Peter Zijlstra fd501d4f03 x86/entry: Remove DBn stacks ...

Both #DB itself, as all other IST users (NMI, #MC) now clear DR7 on
entry. Combined with not allowing breakpoints on entry/noinstr/NOKPROBE
text and no single step (EFLAGS.TF) inside the #DB handler should guarantee
no nested #DB.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200529213321.303027161@infradead.org

2020-06-11 15:15:23 +02:00

..

asm

x86/entry: Remove DBn stacks

2020-06-11 15:15:23 +02:00

uapi/asm

ARM:

2020-06-03 15:13:47 -07:00