Messages in this thread Patch in this message | | | From | Ricardo Neri <> | Subject | [PATCH v6 16/29] x86/hpet: Prepare IRQ assignments to use the X86_ALLOC_AS_NMI flag | Date | Thu, 5 May 2022 16:59:55 -0700 |
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The flag X86_ALLOC_AS_NMI indicates that the IRQs to be allocated in an IRQ domain need to be configured as NMIs. Add an as_nmi argument to hpet_assign_irq(). Even though the HPET clock events do not need NMI IRQs, the HPET hardlockup detector does. A subsequent changeset will implement the reservation of a channel for it.
Cc: Andi Kleen <ak@linux.intel.com> Cc: "Ravi V. Shankar" <ravi.v.shankar@intel.com> Cc: Stephane Eranian <eranian@google.com> Cc: iommu@lists.linux-foundation.org Cc: linuxppc-dev@lists.ozlabs.org Cc: x86@kernel.org Suggested-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com> --- Changes since v5: * Introduced this patch.
Changes since v4: * N/A
Changes since v3: * N/A
Changes since v2: * N/A
Changes since v1: * N/A --- arch/x86/kernel/hpet.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index 2c6713b40921..02d25e00e93f 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -618,7 +618,7 @@ static inline int hpet_dev_id(struct irq_domain *domain) } static int hpet_assign_irq(struct irq_domain *domain, struct hpet_channel *hc, - int dev_num) + int dev_num, bool as_nmi) { struct irq_alloc_info info; @@ -627,6 +627,8 @@ static int hpet_assign_irq(struct irq_domain *domain, struct hpet_channel *hc, info.data = hc; info.devid = hpet_dev_id(domain); info.hwirq = dev_num; + if (as_nmi) + info.flags |= X86_IRQ_ALLOC_AS_NMI; return irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, &info); } @@ -755,7 +757,7 @@ static void __init hpet_select_clockevents(void) sprintf(hc->name, "hpet%d", i); - irq = hpet_assign_irq(hpet_domain, hc, hc->num); + irq = hpet_assign_irq(hpet_domain, hc, hc->num, false); if (irq <= 0) continue; -- 2.17.1
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