linux-kernel - [PATCH v6 04/29] x86/apic: Add the X86_IRQ_ALLOC_AS

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Date:   Thu,  5 May 2022 16:59:43 -0700
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org
Cc:     Tony Luck <tony.luck@...el.com>, Andi Kleen <ak@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Joerg Roedel <joro@...tes.org>,
        Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
        David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Nicholas Piggin <npiggin@...il.com>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Ricardo Neri <ricardo.neri@...el.com>,
        iommu@...ts.linux-foundation.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org,
        Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Subject: [PATCH v6 04/29] x86/apic: Add the X86_IRQ_ALLOC_AS_NMI irq allocation flag

There are cases in which it is necessary to set the delivery mode of an
interrupt as NMI. Add a new flag that callers can specify when allocating
an IRQ.

Cc: Andi Kleen <ak@...ux.intel.com>
Cc: "Ravi V. Shankar" <ravi.v.shankar@...el.com>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: iommu@...ts.linux-foundation.org
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: x86@...nel.org
Suggested-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.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/include/asm/irqdomain.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/irqdomain.h b/arch/x86/include/asm/irqdomain.h
index 125c23b7bad3..de1cf2e80443 100644
--- a/arch/x86/include/asm/irqdomain.h
+++ b/arch/x86/include/asm/irqdomain.h
@@ -10,6 +10,7 @@ enum {
 	/* Allocate contiguous CPU vectors */
 	X86_IRQ_ALLOC_CONTIGUOUS_VECTORS		= 0x1,
 	X86_IRQ_ALLOC_LEGACY				= 0x2,
+	X86_IRQ_ALLOC_AS_NMI				= 0x4,
 };
 
 extern int x86_fwspec_is_ioapic(struct irq_fwspec *fwspec);
-- 
2.17.1