREAD_INFO(%rsp,3*8),%r10d After: movl THREAD_INFO(TI_sysenter_return, %rsp, 3*8), %r10d to turn it into a clear thread_info accessor. No code changed: md5: fb4cb2b3ce05d89940ca304efc8ff183 ia32entry.o.before.asm fb4cb2b3ce05d89940ca304efc8ff183 ia32entry.o.after.asm e39f2958a5d1300158e276e4f7663263 entry_64.o.before.asm e39f2958a5d1300158e276e4f7663263 entry_64.o.after.asm Acked-by: Andy Lutomirski Acked-by: Denys Vlasenko Cc: Alexei Starovoitov Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Borislav Petkov Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Steven Rostedt Cc: Will Drewry Link: http://lkml.kernel.org/r/20150324184411.GB14760@gmail.com Signed-off-by: Ingo Molnar

x86/asm/entry/64: Improve the THREAD_INFO() macro explanation

2015-03-24T19:57:30Z

Explain the background, and add a real example. Acked-by: Denys Vlasenko Acked-by: Andy Lutomirski Acked-by: Borislav Petkov Cc: Alexei Starovoitov Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Steven Rostedt Cc: Will Drewry Link: http://lkml.kernel.org/r/20150324184311.GA14760@gmail.com Signed-off-by: Ingo Molnar