The following commit has been merged into the x86/irq branch of tip: Commit-ID: 70b59379efc3c818f48b8037e574654fb29f907c Gitweb: https://git.kernel.org/tip/70b59379efc3c818f48b8037e574654fb29f907c Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx> AuthorDate: Wed, 26 Aug 2020 13:16:56 +02:00 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Wed, 16 Sep 2020 16:52:36 +02:00 x86/xen: Consolidate XEN-MSI init X86 cannot store the irq domain pointer in struct device without breaking XEN because the irq domain pointer takes precedence over arch_*_msi_irqs() fallbacks. To achieve this XEN MSI interrupt management needs to be wrapped into an irq domain. Move the x86_msi ops setup into a single function to prepare for this. Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Reviewed-by: Juergen Gross <jgross@xxxxxxxx> Link: https://lore.kernel.org/r/20200826112333.420224092@xxxxxxxxxxxxx --- arch/x86/pci/xen.c | 51 ++++++++++++++++++++++++++++----------------- 1 file changed, 32 insertions(+), 19 deletions(-) diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 6a2debe..3a5611b 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -372,7 +372,10 @@ static void xen_initdom_restore_msi_irqs(struct pci_dev *dev) WARN(ret && ret != -ENOSYS, "restore_msi -> %d\n", ret); } } -#endif +#else /* CONFIG_XEN_DOM0 */ +#define xen_initdom_setup_msi_irqs NULL +#define xen_initdom_restore_msi_irqs NULL +#endif /* !CONFIG_XEN_DOM0 */ static void xen_teardown_msi_irqs(struct pci_dev *dev) { @@ -404,7 +407,31 @@ static void xen_teardown_msi_irq(unsigned int irq) WARN_ON_ONCE(1); } -#endif +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; + x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs; + } else { + x86_msi.setup_msi_irqs = xen_setup_msi_irqs; + } + x86_msi.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; + } else { + WARN_ON_ONCE(1); + return; + } + + x86_msi.teardown_msi_irq = xen_teardown_msi_irq; +} + +#else /* CONFIG_PCI_MSI */ +static inline void xen_setup_pci_msi(void) { } +#endif /* CONFIG_PCI_MSI */ int __init pci_xen_init(void) { @@ -421,12 +448,7 @@ int __init pci_xen_init(void) /* Keep ACPI out of the picture */ acpi_noirq_set(); -#ifdef CONFIG_PCI_MSI - x86_msi.setup_msi_irqs = xen_setup_msi_irqs; - x86_msi.teardown_msi_irq = xen_teardown_msi_irq; - x86_msi.teardown_msi_irqs = xen_pv_teardown_msi_irqs; - pci_msi_ignore_mask = 1; -#endif + xen_setup_pci_msi(); return 0; } @@ -446,10 +468,7 @@ static void __init xen_hvm_msi_init(void) ((eax & XEN_HVM_CPUID_APIC_ACCESS_VIRT) && boot_cpu_has(X86_FEATURE_APIC))) return; } - - x86_msi.setup_msi_irqs = xen_hvm_setup_msi_irqs; - x86_msi.teardown_msi_irqs = xen_teardown_msi_irqs; - x86_msi.teardown_msi_irq = xen_teardown_msi_irq; + xen_setup_pci_msi(); } #endif @@ -482,13 +501,7 @@ int __init pci_xen_initial_domain(void) { int irq; -#ifdef CONFIG_PCI_MSI - x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs; - x86_msi.teardown_msi_irq = xen_teardown_msi_irq; - x86_msi.teardown_msi_irqs = xen_teardown_pv_msi_irqs; - x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs; - pci_msi_ignore_mask = 1; -#endif + xen_setup_pci_msi(); __acpi_register_gsi = acpi_register_gsi_xen; __acpi_unregister_gsi = NULL; /*
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