linux-kernel - [tip: x86/irq] x86/irq: Prepare consolidation of irq_alloc

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Date:   Wed, 16 Sep 2020 15:12:21 -0000
From:   "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/irq] x86/irq: Prepare consolidation of irq_alloc_info

The following commit has been merged into the x86/irq branch of tip:

Commit-ID:     874d9b3a958897e914982962fa25b3bb9dc07988
Gitweb:        https://git.kernel.org/tip/874d9b3a958897e914982962fa25b3bb9dc07988
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Wed, 26 Aug 2020 13:16:40 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 16 Sep 2020 16:52:30 +02:00

x86/irq: Prepare consolidation of irq_alloc_info

struct irq_alloc_info is a horrible zoo of unnamed structs in a union. Many
of the struct fields can be generic and don't have to be type specific like
hpet_id, ioapic_id...

Provide a generic set of members to prepare for the consolidation. The goal
is to make irq_alloc_info have the same basic member as the generic
msi_alloc_info so generic MSI domain ops can be reused and yet more mess
can be avoided when (non-PCI) device MSI support comes along.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/20200826112331.849577844@linutronix.de
---
 arch/x86/include/asm/hw_irq.h | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 91b064d..b0e15f6 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -44,10 +44,25 @@ enum irq_alloc_type {
 	X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT,
 };
 
+/**
+ * irq_alloc_info - X86 specific interrupt allocation info
+ * @type:	X86 specific allocation type
+ * @flags:	Flags for allocation tweaks
+ * @devid:	Device ID for allocations
+ * @hwirq:	Associated hw interrupt number in the domain
+ * @mask:	CPU mask for vector allocation
+ * @desc:	Pointer to msi descriptor
+ * @data:	Allocation specific data
+ */
 struct irq_alloc_info {
 	enum irq_alloc_type	type;
 	u32			flags;
-	const struct cpumask	*mask;	/* CPU mask for vector allocation */
+	u32			devid;
+	irq_hw_number_t		hwirq;
+	const struct cpumask	*mask;
+	struct msi_desc		*desc;
+	void			*data;
+
 	union {
 		int		unused;
 #ifdef	CONFIG_HPET_TIMER
@@ -88,11 +103,6 @@ struct irq_alloc_info {
 			char		*uv_name;
 		};
 #endif
-#if IS_ENABLED(CONFIG_VMD)
-		struct {
-			struct msi_desc *desc;
-		};
-#endif
 	};
 };