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authorRobin Holt <holt@sgi.com>2009-10-20 14:36:15 -0500
committerIngo Molnar <mingo@elte.hu>2009-10-21 13:31:13 +0200
commit02dd0a0613e0d84c7dd8315e3fe6204d005b7c79 (patch)
treec92bab134966741b89d60623b6fc2980510c3ebb /arch/x86
parent1d21e6e3ffad2939f9d8179817c6f9bc3b811b68 (diff)
x86, UV: Set DELIVERY_MODE=4 for vector=NMI_VECTOR in uv_hub_send_ipi()
When sending a NMI_VECTOR IPI using the UV_HUB_IPI_INT register, we need to ensure the delivery mode field of that register has NMI delivery selected. This makes those IPIs true NMIs, instead of flat IPIs. It matters to reboot sequences and KGDB, both of which use NMI IPIs. Signed-off-by: Robin Holt <holt@sgi.com> Acked-by: Jack Steiner <steiner@sgi.com> Cc: Martin Hicks <mort@sgi.com> Cc: <stable@kernel.org> LKML-Reference: <20091020193620.877322000@alcatraz.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/uv/uv_hub.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index 94908a08020..d1414af9855 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -19,6 +19,8 @@
#include <asm/types.h>
#include <asm/percpu.h>
#include <asm/uv/uv_mmrs.h>
+#include <asm/irq_vectors.h>
+#include <asm/io_apic.h>
/*
@@ -435,9 +437,14 @@ static inline void uv_set_cpu_scir_bits(int cpu, unsigned char value)
static inline void uv_hub_send_ipi(int pnode, int apicid, int vector)
{
unsigned long val;
+ unsigned long dmode = dest_Fixed;
+
+ if (vector == NMI_VECTOR)
+ dmode = dest_NMI;
val = (1UL << UVH_IPI_INT_SEND_SHFT) |
((apicid) << UVH_IPI_INT_APIC_ID_SHFT) |
+ (dmode << UVH_IPI_INT_DELIVERY_MODE_SHFT) |
(vector << UVH_IPI_INT_VECTOR_SHFT);
uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
}