linux-kernel - [patch V2 36/46] x86/irq: Make most MSI ops XEN private

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200826112334.198633344@linutronix.de>
Date:   Wed, 26 Aug 2020 13:17:04 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org, linux-hyperv@...r.kernel.org,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Jon Derrick <jonathan.derrick@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Wei Liu <wei.liu@...nel.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Steve Wahl <steve.wahl@....com>,
        Dimitri Sivanich <sivanich@....com>,
        Russ Anderson <rja@....com>, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        xen-devel@...ts.xenproject.org, Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Megha Dey <megha.dey@...el.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jacob Pan <jacob.jun.pan@...el.com>,
        Baolu Lu <baolu.lu@...el.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: [patch V2 36/46] x86/irq: Make most MSI ops XEN private

From: Thomas Gleixner <tglx@...utronix.de>

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

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

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

--- 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);
 };
 
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -157,6 +157,13 @@ static int acpi_register_gsi_xen(struct
 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(str
 	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(str
 	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(voi
 {
 	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;