linux-kernel - [tip: x86/irq] x86/irq: Make most MSI ops XEN private

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Date:   Wed, 16 Sep 2020 15:12:03 -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: Make most MSI ops XEN private

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

Commit-ID:     874a2013a07dd8ec48413db5d06d27d02f7765b5
Gitweb:        https://git.kernel.org/tip/874a2013a07dd8ec48413db5d06d27d02f7765b5
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Wed, 26 Aug 2020 13:17:04 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 16 Sep 2020 16:52:38 +02:00

x86/irq: Make most MSI ops XEN private

Nothing except XEN uses the setup/teardown ops. Hide them there.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/20200826112334.198633344@linutronix.de

---
 arch/x86/include/asm/x86_init.h |  2 --
 arch/x86/pci/xen.c              | 21 ++++++++++++++-------
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index d8b597c..397196f 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -276,8 +276,6 @@ struct x86_platform_ops {
 struct pci_dev;
 
 struct x86_msi_ops {
-	int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
-	void (*teardown_msi_irqs)(struct pci_dev *dev);
 	void (*restore_msi_irqs)(struct pci_dev *dev);
 };
 
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index cb90095..c552cd2 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -157,6 +157,13 @@ static int acpi_register_gsi_xen(struct device *dev, u32 gsi,
 struct xen_pci_frontend_ops *xen_pci_frontend;
 EXPORT_SYMBOL_GPL(xen_pci_frontend);
 
+struct xen_msi_ops {
+	int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
+	void (*teardown_msi_irqs)(struct pci_dev *dev);
+};
+
+static struct xen_msi_ops xen_msi_ops __ro_after_init;
+
 static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
 	int irq, ret, i;
@@ -415,7 +422,7 @@ static int xen_msi_domain_alloc_irqs(struct irq_domain *domain,
 	else
 		type = PCI_CAP_ID_MSI;
 
-	return x86_msi.setup_msi_irqs(to_pci_dev(dev), nvec, type);
+	return xen_msi_ops.setup_msi_irqs(to_pci_dev(dev), nvec, type);
 }
 
 static void xen_msi_domain_free_irqs(struct irq_domain *domain,
@@ -424,7 +431,7 @@ static void xen_msi_domain_free_irqs(struct irq_domain *domain,
 	if (WARN_ON_ONCE(!dev_is_pci(dev)))
 		return;
 
-	x86_msi.teardown_msi_irqs(to_pci_dev(dev));
+	xen_msi_ops.teardown_msi_irqs(to_pci_dev(dev));
 }
 
 static struct msi_domain_ops xen_pci_msi_domain_ops = {
@@ -463,16 +470,16 @@ static __init void xen_setup_pci_msi(void)
 {
 	if (xen_pv_domain()) {
 		if (xen_initial_domain()) {
-			x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs;
+			xen_msi_ops.setup_msi_irqs = xen_initdom_setup_msi_irqs;
 			x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs;
 		} else {
-			x86_msi.setup_msi_irqs = xen_setup_msi_irqs;
+			xen_msi_ops.setup_msi_irqs = xen_setup_msi_irqs;
 		}
-		x86_msi.teardown_msi_irqs = xen_pv_teardown_msi_irqs;
+		xen_msi_ops.teardown_msi_irqs = xen_pv_teardown_msi_irqs;
 		pci_msi_ignore_mask = 1;
 	} else if (xen_hvm_domain()) {
-		x86_msi.setup_msi_irqs = xen_hvm_setup_msi_irqs;
-		x86_msi.teardown_msi_irqs = xen_teardown_msi_irqs;
+		xen_msi_ops.setup_msi_irqs = xen_hvm_setup_msi_irqs;
+		xen_msi_ops.teardown_msi_irqs = xen_teardown_msi_irqs;
 	} else {
 		WARN_ON_ONCE(1);
 		return;