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Free up the IPI slot used by IPI_STOP_HARD.

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Change the numeric value of IPI_STOP_HARD so it doesn't occupy a valid IPI
slot. This can be done because IPI_STOP_HARD is actually delivered via NMI.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D1983
This commit is contained in:
Neel Natu 2015-03-01 02:31:27 +00:00
parent 7fdbba5e46
commit 847383d090
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=279468
1 changed files with 6 additions and 1 deletions
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7
sys/x86/include/apicvar.h
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@ -126,7 +126,12 @@
#define IPI_STOP (APIC_IPI_INTS + 7) /* Stop CPU until restarted. */
#define IPI_SUSPEND (APIC_IPI_INTS + 8) /* Suspend CPU until restarted. */
#define IPI_STOP_HARD (APIC_IPI_INTS + 9) /* Stop CPU with a NMI. */
/*
* IPI_STOP_HARD does not need to occupy a slot in the IPI vector space since
* it is delivered using an NMI anyways.
*/
#define IPI_STOP_HARD 255 /* Stop CPU with a NMI. */
/*
* The spurious interrupt can share the priority class with the IPIs since