Hi, Peter,
> On Sun, Nov 08, 2020 at 04:29:16AM +, Fenghua Yu wrote:
> > split_lock_detect=
> > #AC for split lock #DB for bus lock
> >
> > off Do nothing Do nothing
> >
> > warnKernel OOPs Warn once per
On Sun, Nov 08, 2020 at 04:29:16AM +, Fenghua Yu wrote:
> split_lock_detect=
> #AC for split lock #DB for bus lock
>
> off Do nothing Do nothing
>
> warn Kernel OOPs Warn once per task and
>
#DB for bus lock is enabled by bus lock detection bit 2 in DEBUGCTL MSR
while #AC for split lock is enabled by split lock detection bit 29 in
TEST_CTRL MSR.
Delivery of #DB for bus lock in userspace clears DR6[11]. To avoid
confusion in identifying #DB, #DB handler sets the bit to 1 before
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