linux-stable/arch/x86
Andy Lutomirski 7d8d8cfdee x86/doublefault/32: Rewrite the x86_32 #DF handler and unify with 64-bit
The old x86_32 doublefault_fn() was old and crufty, and it did not
even try to recover.  do_double_fault() is much nicer.  Rewrite the
32-bit double fault code to sanitize CPU state and call
do_double_fault().  This is mostly an exercise i386 archaeology.

With this patch applied, 32-bit double faults get a real stack trace,
just like 64-bit double faults.

[ mingo: merged the patch to a later kernel base. ]

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-11-26 22:00:04 +01:00
..
boot Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
configs x86: Remove the calgary IOMMU driver 2019-11-15 10:36:59 +01:00
crypto Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
entry x86/doublefault/32: Rewrite the x86_32 #DF handler and unify with 64-bit 2019-11-26 22:00:04 +01:00
events Merge branch 'kvm-tsx-ctrl' into HEAD 2019-11-21 12:03:40 +01:00
hyperv x86/hyperv: Initialize clockevents earlier in CPU onlining 2019-11-15 10:33:49 +01:00
ia32 syscalls/x86: Use COMPAT_SYSCALL_DEFINE0 for IA32 (rt_)sigreturn 2019-10-11 12:49:18 +02:00
include x86/doublefault/32: Rewrite the x86_32 #DF handler and unify with 64-bit 2019-11-26 22:00:04 +01:00
kernel x86/doublefault/32: Rewrite the x86_32 #DF handler and unify with 64-bit 2019-11-26 22:00:04 +01:00
kvm Merge branch 'x86-iopl-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 11:12:02 -08:00
lib Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
math-emu Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
mm x86/doublefault/32: Move #DF stack and TSS to cpu_entry_area 2019-11-26 21:53:34 +01:00
net bpf: Simplify __bpf_arch_text_poke poke type handling 2019-11-24 17:12:11 -08:00
oprofile x86: Use pr_warn instead of pr_warning 2019-10-18 15:00:18 +02:00
pci dma-mapping updates for 5.4: 2019-09-19 13:27:23 -07:00
platform Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
power x86/asm/32: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 12:03:43 +02:00
purgatory Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
ras
realmode Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
tools x86/insn: Fix awk regexp warnings 2019-10-01 12:13:16 +02:00
um x86/um: Annotate data appropriately 2019-10-18 10:45:03 +02:00
video
xen Merge branch 'x86-iopl-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 11:12:02 -08:00
.gitignore
Kbuild
Kconfig Merge branch 'x86-iopl-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 11:12:02 -08:00
Kconfig.cpu x86/math-emu: Limit MATH_EMULATION to 486SX compatibles 2019-10-03 10:51:17 +02:00
Kconfig.debug x86/traps: Disentangle the 32-bit and 64-bit doublefault code 2019-11-26 21:53:34 +01:00
Makefile x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning 2019-08-28 17:31:31 +02:00
Makefile.um
Makefile_32.cpu x86/math-emu: Limit MATH_EMULATION to 486SX compatibles 2019-10-03 10:51:17 +02:00