From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 24 Nov 2022 23:24:08 +0000 (+0100)
Subject: genirq/msi: Move IRQ_DOMAIN_MSI_NOMASK_QUIRK to MSI flags
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3dad5f9ad99b77dfd234d31e2ea3d77f620efc09;p=linux.git

genirq/msi: Move IRQ_DOMAIN_MSI_NOMASK_QUIRK to MSI flags

It's truly a MSI only flag and for the upcoming per device MSI domains this
must be in the MSI flags so it can be set during domain setup without
exposing this quirk outside of x86.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124230313.454246167@linutronix.de
---

diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 248a6a5c0ad8a..71c87513327e5 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -176,7 +176,8 @@ static struct msi_domain_ops pci_msi_domain_ops = {
 
 static struct msi_domain_info pci_msi_domain_info = {
 	.flags		= MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-			  MSI_FLAG_PCI_MSIX,
+			  MSI_FLAG_PCI_MSIX | MSI_FLAG_NOMASK_QUIRK,
+
 	.ops		= &pci_msi_domain_ops,
 	.chip		= &pci_msi_controller,
 	.handler	= handle_edge_irq,
@@ -200,8 +201,6 @@ struct irq_domain * __init native_create_pci_msi_domain(void)
 	if (!d) {
 		irq_domain_free_fwnode(fn);
 		pr_warn("Failed to initialize PCI-MSI irqdomain.\n");
-	} else {
-		d->flags |= IRQ_DOMAIN_MSI_NOMASK_QUIRK;
 	}
 	return d;
 }
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index a4af7f81661b5..c42c36947f95f 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -186,15 +186,8 @@ enum {
 	/* Irq domain implements MSI remapping */
 	IRQ_DOMAIN_FLAG_MSI_REMAP	= (1 << 5),
 
-	/*
-	 * Quirk to handle MSI implementations which do not provide
-	 * masking. Currently known to affect x86, but partially
-	 * handled in core code.
-	 */
-	IRQ_DOMAIN_MSI_NOMASK_QUIRK	= (1 << 6),
-
 	/* Irq domain doesn't translate anything */
-	IRQ_DOMAIN_FLAG_NO_MAP		= (1 << 7),
+	IRQ_DOMAIN_FLAG_NO_MAP		= (1 << 6),
 
 	/*
 	 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 1ce9d5e0bfa3b..2d87e000bd45a 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -399,6 +399,12 @@ enum {
 	MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS	= (1 << 9),
 	/* Free MSI descriptors */
 	MSI_FLAG_FREE_MSI_DESCS		= (1 << 10),
+	/*
+	 * Quirk to handle MSI implementations which do not provide
+	 * masking. Currently known to affect x86, but has to be partially
+	 * handled in the core MSI code.
+	 */
+	MSI_FLAG_NOMASK_QUIRK		= (1 << 11),
 };
 
 int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 4b99f37355d54..c37c0be4d6464 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -875,7 +875,7 @@ static int __msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev
 		 * MSI affinity setting requires a special quirk (X86) when
 		 * reservation mode is active.
 		 */
-		if (domain->flags & IRQ_DOMAIN_MSI_NOMASK_QUIRK)
+		if (info->flags & MSI_FLAG_NOMASK_QUIRK)
 			vflags |= VIRQ_NOMASK_QUIRK;
 	}