Messages in this thread Patch in this message | | | From | Jiang Liu <> | Subject | [Patch Part1 V2 01/29] x86, irq: update high address field when updating affinity for MSI IRQ | Date | Tue, 20 May 2014 00:22:45 +0800 |
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If x2apic is enabled, the MSI high address field should also be aslo updated when setting affinity for MSI IRQ, otherwise the MSI IRQ may target wrong APIC IDs.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> --- arch/x86/kernel/apic/io_apic.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 9d0a9795a0f8..2de992501a1b 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -3007,6 +3007,10 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) __get_cached_msi_msg(data->msi_desc, &msg); + msg.address_hi = MSI_ADDR_BASE_HI; + if (x2apic_enabled()) + msg.address_hi |= MSI_ADDR_EXT_DEST_ID(dest); + msg.data &= ~MSI_DATA_VECTOR_MASK; msg.data |= MSI_DATA_VECTOR(cfg->vector); msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; -- 1.7.10.4
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