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x86/db: Split out dr6/7 handling
authorPeter Zijlstra <peterz@infradead.org>
Mon, 6 Apr 2020 19:02:56 +0000 (21:02 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 11 Jun 2020 13:14:59 +0000 (15:14 +0200)
commit9f58fdde95c9509a4ded27a6d0035e79294002b4
tree52051e8aa46fb1962af8f97c4d6eb8876ca33936
parentf051f697955049c7cf10a635ab8149aa619243b2
x86/db: Split out dr6/7 handling

DR6/7 should be handled before nmi_enter() is invoked and restore after
nmi_exit() to minimize the exposure.

Split it out into helper inlines and bring it into the correct order.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505135314.808628211@linutronix.de
arch/x86/kernel/hw_breakpoint.c
arch/x86/kernel/traps.c