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

From: tip-bot2 for Thomas Gleixner
Date: Wed Sep 16 2020 - 14:47:33 EST


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@xxxxxxxxxxxxx>
AuthorDate: Wed, 26 Aug 2020 13:17:04 +02:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200826112334.198633344@xxxxxxxxxxxxx

---
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;