kernel.git/arch/x86/kernel/kgdb.c, branch linux-4.14.y

x86/kgbd: Use NMI_VECTOR not APIC_DM_NMI

2020-01-27T13:46:41Z

[ Upstream commit 2591bc4e8d70b4e1330d327fb7e3921f4e070a51 ] apic->send_IPI_allbutself() takes a vector number as argument. APIC_DM_NMI is clearly not a vector number. It's defined to 0x400 which is outside the vector space. Use NMI_VECTOR instead as that's what it is intended to be. Fixes: 82da3ff89dc2 ("x86: kgdb support") Signed-off-by: Thomas Gleixner Acked-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20190722105218.855189979@linutronix.de Signed-off-by: Sasha Levin

sched/x86: Add 'struct inactive_task_frame' to better document the sleeping task stack frame

2016-08-24T10:27:41Z

Add 'struct inactive_task_frame', which defines the layout of the stack for a sleeping process. For now, the only defined field is the BP register (frame pointer). Signed-off-by: Brian Gerst Reviewed-by: Josh Poimboeuf 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/1471106302-10159-4-git-send-email-brgerst@gmail.com Signed-off-by: Ingo Molnar

sched/x86/64, kgdb: Clear GDB_PS on 64-bit

2016-08-24T10:27:40Z

switch_to() no longer saves EFLAGS, so it's bogus to look for it on the stack. Set it to zero like 32-bit. Signed-off-by: Brian Gerst Reviewed-by: Josh Poimboeuf Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Jason Wessel Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1471106302-10159-3-git-send-email-brgerst@gmail.com Signed-off-by: Ingo Molnar

sched/x86/32, kgdb: Don't use thread.ip in sleeping_thread_to_gdb_regs()

2016-08-24T10:27:40Z

Match 64-bit and set gdb_regs[GDB_PC] to zero. thread.ip is always the same point in the scheduler (except for newly forked processes), and will be removed in a future patch. Signed-off-by: Brian Gerst Reviewed-by: Josh Poimboeuf Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Jason Wessel Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1471106302-10159-2-git-send-email-brgerst@gmail.com Signed-off-by: Ingo Molnar

x86/asm: Stop depending on ptrace.h in alternative.h

2016-04-29T09:56:40Z

alternative.h pulls in ptrace.h, which means that alternatives can't be used in anything referenced from ptrace.h, which is a mess. Break the dependency by pulling text patching helpers into their own header. Signed-off-by: Andy Lutomirski Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/99b93b13f2c9eb671f5c98bba4c2cbdc061293a2.1461698311.git.luto@kernel.org Signed-off-by: Ingo Molnar

Merge branch 'x86/cleanups' into x86/urgent

2016-03-17T08:44:57Z

Pull in some merge window leftovers. Signed-off-by: Ingo Molnar

x86: Fix misspellings in comments

2016-02-24T07:44:58Z

Signed-off-by: Adam Buchbinder Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: trivial@kernel.org Signed-off-by: Ingo Molnar

x86/mm: Always enable CONFIG_DEBUG_RODATA and remove the Kconfig option

2016-02-22T07:51:38Z

This removes the CONFIG_DEBUG_RODATA option and makes it always enabled. This simplifies the code and also makes it clearer that read-only mapped memory is just as fundamental a security feature in kernel-space as it is in user-space. Suggested-by: Ingo Molnar Signed-off-by: Kees Cook Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Gerst Cc: David Brown Cc: Denys Vlasenko Cc: Emese Revfy Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Mathias Krause Cc: Michael Ellerman Cc: PaX Team Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: kernel-hardening@lists.openwall.com Cc: linux-arch Link: http://lkml.kernel.org/r/1455748879-21872-4-git-send-email-keescook@chromium.org Signed-off-by: Ingo Molnar

x86/kgdb: Replace bool_int_array[NR_CPUS] with bitmap

2015-09-28T08:13:31Z

Straigntforward conversion from: int was_in_debug_nmi[NR_CPUS] to: DECLARE_BITMAP(was_in_debug_nmi, NR_CPUS) Saves about 2 kbytes in BSS for NR_CPUS=512. Signed-off-by: Denys Vlasenko Cc: H. Peter Anvin Cc: Jason Wessel Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1443271638-2568-1-git-send-email-dvlasenk@redhat.com [ Tidied up the code a bit. ] Signed-off-by: Ingo Molnar

Merge tag 'v4.0-rc7' into x86/asm, to resolve conflicts

2015-04-08T07:01:54Z

Conflicts: arch/x86/kernel/entry_64.S Signed-off-by: Ingo Molnar