Fix NetBSD de(4) problem on Hyper-V

amd64-reg.patch

Index: amd64/include/i82093reg.h
===================================================================
RCS file: /cvs/cvsroot/src/sys/arch/amd64/include/i82093reg.h,v
retrieving revision 1.5
diff -u -r1.5 i82093reg.h
--- amd64/include/i82093reg.h	3 Jul 2008 14:02:25 -0000	1.5
+++ amd64/include/i82093reg.h	4 Jul 2016 08:45:00 -0000
@@ -50,6 +50,7 @@
 	movq	IOAPIC_SC_DATA(%rdi),%r15			;\
 	movl	(%r15),%esi					;\
 	orl	$IOAPIC_REDLO_MASK,%esi				;\
+	andl	$~IOAPIC_REDLO_RIRR,%esi			;\
 	movl	%esi,(%r15)					;\
 	movq	IS_PIC(%r14),%rdi				;\
 	ioapic_asm_unlock(num)
@@ -66,7 +67,7 @@
 	movq	IOAPIC_SC_DATA(%rdi),%r13			;\
 	movl	%esi, (%r15)					;\
 	movl	(%r13),%r12d					;\
-	andl	$~IOAPIC_REDLO_MASK,%r12d			;\
+	andl	$~(IOAPIC_REDLO_MASK|IOAPIC_REDLO_RIRR),%r12d	;\
 	movl	%esi,(%r15)					;\
 	movl	%r12d,(%r13)					;\
 	movq	IS_PIC(%r14),%rdi				;\

ioapic.patch

Index: x86/x86/ioapic.c
===================================================================
RCS file: /cvs/cvsroot/src/sys/arch/x86/x86/ioapic.c,v
retrieving revision 1.52
diff -u -r1.52 ioapic.c
--- x86/x86/ioapic.c	27 Jul 2015 15:45:20 -0000	1.52
+++ x86/x86/ioapic.c	4 Jul 2016 08:43:56 -0000
@@ -508,6 +508,7 @@
 	flags = ioapic_lock(sc);
 	redlo = ioapic_read_ul(sc, IOAPIC_REDLO(pin));
 	redlo |= IOAPIC_REDLO_MASK;
+	redlo &= ~IOAPIC_REDLO_RIRR;
 	ioapic_write_ul(sc, IOAPIC_REDLO(pin), redlo);
 	ioapic_unlock(sc, flags);
 }
@@ -548,7 +549,7 @@
 
 	flags = ioapic_lock(sc);
 	redlo = ioapic_read_ul(sc, IOAPIC_REDLO(pin));
-	redlo &= ~IOAPIC_REDLO_MASK;
+	redlo &= ~(IOAPIC_REDLO_MASK | IOAPIC_REDLO_RIRR);
 	ioapic_write_ul(sc, IOAPIC_REDLO(pin), redlo);
 	ioapic_unlock(sc, flags);
 }